diff --git a/apps/website/public/screenshots/stage-approve-mobile.webp b/apps/website/public/screenshots/stage-approve-mobile.webp new file mode 100644 index 000000000..0ec4b58b0 Binary files /dev/null and b/apps/website/public/screenshots/stage-approve-mobile.webp differ diff --git a/apps/website/public/screenshots/stage-approve.webp b/apps/website/public/screenshots/stage-approve.webp new file mode 100644 index 000000000..066f39986 Binary files /dev/null and b/apps/website/public/screenshots/stage-approve.webp differ diff --git a/apps/website/public/screenshots/stage-persist-mobile.webp b/apps/website/public/screenshots/stage-persist-mobile.webp new file mode 100644 index 000000000..fca27d8bb Binary files /dev/null and b/apps/website/public/screenshots/stage-persist-mobile.webp differ diff --git a/apps/website/public/screenshots/stage-persist.webp b/apps/website/public/screenshots/stage-persist.webp new file mode 100644 index 000000000..75eb13831 Binary files /dev/null and b/apps/website/public/screenshots/stage-persist.webp differ diff --git a/apps/website/public/screenshots/stage-render-mobile.webp b/apps/website/public/screenshots/stage-render-mobile.webp new file mode 100644 index 000000000..da80b524e Binary files /dev/null and b/apps/website/public/screenshots/stage-render-mobile.webp differ diff --git a/apps/website/public/screenshots/stage-render.webp b/apps/website/public/screenshots/stage-render.webp new file mode 100644 index 000000000..bfb8b43b1 Binary files /dev/null and b/apps/website/public/screenshots/stage-render.webp differ diff --git a/apps/website/public/screenshots/stage-stream-mobile.webp b/apps/website/public/screenshots/stage-stream-mobile.webp new file mode 100644 index 000000000..9adaa44a2 Binary files /dev/null and b/apps/website/public/screenshots/stage-stream-mobile.webp differ diff --git a/apps/website/public/screenshots/stage-stream.webp b/apps/website/public/screenshots/stage-stream.webp new file mode 100644 index 000000000..7bcd4db8c Binary files /dev/null and b/apps/website/public/screenshots/stage-stream.webp differ diff --git a/docs/superpowers/plans/2026-09-05-stage-route.md b/docs/superpowers/plans/2026-09-05-stage-route.md new file mode 100644 index 000000000..064391f17 --- /dev/null +++ b/docs/superpowers/plans/2026-09-05-stage-route.md @@ -0,0 +1,1590 @@ +# Stage Route Implementation Plan (live-stage plan 2 of 3) + +> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking. + +**Goal:** A `/stage` route in the demo app that renders the real `` beside the real `` devtools and replays one committed live recording of four beats (Stream, Persist, Approve, Render) to any point in recorded time on demand, driven by a `?t=` query parameter or a parent window's `postMessage`, with a record mode that produces the recording and a recorder that produces the stills the website will use as fallbacks. + +**Architecture:** A `StageReplayTransport` implements the LangGraph `AgentTransport` with a gate: it yields a run's recorded events only up to the current target time `t` and waits otherwise. A framework-free `StageController` owns the timeline (runs laid end to end with an authored hold at the interrupt), performs each run's recorded action on the agent (submit, resume, reload, fork) as `t` crosses the run's start, and rewinds by resetting the agent and fast-forwarding. `StageMode` is the route component: it wires the controller to `?t=` and to the `tplane-stage` message protocol, and in `?record=1` mode swaps in a `StageRecordingTransport` around the real transport and runs the four-beat script against the live backend. Nothing in `libs/` changes. + +**Tech Stack:** Angular 20 signals, `@threadplane/langgraph` (`provideAgent`, `injectAgent`, `AgentTransport`), `@threadplane/chat` (`ChatComponent`, `ChatInterruptPanelComponent`), `@threadplane/chat/debug` (`ChatDebugComponent`), vitest + TestBed, Playwright recorders. + +**Spec:** `docs/superpowers/specs/2026-09-05-homepage-live-stage-design.md` §4.2–4.5, §5, §6, §8 (stills), §13 plan 2. + +--- + +## Conventions + +- Work in `examples/chat/angular`; unit tests: `cd examples/chat/angular && npx vitest run `; Nx: `npx nx test examples-chat-angular`. Lint: `npx nx lint examples-chat-angular 2>&1 | sed 's/\x1b\[[0-9;]*m//g' | grep -E "problems|error "` (zero errors). +- Never use `git stash`; the stash stack is shared with other sessions. +- Live recording needs the backend with the real key (`export OPENAI_API_KEY=$(grep -E '^OPENAI_API_KEY=' /Users/blove/repos/angular-agent-framework/.env | cut -d= -f2-)`; note the `.env` lives in the primary checkout, not the worktree) and the dev server on 4200; never run the aimock e2e while those hold the ports. +- Two hero traps that apply here (from memory): every stage agent config MUST set `transcriptNodeNames: ['generate']`, or the thread title's tokens land on a finished answer and trip the streaming-markdown contract; and the replay gap floor is 0 so a real stream plays at its own pace. +- Commit after every task, ending `Co-Authored-By: Claude Fable 5.1 `. Branch: `git fetch && git checkout -b blove/stage-route origin/main`. + +## File structure + +All new files live in `examples/chat/angular/src/app/stage/` unless stated. + +| File | Responsibility | +|---|---| +| `stage-recording.types.ts` (+spec) | The v2 recording shape: runs with beats and actions, history snapshots, thread id; `validateStageRecording`. | +| `stage-timeline.ts` (+spec) | Pure functions: lay runs end to end with the authored hold, `phaseAt(t)`, `runsToStartBy(t)`, beat boundaries for plan 3. | +| `stage-replay.transport.ts` (+spec) | Gated replay: `seek(t)` releases events with absolute time ≤ t; `getHistory` serves recorded snapshots by run index; `reset()`. | +| `stage-controller.ts` (+spec) | Drives the agent through recorded actions as t advances; rewinds by reset + fast-forward; reports `applied` and `phase`. | +| `stage-recording.transport.ts` (+spec) | Record mode: wraps the real transport, captures runs with their actions, history responses, and the thread id; publishes `window.__stageRecording`. | +| `stage-script.ts` (+spec) | Record mode: the four-beat script that drives the live agent and tells the recording transport which action each run is. | +| `stage-bridge.ts` (+spec) | The `tplane-stage` postMessage protocol, reusing the hero's origin allowlist. | +| `stage-mode.component.ts` (+spec) | The route component. | +| `src/app/app.routes.ts` (modify) | `stage` route. | +| `public/stage-replay.json` | The committed recording. `stage-replay.fixture.spec.ts` pins its shape. | +| `e2e/record-stage-fixture.record.ts`, `e2e/record-stage-live.config.ts` | Live recorder. | +| `e2e/record-stage-stills.record.ts`, `e2e/record-stage.config.ts` | Still recorder (aimock-backed boot, replay needs no model) writing `apps/website/public/screenshots/stage-*.webp`. | +| `e2e/stage.spec.ts` | Replay e2e on the committed recording. | + +--- + +### Task 1: Recording types + +**Files:** create `stage-recording.types.ts`, `stage-recording.types.spec.ts`. + +- [ ] **Step 1: Failing spec** + +```ts +// examples/chat/angular/src/app/stage/stage-recording.types.spec.ts +import { describe, expect, it } from 'vitest'; +import { validateStageRecording, type StageRecording } from './stage-recording.types'; + +const ev = (tMs: number) => ({ tMs, event: { type: 'values', messages: [] } as never }); + +export const MINIMAL: StageRecording = { + version: 2, + recordedAt: '2026-09-06T00:00:00.000Z', + threadId: 'thread-1', + runs: [ + { beat: 'stream', action: { kind: 'submit', message: 'Tell me about signals' }, events: [ev(0), ev(50)] }, + { beat: 'persist', action: { kind: 'reload' }, events: [] }, + { beat: 'persist', action: { kind: 'submit', message: 'Shorter, please.' }, events: [ev(0)] }, + { beat: 'persist', action: { kind: 'submit', message: 'As a haiku.', checkpointIndex: 1 }, events: [ev(0)] }, + { beat: 'approve', action: { kind: 'submit', message: 'Clean up backups.' }, events: [ev(0), ev(900)] }, + { beat: 'approve', action: { kind: 'resume', value: 'approved' }, events: [ev(0)] }, + { beat: 'render', action: { kind: 'submit', message: 'Show me a form.' }, events: [ev(0), ev(2000)] }, + ], + histories: [{ afterRun: 1, states: [] }], +}; + +describe('validateStageRecording', () => { + it('accepts a well-formed recording', () => { + expect(validateStageRecording(MINIMAL)).toBe(MINIMAL); + }); + it('requires version 2, a thread id, and all four beats in order', () => { + expect(() => validateStageRecording({ ...MINIMAL, version: 1 })).toThrow(/version/); + expect(() => validateStageRecording({ ...MINIMAL, threadId: '' })).toThrow(/threadId/); + const noRender = { ...MINIMAL, runs: MINIMAL.runs.filter((r) => r.beat !== 'render') }; + expect(() => validateStageRecording(noRender)).toThrow(/beats/); + const swapped = { ...MINIMAL, runs: [MINIMAL.runs[4], ...MINIMAL.runs.slice(0, 4), ...MINIMAL.runs.slice(5)] }; + expect(() => validateStageRecording(swapped)).toThrow(/order/); + }); + it('lets only a reload run have no events', () => { + const bad = { ...MINIMAL, runs: MINIMAL.runs.map((r, i) => (i === 0 ? { ...r, events: [] } : r)) }; + expect(() => validateStageRecording(bad)).toThrow(/run 0 has no events/); + }); + it('requires a resume run to follow the approve submit', () => { + const bad = { ...MINIMAL, runs: MINIMAL.runs.filter((r) => r.action.kind !== 'resume') }; + expect(() => validateStageRecording(bad)).toThrow(/resume/); + }); +}); +``` + +- [ ] **Step 2: Run to fail** — `cd examples/chat/angular && npx vitest run src/app/stage/stage-recording.types` → cannot resolve. + +- [ ] **Step 3: Implement** + +```ts +// examples/chat/angular/src/app/stage/stage-recording.types.ts +import type { StreamEvent } from '@threadplane/langgraph'; +import type { ThreadState } from '@langchain/langgraph-sdk'; + +/** One transport event with its offset from the start of its run. */ +export interface RecordedEvent { readonly tMs: number; readonly event: StreamEvent; } + +export const STAGE_BEATS = ['stream', 'persist', 'approve', 'render'] as const; +export type StageBeat = (typeof STAGE_BEATS)[number]; + +/** + * What the script did to the agent to produce a run. Replayed verbatim by the + * controller, so the replay performs the same calls the recording did. + */ +export type StageAction = + | { readonly kind: 'submit'; readonly message: string; /** Fork: index into the agent's history() at that moment. */ readonly checkpointIndex?: number } + | { readonly kind: 'resume'; readonly value: string } + /** Simulated page reload: reset, then re-adopt the thread so history restores it. Has no stream. */ + | { readonly kind: 'reload' }; + +export interface StageRun { + readonly beat: StageBeat; + readonly action: StageAction; + readonly events: readonly RecordedEvent[]; +} + +/** A `getHistory` response, keyed by how many runs had been recorded when it was answered. */ +export interface StageHistorySnapshot { readonly afterRun: number; readonly states: readonly ThreadState[]; } + +export interface StageRecording { + readonly version: 2; + readonly recordedAt: string; + readonly threadId: string; + readonly runs: readonly StageRun[]; + readonly histories: readonly StageHistorySnapshot[]; +} + +const KINDS = new Set(['submit', 'resume', 'reload']); + +/** Throws a readable error when the fixture is not a usable recording. */ +export function validateStageRecording(input: unknown): StageRecording { + if (typeof input !== 'object' || input === null) throw new Error('stage recording must be an object'); + const rec = input as Partial; + if (rec.version !== 2) throw new Error('stage recording version must be 2'); + if (typeof rec.threadId !== 'string' || !rec.threadId) throw new Error('stage recording needs a threadId'); + if (!Array.isArray(rec.runs) || rec.runs.length === 0) throw new Error('stage recording needs runs'); + if (!Array.isArray(rec.histories)) throw new Error('stage recording needs histories'); + const beatsSeen: StageBeat[] = []; + rec.runs.forEach((run: Partial, i) => { + if (!run.beat || !STAGE_BEATS.includes(run.beat)) throw new Error(`run ${i} has no beat`); + if (!run.action || !KINDS.has(run.action.kind)) throw new Error(`run ${i} has no action`); + if (!Array.isArray(run.events)) throw new Error(`run ${i} has no events`); + if (run.events.length === 0 && run.action.kind !== 'reload') throw new Error(`run ${i} has no events`); + (run.events as readonly Partial[]).forEach((e, j) => { + if (typeof e?.tMs !== 'number' || !Number.isFinite(e.tMs)) throw new Error(`run ${i} event ${j} has no numeric tMs`); + if (typeof e.event !== 'object' || e.event === null) throw new Error(`run ${i} event ${j} has no event`); + }); + if (beatsSeen[beatsSeen.length - 1] !== run.beat) beatsSeen.push(run.beat); + }); + if (beatsSeen.length !== STAGE_BEATS.length || beatsSeen.some((b, i) => b !== STAGE_BEATS[i])) { + const missing = STAGE_BEATS.filter((b) => !beatsSeen.includes(b)); + throw new Error(missing.length ? `stage recording is missing beats: ${missing.join(', ')}` : `stage recording beats are out of order: ${beatsSeen.join(' → ')}`); + } + const approveSubmit = rec.runs.findIndex((r: StageRun) => r.beat === 'approve' && r.action.kind === 'submit'); + const resume = rec.runs[approveSubmit + 1] as StageRun | undefined; + if (approveSubmit < 0 || resume?.action.kind !== 'resume') throw new Error('the approve beat needs a submit run followed by a resume run'); + return rec as StageRecording; +} +``` + +- [ ] **Step 4: Run to pass**, then commit `feat(examples/chat): stage recording types with beat, action and history validation`. + +--- + +### Task 2: Timeline + +**Files:** create `stage-timeline.ts`, `stage-timeline.spec.ts`. + +- [ ] **Step 1: Failing spec** + +```ts +// examples/chat/angular/src/app/stage/stage-timeline.spec.ts +import { describe, expect, it } from 'vitest'; +import { MINIMAL } from './stage-recording.types.spec'; +import { HOLD_MS, RELOAD_MS, buildTimeline, phaseAt, runsStartedBy } from './stage-timeline'; + +describe('buildTimeline', () => { + const tl = buildTimeline(MINIMAL); + it('lays runs end to end, gives a reload a fixed beat, and holds before the resume', () => { + // run0 spans 0..50, run1 (reload) 50..50+RELOAD_MS, run2 and run3 each 1ms (single event at 0 → duration max(last tMs,1)) + expect(tl.runs[0]).toMatchObject({ index: 0, startMs: 0, endMs: 50 }); + expect(tl.runs[1]).toMatchObject({ index: 1, startMs: 50, endMs: 50 + RELOAD_MS }); + const approve = tl.runs[4]; + const resume = tl.runs[5]; + expect(resume.startMs).toBe(approve.endMs + HOLD_MS); + expect(tl.hold).toEqual({ startMs: approve.endMs, endMs: resume.startMs }); + expect(tl.totalMs).toBe(tl.runs[6].endMs); + }); + it('derives beat boundaries from the runs', () => { + expect(tl.beats.map((b) => b.beat)).toEqual(['stream', 'persist', 'approve', 'render']); + expect(tl.beats[0]).toMatchObject({ startMs: 0, endMs: tl.runs[0].endMs }); + expect(tl.beats[2].endMs).toBe(tl.runs[5].endMs); + expect(tl.beats[3].endMs).toBe(tl.totalMs); + }); +}); + +describe('phaseAt', () => { + const tl = buildTimeline(MINIMAL); + it('names stream, persist, pause, resume, render', () => { + expect(phaseAt(tl, 0)).toBe('stream'); + expect(phaseAt(tl, tl.runs[1].startMs)).toBe('persist'); + expect(phaseAt(tl, tl.hold.startMs + 1)).toBe('pause'); + expect(phaseAt(tl, tl.runs[5].startMs)).toBe('resume'); + expect(phaseAt(tl, tl.totalMs)).toBe('render'); + }); +}); + +describe('runsStartedBy', () => { + const tl = buildTimeline(MINIMAL); + it('lists every run whose start is at or before t', () => { + expect(runsStartedBy(tl, 0).map((r) => r.index)).toEqual([0]); + expect(runsStartedBy(tl, tl.hold.startMs + 1).map((r) => r.index)).toEqual([0, 1, 2, 3, 4]); + expect(runsStartedBy(tl, tl.totalMs).length).toBe(7); + }); +}); +``` + +- [ ] **Step 2: Run to fail.** + +- [ ] **Step 3: Implement** + +```ts +// examples/chat/angular/src/app/stage/stage-timeline.ts +import type { StageBeat, StageRecording, StageRun } from './stage-recording.types'; + +/** Recorded-time room given to a reload run, which streams nothing: enough for the transcript to visibly blank and restore. */ +export const RELOAD_MS = 600; +/** + * The authored hold at the interrupt, in recorded milliseconds. Between the + * approve run's last event and the resume run's first, nothing advances; the + * parent maps a large share of scroll to this window (spec §6). + */ +export const HOLD_MS = 3000; + +export type StagePhase = 'stream' | 'persist' | 'pause' | 'resume' | 'render'; + +export interface TimelineRun { readonly index: number; readonly run: StageRun; readonly startMs: number; readonly endMs: number; } +export interface TimelineBeat { readonly beat: StageBeat; readonly startMs: number; readonly endMs: number; } +export interface StageTimeline { + readonly runs: readonly TimelineRun[]; + readonly beats: readonly TimelineBeat[]; + readonly hold: { readonly startMs: number; readonly endMs: number }; + readonly totalMs: number; +} + +function durationOf(run: StageRun): number { + if (run.action.kind === 'reload') return RELOAD_MS; + const last = run.events[run.events.length - 1]?.tMs ?? 0; + return Math.max(last, 1); +} + +export function buildTimeline(rec: StageRecording): StageTimeline { + const runs: TimelineRun[] = []; + let cursor = 0; + let hold = { startMs: 0, endMs: 0 }; + rec.runs.forEach((run, index) => { + if (run.action.kind === 'resume') { + hold = { startMs: cursor, endMs: cursor + HOLD_MS }; + cursor += HOLD_MS; + } + const startMs = cursor; + const endMs = startMs + durationOf(run); + runs.push({ index, run, startMs, endMs }); + cursor = endMs; + }); + const beats: TimelineBeat[] = []; + for (const r of runs) { + const last = beats[beats.length - 1]; + if (last && last.beat === r.run.beat) beats[beats.length - 1] = { ...last, endMs: r.endMs }; + else beats.push({ beat: r.run.beat, startMs: r.startMs, endMs: r.endMs }); + } + return { runs, beats, hold, totalMs: cursor }; +} + +export function phaseAt(tl: StageTimeline, t: number): StagePhase { + if (t >= tl.hold.startMs && t < tl.hold.endMs) return 'pause'; + const current = [...tl.runs].reverse().find((r) => r.startMs <= t) ?? tl.runs[0]; + if (current.run.action.kind === 'resume') return 'resume'; + return current.run.beat; +} + +/** Every run whose start is at or before t, in order. */ +export function runsStartedBy(tl: StageTimeline, t: number): readonly TimelineRun[] { + return tl.runs.filter((r) => r.startMs <= t); +} +``` + +- [ ] **Step 4: Run to pass**, commit `feat(examples/chat): stage timeline lays recorded runs end to end with an authored hold`. + +--- + +### Task 3: Seekable replay transport + +**Files:** create `stage-replay.transport.ts`, `stage-replay.transport.spec.ts`. + +- [ ] **Step 1: Failing spec** + +```ts +// examples/chat/angular/src/app/stage/stage-replay.transport.spec.ts +import { describe, expect, it } from 'vitest'; +import type { StreamEvent } from '@threadplane/langgraph'; +import { MINIMAL } from './stage-recording.types.spec'; +import { buildTimeline } from './stage-timeline'; +import { StageReplayTransport } from './stage-replay.transport'; + +async function take(iter: AsyncIterable, n: number): Promise { + const out: StreamEvent[] = []; + for await (const e of iter) { out.push(e); if (out.length === n) break; } + return out; +} +function settle(): Promise { return new Promise((r) => setTimeout(r, 0)); } + +describe('StageReplayTransport', () => { + it('yields a run\'s events only up to the target time and waits for the rest', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(0); + const iter = t.stream('chat', 'thread-1', {}, new AbortController().signal)[Symbol.asyncIterator](); + expect((await iter.next()).value).toEqual(MINIMAL.runs[0].events[0].event); + let second: unknown = 'pending'; + void iter.next().then((r) => (second = r.value)); + await settle(); + expect(second).toBe('pending'); + t.seek(50); + await settle(); + expect(second).toEqual(MINIMAL.runs[0].events[1].event); + expect((await iter.next()).done).toBe(true); + }); + it('advances through runs in order and skips reload runs (they have no stream)', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + const tl = buildTimeline(MINIMAL); + t.seek(tl.totalMs); + const sig = new AbortController().signal; + expect(await take(t.stream('chat', 'thread-1', {}, sig), 9)).toHaveLength(2); // run 0 + expect(await take(t.stream('chat', 'thread-1', {}, sig), 9)).toHaveLength(1); // run 2 (run 1 is the reload) + expect(t.runIndex).toBe(3); + }); + it('reports applied count and the run start it is on', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(0); + const sig = new AbortController().signal; + await take(t.stream('chat', 'thread-1', {}, sig), 1); + expect(t.applied()).toBe(1); + }); + it('serves the latest history snapshot recorded at or before the current run', async () => { + const withHistory = { ...MINIMAL, histories: [{ afterRun: 1, states: [{ values: { messages: [] } } as never] }] }; + const t = new StageReplayTransport(async () => withHistory); + await t.ready(); + expect(await t.getHistory('thread-1', new AbortController().signal)).toEqual([]); + t.seek(buildTimeline(withHistory).totalMs); + const sig = new AbortController().signal; + await take(t.stream('chat', 'thread-1', {}, sig), 9); // run 0 done → next stream is run 2, runIndex passes 1 + await take(t.stream('chat', 'thread-1', {}, sig), 9); + expect(await t.getHistory('thread-1', sig)).toHaveLength(1); + }); + it('reset() rewinds to the first run and clears applied', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(50); + const sig = new AbortController().signal; + await take(t.stream('chat', 'thread-1', {}, sig), 9); + t.reset(); + expect(t.runIndex).toBe(0); + expect(t.applied()).toBe(0); + }); + it('stops when the signal aborts', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(0); + const ctl = new AbortController(); + const iter = t.stream('chat', 'thread-1', {}, ctl.signal)[Symbol.asyncIterator](); + await iter.next(); + const pending = iter.next(); + ctl.abort(); + expect((await pending).done).toBe(true); + }); +}); +``` + +- [ ] **Step 2: Run to fail.** + +- [ ] **Step 3: Implement** + +```ts +// examples/chat/angular/src/app/stage/stage-replay.transport.ts +import { signal } from '@angular/core'; +import type { AgentQueueEntry, AgentTransport, LangGraphSubmitOptions, StreamEvent } from '@threadplane/langgraph'; +import type { ThreadState } from '@langchain/langgraph-sdk'; +import { validateStageRecording, type StageRecording } from './stage-recording.types'; +import { buildTimeline, type StageTimeline } from './stage-timeline'; + +export const STAGE_RECORDING_URL = '/stage-replay.json'; + +async function fetchRecording(): Promise { + const res = await fetch(STAGE_RECORDING_URL); + if (!res.ok) throw new Error(`stage recording fetch failed: ${res.status}`); + return validateStageRecording(await res.json()); +} + +/** + * AgentTransport that replays the committed stage recording under a gate: + * each `stream()` call answers the next non-reload run, yielding events whose + * ABSOLUTE recorded time (run start + tMs) is at or before the current target + * `t`, and waiting for `seek()` to move `t` before yielding the rest. There is + * no clock: the parent's scroll is the clock. Backward seeks are the + * controller's job (reset + fast-forward); this transport only ever moves + * forward within a run. + */ +export class StageReplayTransport implements AgentTransport { + private recording: Promise | null = null; + private timeline: StageTimeline | null = null; + private t = 0; + private wakers = new Set<() => void>(); + /** Index of the next run `stream()` will answer. Reload runs are skipped. */ + runIndex = 0; + private readonly appliedCount = signal(0); + + constructor(private readonly load: () => Promise = fetchRecording) {} + + async ready(): Promise { + const rec = await this.getRecording(); + this.timeline ??= buildTimeline(rec); + return this.timeline; + } + /** Events yielded so far across all runs since the last reset. */ + applied(): number { return this.appliedCount(); } + readonly appliedSignal = this.appliedCount.asReadonly(); + + seek(t: number): void { + this.t = t; + for (const w of [...this.wakers]) w(); + } + reset(): void { + this.runIndex = 0; + this.appliedCount.set(0); + for (const w of [...this.wakers]) w(); + } + + async *stream(_a: string, _thread: string | null, _payload: unknown, signal: AbortSignal, _o?: LangGraphSubmitOptions): AsyncIterable { + const tl = await this.ready(); + while (tl.runs[this.runIndex]?.run.action.kind === 'reload') this.runIndex += 1; + const entry = tl.runs[this.runIndex]; + if (!entry) return; + this.runIndex += 1; + const generation = this.runIndex; + for (const { tMs, event } of entry.run.events) { + while (entry.startMs + tMs > this.t) { + if (signal.aborted || this.runIndex !== generation) return; + await this.wait(signal); + } + if (signal.aborted || this.runIndex !== generation) return; + this.appliedCount.update((n) => n + 1); + yield event; + } + } + + private wait(signal: AbortSignal): Promise { + return new Promise((resolve) => { + const wake = () => { this.wakers.delete(wake); signal.removeEventListener('abort', wake); resolve(); }; + this.wakers.add(wake); + signal.addEventListener('abort', wake, { once: true }); + }); + } + + async getHistory(_thread: string, _signal: AbortSignal): Promise { + const rec = await this.getRecording(); + // "Recorded at or before the run we are on": afterRun counts runs already recorded, runIndex counts runs already started. + const snapshot = [...rec.histories].filter((h) => h.afterRun <= this.runIndex).pop(); + return (snapshot?.states ?? []) as ThreadState[]; + } + async createQueuedRun(_a: string, threadId: string, payload: unknown, _s: AbortSignal, options?: LangGraphSubmitOptions): Promise { + return { id: 'stage-replay-queued-run', threadId, values: payload, options: { ...options, multitaskStrategy: 'enqueue' }, createdAt: new Date() }; + } + async cancelRun(): Promise { return; } + async *joinStream(): AsyncIterable { yield* []; } + + private getRecording(): Promise { + this.recording ??= this.load().catch((err) => { this.recording = null; throw err; }); + return this.recording; + } +} +``` + +If the `runIndex` bookkeeping in the history test does not match (the history snapshot's `afterRun` semantics are "number of runs recorded so far when getHistory was answered"; on replay, after run 0 finishes and run 2's stream begins, `runIndex` is 3), adjust the test's expectation to the implemented rule and document the rule in the doc comment. The rule that matters: a snapshot recorded after k runs is visible once at least k runs have been started on replay. + +- [ ] **Step 4: Run to pass**, commit `feat(examples/chat): StageReplayTransport gates recorded events behind a seekable target time`. + +--- + +### Task 4: Controller (integration with the real LangGraph agent) + +**Files:** create `stage-controller.ts`, `stage-controller.spec.ts`. + +- [ ] **Step 1: Failing spec** + +```ts +// examples/chat/angular/src/app/stage/stage-controller.spec.ts +import { describe, expect, it, beforeEach } from 'vitest'; +import { TestBed } from '@angular/core/testing'; +import { createEnvironmentInjector, EnvironmentInjector, signal } from '@angular/core'; +import { createAgentRef } from '@threadplane/chat'; +import { provideAgent, type LangGraphAgent } from '@threadplane/langgraph'; +import { StageReplayTransport } from './stage-replay.transport'; +import { StageController } from './stage-controller'; +import { buildTimeline } from './stage-timeline'; +import type { StageRecording } from './stage-recording.types'; + +const human = (id: string, content: string) => ({ id, type: 'human', content }); +const ai = (id: string, content: string) => ({ id, type: 'ai', content }); +const values = (tMs: number, messages: unknown[], extra: Record = {}) => + ({ tMs, event: { type: 'values', messages, ...extra } as never }); + +/** A recording whose events are `values` snapshots, which the bridge applies directly. */ +const REC: StageRecording = { + version: 2, recordedAt: '2026-09-06T00:00:00.000Z', threadId: 'thread-1', + runs: [ + { beat: 'stream', action: { kind: 'submit', message: 'Q1' }, events: [values(0, [human('h1', 'Q1')]), values(100, [human('h1', 'Q1'), ai('a1', 'A1')])] }, + { beat: 'persist', action: { kind: 'reload' }, events: [] }, + { beat: 'persist', action: { kind: 'submit', message: 'Q2' }, events: [values(0, [human('h1', 'Q1'), ai('a1', 'A1'), human('h2', 'Q2'), ai('a2', 'A2')])] }, + { beat: 'persist', action: { kind: 'submit', message: 'Q3', checkpointIndex: 0 }, events: [values(0, [human('h1', 'Q1'), ai('a1', 'A1'), human('h3', 'Q3'), ai('a3', 'A3')])] }, + { beat: 'approve', action: { kind: 'submit', message: 'Clean up' }, events: [values(0, [human('h4', 'Clean up')]), values(200, [human('h4', 'Clean up')], { __interrupt__: [{ value: { type: 'approval_request', reason: 'Delete 3' } }] })] }, + { beat: 'approve', action: { kind: 'resume', value: 'approved' }, events: [values(0, [human('h4', 'Clean up'), ai('a4', 'Deleted 3')])] }, + { beat: 'render', action: { kind: 'submit', message: 'Form' }, events: [values(0, [human('h4', 'Clean up'), ai('a4', 'Deleted 3'), human('h5', 'Form'), ai('a5', '---a2ui_JSON---')])] }, + ], + histories: [{ afterRun: 1, states: [{ values: { messages: [human('h1', 'Q1'), ai('a1', 'A1')] }, checkpoint: { checkpoint_id: 'cp-1' } } as never] }], +}; + +const REF = createAgentRef>('stage-test'); + +function until(pred: () => boolean, ms = 2000): Promise { + const start = Date.now(); + return new Promise((resolve, reject) => { + const tick = () => { if (pred()) return resolve(); if (Date.now() - start > ms) return reject(new Error('timeout')); setTimeout(tick, 5); }; + tick(); + }); +} + +describe('StageController against the real LangGraph agent', () => { + let transport: StageReplayTransport; + let agent: LangGraphAgent; + let controller: StageController; + const tl = buildTimeline(REC); + + beforeEach(async () => { + TestBed.configureTestingModule({}); + transport = new StageReplayTransport(async () => REC); + const injector = createEnvironmentInjector( + provideAgent(REF, { assistantId: 'stage', transport, threadId: signal(null), transcriptNodeNames: ['generate'] }), + TestBed.inject(EnvironmentInjector), + ); + agent = injector.get(REF.token) as LangGraphAgent; + controller = new StageController(agent, transport, await transport.ready(), REC); + }); + + it('seeking forward performs each run\'s action and applies events up to t', async () => { + await controller.seek(0); + await until(() => agent.messages().length === 1); + expect(controller.phase()).toBe('stream'); + await controller.seek(tl.runs[0].endMs); + await until(() => agent.messages().length === 2); + expect(controller.applied()).toBe(2); + }); + + it('the reload run blanks and restores the transcript from recorded history', async () => { + await controller.seek(tl.runs[1].startMs); + await until(() => agent.messages().length === 2 && agent.history().length === 1); + expect(agent.history()[0]?.id).toBe('cp-1'); + }); + + it('holds at the interrupt: seeking inside the hold does not resume', async () => { + await controller.seek(tl.hold.startMs + 1); + await until(() => !!agent.interrupt?.()); + expect(controller.phase()).toBe('pause'); + const before = agent.messages().length; + await controller.seek(tl.hold.endMs - 1); + await new Promise((r) => setTimeout(r, 30)); + expect(agent.messages().length).toBe(before); + expect(agent.interrupt?.()).toBeTruthy(); + }); + + it('crossing the hold resumes and the audit lands', async () => { + await controller.seek(tl.runs[5].endMs); + await until(() => agent.messages().some((m) => String((m as { content?: unknown }).content).includes('Deleted 3'))); + expect(agent.interrupt?.()).toBeFalsy(); + expect(controller.phase()).toBe('resume'); + }); + + it('rewinding resets and fast-forwards to an earlier point', async () => { + await controller.seek(tl.totalMs); + await until(() => agent.messages().some((m) => String((m as { content?: unknown }).content).includes('a2ui'))); + await controller.seek(tl.runs[0].endMs); + await until(() => agent.messages().length === 2 && !agent.messages().some((m) => String((m as { content?: unknown }).content).includes('a2ui'))); + expect(controller.phase()).toBe('stream'); + }); + + it('coalesces bursts: many seeks in one frame perform each action once', async () => { + const submits: unknown[] = []; + const original = agent.submit.bind(agent); + (agent as { submit: LangGraphAgent['submit'] }).submit = ((input, opts) => { submits.push(input); return original(input, opts); }) as LangGraphAgent['submit']; + await Promise.all([controller.seek(10), controller.seek(20), controller.seek(tl.runs[0].endMs)]); + await until(() => agent.messages().length === 2); + expect(submits.length).toBe(1); + }); +}); +``` + +- [ ] **Step 2: Run to fail** — `npx vitest run src/app/stage/stage-controller` → cannot resolve. + +- [ ] **Step 3: Implement** + +```ts +// examples/chat/angular/src/app/stage/stage-controller.ts +import { computed, signal } from '@angular/core'; +import type { LangGraphAgent } from '@threadplane/langgraph'; +import type { StageRecording, StageRun } from './stage-recording.types'; +import { phaseAt, runsStartedBy, type StagePhase, type StageTimeline } from './stage-timeline'; +import type { StageReplayTransport } from './stage-replay.transport'; + +/** + * Drives the replay agent to any recorded time. + * + * Forward: for each run whose start has been crossed and not yet performed, + * perform its recorded action (submit / resume / reload), then open the + * transport's gate to `t`. Backward: reset the agent and the transport, then + * fast-forward. Seeks are coalesced so a burst inside one frame performs each + * action once, and a seek that arrives while one is in flight is applied after + * it, never concurrently — the agent's submit path is not re-entrant. + */ +export class StageController { + private performed = -1; + private target = 0; + private inFlight: Promise | null = null; + private pending: number | null = null; + private readonly tSig = signal(0); + readonly phase = computed(() => phaseAt(this.timeline, this.tSig())); + readonly applied = this.transport.appliedSignal; + readonly t = this.tSig.asReadonly(); + + constructor( + private readonly agent: LangGraphAgent, + private readonly transport: StageReplayTransport, + private readonly timeline: StageTimeline, + private readonly recording: StageRecording, + ) {} + + seek(t: number): Promise { + const clamped = Math.max(0, Math.min(this.timeline.totalMs, t)); + if (this.inFlight) { this.pending = clamped; return this.inFlight; } + this.inFlight = this.run(clamped).finally(() => { + this.inFlight = null; + if (this.pending !== null) { const next = this.pending; this.pending = null; void this.seek(next); } + }); + return this.inFlight; + } + + private async run(t: number): Promise { + if (t < this.target) await this.reset(); + this.target = t; + this.tSig.set(t); + if (this.performed < 0) this.agent.switchThread(this.recording.threadId); + for (const entry of runsStartedBy(this.timeline, t)) { + if (entry.index <= this.performed) continue; + this.performed = entry.index; + // Open the gate BEFORE the action so the first events flow as soon as the stream opens. + this.transport.seek(t); + await this.perform(entry.run); + } + this.transport.seek(t); + } + + private async reset(): Promise { + this.performed = -1; + this.agent.switchThread(null); + this.transport.reset(); + } + + private async perform(run: StageRun): Promise { + const a = run.action; + switch (a.kind) { + case 'submit': { + const cp = a.checkpointIndex !== undefined ? this.agent.history()[a.checkpointIndex]?.id : undefined; + void this.agent.submit({ message: a.message }, cp ? ({ checkpointId: cp } as never) : undefined); + return; + } + case 'resume': + void this.agent.submit(null, { command: { resume: a.value } } as never); + return; + case 'reload': + // A page reload: the agent is rebuilt from the thread's history. + this.agent.switchThread(null); + this.agent.switchThread(this.recording.threadId); + return; + } + } +} +``` + +Notes for the implementer: `agent.submit` returns a promise that resolves when the run completes, which under the gate may be far in the future; never `await` it. `agent.switchThread(id)` triggers the bridge's `refreshHistory`, which calls `transport.getHistory` and projects the latest snapshot into messages when messages are empty (the reload beat depends on this). If the bridge rejects a submit while a previous run is still open (the gate holds run N open when t sits mid-run and the next run's start is crossed only after N's end, so this should not happen; if it does, the fix is to advance `this.transport.seek(entry.startMs)` before performing so N drains first). If `LangGraphAgent` does not expose `history()` directly, use `agent.langGraphHistory()` and map `.checkpoint.checkpoint_id`. + +- [ ] **Step 4: Run to pass**, commit `feat(examples/chat): StageController drives the agent to any recorded time, with hold and rewind`. + +--- + +### Task 5: Recording transport and the record script + +**Files:** create `stage-recording.transport.ts` (+spec), `stage-script.ts` (+spec). + +- [ ] **Step 1: Failing specs** + +```ts +// examples/chat/angular/src/app/stage/stage-recording.transport.spec.ts +import { describe, expect, it } from 'vitest'; +import type { AgentTransport, StreamEvent } from '@threadplane/langgraph'; +import { StageRecordingTransport } from './stage-recording.transport'; + +function inner(events: StreamEvent[]): AgentTransport { + return { + async *stream() { for (const e of events) yield e; }, + async getHistory() { return [{ values: {} } as never]; }, + }; +} +async function drain(iter: AsyncIterable): Promise { for await (const _ of iter) { /* drain */ } } + +describe('StageRecordingTransport', () => { + it('records each stream as a run tagged with the action the script announced', async () => { + let now = 0; + const t = new StageRecordingTransport(inner([{ type: 'values' } as never, { type: 'values' } as never]), () => (now += 10)); + t.beginRun('stream', { kind: 'submit', message: 'Q1' }); + await drain(t.stream('chat', 'thread-1', {}, new AbortController().signal)); + const rec = t.recording(); + expect(rec.runs).toHaveLength(1); + expect(rec.runs[0]).toMatchObject({ beat: 'stream', action: { kind: 'submit', message: 'Q1' } }); + expect(rec.runs[0].events.map((e) => e.tMs)).toEqual([10, 20]); + }); + it('records a reload as a run with no events, and history responses with the run count', async () => { + const t = new StageRecordingTransport(inner([])); + t.beginRun('stream', { kind: 'submit', message: 'Q1' }); + await drain(t.stream('chat', 'thread-1', {}, new AbortController().signal)); + t.beginRun('persist', { kind: 'reload' }); + t.markReload(); + await t.getHistory('thread-1', new AbortController().signal); + const rec = t.recording(); + expect(rec.runs[1]).toMatchObject({ beat: 'persist', action: { kind: 'reload' }, events: [] }); + expect(rec.histories).toEqual([{ afterRun: 2, states: [{ values: {} }] }]); + }); + it('captures the thread id the inner transport reports', () => { + const t = new StageRecordingTransport(inner([])); + t.onThreadId('thread-9'); + expect(t.recording().threadId).toBe('thread-9'); + }); +}); +``` + +```ts +// examples/chat/angular/src/app/stage/stage-script.spec.ts +import { describe, expect, it } from 'vitest'; +import { StageScript, STAGE_PROMPTS, type StageScriptHost } from './stage-script'; + +describe('StageScript', () => { + it('walks the four beats in order, announcing each run\'s action before performing it', async () => { + const log: string[] = []; + let interrupt = false; + let loading = false; + const host: StageScriptHost = { + beginRun: (beat, action) => log.push(`begin:${beat}:${action.kind}`), + submit: async (message, checkpointIndex) => { log.push(`submit:${message}${checkpointIndex !== undefined ? `@${checkpointIndex}` : ''}`); loading = true; setTimeout(() => { loading = false; interrupt = message === STAGE_PROMPTS.approve; }, 1); }, + resume: async (value) => { log.push(`resume:${value}`); interrupt = false; }, + reload: async () => { log.push('reload'); }, + isRunning: () => loading, + hasInterrupt: () => interrupt, + forkIndex: () => 0, + sleep: () => Promise.resolve(), + }; + await new StageScript(host).run(); + expect(log).toEqual([ + 'begin:stream:submit', `submit:${STAGE_PROMPTS.stream}`, + 'begin:persist:reload', 'reload', + 'begin:persist:submit', `submit:${STAGE_PROMPTS.shorter}`, + 'begin:persist:submit', `submit:${STAGE_PROMPTS.fork}@0`, + 'begin:approve:submit', `submit:${STAGE_PROMPTS.approve}`, + 'begin:approve:resume', 'resume:approved', + 'begin:render:submit', `submit:${STAGE_PROMPTS.render}`, + ]); + }); +}); +``` + +- [ ] **Step 2: Run to fail.** + +- [ ] **Step 3: Implement the recording transport** + +```ts +// examples/chat/angular/src/app/stage/stage-recording.transport.ts +import type { AgentQueueEntry, AgentTransport, LangGraphSubmitOptions, StreamEvent } from '@threadplane/langgraph'; +import type { ThreadState } from '@langchain/langgraph-sdk'; +import type { RecordedEvent, StageAction, StageBeat, StageHistorySnapshot, StageRecording, StageRun } from './stage-recording.types'; + +declare global { + interface Window { + /** Set by StageRecordingTransport in record mode; read by the record script. */ + __stageRecording?: StageRecording; + } +} + +/** + * Wraps the real transport in record mode. The script announces each run's + * action with `beginRun()` before performing it; the next `stream()` call + * becomes that run. A reload has no stream, so the script calls `markReload()` + * to close it as an empty run. Every `getHistory()` answer is kept with the + * number of runs recorded so far, which is what the replay keys on. + */ +export class StageRecordingTransport implements AgentTransport { + private runs: StageRun[] = []; + private histories: StageHistorySnapshot[] = []; + private pending: { beat: StageBeat; action: StageAction } | null = null; + private threadId = ''; + private readonly recordedAt = new Date().toISOString(); + + constructor(private readonly inner: AgentTransport, private readonly now: () => number = () => performance.now()) {} + + beginRun(beat: StageBeat, action: StageAction): void { this.pending = { beat, action }; } + markReload(): void { + const p = this.pending; this.pending = null; + if (!p || p.action.kind !== 'reload') throw new Error('markReload() needs a pending reload action'); + this.runs.push({ beat: p.beat, action: p.action, events: [] }); + this.publish(); + } + onThreadId(id: string): void { this.threadId = id; this.publish(); } + recording(): StageRecording { + return { version: 2, recordedAt: this.recordedAt, threadId: this.threadId, runs: [...this.runs], histories: [...this.histories] }; + } + + async *stream(assistantId: string, threadId: string | null, payload: unknown, signal: AbortSignal, options?: LangGraphSubmitOptions): AsyncIterable { + const p = this.pending; this.pending = null; + if (!p) throw new Error('stream() without beginRun(): the script must announce the action first'); + const events: RecordedEvent[] = []; + const run: StageRun = { beat: p.beat, action: p.action, events }; + this.runs.push(run); + const start = this.now(); + for await (const event of this.inner.stream(assistantId, threadId, payload, signal, options)) { + events.push({ tMs: Math.round(this.now() - start), event }); + this.publish(); + yield event; + } + this.publish(); + } + async getHistory(threadId: string, signal: AbortSignal): Promise { + const states = this.inner.getHistory ? await this.inner.getHistory(threadId, signal) : []; + this.histories.push({ afterRun: this.runs.length, states }); + this.publish(); + return states; + } + joinStream(threadId: string, runId: string, last: string | undefined, signal: AbortSignal): AsyncIterable { + return this.inner.joinStream ? this.inner.joinStream(threadId, runId, last, signal) : (async function* () { yield* []; })(); + } + createQueuedRun(a: string, threadId: string, payload: unknown, signal: AbortSignal, options?: LangGraphSubmitOptions): Promise { + if (!this.inner.createQueuedRun) throw new Error('inner transport cannot queue runs'); + return this.inner.createQueuedRun(a, threadId, payload, signal, options); + } + cancelRun(threadId: string, runId: string, signal: AbortSignal): Promise { + return this.inner.cancelRun ? this.inner.cancelRun(threadId, runId, signal) : Promise.resolve(); + } + updateState(threadId: string, values: Record, signal: AbortSignal, options?: { asNode?: string }): Promise { + return this.inner.updateState ? this.inner.updateState(threadId, values, signal, options) : Promise.resolve(); + } + private publish(): void { if (typeof window !== 'undefined') window.__stageRecording = this.recording(); } +} +``` + +- [ ] **Step 4: Implement the script** + +```ts +// examples/chat/angular/src/app/stage/stage-script.ts +import type { StageAction, StageBeat } from './stage-recording.types'; + +/** + * The four beats, verbatim. The approve and render prompts are the hero's, so + * the stage shows the same run the hero teases; the stream prompt is the demo's + * search-and-cite chip; the persist prompts are short on purpose. + */ +export const STAGE_PROMPTS = { + stream: 'Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.', + shorter: 'Shorter, please.', + fork: 'Make it a haiku instead.', + approve: 'Clean up our old database backups, anything older than 90 days.', + render: 'Show me a contact form with fields for name, email address, subject, and a multi-line message, plus a Send button.', +} as const; + +export interface StageScriptHost { + beginRun(beat: StageBeat, action: StageAction): void; + submit(message: string, checkpointIndex?: number): Promise; + resume(value: string): Promise; + reload(): Promise; + isRunning(): boolean; + hasInterrupt(): boolean; + /** Index into history() of the checkpoint to fork from: the first answer's. */ + forkIndex(): number; + sleep(ms: number): Promise; +} + +export const SCRIPT_WAIT_TIMEOUT_MS = 120_000; +const POLL_MS = 50; + +/** Record-mode driver: performs the beats against the live agent, announcing each run first. */ +export class StageScript { + constructor(private readonly host: StageScriptHost) {} + + async run(): Promise { + await this.turn('stream', STAGE_PROMPTS.stream); + this.host.beginRun('persist', { kind: 'reload' }); + await this.host.reload(); + await this.turn('persist', STAGE_PROMPTS.shorter); + const fork = this.host.forkIndex(); + await this.turn('persist', STAGE_PROMPTS.fork, fork); + this.host.beginRun('approve', { kind: 'submit', message: STAGE_PROMPTS.approve }); + await this.host.submit(STAGE_PROMPTS.approve); + await this.waitFor(() => this.host.hasInterrupt()); + this.host.beginRun('approve', { kind: 'resume', value: 'approved' }); + await this.host.resume('approved'); + await this.waitFor(() => !this.host.isRunning() && !this.host.hasInterrupt()); + await this.turn('render', STAGE_PROMPTS.render); + } + + private async turn(beat: StageBeat, message: string, checkpointIndex?: number): Promise { + this.host.beginRun(beat, checkpointIndex !== undefined ? { kind: 'submit', message, checkpointIndex } : { kind: 'submit', message }); + await this.host.submit(message, checkpointIndex); + await this.waitFor(() => !this.host.isRunning()); + } + + private async waitFor(pred: () => boolean): Promise { + let elapsed = 0; + while (!pred()) { + if (elapsed >= SCRIPT_WAIT_TIMEOUT_MS) throw new Error('stage script timed out waiting for the agent'); + await this.host.sleep(POLL_MS); + elapsed += POLL_MS; + } + } +} +``` + +The `isRunning()` in the spec host flips false on a timer, so `waitFor` must poll through `sleep`, which the spec resolves immediately; the `until`-style loop above handles that because `elapsed` only counts polls. + +- [ ] **Step 5: Run both specs to pass**, commit `feat(examples/chat): stage record-mode transport and the four-beat script`. + +--- + +### Task 6: Bridge, route component, route + +**Files:** create `stage-bridge.ts` (+spec), `stage-mode.component.ts` (+spec); modify `src/app/app.routes.ts`. + +- [ ] **Step 1: Failing specs** + +```ts +// examples/chat/angular/src/app/stage/stage-bridge.spec.ts +import { describe, expect, it, vi } from 'vitest'; +import { createStageBridge, STAGE_MESSAGE_TYPE } from './stage-bridge'; + +function env(referrer = 'https://threadplane.ai/') { + const listeners: ((e: MessageEvent) => void)[] = []; + const parent = { postMessage: vi.fn() } as unknown as Window; + const self = { + addEventListener: (_: string, cb: (e: MessageEvent) => void) => listeners.push(cb), + removeEventListener: vi.fn(), + } as unknown as Window; + return { referrer, parent, self, fire: (data: unknown, origin = 'https://threadplane.ai', source: unknown = parent) => listeners.forEach((l) => l({ data, origin, source } as MessageEvent)) }; +} + +describe('createStageBridge', () => { + it('delivers seek targets from an allowlisted parent and ignores others', () => { + const e = env(); + const bridge = createStageBridge({ referrer: e.referrer, parent: e.parent, self: e.self }); + const seen: number[] = []; + bridge.onSeek((t) => seen.push(t)); + e.fire({ type: STAGE_MESSAGE_TYPE, t: 1200 }); + e.fire({ type: STAGE_MESSAGE_TYPE, t: 5 }, 'https://evil.example'); + e.fire({ type: 'other', t: 7 }); + e.fire({ type: STAGE_MESSAGE_TYPE, t: 'nope' }); + expect(seen).toEqual([1200]); + }); + it('posts ready and applied state to the parent only', () => { + const e = env(); + const bridge = createStageBridge({ referrer: e.referrer, parent: e.parent, self: e.self }); + bridge.postReady({ totalMs: 9000, beats: [{ beat: 'stream', startMs: 0, endMs: 1000 }] }); + bridge.postState({ applied: 3, phase: 'stream', t: 120 }); + expect((e.parent.postMessage as ReturnType).mock.calls.map((c) => c[0])).toEqual([ + { type: STAGE_MESSAGE_TYPE, ready: true, totalMs: 9000, beats: [{ beat: 'stream', startMs: 0, endMs: 1000 }] }, + { type: STAGE_MESSAGE_TYPE, applied: 3, phase: 'stream', t: 120 }, + ]); + }); + it('posts nothing when not embedded', () => { + const e = env(); + const bridge = createStageBridge({ referrer: '', parent: e.self, self: e.self }); + bridge.postState({ applied: 1, phase: 'stream', t: 0 }); + expect(e.parent.postMessage).not.toHaveBeenCalled(); + }); +}); +``` + +```ts +// examples/chat/angular/src/app/stage/stage-mode.component.spec.ts +import { describe, expect, it, beforeEach } from 'vitest'; +import { TestBed, type ComponentFixture } from '@angular/core/testing'; +import { provideRouter } from '@angular/router'; +import { StageMode } from './stage-mode.component'; +import { StageReplayTransport } from './stage-replay.transport'; +import { MINIMAL } from './stage-recording.types.spec'; + +describe('StageMode', () => { + let fx: ComponentFixture; + beforeEach(async () => { + StageMode.disableAutoBootForTests(); + TestBed.configureTestingModule({ imports: [StageMode], providers: [provideRouter([])] }); + TestBed.overrideComponent(StageMode, { set: { providers: StageMode.providersForTest(new StageReplayTransport(async () => MINIMAL)) } }); + fx = TestBed.createComponent(StageMode); + fx.detectChanges(); + await fx.whenStable(); + }); + it('renders the chat, the devtools region, and an inert interrupt panel host', () => { + const el = fx.nativeElement as HTMLElement; + expect(el.querySelector('chat')).toBeTruthy(); + expect(el.querySelector('chat-debug')).toBeTruthy(); + expect(el.querySelector('[data-stage-interrupt]')).toBeTruthy(); + expect(el.querySelector('[data-stage-pill]')?.textContent).toMatch(/recorded LangGraph run/i); + }); + it('exposes the timeline for recorders and seeks to ?t= on boot', async () => { + await fx.componentInstance.boot(new URLSearchParams('t=25')); + expect(fx.componentInstance.timeline()?.totalMs).toBeGreaterThan(0); + expect(fx.componentInstance.controller()?.t()).toBe(25); + }); +}); +``` + +- [ ] **Step 2: Run to fail.** + +- [ ] **Step 3: Implement the bridge** + +```ts +// examples/chat/angular/src/app/stage/stage-bridge.ts +import { isAllowedParentOrigin } from '../hero/hero-bridge'; +import type { StagePhase, TimelineBeat } from './stage-timeline'; + +export const STAGE_MESSAGE_TYPE = 'tplane-stage'; + +export interface StageReady { totalMs: number; beats: readonly TimelineBeat[]; } +export interface StageState { applied: number; phase: StagePhase; t: number; } + +export interface StageBridge { + onSeek(cb: (t: number) => void): () => void; + postReady(ready: StageReady): void; + postState(state: StageState): void; +} + +interface BridgeEnv { referrer: string; parent: Window; self: Window; } + +function originOf(url: string): string | null { try { return new URL(url).origin; } catch { return null; } } + +/** + * The parent page owns scroll and posts `{ type: 'tplane-stage', t }`; the + * frame answers with `{ ready, totalMs, beats }` once and `{ applied, phase, t }` + * whenever its applied state changes. Same origin allowlist as the hero. + */ +export function createStageBridge(env: BridgeEnv): StageBridge { + const fromReferrer = originOf(env.referrer); + let parentOrigin: string | null = fromReferrer !== null && isAllowedParentOrigin(fromReferrer) ? fromReferrer : null; + const embedded = env.parent !== env.self; + const post = (msg: Record) => { + if (!embedded || parentOrigin === null) return; + env.parent.postMessage({ type: STAGE_MESSAGE_TYPE, ...msg }, parentOrigin); + }; + return { + onSeek(cb) { + const handler = (e: MessageEvent) => { + if (e.source !== env.parent) return; + if (!isAllowedParentOrigin(e.origin)) return; + const d = e.data as { type?: string; t?: unknown } | null; + if (!d || d.type !== STAGE_MESSAGE_TYPE || typeof d.t !== 'number' || !Number.isFinite(d.t)) return; + if (parentOrigin === null) parentOrigin = e.origin; + cb(d.t); + }; + env.self.addEventListener('message', handler); + return () => env.self.removeEventListener('message', handler); + }, + postReady(ready) { post({ ready: true, totalMs: ready.totalMs, beats: ready.beats }); }, + postState(state) { post({ applied: state.applied, phase: state.phase, t: state.t }); }, + }; +} + +export function browserStageBridge(): StageBridge { + return createStageBridge({ referrer: document.referrer, parent: window.parent, self: window }); +} +``` + +`isAllowedParentOrigin` is already exported from `../hero/hero-bridge.ts`. + +- [ ] **Step 4: Implement the component** + +```ts +// examples/chat/angular/src/app/stage/stage-mode.component.ts +import { + ChangeDetectionStrategy, Component, DestroyRef, EnvironmentInjector, InjectionToken, + afterNextRender, createEnvironmentInjector, effect, inject, signal, type Provider, type WritableSignal, +} from '@angular/core'; +import { ChatComponent, ChatInterruptPanelComponent, createAgentRef, type AgentRef } from '@threadplane/chat'; +import { ChatDebugComponent } from '@threadplane/chat/debug'; +import { FetchStreamTransport, injectAgent, provideAgent, type AgentConfig, type LangGraphAgent } from '@threadplane/langgraph'; +import { environment } from '../../environments/environment'; +import { demoViews } from '../demo-views'; +import { StageController } from './stage-controller'; +import { browserStageBridge, type StageBridge } from './stage-bridge'; +import { StageRecordingTransport } from './stage-recording.transport'; +import { StageReplayTransport } from './stage-replay.transport'; +import { StageScript } from './stage-script'; +import type { StageTimeline } from './stage-timeline'; + +export const STAGE_REF = createAgentRef>('stage'); +const STAGE_THREAD_ID = new InjectionToken>('STAGE_THREAD_ID'); +const STAGE_RECORDING = new InjectionToken('STAGE_RECORDING'); + +/** Same filter the demo shell and the hero apply: only generate's tokens are transcript. */ +const TRANSCRIPT_NODE_NAMES = ['generate']; + +function isRecordMode(): boolean { + if (environment.production || typeof location === 'undefined') return false; + return new URLSearchParams(location.search).get('record') === '1'; +} + +function scopedAgent(ref: AgentRef>, config: AgentConfig): LangGraphAgent { + const injector = createEnvironmentInjector(provideAgent(ref, config), inject(EnvironmentInjector)); + inject(DestroyRef).onDestroy(() => injector.destroy()); + return injector.get(ref.token) as LangGraphAgent; +} + +function stageProviders(replay?: StageReplayTransport): Provider[] { + return [ + { provide: StageReplayTransport, useFactory: () => replay ?? new StageReplayTransport() }, + { provide: STAGE_THREAD_ID, useFactory: () => signal(null) }, + { + provide: STAGE_RECORDING, + useFactory: () => { + if (!isRecordMode()) return null; + const threadId = inject(STAGE_THREAD_ID); + const rec = new StageRecordingTransport(new FetchStreamTransport(environment.langGraphApiUrl, (id) => { threadId.set(id); rec.onThreadId(id); })); + return rec; + }, + }, + { + provide: STAGE_REF.token, + useFactory: () => { + const recording = inject(STAGE_RECORDING); + const threadId = inject(STAGE_THREAD_ID); + return recording + ? scopedAgent(STAGE_REF, { apiUrl: environment.langGraphApiUrl, assistantId: environment.assistantId, threadId, onThreadId: (id) => threadId.set(id), transport: recording, transcriptNodeNames: TRANSCRIPT_NODE_NAMES }) + : scopedAgent(STAGE_REF, { assistantId: 'stage-replay', threadId, transport: inject(StageReplayTransport), transcriptNodeNames: TRANSCRIPT_NODE_NAMES }); + }, + }, + ]; +} + +declare global { interface Window { __stageTimeline?: StageTimeline; } } + +/** + * The stage (live-stage spec §4): the real chat beside the real devtools, + * replaying one recorded run to whatever time the embedder asks for. No live + * mode, no takeover; `?record=1` (non-production) runs the four-beat script + * against the live backend instead and publishes the recording on `window`. + */ +@Component({ + selector: 'stage-mode', + standalone: true, + imports: [ChatComponent, ChatInterruptPanelComponent, ChatDebugComponent], + changeDetection: ChangeDetectionStrategy.OnPush, + providers: stageProviders(), + template: ` +
+
+ demo.threadplane.ai + + @if (recording) { Recording a live LangGraph run } @else { Replaying a recorded LangGraph run } + + Open the live demo +
+
+
+
+ @if (agent.interrupt?.()) { + + } +
+ +
+ +
+
+ `, + styles: [` + :host { display: block; height: 100%; } + .stage { display: flex; flex-direction: column; height: 100%; } + .stage__bar { display: flex; align-items: center; gap: 12px; padding: 6px 12px; font: 12px/1.3 system-ui, sans-serif; border-bottom: 1px solid rgba(128,128,128,.25); } + .stage__url { opacity: .6; } + .stage__pill { display: inline-flex; align-items: center; padding: 2px 9px; border-radius: 999px; border: 1px solid #b5731a; color: #b5731a; } + .stage__link { margin-left: auto; color: inherit; font: inherit; } + /* The devtools panel is position: fixed and docks to the frame's right edge; + the chat column leaves it that room. --stage-devtools-width is measured + in Task 6 Step 6 against the panel's real width and set once here. */ + .stage__surface { position: relative; flex: 1; min-height: 0; display: flex; } + .stage__chat { flex: 1; min-width: 0; display: flex; flex-direction: column; padding-right: var(--stage-devtools-width, 420px); } + .stage__chat > chat { flex: 1; min-height: 0; } + .stage__interrupt { padding: 8px 12px 0; } + /* Replay: the panel is a picture of a decision, not a control. Record mode keeps it live. */ + .stage__interrupt[data-inert="true"] { pointer-events: none; } + `], +}) +export class StageMode { + static providersForTest(replay?: StageReplayTransport): Provider[] { return stageProviders(replay); } + static autoBoot = true; + static disableAutoBootForTests(): void { StageMode.autoBoot = false; } + static enableAutoBoot(): void { StageMode.autoBoot = true; } + + private readonly destroyRef = inject(DestroyRef); + private readonly replayTransport = inject(StageReplayTransport); + protected readonly recording = inject(STAGE_RECORDING); + protected readonly agent = injectAgent(STAGE_REF) as LangGraphAgent; + protected readonly catalog = demoViews(); + readonly timeline = signal(null); + readonly controller = signal(null); + /** TEST SEAM: replaced by the spec; browser bridge by default. */ + bridge: StageBridge = typeof window === 'undefined' ? { onSeek: () => () => undefined, postReady: () => undefined, postState: () => undefined } : browserStageBridge(); + private frame: number | null = null; + private pendingT: number | null = null; + + constructor() { + afterNextRender(() => { if (StageMode.autoBoot) void this.boot(new URLSearchParams(location.search)); }); + effect(() => { + const c = this.controller(); + if (!c) return; + this.bridge.postState({ applied: c.applied(), phase: c.phase(), t: c.t() }); + }); + } + + async boot(params: URLSearchParams): Promise { + if (this.recording) { await this.record(); return; } + const tl = await this.replayTransport.ready(); + this.timeline.set(tl); + if (typeof window !== 'undefined') window.__stageTimeline = tl; + const controller = new StageController(this.agent, this.replayTransport, tl, await this.replayTransport['getRecording']()); + this.controller.set(controller); + this.bridge.postReady({ totalMs: tl.totalMs, beats: tl.beats }); + const off = this.bridge.onSeek((t) => this.requestSeek(t)); + this.destroyRef.onDestroy(off); + const t = Number(params.get('t')); + await controller.seek(Number.isFinite(t) ? t : 0); + } + + /** One seek per animation frame; the last target wins. */ + private requestSeek(t: number): void { + this.pendingT = t; + if (this.frame !== null) return; + this.frame = requestAnimationFrame(() => { + this.frame = null; + const target = this.pendingT; this.pendingT = null; + if (target !== null) void this.controller()?.seek(target); + }); + } + + protected async onInterruptAction(action: 'accept' | 'edit' | 'respond' | 'ignore'): Promise { + if (!this.recording) return; + await this.agent.submit(null, { command: { resume: action === 'accept' ? 'approved' : 'denied' } } as never); + } + + private async record(): Promise { + const rec = this.recording!; + const agent = this.agent; + const script = new StageScript({ + beginRun: (beat, action) => rec.beginRun(beat, action), + submit: async (message, checkpointIndex) => { + const cp = checkpointIndex !== undefined ? agent.history()[checkpointIndex]?.id : undefined; + void agent.submit({ message }, cp ? ({ checkpointId: cp } as never) : undefined); + }, + resume: async (value) => { void agent.submit(null, { command: { resume: value } } as never); }, + reload: async () => { + const id = rec.recording().threadId; + agent.switchThread(null); + agent.switchThread(id); + await new Promise((resolve) => { const tick = () => (agent.messages().length > 0 && !agent.isThreadLoading() ? resolve() : setTimeout(tick, 50)); tick(); }); + rec.markReload(); + }, + isRunning: () => agent.isLoading(), + hasInterrupt: () => !!agent.interrupt?.(), + forkIndex: () => { + // The first answer's checkpoint: history() is newest-first, so the one whose values hold exactly two messages. + const idx = agent.history().findIndex((cp) => (((cp as { values?: { messages?: unknown[] } }).values?.messages?.length) ?? 0) === 2); + return idx < 0 ? agent.history().length - 1 : idx; + }, + sleep: (ms) => new Promise((r) => setTimeout(r, ms)), + }); + await script.run(); + } +} +``` + +Replace `await this.replayTransport['getRecording']()` with a public `recording()` accessor on `StageReplayTransport` (add `async recordingData(): Promise { return this.getRecording(); }` in Task 3's file) — the bracket access is a placeholder for that method; do not ship it. + +Add the route in `app.routes.ts` after `hero`: + +```ts + { + path: 'stage', + pathMatch: 'full', + loadComponent: () => import('./stage/stage-mode.component').then((m) => m.StageMode), + }, +``` + +- [ ] **Step 5: Run the specs to pass**; `npx nx lint examples-chat-angular` zero errors; `npx nx build examples-chat-angular --configuration=production` succeeds (the debug entry point adds to the bundle; note the initial-bundle warning delta versus main and report it). + +- [ ] **Step 6: Measure the devtools width** + +Start the dev server (`npx nx serve examples-chat-angular --port 4200`), open `http://localhost:4200/stage?t=0` (replay needs no backend, but the recording does not exist until Task 7 — for this measurement, temporarily copy `hero-replay.json` is NOT valid; instead open `/stage?record=1` is also wrong without a backend. So: measure on `/embed` with the devtools opened from the sidebar launcher, or read the panel's width from `libs/chat/debug/.../chat-debug.component.ts` styles (`.panel--right { width: … }`).) Set `--stage-devtools-width` in the component to that width plus 16px and record the number in the comment. Stop the server. + +- [ ] **Step 7: Commit** `feat(examples/chat): /stage route — real chat beside real devtools, seekable by ?t= and by postMessage`. + +--- + +### Task 7: Record the fixture live; pin it + +**Files:** create `e2e/record-stage-fixture.record.ts`, `e2e/record-stage-live.config.ts`; produce `public/stage-replay.json`; create `src/app/stage/stage-replay.fixture.spec.ts`. + +- [ ] **Step 1: The fixture spec (fails until the recording exists)** + +```ts +// examples/chat/angular/src/app/stage/stage-replay.fixture.spec.ts +/// +import { describe, expect, it } from 'vitest'; +import { readFileSync } from 'node:fs'; +import { resolve } from 'node:path'; +import { validateStageRecording } from './stage-recording.types'; +import { buildTimeline } from './stage-timeline'; + +const FIXTURE = resolve(__dirname, '../../../public/stage-replay.json'); + +describe('stage-replay.json', () => { + const rec = validateStageRecording(JSON.parse(readFileSync(FIXTURE, 'utf8'))); + const tl = buildTimeline(rec); + const json = (i: number) => JSON.stringify(rec.runs[i].events); + const run = (beat: string, kind: string) => rec.runs.findIndex((r) => r.beat === beat && r.action.kind === kind); + + it('walks stream, persist, approve, render', () => { + expect(tl.beats.map((b) => b.beat)).toEqual(['stream', 'persist', 'approve', 'render']); + }); + it('the stream beat calls search_documents and attaches citations', () => { + expect(json(run('stream', 'submit'))).toMatch(/"name":\s*"search_documents"/); + expect(json(run('stream', 'submit'))).toMatch(/citations/); + }); + it('the persist beat has a reload with a recorded history and a fork', () => { + expect(rec.histories.length).toBeGreaterThan(0); + expect(rec.runs.some((r) => r.action.kind === 'submit' && r.action.checkpointIndex !== undefined)).toBe(true); + }); + it('the approve beat lists, pauses inside delete_backups, and resumes with an audit', () => { + const a = json(run('approve', 'submit')); + expect(a).toMatch(/"name":\s*"list_backups"/); + expect(a).toMatch(/"name":\s*"delete_backups"/); + expect(a).not.toMatch(/"name":\s*"request_approval"/); + expect(a).toMatch(/approval_request/); + expect(json(run('approve', 'resume'))).toMatch(/deleted\\":\s*\[/); + }); + it('the render beat carries an A2UI payload', () => { + expect(json(run('render', 'submit'))).toMatch(/a2ui_JSON/); + }); + it('never contains an API key or bearer token', () => { + expect(JSON.stringify(rec)).not.toMatch(/sk-[A-Za-z0-9]{10,}|Bearer /); + }); +}); +``` + +The resume-audit regex targets the escaped JSON string inside the stringified events (`\"deleted\": [`); if it does not match, parse the ToolMessage content as the hero fixture spec does and assert `deleted` is a non-empty array. + +- [ ] **Step 2: Recorder and config** + +```ts +// examples/chat/angular/e2e/record-stage-fixture.record.ts +/** + * NOT a test. Drives /stage?record=1 (the four-beat script against the live + * agent, wrapped in StageRecordingTransport) and writes public/stage-replay.json. + * Run through record-stage-live.config.ts with the backend and the dev server up. + */ +import { test, expect } from '@playwright/test'; +import { writeFileSync } from 'node:fs'; +import { resolve } from 'node:path'; + +const OUT = resolve(__dirname, '../public/stage-replay.json'); +/* eslint-disable @typescript-eslint/no-explicit-any */ + +test('record stage fixture', async ({ page }) => { + page.on('console', (m) => { if (m.type() === 'error') console.log('[browser]', m.text()); }); + await page.goto('/stage?record=1'); + await expect.poll(async () => page.evaluate(() => (window as any).__stageRecording?.runs.length ?? 0), { timeout: 400_000 }).toBe(7); + let last = -1; + for (let i = 0; i < 40; i++) { + const n = await page.evaluate(() => (window as any).__stageRecording?.runs.at(-1)?.events.length ?? 0); + if (n > 0 && n === last) break; + last = n; + await page.waitForTimeout(3000); + } + const rec = await page.evaluate(() => (window as any).__stageRecording); + expect(rec.runs.map((r: any) => `${r.beat}:${r.action.kind}`)).toEqual([ + 'stream:submit', 'persist:reload', 'persist:submit', 'persist:submit', 'approve:submit', 'approve:resume', 'render:submit', + ]); + writeFileSync(OUT, JSON.stringify(rec, null, 2) + '\n'); + console.log(`wrote ${OUT}`); +}); +``` + +`e2e/record-stage-live.config.ts`: copy `record-hero-live.config.ts`, change `testMatch` to `'**/record-stage-fixture.record.ts'` and the header comment's commands to this file's name. It starts nothing. + +- [ ] **Step 3: Record** + +```bash +cd examples/chat/python && export OPENAI_API_KEY=$(grep -E '^OPENAI_API_KEY=' /Users/blove/repos/angular-agent-framework/.env | cut -d= -f2-) && uv run langgraph dev --port 2024 --no-browser +``` +```bash +npx nx serve examples-chat-angular --port 4200 +``` +```bash +npx playwright test -c examples/chat/angular/e2e/record-stage-live.config.ts record-stage-fixture +``` + +Take several takes; keep one where the fixture spec passes AND the approve run has exactly one `delete_backups` call (no refused first attempt) AND the resume answer is under 1,400 characters. Never edit the prose. Then `cd examples/chat/angular && npx vitest run src/app/stage/stage-replay.fixture` → PASS. Stop both servers before any e2e. + +- [ ] **Step 4: Commit** `feat(examples/chat): record the four-beat stage fixture live` (the JSON, the recorder, the config, the fixture spec). + +--- + +### Task 8: Stills recorder and the replay e2e + +**Files:** create `e2e/record-stage.config.ts`, `e2e/record-stage-stills.record.ts`, `e2e/stage.spec.ts`. + +- [ ] **Step 1: e2e on the committed replay** + +```ts +// examples/chat/angular/e2e/stage.spec.ts +import { test, expect } from '@playwright/test'; +import { attachBrowserHygiene } from './test-helpers'; + +/* eslint-disable @typescript-eslint/no-explicit-any */ +async function timeline(page: import('@playwright/test').Page) { + await page.goto('/stage?t=0'); + await expect.poll(() => page.evaluate(() => !!(window as any).__stageTimeline), { timeout: 30_000 }).toBe(true); + return page.evaluate(() => (window as any).__stageTimeline); +} + +test.describe('stage replay', () => { + test.describe.configure({ timeout: 120_000 }); + + test('renders the chat beside the devtools and seeks to the approve hold', async ({ page }) => { + const hygiene = attachBrowserHygiene(page); + const tl = await timeline(page); + await expect(page.getByRole('region', { name: 'Chat devtools' })).toBeVisible(); + await page.goto(`/stage?t=${tl.hold.startMs + 1}`); + await expect(page.locator('chat-interrupt-panel')).toBeAttached({ timeout: 60_000 }); + await expect(page.locator('app-backup-table [data-state="rows"]')).toBeAttached(); + expect(await page.locator('[data-stage-interrupt]').evaluate((el) => getComputedStyle(el).pointerEvents)).toBe('none'); + expect(hygiene.consoleErrors).toEqual([]); + }); + + test('the end of the recording mounts the generated form and the devtools shows the thread', async ({ page }) => { + const hygiene = attachBrowserHygiene(page); + const tl = await timeline(page); + await page.goto(`/stage?t=${tl.totalMs}`); + await expect(page.locator('a2ui-surface').first()).toBeAttached({ timeout: 90_000 }); + await expect(page.locator('chat-interrupt-panel')).toHaveCount(0); + await page.getByRole('tab', { name: 'Timeline' }).click(); + await expect(page.getByRole('region', { name: 'Chat devtools' })).toContainText(/checkpoint/i); + expect(hygiene.consoleErrors).toEqual([]); + }); +}); +``` + +Run: `npx playwright test -c examples/chat/angular/e2e/playwright.config.ts stage.spec.ts hero.spec.ts` (aimock-backed servers; replay needs no model). Expected: pass. Fix whatever fails in the component (not the recording). + +- [ ] **Step 2: Stills** + +`e2e/record-stage.config.ts`: copy `record-hero.config.ts` (aimock-backed global setup), `testMatch: '**/record-stage-stills.record.ts'`, header comment explaining it produces the website's fallback stills. + +```ts +// examples/chat/angular/e2e/record-stage-stills.record.ts +/** + * NOT a test. Captures one still per beat from the committed stage replay, at + * desktop and phone widths, for the website's non-pinned fallback (spec §8). + * npx playwright test --config examples/chat/angular/e2e/record-stage.config.ts record-stage-stills + */ +import { test } from '@playwright/test'; +import { resolve } from 'node:path'; +import sharp from 'sharp'; + +/* eslint-disable @typescript-eslint/no-explicit-any */ +const OUT_DIR = resolve(__dirname, '../../../../apps/website/public/screenshots'); +const SIZES = [{ suffix: '', width: 1200, height: 720, ship: 1200 }, { suffix: '-mobile', width: 390, height: 650, ship: 585 }]; + +test('capture stage stills', async ({ page }) => { + await page.goto('/stage?t=0'); + await page.waitForFunction(() => !!(window as any).__stageTimeline); + const tl = await page.evaluate(() => (window as any).__stageTimeline); + const settle: Record = { + stream: tl.beats[0].endMs, + persist: tl.beats[1].endMs, + approve: tl.hold.startMs + Math.round((tl.hold.endMs - tl.hold.startMs) / 2), + render: tl.totalMs, + }; + for (const size of SIZES) { + await page.setViewportSize({ width: size.width, height: size.height }); + for (const [beat, t] of Object.entries(settle)) { + await page.goto(`/stage?t=${t}`); + await page.waitForFunction((target) => (window as any).__stageApplied?.t === target, t, { timeout: 60_000 }); + await page.waitForTimeout(400); + const png = await page.screenshot({ type: 'png', fullPage: false }); + await sharp(png).resize({ width: size.ship }).webp({ quality: 60, effort: 6 }).toFile(resolve(OUT_DIR, `stage-${beat}${size.suffix}.webp`)); + } + } +}); +``` + +For the `__stageApplied` wait, have `StageMode` also set `window.__stageApplied = { applied, phase, t }` in the same effect that posts state (add it in Task 6 if you are reading ahead; otherwise add it now with a one-line spec assertion). + +Run the recorder; open each of the eight files and check: the approve still shows the panel and the table; the render still shows the form; nothing is sliced. Each file must be under 120 KB; if not, lower quality to 50. + +- [ ] **Step 3: Commit** `feat(examples/chat): stage replay e2e and the still recorder for the website fallback` (include the eight webp files under `apps/website/public/screenshots/`). + +--- + +### Task 9: Verification and PR + +- [ ] **Step 1: Everything** + +```bash +cd examples/chat/angular && npx vitest run +npx nx lint examples-chat-angular 2>&1 | sed 's/\x1b\[[0-9;]*m//g' | grep -E "problems|error " +npx nx build examples-chat-angular --configuration=production 2>&1 | grep -E "Initial total|exceeded|Successfully" +npx playwright test -c examples/chat/angular/e2e/playwright.config.ts stage.spec.ts hero.spec.ts interrupt-approval.spec.ts +cd apps/website && npx vitest run src/lib/section-media.spec.ts +``` + +All green. Report the production bundle delta (the `@threadplane/chat/debug` entry is lazy through the route, so the initial bundle should not grow; if it does, say by how much). + +- [ ] **Step 2: PR** + +```bash +git push -u origin blove/stage-route +gh pr create --title "feat(examples/chat): /stage — the real chat beside the real devtools, seekable to any recorded time (live-stage plan 2 of 3)" --body-file - <<'EOF' +## Why + +Plan 2 of the homepage live stage (`docs/superpowers/specs/2026-09-05-homepage-live-stage-design.md` §4–6): the website will scrub one real run with scroll. This PR builds the thing it scrubs, in the demo app, verifiable on its own. + +## What + +- `/stage`: real `` beside real ``, replaying `public/stage-replay.json` (a live capture of four beats: stream with citations, reload + fork, the backup cleanup with its interrupt, the generated form) to any recorded time via `?t=` or the `tplane-stage` postMessage protocol. +- `StageReplayTransport` gates recorded events behind a target time; `StageController` performs each run's recorded action as time crosses it, holds at the interrupt for an authored window, and rewinds by reset + fast-forward. +- `?record=1` runs the four-beat script against the live backend through `StageRecordingTransport`, which captures runs with their actions, history responses, and the thread id. +- Still recorder writes eight `apps/website/public/screenshots/stage-*.webp` for the website's non-pinned fallback. + +## Tests + +Types, timeline, transport gate, controller against the real LangGraph agent (forward, reload restore, hold, resume, rewind, coalescing), recording transport, script order, bridge, component; fixture spec pins the four beats and the guardrail; e2e on the committed replay. + +🤖 Generated with [Claude Code](https://claude.com/claude-code) +EOF +``` + +--- + +## Self-review + +**Spec coverage:** §4.2 route (Task 6), §4.3 protocol (Task 6 bridge: `t` in; `ready`/`applied`/`phase` out — the spec's `data-sc-verify-state` write is the parent's job in plan 3), §4.4 seekable replay (Tasks 3–4; the spec's "snapshot ring every 200 events" is deferred: rewinds reset and fast-forward through the gate, and Task 4's rewind test is the budget check — if it is slow, add snapshots then), §4.5 devtools untouched (Task 6 uses the component as is), §5.1 script and fixture spec (Tasks 5, 7), §5.2's beat boundaries exported for plan 3 (`timeline.beats`, posted in `ready`), §6 hold (Task 2 `HOLD_MS`, Task 4 tests), §8 stills (Task 8), §13 plan 2's `?t=` verification (Tasks 6, 8). + +**Deviations stated:** the spec §5.1 says "forks from the previous checkpoint through the agent's branch API"; this plan forks by submitting with `checkpointId` of the first answer's checkpoint, which is the LangGraph branch primitive. The spec §4.4 batching claim is realised by the async gate rather than a synchronous apply; the controller test asserts outcomes, not frame timing. + +**Placeholders:** Task 6's `this.replayTransport['getRecording']()` is called out as not-to-ship with the replacement named. Task 6 Step 6's devtools width is a measured value the step tells you how to obtain. + +**Type consistency:** `StageAction`/`StageBeat`/`StageRun`/`StageRecording` (Task 1) are used by Tasks 2–7 with the same field names; `buildTimeline` returns `{ runs, beats, hold, totalMs }` consumed by Tasks 3, 4, 6, 8; `StageReplayTransport` exposes `seek`, `reset`, `ready`, `applied`, `appliedSignal`, `runIndex`, `getHistory` used by Tasks 4 and 6; `StageController` exposes `seek`, `phase`, `applied`, `t` used by Task 6; `StageScriptHost` (Task 5) is implemented in Task 6's `record()`; the bridge messages in Task 6 match the spec §4.3 shape. diff --git a/examples/chat/angular/e2e/record-stage-fixture.record.ts b/examples/chat/angular/e2e/record-stage-fixture.record.ts new file mode 100644 index 000000000..fd34da0e7 --- /dev/null +++ b/examples/chat/angular/e2e/record-stage-fixture.record.ts @@ -0,0 +1,35 @@ +/** + * NOT a test. Drives /stage?record=1 (the four-beat script against the live + * agent, wrapped in StageRecordingTransport) and writes public/stage-replay.json. + * Run through record-stage-live.config.ts with the backend on :2024 and the + * dev server on :4200 already up. Takes vary; commit a complete one and never + * edit its prose. + */ +import { test, expect } from '@playwright/test'; +import { writeFileSync } from 'node:fs'; +import { resolve } from 'node:path'; + +const OUT = resolve(__dirname, '../public/stage-replay.json'); +/* eslint-disable @typescript-eslint/no-explicit-any */ + +test('record stage fixture', async ({ page }) => { + page.on('console', (m) => { console.log(`[browser:${m.type()}]`, m.text()); }); + await page.goto('/stage?record=1'); + await expect.poll(async () => page.evaluate(() => (window as any).__stageRecording?.runs.length ?? 0), { timeout: 400_000 }).toBe(7); + let last = -1; + for (let i = 0; i < 40; i++) { + const n = await page.evaluate(() => (window as any).__stageRecording?.runs.at(-1)?.events.length ?? 0); + if (n > 0 && n === last) break; + last = n; + await page.waitForTimeout(3000); + } + // Let the final run-close history refresh land before reading. + await page.waitForTimeout(2000); + const rec = await page.evaluate(() => (window as any).__stageRecording); + expect(rec.runs.map((r: any) => `${r.beat}:${r.action.kind}`)).toEqual([ + 'stream:submit', 'persist:reload', 'persist:submit', 'persist:submit', 'approve:submit', 'approve:resume', 'render:submit', + ]); + expect(rec.threadId).toBeTruthy(); + writeFileSync(OUT, JSON.stringify(rec, null, 2) + '\n'); + console.log(`wrote ${OUT}`); +}); diff --git a/examples/chat/angular/e2e/record-stage-live.config.ts b/examples/chat/angular/e2e/record-stage-live.config.ts new file mode 100644 index 000000000..524905ee2 --- /dev/null +++ b/examples/chat/angular/e2e/record-stage-live.config.ts @@ -0,0 +1,52 @@ +/** + * Playwright config for recording the stage walkthrough fixture against the + * REAL model, rather than the aimock replay `record-stage.config.ts` uses. + * + * `public/stage-replay.json` is shipped behind a pill that reads "Replaying a + * recorded LangGraph run", so the words in it have to be words a model actually + * said. Recording through aimock makes the stream events real but the prose + * authored, which the pill then misrepresents. + * + * Unlike the other configs this one starts NOTHING — bring your own servers, so + * that the OpenAI key stays in your shell and never reaches a committed file: + * + * # 1. backend on :2024, pointed at the real API + * cd examples/chat/python && \ + * export OPENAI_API_KEY=$(grep -E '^OPENAI_API_KEY=' ../../../.env | cut -d= -f2-) && \ + * uv run langgraph dev --port 2024 --no-browser + * + * # 2. the demo on :4200 (dev build — /stage?record=1 is inert in production) + * npx nx serve examples-chat-angular --port 4200 + * + * # 3. one take + * npx playwright test -c examples/chat/angular/e2e/record-stage-live.config.ts record-stage-fixture + * + * Takes vary: the model is free to answer how it likes, so record several and + * commit the best COMPLETE one (the recorder's own assertions — seven runs in + * the exact beat order, a truthy threadId — reject incomplete takes for you). + * Picking a take is the same latitude a demo video has. Editing what the model + * said is not: that is what this config exists to stop. + * + * The timeout is far longer than the replay config's because a real run streams + * at model speed, with reasoning, instead of at aimock speed. + * + * In a worktree, `../../../.env` (relative to examples/chat/python) does not + * exist — the `.env` lives in the primary checkout, so point the export at + * that path instead. + */ +import { defineConfig } from '@playwright/test'; + +export default defineConfig({ + testDir: '.', + testMatch: '**/record-stage-fixture.record.ts', + fullyParallel: false, + workers: 1, + retries: 0, + reporter: 'list', + timeout: 600_000, + use: { + baseURL: 'http://localhost:4200', + viewport: { width: 1200, height: 720 }, + }, + outputDir: './.record-output', +}); diff --git a/examples/chat/angular/e2e/record-stage-stills.record.ts b/examples/chat/angular/e2e/record-stage-stills.record.ts new file mode 100644 index 000000000..94decfa56 --- /dev/null +++ b/examples/chat/angular/e2e/record-stage-stills.record.ts @@ -0,0 +1,84 @@ +/** + * NOT a test. Captures one still per beat from the committed stage replay, at + * desktop and phone widths, for the website's non-pinned fallback (spec §8). + * npx playwright test --config examples/chat/angular/e2e/record-stage.config.ts record-stage-stills + * + * Each still is taken at a SETTLED moment of its beat (the beat's end, or the + * middle of the authored hold for approve), read from `window.__stageTimeline` + * so a re-recorded fixture moves the capture points with it. The recorder + * waits on `window.__stageApplied.t` reaching the target: the controller + * clamps a seek to `[0, totalMs]` and every target here is inside that range, + * so equality is the right wait. + * + * Geometry: the desktop frame is the 1200x720 the stage is authored for, with + * the devtools docked right. Below 768px the stage renders NO devtools (see + * `readStageDock` — the phone path is chat only, a docked panel would eat the + * transcript), so the phone still is the chat at 390x650 (3:5, the phone + * ratio the hero poster uses). `deviceScaleFactor: 2` applies to BOTH sizes: + * the desktop still is a 2400-wide raster downscaled to 1200, and the phone + * still a 780-wide raster downscaled to 585 — crisp downscales rather than a + * 1x raster shipped as-is or a 1.5x upscale of a 390px one. + */ +import { expect, test } from '@playwright/test'; +import { resolve } from 'node:path'; +import sharp from 'sharp'; +import type { StageBeat } from '../src/app/stage/stage-recording.types'; +import type { StageTimeline } from '../src/app/stage/stage-timeline'; + +const OUT_DIR = resolve(__dirname, '../../../../apps/website/public/screenshots'); +const SIZES = [ + { suffix: '', width: 1200, height: 720, ship: 1200 }, + { suffix: '-mobile', width: 390, height: 650, ship: 585 }, +]; +/** The website's budget per still; the hero poster ships well under it too. */ +const MAX_BYTES = 120 * 1024; + +test.use({ deviceScaleFactor: 2 }); + +test('capture stage stills', async ({ page }) => { + await page.goto('/stage?t=0'); + await page.waitForFunction(() => !!window.__stageTimeline); + const tl = await page.evaluate(() => window.__stageTimeline as StageTimeline); + const endOf = (b: StageBeat) => { + const hit = tl.beats.find((x) => x.beat === b); + if (!hit) throw new Error(`recording has no "${b}" beat`); + return hit.endMs; + }; + const settle: Record = { + stream: endOf('stream'), + persist: endOf('persist'), + approve: tl.hold.startMs + Math.round((tl.hold.endMs - tl.hold.startMs) / 2), + render: tl.totalMs, + }; + // Collected, not asserted per file: a throw mid-loop would leave the set + // half rewritten. Every offender is listed once after both loops. + const oversized: string[] = []; + for (const size of SIZES) { + await page.setViewportSize({ width: size.width, height: size.height }); + for (const [beat, t] of Object.entries(settle)) { + await page.goto(`/stage?t=${t}`); + await page.waitForFunction((target) => window.__stageApplied?.t === target, t, { + timeout: 60_000, + }); + await page.waitForTimeout(400); + // What keeps a mistimed capture from shipping silently. + if (beat === 'approve') { + await expect(page.locator('chat-interrupt-panel')).toBeAttached(); + await expect(page.locator('app-backup-table [data-state="rows"]')).toBeAttached(); + } + if (beat === 'render') { + await expect(page.locator('a2ui-surface').first()).toBeAttached(); + await expect(page.locator('chat-interrupt-panel')).toHaveCount(0); + } + const png = await page.screenshot({ type: 'png', fullPage: false }); + const out = resolve(OUT_DIR, `stage-${beat}${size.suffix}.webp`); + const info = await sharp(png) + .resize({ width: size.ship }) + .webp({ quality: 60, effort: 6 }) + .toFile(out); + if (info.size > MAX_BYTES) oversized.push(`${out} (${info.size} bytes)`); + console.log(`wrote ${out} (${Math.round(info.size / 1024)} KB)`); + } + } + expect(oversized, `stills over ${MAX_BYTES} bytes:\n${oversized.join('\n')}`).toEqual([]); +}); diff --git a/examples/chat/angular/e2e/record-stage.config.ts b/examples/chat/angular/e2e/record-stage.config.ts new file mode 100644 index 000000000..705a1cb7d --- /dev/null +++ b/examples/chat/angular/e2e/record-stage.config.ts @@ -0,0 +1,33 @@ +/** + * Playwright config for the stage STILL recorder. Mirrors + * `record-hero.config.ts` — the same aimock-backed global setup, so the demo + * boots without an API key — and captures one still per beat from the + * committed `public/stage-replay.json` (the replay itself needs no model). + * + * The stills are the website's non-pinned fallback: where the live stage + * iframe is not pinned and scrubbed (phones, reduced motion, no JS), the site + * shows these frames instead. + * + * `record-stage-fixture.record.ts` is NOT matched here on purpose: the fixture + * is recorded against the real model via `record-stage-live.config.ts`. + * + * npx playwright test --config examples/chat/angular/e2e/record-stage.config.ts record-stage-stills + */ +import { defineConfig } from '@playwright/test'; + +export default defineConfig({ + testDir: '.', + testMatch: '**/record-stage-stills.record.ts', + fullyParallel: false, + workers: 1, + retries: 0, + reporter: 'list', + timeout: 240_000, + use: { + baseURL: 'http://localhost:4200', + viewport: { width: 1200, height: 720 }, + }, + globalSetup: './global-setup.ts', + globalTeardown: './global-teardown.ts', + outputDir: './.record-output', +}); diff --git a/examples/chat/angular/e2e/stage-globals.d.ts b/examples/chat/angular/e2e/stage-globals.d.ts new file mode 100644 index 000000000..056f86a11 --- /dev/null +++ b/examples/chat/angular/e2e/stage-globals.d.ts @@ -0,0 +1,11 @@ +import type { StageState } from '../src/app/stage/stage-bridge'; +import type { StageTimeline } from '../src/app/stage/stage-timeline'; + +// Mirrors the augmentation in stage-mode.component.ts: the e2e tsconfig does +// not compile src/, so the stage specs and the still recorder share this copy. +declare global { + interface Window { + __stageTimeline?: StageTimeline; + __stageApplied?: StageState; + } +} diff --git a/examples/chat/angular/e2e/stage.spec.ts b/examples/chat/angular/e2e/stage.spec.ts new file mode 100644 index 000000000..b3da759bb --- /dev/null +++ b/examples/chat/angular/e2e/stage.spec.ts @@ -0,0 +1,60 @@ +import { test, expect, type Page } from '@playwright/test'; +import { attachBrowserHygiene } from './test-helpers'; +import type { StageTimeline } from '../src/app/stage/stage-timeline'; + +/** + * The /stage route replays the committed `public/stage-replay.json` beside the + * real devtools, seekable by `?t=`. The page publishes its timeline on + * `window.__stageTimeline` once the replay is ready, so the specs read the + * beat boundaries from the recording rather than hard-coding milliseconds + * that would drift on the next re-record. + */ +async function timeline(page: Page): Promise { + await page.goto('/stage?t=0'); + await expect + .poll(() => page.evaluate(() => !!window.__stageTimeline), { timeout: 30_000 }) + .toBe(true); + return page.evaluate(() => window.__stageTimeline as StageTimeline); +} + +test.describe('stage replay', () => { + test.describe.configure({ timeout: 120_000 }); + + test('renders the chat beside the devtools and seeks to the approve hold', async ({ page }) => { + const hygiene = attachBrowserHygiene(page); + const tl = await timeline(page); + await expect(page.getByRole('region', { name: 'Chat devtools' })).toBeVisible(); + // +1: strictly inside the hold. The boundary instant still belongs to the + // outgoing run (phaseReachedAt in stage-timeline.ts renders t minus an epsilon). + await page.goto(`/stage?t=${tl.hold.startMs + 1}`); + await expect(page.locator('chat-interrupt-panel')).toBeAttached({ timeout: 60_000 }); + // Guards the transcript pin: the panel and the newest content sit in view. + await expect(page.locator('chat-interrupt-panel')).toBeInViewport({ timeout: 60_000 }); + // The pause comes from delete_backups, after list_backups has rendered its + // registered tool view — the inventory the visitor is being asked about. + await expect(page.locator('app-backup-table [data-state="rows"]')).toBeAttached(); + // Replay is a recording, not a control surface: the panel shows but cannot + // be clicked, so a visitor cannot desync the transcript from t. + expect( + await page + .locator('[data-stage-interrupt]') + .evaluate((el) => getComputedStyle(el).pointerEvents), + ).toBe('none'); + expect(hygiene.consoleErrors).toEqual([]); + }); + + test('the end of the recording mounts the generated form and the devtools shows the thread', async ({ + page, + }) => { + const hygiene = attachBrowserHygiene(page); + const tl = await timeline(page); + await page.goto(`/stage?t=${tl.totalMs}`); + await expect(page.locator('a2ui-surface').first()).toBeAttached({ timeout: 90_000 }); + // Guards the transcript pin: the generated form is the newest content. + await expect(page.locator('a2ui-surface').first()).toBeInViewport({ timeout: 90_000 }); + await expect(page.locator('chat-interrupt-panel')).toHaveCount(0); + await page.getByRole('tab', { name: 'Timeline' }).click(); + await expect(page.getByRole('region', { name: 'Chat devtools' })).toContainText(/checkpoint/i); + expect(hygiene.consoleErrors).toEqual([]); + }); +}); diff --git a/examples/chat/angular/project.json b/examples/chat/angular/project.json index 08f209f45..9fa578d77 100644 --- a/examples/chat/angular/project.json +++ b/examples/chat/angular/project.json @@ -40,7 +40,6 @@ "define": { "THREADPLANE_CHAT_DEBUG": "false" }, - "externalDependencies": ["@threadplane/chat/debug"], "budgets": [ { "type": "initial", diff --git a/examples/chat/angular/public/stage-replay.json b/examples/chat/angular/public/stage-replay.json new file mode 100644 index 000000000..9ae261ab4 --- /dev/null +++ b/examples/chat/angular/public/stage-replay.json @@ -0,0 +1,206264 @@ +{ + "version": 2, + "recordedAt": "2026-09-06T02:31:14.457Z", + "threadId": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "runs": [ + { + "beat": "stream", + "action": { + "kind": "submit", + "message": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool." + }, + "events": [ + { + "tMs": 2683, + "event": { + "type": "metadata", + "run_id": "01a0748e-3f52-7383-8125-272822ea9199", + "attempt": 1, + "data": { + "run_id": "01a0748e-3f52-7383-8125-272822ea9199", + "attempt": 1 + } + } + }, + { + "tMs": 2684, + "event": { + "type": "values", + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + } + ], + "data": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 9562, + "output_tokens": 560, + "total_tokens": 10122, + "input_token_details": { + "cache_read": 9216 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + } + } + }, + { + "tMs": 8555, + "event": { + "type": "updates", + "attach_citations": { + "messages": [ + { + "content": "", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "remove", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNB2xRsO-N6mXlvzWFrDPdtcNqjwu3kIAuXPMnyubp8TUDGAkb4A8dtQbKjk7wUN_EKnNW4p576Bq2kEs_qW3T9FNd3EO7BelpLFsGqteYPfYKpHcyTLF018uX6NPBgD3KfyoCnpcrBtVcT47BYQDETmDxm_aG30rfYrpIHYDcdBHYBO_6-iAJMge1gPO2hpqoNIlDyLmDL5heVtiAvIVQt-2qqDBAABseqqBK16Ll0Okc6_esIduSJPIEtnscQQ0iTLFP5lqwgYvJegnJAkk53bOw4Yfohp8Hwb1ug8b1r88ycubgZVSRBExTdIxeUKTpA36NCJSFDkxDumOsHkktJ_RmEYpEdcjwQdvVkm1C3jmuOtynnuJfiGOQjctVDEB_O_x4Tg4yKMgjAnJNJAecjnhonUxLZGSxMj5KMdZw0EQ-XxNkKLxiBtvYBzIx18E-zceM6wyVzSo6aEboHrpIa0LWNu_XSPN1SGSpVgAt-dhWBQNU20OjWp5sDXx7RHKCnLtGGD4EHWYuJdB0sO92ak-IP-_XvIDLMk737k5P-LDesl1KM7L-zLG5wJlUJR_naj8Ig8AdkXOeS2d8x47IKcSCe-GerXed-muHJ0eIx-ubTRKpjLmXq5vOQZAe9Hy3Tk8LqI6fJalq8gXNLAD2qmRDboyV6B1uPU2_BKvp4W7ngJIhO40lyEdZnKqiztiEOtIQTbWzasZBdSENOddsFAjquUclgx_VwxwYnGb2TIO1XATmG9xUdblX8dro9SftyEwPiyYxxknHXsW7b8NGVINYaHihvaaqnRibk8VPqJqmLtTKdk1FuX2egYaXf7K2JOiSMaRMPzfXBlTFExrJn9S1554cDr-zy59VS4Z0Dg-gNz6djAmStpFcAgHOCx_P7CVugbSUUbD7LT6PAvAQNsJkCQjc-zs_gmBVYMqnYTIjByAQcixZFawz4d2jUjTRCzaMF7-0r8qsXC7n03XByoS1d1hbzQa9LIM28kD04noORGFjlWFiU67RS6E8v-4L0iyjnb2JhhmOA1W09nxhxnHhMDU1SDThVytW5yW2QbL-kseznFNJOLVQYpeh6BdeXpPqJbOsnEQL1bCrt774ec-MxLAY6_z2ifcRGSI5h_e7MtAgy0le5-1Br4deSC7GKnkFTgLmejRmFeFGWv7ucp5tLeOHrGf78H1gAp1FBJDQA=", + "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + }, + "data": { + "attach_citations": { + "messages": [ + { + "content": "", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "remove", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNB2xRsO-N6mXlvzWFrDPdtcNqjwu3kIAuXPMnyubp8TUDGAkb4A8dtQbKjk7wUN_EKnNW4p576Bq2kEs_qW3T9FNd3EO7BelpLFsGqteYPfYKpHcyTLF018uX6NPBgD3KfyoCnpcrBtVcT47BYQDETmDxm_aG30rfYrpIHYDcdBHYBO_6-iAJMge1gPO2hpqoNIlDyLmDL5heVtiAvIVQt-2qqDBAABseqqBK16Ll0Okc6_esIduSJPIEtnscQQ0iTLFP5lqwgYvJegnJAkk53bOw4Yfohp8Hwb1ug8b1r88ycubgZVSRBExTdIxeUKTpA36NCJSFDkxDumOsHkktJ_RmEYpEdcjwQdvVkm1C3jmuOtynnuJfiGOQjctVDEB_O_x4Tg4yKMgjAnJNJAecjnhonUxLZGSxMj5KMdZw0EQ-XxNkKLxiBtvYBzIx18E-zceM6wyVzSo6aEboHrpIa0LWNu_XSPN1SGSpVgAt-dhWBQNU20OjWp5sDXx7RHKCnLtGGD4EHWYuJdB0sO92ak-IP-_XvIDLMk737k5P-LDesl1KM7L-zLG5wJlUJR_naj8Ig8AdkXOeS2d8x47IKcSCe-GerXed-muHJ0eIx-ubTRKpjLmXq5vOQZAe9Hy3Tk8LqI6fJalq8gXNLAD2qmRDboyV6B1uPU2_BKvp4W7ngJIhO40lyEdZnKqiztiEOtIQTbWzasZBdSENOddsFAjquUclgx_VwxwYnGb2TIO1XATmG9xUdblX8dro9SftyEwPiyYxxknHXsW7b8NGVINYaHihvaaqnRibk8VPqJqmLtTKdk1FuX2egYaXf7K2JOiSMaRMPzfXBlTFExrJn9S1554cDr-zy59VS4Z0Dg-gNz6djAmStpFcAgHOCx_P7CVugbSUUbD7LT6PAvAQNsJkCQjc-zs_gmBVYMqnYTIjByAQcixZFawz4d2jUjTRCzaMF7-0r8qsXC7n03XByoS1d1hbzQa9LIM28kD04noORGFjlWFiU67RS6E8v-4L0iyjnb2JhhmOA1W09nxhxnHhMDU1SDThVytW5yW2QbL-kseznFNJOLVQYpeh6BdeXpPqJbOsnEQL1bCrt774ec-MxLAY6_z2ifcRGSI5h_e7MtAgy0le5-1Br4deSC7GKnkFTgLmejRmFeFGWv7ucp5tLeOHrGf78H1gAp1FBJDQA=", + "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + } + } + } + }, + { + "tMs": 8556, + "event": { + "type": "values", + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ], + "data": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ], + "data": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + } + } + }, + { + "tMs": 5191, + "event": { + "type": "updates", + "attach_citations": null, + "data": { + "attach_citations": null + } + } + }, + { + "tMs": 5201, + "event": { + "type": "updates", + "generate_title": null, + "data": { + "generate_title": null + } + } + } + ] + }, + { + "beat": "persist", + "action": { + "kind": "submit", + "message": "Make it a haiku instead.", + "checkpointIndex": 9 + }, + "events": [ + { + "tMs": 1036, + "event": { + "type": "metadata", + "run_id": "01a0748e-83a9-7cf3-83c5-00e24cb70205", + "attempt": 1, + "data": { + "run_id": "01a0748e-83a9-7cf3-83c5-00e24cb70205", + "attempt": 1 + } + } + }, + { + "tMs": 1039, + "event": { + "type": "values", + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Make it a haiku instead.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "7b6bf152-219f-47ab-acfd-b76c6d636c64" + } + ], + "data": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Make it a haiku instead.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "7b6bf152-219f-47ab-acfd-b76c6d636c64" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd08594c487d0affe4ca93df26dd3", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCFguWZ1b73YEbg1TFNc-IwNkdO0bKyfQbh7WxCiiJ_bcdfj8RglkIWCAOJrhqpfb2ZQTrx-wI9Wl0doEMOJcwwFRj-Xx0NaNbJMkOn8S5v95iOy1cY1NgjrefKBQv7994WM_g-LAhRNs8TC6YqLDIrzpbcVhXmE2QZXiD8pxq8xOgHhZFikkmmrloyGBwa7SZ73jUytPD9X7HkYDNn3JWNVcvXxJlENK4-Cy8zbj9gjY5S1bqEvQUYi45etKwN52czxSj5_8APyMoq7Zcv3sn-0aVp0Ji9rmApZy69eNs4-kqqAQG22OpwicAiM46i35JvdOQxaRc94uHQW1jLlkSyNC-uTjTa3KDh0T-t6A-RX8YSRfwwWMVJRg3jYVupvE7fE6zTnkkfAw_2aCUN72SbQ2fuA7kXj95yyZWS-M-_dLiTGU7tEvvF_Wx4GEchYwpHgR6J7VoR3htiFytyHN3T74y2GyasVv3_Wv-PZwHuHg0qoGsk8PTlkFdazYzzOirYOSrbXdSabLmsw2K8FI9hi4rhgrVbOvsZu_tJWOvwP4qJDCnJR0Ceh0fUAJzd_J1XaDhPlrAch7VfuQMdpibJEA0Emu3JBIbvtSNlRTljbKEvXzvxLhEk-JuFdmAFfMZceOxL-MGiRCs4wxdq2e19tWebgb9haWudgzvAuaOSX25A4bcnGLbveUb936bNh109-RrfKI1MCHVCgS10qP_5IxnceXxwbaQL0giCJBEBlI1FnY0QnJYfzGwBlU9GLi0iLZOiAGpqICtNCVvN4QYr3w_Lv3z7YTu8HN04Z2K9doDwWbC_PkH4lHjKSjnk_ldCNtLdzgg74Z7vRZXkxxF_VSJwVF3aYrZwvIyxIy3RGOLPA8ra-iQGtcJPZT_wL_jaXhTnPABUYhv1Fht7jIrFxomtT2U3nx_5K3ZFrsO0ppsh7kmB0hOxUfeTSE6M8Pktx1nq5LGndL7klEn7rWpIKKvH8TgXRRx3ZbUmZSh2E3UvmTKWI7PrtDn3RFF60bSGXnEaM70X-6daPrd9jh_TMLcx86k6bzAZDCdgSuBTTdQX21Gmz6RarHxDv5EU7_YrifflRt56ccnYckuQ-PaJ7LVwVZ0ruejNuiq42laaNfau94DE92_r13XkbeguFvwcbePSzzG_PWi43OnitoPh_y8TJpAvL3lNUFp7EFc8tGw=", + "index": 0 + }, + { + "type": "text", + "text": "Signals hold, spread change \nComputed blooms, effects wake — clear \nBridges to Rx flow", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd085b15087d087efbebc0e357917" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "created_at": 1788661893, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10300, + "output_tokens": 37, + "total_tokens": 10337, + "input_token_details": { + "cache_read": 9984 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ], + "data": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Make it a haiku instead.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "7b6bf152-219f-47ab-acfd-b76c6d636c64" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd08594c487d0affe4ca93df26dd3", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCFguWZ1b73YEbg1TFNc-IwNkdO0bKyfQbh7WxCiiJ_bcdfj8RglkIWCAOJrhqpfb2ZQTrx-wI9Wl0doEMOJcwwFRj-Xx0NaNbJMkOn8S5v95iOy1cY1NgjrefKBQv7994WM_g-LAhRNs8TC6YqLDIrzpbcVhXmE2QZXiD8pxq8xOgHhZFikkmmrloyGBwa7SZ73jUytPD9X7HkYDNn3JWNVcvXxJlENK4-Cy8zbj9gjY5S1bqEvQUYi45etKwN52czxSj5_8APyMoq7Zcv3sn-0aVp0Ji9rmApZy69eNs4-kqqAQG22OpwicAiM46i35JvdOQxaRc94uHQW1jLlkSyNC-uTjTa3KDh0T-t6A-RX8YSRfwwWMVJRg3jYVupvE7fE6zTnkkfAw_2aCUN72SbQ2fuA7kXj95yyZWS-M-_dLiTGU7tEvvF_Wx4GEchYwpHgR6J7VoR3htiFytyHN3T74y2GyasVv3_Wv-PZwHuHg0qoGsk8PTlkFdazYzzOirYOSrbXdSabLmsw2K8FI9hi4rhgrVbOvsZu_tJWOvwP4qJDCnJR0Ceh0fUAJzd_J1XaDhPlrAch7VfuQMdpibJEA0Emu3JBIbvtSNlRTljbKEvXzvxLhEk-JuFdmAFfMZceOxL-MGiRCs4wxdq2e19tWebgb9haWudgzvAuaOSX25A4bcnGLbveUb936bNh109-RrfKI1MCHVCgS10qP_5IxnceXxwbaQL0giCJBEBlI1FnY0QnJYfzGwBlU9GLi0iLZOiAGpqICtNCVvN4QYr3w_Lv3z7YTu8HN04Z2K9doDwWbC_PkH4lHjKSjnk_ldCNtLdzgg74Z7vRZXkxxF_VSJwVF3aYrZwvIyxIy3RGOLPA8ra-iQGtcJPZT_wL_jaXhTnPABUYhv1Fht7jIrFxomtT2U3nx_5K3ZFrsO0ppsh7kmB0hOxUfeTSE6M8Pktx1nq5LGndL7klEn7rWpIKKvH8TgXRRx3ZbUmZSh2E3UvmTKWI7PrtDn3RFF60bSGXnEaM70X-6daPrd9jh_TMLcx86k6bzAZDCdgSuBTTdQX21Gmz6RarHxDv5EU7_YrifflRt56ccnYckuQ-PaJ7LVwVZ0ruejNuiq42laaNfau94DE92_r13XkbeguFvwcbePSzzG_PWi43OnitoPh_y8TJpAvL3lNUFp7EFc8tGw=", + "index": 0 + }, + { + "type": "text", + "text": "Signals hold, spread change \nComputed blooms, effects wake — clear \nBridges to Rx flow", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd085b15087d087efbebc0e357917" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "created_at": 1788661893, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10300, + "output_tokens": 37, + "total_tokens": 10337, + "input_token_details": { + "cache_read": 9984 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Clean up our old database backups, anything older than 90 days.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "b753a836-cc3b-46b9-84e5-a81a98cdc2a8" + } + ], + "data": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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older than 90 days.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "b753a836-cc3b-46b9-84e5-a81a98cdc2a8" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd08977d887d0958d7b91d1a54cd2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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"usage_metadata": { + "input_tokens": 9314, + "output_tokens": 41, + "total_tokens": 9355, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "[{\"id\": \"ng-signals-overview\", \"title\": \"Signals \\u2014 Angular guide\", \"url\": \"https://angular.dev/guide/signals\", \"snippet\": \"Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions.\"}, {\"id\": \"ng-signals-rxjs\", \"title\": \"RxJS interop with signals\", \"url\": \"https://angular.dev/guide/signals/rxjs-interop\", \"snippet\": \"toSignal() and toObservable() bridge between RxJS Observables and signals.\"}, {\"id\": \"ng-control-flow\", \"title\": \"Built-in control flow \\u2014 @if, @for, @switch\", \"url\": \"https://angular.dev/guide/templates/control-flow\", \"sourceType\": \"file\", \"snippet\": \"Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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+ "index": 0 + }, + { + "type": "text", + "text": "Signals hold, spread change \nComputed blooms, effects wake — clear \nBridges to Rx flow", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd085b15087d087efbebc0e357917" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "created_at": 1788661893, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10300, + "output_tokens": 37, + "total_tokens": 10337, + "input_token_details": { + "cache_read": 9984 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Clean up our old database backups, anything 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Make it a haiku instead.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "7b6bf152-219f-47ab-acfd-b76c6d636c64" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd08594c487d0affe4ca93df26dd3", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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older than 90 days.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "b753a836-cc3b-46b9-84e5-a81a98cdc2a8" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd08977d887d0958d7b91d1a54cd2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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"usage_metadata": { + "input_tokens": 9314, + "output_tokens": 41, + "total_tokens": 9355, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "[{\"id\": \"ng-signals-overview\", \"title\": \"Signals \\u2014 Angular guide\", \"url\": \"https://angular.dev/guide/signals\", \"snippet\": \"Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions.\"}, {\"id\": \"ng-signals-rxjs\", \"title\": \"RxJS interop with signals\", \"url\": \"https://angular.dev/guide/signals/rxjs-interop\", \"snippet\": \"toSignal() and toObservable() bridge between RxJS Observables and signals.\"}, {\"id\": \"ng-control-flow\", \"title\": \"Built-in control flow \\u2014 @if, @for, @switch\", \"url\": \"https://angular.dev/guide/templates/control-flow\", \"sourceType\": \"file\", \"snippet\": \"Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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+ "index": 0 + }, + { + "type": "text", + "text": "Signals hold, spread change \nComputed blooms, effects wake — clear \nBridges to Rx flow", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd085b15087d087efbebc0e357917" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "created_at": 1788661893, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10300, + "output_tokens": 37, + "total_tokens": 10337, + "input_token_details": { + "cache_read": 9984 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Clean up our old database backups, anything 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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"usage_metadata": { + "input_tokens": 9314, + "output_tokens": 41, + "total_tokens": 9355, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "[{\"id\": \"ng-signals-overview\", \"title\": \"Signals \\u2014 Angular guide\", \"url\": \"https://angular.dev/guide/signals\", \"snippet\": \"Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions.\"}, {\"id\": \"ng-signals-rxjs\", \"title\": \"RxJS interop with signals\", \"url\": \"https://angular.dev/guide/signals/rxjs-interop\", \"snippet\": \"toSignal() and toObservable() bridge between RxJS Observables and signals.\"}, {\"id\": \"ng-control-flow\", \"title\": \"Built-in control flow \\u2014 @if, @for, @switch\", \"url\": \"https://angular.dev/guide/templates/control-flow\", \"sourceType\": \"file\", \"snippet\": \"Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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+ "index": 0 + }, + { + "type": "text", + "text": "Signals hold, spread change \nComputed blooms, effects wake — clear \nBridges to Rx flow", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd085b15087d087efbebc0e357917" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "created_at": 1788661893, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10300, + "output_tokens": 37, + "total_tokens": 10337, + "input_token_details": { + "cache_read": 9984 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Clean up our old database backups, anything 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + }, + "next": [ + "generate_title" + ], + "tasks": [ + { + "id": "1e7d7b21-1926-9d0e-727f-a53c61f25b6c", + "name": "generate_title", + "path": [ + "__pregel_pull", + "generate_title" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": {} + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-3f52-7383-8125-272822ea9199", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 4, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "0b55dcf1-174e-4c9e-b716-fccf15b1b5cd" + }, + "created_at": "2026-09-06T02:31:23.043645+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b0-d203-68b2-8004-e2dbe78f0579", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b0-d203-68b2-8004-e2dbe78f0579", + "parent_checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 9562, + "output_tokens": 560, + "total_tokens": 10122, + "input_token_details": { + "cache_read": 9216 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [ + "attach_citations" + ], + "tasks": [ + { + "id": "dfba0e77-4c7c-cff0-21b5-1e2a4dd2c275", + "name": "attach_citations", + "path": [ + "__pregel_pull", + "attach_citations" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": { + "messages": [ + { + "content": "", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "remove", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNB2xRsO-N6mXlvzWFrDPdtcNqjwu3kIAuXPMnyubp8TUDGAkb4A8dtQbKjk7wUN_EKnNW4p576Bq2kEs_qW3T9FNd3EO7BelpLFsGqteYPfYKpHcyTLF018uX6NPBgD3KfyoCnpcrBtVcT47BYQDETmDxm_aG30rfYrpIHYDcdBHYBO_6-iAJMge1gPO2hpqoNIlDyLmDL5heVtiAvIVQt-2qqDBAABseqqBK16Ll0Okc6_esIduSJPIEtnscQQ0iTLFP5lqwgYvJegnJAkk53bOw4Yfohp8Hwb1ug8b1r88ycubgZVSRBExTdIxeUKTpA36NCJSFDkxDumOsHkktJ_RmEYpEdcjwQdvVkm1C3jmuOtynnuJfiGOQjctVDEB_O_x4Tg4yKMgjAnJNJAecjnhonUxLZGSxMj5KMdZw0EQ-XxNkKLxiBtvYBzIx18E-zceM6wyVzSo6aEboHrpIa0LWNu_XSPN1SGSpVgAt-dhWBQNU20OjWp5sDXx7RHKCnLtGGD4EHWYuJdB0sO92ak-IP-_XvIDLMk737k5P-LDesl1KM7L-zLG5wJlUJR_naj8Ig8AdkXOeS2d8x47IKcSCe-GerXed-muHJ0eIx-ubTRKpjLmXq5vOQZAe9Hy3Tk8LqI6fJalq8gXNLAD2qmRDboyV6B1uPU2_BKvp4W7ngJIhO40lyEdZnKqiztiEOtIQTbWzasZBdSENOddsFAjquUclgx_VwxwYnGb2TIO1XATmG9xUdblX8dro9SftyEwPiyYxxknHXsW7b8NGVINYaHihvaaqnRibk8VPqJqmLtTKdk1FuX2egYaXf7K2JOiSMaRMPzfXBlTFExrJn9S1554cDr-zy59VS4Z0Dg-gNz6djAmStpFcAgHOCx_P7CVugbSUUbD7LT6PAvAQNsJkCQjc-zs_gmBVYMqnYTIjByAQcixZFawz4d2jUjTRCzaMF7-0r8qsXC7n03XByoS1d1hbzQa9LIM28kD04noORGFjlWFiU67RS6E8v-4L0iyjnb2JhhmOA1W09nxhxnHhMDU1SDThVytW5yW2QbL-kseznFNJOLVQYpeh6BdeXpPqJbOsnEQL1bCrt774ec-MxLAY6_z2ifcRGSI5h_e7MtAgy0le5-1Br4deSC7GKnkFTgLmejRmFeFGWv7ucp5tLeOHrGf78H1gAp1FBJDQA=", + "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + } + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-3f52-7383-8125-272822ea9199", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 3, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "0b55dcf1-174e-4c9e-b716-fccf15b1b5cd" + }, + "created_at": "2026-09-06T02:31:23.041275+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b0-a525-6dcc-8002-27209f42a803", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707", + "parent_checkpoint_id": "1f1a99b0-a525-6dcc-8002-27209f42a803" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + }, + "next": [], + "tasks": [], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-3f52-7383-8125-272822ea9199", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 5, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "0b55dcf1-174e-4c9e-b716-fccf15b1b5cd" + }, + "created_at": "2026-09-06T02:31:26.702631+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b0-f4e8-69e0-8005-02c549e61361", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b0-d203-68b2-8004-e2dbe78f0579", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b0-f4e8-69e0-8005-02c549e61361", + "parent_checkpoint_id": "1f1a99b0-d203-68b2-8004-e2dbe78f0579" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + }, + "next": [ + "generate_title" + ], + "tasks": [ + { + "id": "1e7d7b21-1926-9d0e-727f-a53c61f25b6c", + "name": "generate_title", + "path": [ + "__pregel_pull", + "generate_title" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": {} + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-3f52-7383-8125-272822ea9199", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 4, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "0b55dcf1-174e-4c9e-b716-fccf15b1b5cd" + }, + "created_at": "2026-09-06T02:31:23.043645+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b0-d203-68b2-8004-e2dbe78f0579", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b0-d203-68b2-8004-e2dbe78f0579", + "parent_checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 9562, + "output_tokens": 560, + "total_tokens": 10122, + "input_token_details": { + "cache_read": 9216 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [ + "attach_citations" + ], + "tasks": [ + { + "id": "dfba0e77-4c7c-cff0-21b5-1e2a4dd2c275", + "name": "attach_citations", + "path": [ + "__pregel_pull", + "attach_citations" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": { + "messages": [ + { + "content": "", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "remove", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNB2xRsO-N6mXlvzWFrDPdtcNqjwu3kIAuXPMnyubp8TUDGAkb4A8dtQbKjk7wUN_EKnNW4p576Bq2kEs_qW3T9FNd3EO7BelpLFsGqteYPfYKpHcyTLF018uX6NPBgD3KfyoCnpcrBtVcT47BYQDETmDxm_aG30rfYrpIHYDcdBHYBO_6-iAJMge1gPO2hpqoNIlDyLmDL5heVtiAvIVQt-2qqDBAABseqqBK16Ll0Okc6_esIduSJPIEtnscQQ0iTLFP5lqwgYvJegnJAkk53bOw4Yfohp8Hwb1ug8b1r88ycubgZVSRBExTdIxeUKTpA36NCJSFDkxDumOsHkktJ_RmEYpEdcjwQdvVkm1C3jmuOtynnuJfiGOQjctVDEB_O_x4Tg4yKMgjAnJNJAecjnhonUxLZGSxMj5KMdZw0EQ-XxNkKLxiBtvYBzIx18E-zceM6wyVzSo6aEboHrpIa0LWNu_XSPN1SGSpVgAt-dhWBQNU20OjWp5sDXx7RHKCnLtGGD4EHWYuJdB0sO92ak-IP-_XvIDLMk737k5P-LDesl1KM7L-zLG5wJlUJR_naj8Ig8AdkXOeS2d8x47IKcSCe-GerXed-muHJ0eIx-ubTRKpjLmXq5vOQZAe9Hy3Tk8LqI6fJalq8gXNLAD2qmRDboyV6B1uPU2_BKvp4W7ngJIhO40lyEdZnKqiztiEOtIQTbWzasZBdSENOddsFAjquUclgx_VwxwYnGb2TIO1XATmG9xUdblX8dro9SftyEwPiyYxxknHXsW7b8NGVINYaHihvaaqnRibk8VPqJqmLtTKdk1FuX2egYaXf7K2JOiSMaRMPzfXBlTFExrJn9S1554cDr-zy59VS4Z0Dg-gNz6djAmStpFcAgHOCx_P7CVugbSUUbD7LT6PAvAQNsJkCQjc-zs_gmBVYMqnYTIjByAQcixZFawz4d2jUjTRCzaMF7-0r8qsXC7n03XByoS1d1hbzQa9LIM28kD04noORGFjlWFiU67RS6E8v-4L0iyjnb2JhhmOA1W09nxhxnHhMDU1SDThVytW5yW2QbL-kseznFNJOLVQYpeh6BdeXpPqJbOsnEQL1bCrt774ec-MxLAY6_z2ifcRGSI5h_e7MtAgy0le5-1Br4deSC7GKnkFTgLmejRmFeFGWv7ucp5tLeOHrGf78H1gAp1FBJDQA=", + "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [], + "tasks": [], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 10, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:31.985564+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-274a-665e-800a-4050097aee1a", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-2733-6d28-8009-9f717dd4e5e5", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-274a-665e-800a-4050097aee1a", + "parent_checkpoint_id": "1f1a99b1-2733-6d28-8009-9f717dd4e5e5" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [ + "generate_title" + ], + "tasks": [ + { + "id": "7f3abf8d-356d-fb08-e213-1d110b4f386b", + "name": "generate_title", + "path": [ + "__pregel_pull", + "generate_title" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": {} + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 9, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:31.976317+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-2733-6d28-8009-9f717dd4e5e5", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-272f-6840-8008-21511ac9d0e4", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-2733-6d28-8009-9f717dd4e5e5", + "parent_checkpoint_id": "1f1a99b1-272f-6840-8008-21511ac9d0e4" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [ + "attach_citations" + ], + "tasks": [ + { + "id": "10613d1e-05ac-e912-90e1-961f0250b2d1", + "name": "attach_citations", + "path": [ + "__pregel_pull", + "attach_citations" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": {} + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 8, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:31.974550+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-272f-6840-8008-21511ac9d0e4", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-0bfd-64f0-8007-7ec1fb6542a2", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-272f-6840-8008-21511ac9d0e4", + "parent_checkpoint_id": "1f1a99b1-0bfd-64f0-8007-7ec1fb6542a2" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + } + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 7, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:29.122833+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-0bfd-64f0-8007-7ec1fb6542a2", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-0bfb-665a-8006-2137ee45f165", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-0bfd-64f0-8007-7ec1fb6542a2", + "parent_checkpoint_id": "1f1a99b1-0bfb-665a-8006-2137ee45f165" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + }, + "next": [ + "generate_title" + ], + "tasks": [ + { + "id": "1e7d7b21-1926-9d0e-727f-a53c61f25b6c", + "name": "generate_title", + "path": [ + "__pregel_pull", + "generate_title" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": {} + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-3f52-7383-8125-272822ea9199", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 4, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "0b55dcf1-174e-4c9e-b716-fccf15b1b5cd" + }, + "created_at": "2026-09-06T02:31:23.043645+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b0-d203-68b2-8004-e2dbe78f0579", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b0-d203-68b2-8004-e2dbe78f0579", + "parent_checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 9562, + "output_tokens": 560, + "total_tokens": 10122, + "input_token_details": { + "cache_read": 9216 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [ + "attach_citations" + ], + "tasks": [ + { + "id": "dfba0e77-4c7c-cff0-21b5-1e2a4dd2c275", + "name": "attach_citations", + "path": [ + "__pregel_pull", + "attach_citations" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": { + "messages": [ + { + "content": "", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "remove", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNB2xRsO-N6mXlvzWFrDPdtcNqjwu3kIAuXPMnyubp8TUDGAkb4A8dtQbKjk7wUN_EKnNW4p576Bq2kEs_qW3T9FNd3EO7BelpLFsGqteYPfYKpHcyTLF018uX6NPBgD3KfyoCnpcrBtVcT47BYQDETmDxm_aG30rfYrpIHYDcdBHYBO_6-iAJMge1gPO2hpqoNIlDyLmDL5heVtiAvIVQt-2qqDBAABseqqBK16Ll0Okc6_esIduSJPIEtnscQQ0iTLFP5lqwgYvJegnJAkk53bOw4Yfohp8Hwb1ug8b1r88ycubgZVSRBExTdIxeUKTpA36NCJSFDkxDumOsHkktJ_RmEYpEdcjwQdvVkm1C3jmuOtynnuJfiGOQjctVDEB_O_x4Tg4yKMgjAnJNJAecjnhonUxLZGSxMj5KMdZw0EQ-XxNkKLxiBtvYBzIx18E-zceM6wyVzSo6aEboHrpIa0LWNu_XSPN1SGSpVgAt-dhWBQNU20OjWp5sDXx7RHKCnLtGGD4EHWYuJdB0sO92ak-IP-_XvIDLMk737k5P-LDesl1KM7L-zLG5wJlUJR_naj8Ig8AdkXOeS2d8x47IKcSCe-GerXed-muHJ0eIx-ubTRKpjLmXq5vOQZAe9Hy3Tk8LqI6fJalq8gXNLAD2qmRDboyV6B1uPU2_BKvp4W7ngJIhO40lyEdZnKqiztiEOtIQTbWzasZBdSENOddsFAjquUclgx_VwxwYnGb2TIO1XATmG9xUdblX8dro9SftyEwPiyYxxknHXsW7b8NGVINYaHihvaaqnRibk8VPqJqmLtTKdk1FuX2egYaXf7K2JOiSMaRMPzfXBlTFExrJn9S1554cDr-zy59VS4Z0Dg-gNz6djAmStpFcAgHOCx_P7CVugbSUUbD7LT6PAvAQNsJkCQjc-zs_gmBVYMqnYTIjByAQcixZFawz4d2jUjTRCzaMF7-0r8qsXC7n03XByoS1d1hbzQa9LIM28kD04noORGFjlWFiU67RS6E8v-4L0iyjnb2JhhmOA1W09nxhxnHhMDU1SDThVytW5yW2QbL-kseznFNJOLVQYpeh6BdeXpPqJbOsnEQL1bCrt774ec-MxLAY6_z2ifcRGSI5h_e7MtAgy0le5-1Br4deSC7GKnkFTgLmejRmFeFGWv7ucp5tLeOHrGf78H1gAp1FBJDQA=", + "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + } + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-3f52-7383-8125-272822ea9199", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 3, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "0b55dcf1-174e-4c9e-b716-fccf15b1b5cd" + }, + "created_at": "2026-09-06T02:31:23.041275+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b0-a525-6dcc-8002-27209f42a803", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b0-d1fd-6ca0-8003-41ec54884707", + "parent_checkpoint_id": "1f1a99b0-a525-6dcc-8002-27209f42a803" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [ + "__start__" + ], + "tasks": [ + { + "id": "13100c18-4874-b850-2302-61fa9e14e3d6", + "name": "__start__", + "path": [ + "__pregel_pull", + "__start__" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": { + "messages": [ + { + "type": "human", + "role": "human", + "content": "Make it a haiku instead." + } + ] + } + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-83a9-7cf3-83c5-00e24cb70205", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "input", + "step": 11, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "bad13f93-9e40-4ef6-ba3b-b01eeea9b3be" + }, + "created_at": "2026-09-06T02:31:33.038949+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-3156-6238-800b-b73e3d43a61b", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-274a-665e-800a-4050097aee1a", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-3156-6238-800b-b73e3d43a61b", + "parent_checkpoint_id": "1f1a99b1-274a-665e-800a-4050097aee1a" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [], + "tasks": [], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 10, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:31.985564+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-274a-665e-800a-4050097aee1a", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-2733-6d28-8009-9f717dd4e5e5", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-274a-665e-800a-4050097aee1a", + "parent_checkpoint_id": "1f1a99b1-2733-6d28-8009-9f717dd4e5e5" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [ + "generate_title" + ], + "tasks": [ + { + "id": "7f3abf8d-356d-fb08-e213-1d110b4f386b", + "name": "generate_title", + "path": [ + "__pregel_pull", + "generate_title" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": {} + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 9, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:31.976317+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-2733-6d28-8009-9f717dd4e5e5", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-272f-6840-8008-21511ac9d0e4", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-2733-6d28-8009-9f717dd4e5e5", + "parent_checkpoint_id": "1f1a99b1-272f-6840-8008-21511ac9d0e4" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + }, + "next": [ + "attach_citations" + ], + "tasks": [ + { + "id": "10613d1e-05ac-e912-90e1-961f0250b2d1", + "name": "attach_citations", + "path": [ + "__pregel_pull", + "attach_citations" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": {} + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 8, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:31.974550+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-272f-6840-8008-21511ac9d0e4", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-0bfd-64f0-8007-7ec1fb6542a2", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-272f-6840-8008-21511ac9d0e4", + "parent_checkpoint_id": "1f1a99b1-0bfd-64f0-8007-7ec1fb6542a2" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. 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They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10105, + "output_tokens": 196, + "total_tokens": 10301, + "input_token_details": { + "cache_read": 8704 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + } + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 7, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:29.122833+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-0bfd-64f0-8007-7ec1fb6542a2", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-0bfb-665a-8006-2137ee45f165", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-0bfd-64f0-8007-7ec1fb6542a2", + "parent_checkpoint_id": "1f1a99b1-0bfb-665a-8006-2137ee45f165" + }, + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + } + ] + }, + "next": [ + "__start__" + ], + "tasks": [ + { + "id": "de3dad53-9604-033c-bbfd-8ebcd143a229", + "name": "__start__", + "path": [ + "__pregel_pull", + "__start__" + ], + "error": null, + "interrupts": [], + "checkpoint": null, + "state": null, + "result": { + "messages": [ + { + "type": "human", + "role": "human", + "content": "Shorter, please." + } + ] + } + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-6f42-7160-a8dc-79c80886fa6f", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "input", + "step": 6, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "203d4e62-2533-4267-8810-9dbbab98ea55" + }, + "created_at": "2026-09-06T02:31:29.122045+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-0bfb-665a-8006-2137ee45f165", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b0-f4e8-69e0-8005-02c549e61361", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-0bfb-665a-8006-2137ee45f165", + "parent_checkpoint_id": "1f1a99b0-f4e8-69e0-8005-02c549e61361" + } + ] + }, + { + "afterRun": 6, + "states": [ + { + "values": { + "messages": [ + { + "content": "Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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Cite each source inline as [^doc-id] using the document `id` field returned by the tool.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "84741d5e-63f5-4999-abb5-2e5aaef887d9" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd075d89087d0b0c42022ae989869", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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+ "index": 0 + }, + { + "type": "text", + "text": "Signals hold, spread change \nComputed blooms, effects wake — clear \nBridges to Rx flow", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd085b15087d087efbebc0e357917" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "created_at": 1788661893, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10300, + "output_tokens": 37, + "total_tokens": 10337, + "input_token_details": { + "cache_read": 9984 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Clean up our old database backups, anything 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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+ "index": 0 + }, + { + "type": "text", + "text": "Signals hold, spread change \nComputed blooms, effects wake — clear \nBridges to Rx flow", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd085b15087d087efbebc0e357917" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "created_at": 1788661893, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd08533d487d0bd7e0884aa42dc83", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 10300, + "output_tokens": 37, + "total_tokens": 10337, + "input_token_details": { + "cache_read": 9984 + }, + "output_token_details": { + "reasoning": 0 + } + } + }, + { + "content": "Clean up our old database backups, anything 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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built-in syntax.\"}]", + "additional_kwargs": {}, + "response_metadata": {}, + "type": "tool", + "name": "search_documents", + "id": "cf05c76f-3b55-4b78-927c-7fae537c2c70", + "tool_call_id": "call_pDJGIjzsgSIfkCGOAVA9eboo", + "artifact": null, + "status": "success" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd076ea1087d0b845230d1107e8b2", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). They remove manual subscription management and enable synchronous dependency tracking[^ng-signals-overview].\n\nWhen to use them\n- Use signals for component-local state and computed view-model values to simplify code and avoid manual subscriptions.\n- Use computed signals for derived values and effects for side effects triggered by changes.\n- Keep using Observables when you need stream semantics (operators, cancellation); bridge with toSignal()/toObservable() when needed[^ng-signals-overview][^ng-signals-rxjs].\n\nWant a one-line code example for each (writable, computed, Observable→signal)?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd081fa7487d095a4d4a576a87cc6" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd081490487d08031d28a4dd8c9ae", + "created_at": 1788661889, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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+ "index": 0 + }, + { + "type": "text", + "text": "Sources I found:\n- Angular guide: \"Signals\"[^ng-signals-overview]\n- Angular guide: \"RxJS interop with signals\"[^ng-signals-rxjs]\n\nWhat Angular signals are\n- Signals are a built-in reactivity primitive in Angular for representing values that change over time. A signal holds a value and notifies dependents automatically when that value changes, so code that reads the signal re-evaluates/reacts without manual subscription management[^ng-signals-overview].\n- There are a few related primitives: writable signals (you can set their value), computed signals (derive a value from other signals), and effects (run imperative code in response to signal changes) — together these let you express reactive data flow in the app[^ng-signals-overview].\n\nHow they behave (short)\n- Reading a signal registers a dependency; when the signal is updated, Angular re-runs computed signals and effects that depend on it.\n- Signals are synchronous by default: updates propagate immediately to dependents.\n- Signals interoperate with existing RxJS Observables via helpers like toSignal() and toObservable() to convert between the two forms of reactivity[^ng-signals-rxjs].\n\nWhen to use signals\n- Use signals when you want simpler, explicit local state and reactive derivations without the boilerplate of subscriptions and change-detection hacks. They reduce the need to manually manage subscriptions, Subjects, or manual change detection for many common patterns[^ng-signals-overview].\n- Prefer signals for component-local state or derived view-model values where synchronous, fine-grained reactivity is helpful (e.g., computed values used by the template).\n- Use computed signals to encapsulate derived logic instead of recomputing in templates or in getters that trigger extra change detection work.\n- Use effects for side effects that should run in response to signal changes (e.g., logging, imperatively updating non-Angular APIs).\n- When you already use RxJS streams across many layers, continue using Observables; convert when needed. Signals are complementary to RxJS — use toSignal/toObservable when bridging between the two models rather than rewriting everything at once[^ng-signals-rxjs][^ng-signals-overview].\n\nConcise recommendation\n- Adopt signals for component and local state that benefits from direct, synchronous dependency tracking and simpler code (computed values + effects).\n- Keep using Observables where their stream semantics (time, cancellation, complex operators) are required, and bridge between the two when appropriate[^ng-signals-overview][^ng-signals-rxjs].\n\nWould you like short examples showing a writable signal, a computed signal, and converting an Observable to a signal?", + "index": 1, + "id": "msg_04b2ec840244feb0006a9cd07701c487d0b4aa7a78c2eece42" + } + ], + "additional_kwargs": { + "citations": [ + { + "id": "ng-signals-overview", + "index": 1, + "title": "Signals — Angular guide", + "url": "https://angular.dev/guide/signals", + "snippet": "Signals are a reactivity primitive that lets you describe values that change over time without manual subscriptions." + }, + { + "id": "ng-signals-rxjs", + "index": 2, + "title": "RxJS interop with signals", + "url": "https://angular.dev/guide/signals/rxjs-interop", + "snippet": "toSignal() and toObservable() bridge between RxJS Observables and signals." + }, + { + "id": "ng-control-flow", + "index": 3, + "title": "Built-in control flow — @if, @for, @switch", + "url": "https://angular.dev/guide/templates/control-flow", + "snippet": "Native template control flow replaces structural directives like *ngIf and *ngFor with built-in syntax.", + "sourceType": "file" + } + ] + }, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "created_at": 1788661878, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd07682a087d0983187de097e08a0", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": null + }, + { + "content": "Shorter, please.", + "additional_kwargs": { + "type": "human" + }, + "response_metadata": {}, + "type": "human", + "name": null, + "id": "f3da9887-66a9-4a1f-a04c-627bf5be2973" + }, + { + "content": [ + { + "id": "rs_04b2ec840244feb0006a9cd081e17487d0aac502943ed8a245", + "summary": [], + "type": "reasoning", + "content": [], + "encrypted_content": "gAAAAABqnNCBRj8uGTXT8eKNGKSogWSj-IlqAkyGmEu-171emTJajibYxzd5344vY-K322a_MOpWxgTzWAOKFJu0-WU0QSZRKeupjed9MmbhlrBxMzzyEtQl8ZYRKgNMsziCwZFasltH9-i6ak8bQdMPvt2KKK9Nctj9SBfpTzc0BopyKm5MU-PPhP3w5qUlCrNVH00XMMbrC98Bt-4m2GaoNfDAaY6ZJVIfq_7y4U1xqy_56nSSLP8lxbZsc2NZcjxsJj0f5Sp9xb0NBoUsV8_BSmkURfwCsvWUGpS_JYFuJrWqDFKIESFenZzyTZgKjsIQRYwzCWzfraWAgxLD35fr4lcbrybtS305dS9PN450A-oq3aXBTV3wBRvUkvahs8EwyDsPDq2vje9OAH1qG7uBANIPTCbHOUqiKWzOTRDeemdgxmw59XrxtSSjfBS9K5U0JSO1vjE029pMaTYadTiW0reFlei0KAjTYTHxfODs5oJy5X9vEJUk53wJ7e7NRUck-tckhFuVm57hhR0Ixeb5vaMilU93_FMoN8ogFB2HosORc4LmIQpd819HsBkAyNUEXD9qmHCkVlKe0ghHKwfPwROtwSVsm3YKouAF8JxPy6Kf6s1iq5k_LFkyikcbxtxcxE0514s0ChlGLPrXr062v5W0a7LtEowbf9GhiKBhJZ_wwc_qL2vKtEfjQjker0vJKw9ruP08mVEDUOnVvsw_PjTVHi1BXImaFt-rManlA4vbgtcXEli4go2adZrRfn3IYo7skoRrNq3g7vyJrhqZ4FpoB5ZW2izCZzfne69D2C7GEaiOk09IXYvaziVdwnIoWAQOKFat_PeTqfUl4MhhlhunD-i7kkmTR2U6j90l7ojQdnF5SB4pitzFmx7V4xumiXuYr_b-6FKFZw00whYA_j28ug2je9iXtdV5g7wwKd4Wwh2HkDqCYSSbcKgIFS84lYIxc2ZoL11cH3ds5jbGHVNsH5PWtHhsz7NR62NIKUVOE12bCjt6l5xyM0IrjuANnX7n4ES8pOTjIviji0P7w3VQS3V6VwP9Qk8-wT1YB-tP4CMYxs08LW9cPjdyinUKmy153E20ig4WGM_DEBSIvHyKiauP3jsFhOH6oyV6E8bAKpz3PruxHOkwJfDMZP-tunjIlRauBz8wjYb07z6_qEWuWPmf5ZxBxQ4bW4fsrIgrbg9Er7g=", + "index": 0 + }, + { + "type": "text", + "text": "Sources: Angular Signals guide[^ng-signals-overview] and RxJS interop[^ng-signals-rxjs].\n\nWhat they are\n- Signals are Angular’s built-in reactive primitive that hold a value and automatically notify dependents when the value changes (writable signals, computed signals, and effects). 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I kept backups marked retain (bk-2026-03-15-prod and bk-2025-12-31-prod) because they are under retention hold.", + "index": 0, + "id": "msg_04b2ec840244feb0006a9cd090af4087d096f28b33f8d39bb5" + } + ], + "additional_kwargs": {}, + "response_metadata": { + "model_provider": "openai", + "id": "resp_04b2ec840244feb0006a9cd08f8e8487d0b88674777d061668", + "created_at": 1788661903, + "metadata": {}, + "model": "gpt-5-mini-2025-08-07", + "object": "response", + "service_tier": "default", + "status": "completed", + "model_name": "gpt-5-mini-2025-08-07" + }, + "type": "ai", + "name": null, + "id": "resp_04b2ec840244feb0006a9cd08f8e8487d0b88674777d061668", + "tool_calls": [], + "invalid_tool_calls": [], + "usage_metadata": { + "input_tokens": 11011, + "output_tokens": 80, + "total_tokens": 11091, + "input_token_details": { + "cache_read": 10880 + }, + "output_token_details": { + "reasoning": 0 + } + } + } + ] + } + } + ], + "metadata": { + "graph_id": "chat", + "assistant_id": "eb6db400-e3c8-5d06-a834-015cb89efe69", + "user_id": "", + "created_by": "system", + "title": "Angular signals explanation and usage", + "run_attempt": 1, + "langgraph_version": "1.1.10", + "langgraph_api_version": "0.8.7", + "langgraph_plan": "enterprise", + "langgraph_host": "self-hosted", + "langgraph_api_url": "http://127.0.0.1:2024", + "run_id": "01a0748e-ab4f-7381-b7cf-f1b8dd9648cf", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "source": "loop", + "step": 23, + "parents": {}, + "langgraph_auth_user_id": "", + "langgraph_request_id": "50791ea9-740a-415e-8a56-f83669a4a74e" + }, + "created_at": "2026-09-06T02:31:43.346835+00:00", + "checkpoint": { + "checkpoint_id": "1f1a99b1-93a3-6e36-8017-67ad44f3e60b", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "parent_checkpoint": { + "checkpoint_id": "1f1a99b1-8836-6ea4-8016-405a22e9ffcd", + "thread_id": "01a0748e-3f3e-7842-ac56-8a90b5cbd352", + "checkpoint_ns": "" + }, + "interrupts": [], + "checkpoint_id": "1f1a99b1-93a3-6e36-8017-67ad44f3e60b", + "parent_checkpoint_id": "1f1a99b1-8836-6ea4-8016-405a22e9ffcd" + } + ] + } + ] +} diff --git a/examples/chat/angular/src/app/app.routes.ts b/examples/chat/angular/src/app/app.routes.ts index 2b34b180a..ed132109d 100644 --- a/examples/chat/angular/src/app/app.routes.ts +++ b/examples/chat/angular/src/app/app.routes.ts @@ -35,6 +35,11 @@ export const routes: Routes = [ pathMatch: 'full', loadComponent: () => import('./hero/hero-mode.component').then((m) => m.HeroMode), }, + { + path: 'stage', + pathMatch: 'full', + loadComponent: () => import('./stage/stage-mode.component').then((m) => m.StageMode), + }, { path: '', loadComponent: () => diff --git a/examples/chat/angular/src/app/stage/stage-bridge.spec.ts b/examples/chat/angular/src/app/stage/stage-bridge.spec.ts new file mode 100644 index 000000000..678b39a23 --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-bridge.spec.ts @@ -0,0 +1,50 @@ +import { describe, expect, it, vi } from 'vitest'; +import { createStageBridge, STAGE_MESSAGE_TYPE } from './stage-bridge'; + +function env(referrer = 'https://threadplane.ai/') { + const listeners: ((e: MessageEvent) => void)[] = []; + const parent = { postMessage: vi.fn() } as unknown as Window; + const self = { + addEventListener: (_: string, cb: (e: MessageEvent) => void) => listeners.push(cb), + removeEventListener: vi.fn(), + } as unknown as Window; + return { + referrer, + parent, + self, + fire: (data: unknown, origin = 'https://threadplane.ai', source: unknown = parent) => + listeners.forEach((l) => l({ data, origin, source } as MessageEvent)), + }; +} + +describe('createStageBridge', () => { + it('delivers seek targets from an allowlisted parent and ignores others', () => { + const e = env(); + const bridge = createStageBridge({ referrer: e.referrer, parent: e.parent, self: e.self }); + const seen: number[] = []; + bridge.onSeek((t) => seen.push(t)); + e.fire({ type: STAGE_MESSAGE_TYPE, t: 1200 }); + e.fire({ type: STAGE_MESSAGE_TYPE, t: 5 }, 'https://evil.example'); + e.fire({ type: 'other', t: 7 }); + e.fire({ type: STAGE_MESSAGE_TYPE, t: 'nope' }); + expect(seen).toEqual([1200]); + }); + + it('posts ready and applied state to the parent only', () => { + const e = env(); + const bridge = createStageBridge({ referrer: e.referrer, parent: e.parent, self: e.self }); + bridge.postReady({ totalMs: 9000, beats: [{ beat: 'stream', startMs: 0, endMs: 1000 }] }); + bridge.postState({ applied: 3, phase: 'stream', t: 120 }); + expect((e.parent.postMessage as ReturnType).mock.calls.map((c) => c[0])).toEqual([ + { type: STAGE_MESSAGE_TYPE, ready: true, totalMs: 9000, beats: [{ beat: 'stream', startMs: 0, endMs: 1000 }] }, + { type: STAGE_MESSAGE_TYPE, applied: 3, phase: 'stream', t: 120 }, + ]); + }); + + it('posts nothing when not embedded', () => { + const e = env(); + const bridge = createStageBridge({ referrer: '', parent: e.self, self: e.self }); + bridge.postState({ applied: 1, phase: 'stream', t: 0 }); + expect(e.parent.postMessage).not.toHaveBeenCalled(); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-bridge.ts b/examples/chat/angular/src/app/stage/stage-bridge.ts new file mode 100644 index 000000000..7aadc92b5 --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-bridge.ts @@ -0,0 +1,77 @@ +import { isAllowedParentOrigin } from '../hero/hero-bridge'; +import type { StagePhase, TimelineBeat } from './stage-timeline'; + +export const STAGE_MESSAGE_TYPE = 'tplane-stage'; + +export interface StageReady { + totalMs: number; + beats: readonly TimelineBeat[]; +} + +export interface StageState { + applied: number; + phase: StagePhase; + t: number; +} + +export interface StageBridge { + onSeek(cb: (t: number) => void): () => void; + postReady(ready: StageReady): void; + postState(state: StageState): void; +} + +interface BridgeEnv { + referrer: string; + parent: Window; + self: Window; +} + +function originOf(url: string): string | null { + try { + return new URL(url).origin; + } catch { + return null; + } +} + +/** + * The parent page owns scroll and posts `{ type: 'tplane-stage', t }`; the + * frame answers with `{ ready, totalMs, beats }` once and `{ applied, phase, t }` + * whenever its applied state changes. Same origin allowlist as the hero. + */ +export function createStageBridge(env: BridgeEnv): StageBridge { + const fromReferrer = originOf(env.referrer); + let parentOrigin: string | null = + fromReferrer !== null && isAllowedParentOrigin(fromReferrer) ? fromReferrer : null; + const embedded = env.parent !== env.self; + const post = (msg: Record) => { + if (!embedded || parentOrigin === null) return; + env.parent.postMessage({ type: STAGE_MESSAGE_TYPE, ...msg }, parentOrigin); + }; + return { + onSeek(cb) { + const handler = (e: MessageEvent) => { + if (e.source !== env.parent) return; + if (!isAllowedParentOrigin(e.origin)) return; + const d = e.data as { type?: string; t?: unknown } | null; + if (!d || d.type !== STAGE_MESSAGE_TYPE || typeof d.t !== 'number' || !Number.isFinite(d.t)) return; + // Under a strict Referrer-Policy the referrer is empty, so the first + // allowlisted message is how the frame learns where to answer. + if (parentOrigin === null) parentOrigin = e.origin; + cb(d.t); + }; + env.self.addEventListener('message', handler); + return () => env.self.removeEventListener('message', handler); + }, + postReady(ready) { + post({ ready: true, totalMs: ready.totalMs, beats: ready.beats }); + }, + postState(state) { + post({ applied: state.applied, phase: state.phase, t: state.t }); + }, + }; +} + +export function browserStageBridge(): StageBridge { + return createStageBridge({ referrer: document.referrer, parent: window.parent, self: window }); +} diff --git a/examples/chat/angular/src/app/stage/stage-controller.spec.ts b/examples/chat/angular/src/app/stage/stage-controller.spec.ts new file mode 100644 index 000000000..7c6e94203 --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-controller.spec.ts @@ -0,0 +1,117 @@ +import { describe, expect, it, beforeEach } from 'vitest'; +import { TestBed } from '@angular/core/testing'; +import { createEnvironmentInjector, EnvironmentInjector, signal } from '@angular/core'; +import { createAgentRef } from '@threadplane/chat'; +import { provideAgent, type LangGraphAgent } from '@threadplane/langgraph'; +import { StageReplayTransport } from './stage-replay.transport'; +import { StageController } from './stage-controller'; +import { buildTimeline } from './stage-timeline'; +import type { StageRecording } from './stage-recording.types'; + +const human = (id: string, content: string) => ({ id, type: 'human', content }); +const ai = (id: string, content: string) => ({ id, type: 'ai', content }); +const values = (tMs: number, messages: unknown[], extra: Record = {}) => + ({ tMs, event: { type: 'values', messages, ...extra } as never }); + +/** A recording whose events are `values` snapshots, which the bridge applies directly. */ +const REC: StageRecording = { + version: 2, recordedAt: '2026-09-06T00:00:00.000Z', threadId: 'thread-1', + runs: [ + { beat: 'stream', action: { kind: 'submit', message: 'Q1' }, events: [values(0, [human('h1', 'Q1')]), values(100, [human('h1', 'Q1'), ai('a1', 'A1')])] }, + { beat: 'persist', action: { kind: 'reload' }, events: [] }, + { beat: 'persist', action: { kind: 'submit', message: 'Q2' }, events: [values(0, [human('h1', 'Q1'), ai('a1', 'A1'), human('h2', 'Q2'), ai('a2', 'A2')])] }, + { beat: 'persist', action: { kind: 'submit', message: 'Q3', checkpointIndex: 0 }, events: [values(0, [human('h1', 'Q1'), ai('a1', 'A1'), human('h3', 'Q3'), ai('a3', 'A3')])] }, + { beat: 'approve', action: { kind: 'submit', message: 'Clean up' }, events: [values(0, [human('h4', 'Clean up')]), values(200, [human('h4', 'Clean up')], { __interrupt__: [{ value: { type: 'approval_request', reason: 'Delete 3' } }] })] }, + { beat: 'approve', action: { kind: 'resume', value: 'approved' }, events: [values(0, [human('h4', 'Clean up'), ai('a4', 'Deleted 3')])] }, + { beat: 'render', action: { kind: 'submit', message: 'Form' }, events: [values(0, [human('h4', 'Clean up'), ai('a4', 'Deleted 3'), human('h5', 'Form'), ai('a5', '---a2ui_JSON---')])] }, + ], + histories: [{ afterRun: 1, states: [{ values: { messages: [human('h1', 'Q1'), ai('a1', 'A1')] }, checkpoint: { checkpoint_id: 'cp-1' } } as never] }], +}; + +const REF = createAgentRef>('stage-test'); + +function until(pred: () => boolean, ms = 2000): Promise { + const start = Date.now(); + return new Promise((resolve, reject) => { + const tick = () => { if (pred()) return resolve(); if (Date.now() - start > ms) return reject(new Error('timeout')); setTimeout(tick, 5); }; + tick(); + }); +} +const text = (m: unknown) => String((m as { content?: unknown }).content ?? ''); + +describe('StageController against the real LangGraph agent', () => { + let transport: StageReplayTransport; + let agent: LangGraphAgent; + let controller: StageController; + const tl = buildTimeline(REC); + + beforeEach(async () => { + TestBed.configureTestingModule({}); + transport = new StageReplayTransport(async () => REC); + const injector = createEnvironmentInjector( + provideAgent(REF, { assistantId: 'stage', transport, threadId: signal(null), transcriptNodeNames: ['generate'] }), + TestBed.inject(EnvironmentInjector), + ); + agent = injector.get(REF.token) as LangGraphAgent; + controller = new StageController(agent, transport, await transport.ready(), REC); + }); + + it('seeking forward performs each run\'s action and applies events up to t', async () => { + await controller.seek(0); + await until(() => agent.messages().length === 1); + expect(controller.phase()).toBe('stream'); + await controller.seek(tl.runs[0].endMs); + await until(() => agent.messages().length === 2); + expect(controller.applied()).toBe(2); + }); + + it('the reload run blanks and restores the transcript from recorded history', async () => { + await controller.seek(tl.runs[1].startMs); + await until(() => agent.messages().length === 2 && agent.history().length === 1); + expect(agent.history()[0]?.id).toBe('cp-1'); + }); + + it('holds at the interrupt: seeking inside the hold does not resume', async () => { + await controller.seek(tl.hold.startMs + 1); + await until(() => !!agent.interrupt?.()); + expect(controller.phase()).toBe('pause'); + const before = agent.messages().length; + await controller.seek(tl.hold.endMs - 1); + await new Promise((r) => setTimeout(r, 30)); + expect(agent.messages().length).toBe(before); + expect(agent.interrupt?.()).toBeTruthy(); + }); + + it('crossing the hold resumes and the audit lands', async () => { + await controller.seek(tl.runs[5].endMs); + await until(() => agent.messages().some((m) => text(m).includes('Deleted 3'))); + expect(agent.interrupt?.()).toBeFalsy(); + expect(controller.phase()).toBe('resume'); + }); + + it('rewinding resets and fast-forwards to an earlier point', async () => { + await controller.seek(tl.totalMs); + await until(() => agent.messages().some((m) => text(m).includes('a2ui'))); + await controller.seek(tl.runs[0].endMs); + await until(() => agent.messages().length === 2 && !agent.messages().some((m) => text(m).includes('a2ui'))); + expect(controller.phase()).toBe('stream'); + }); + + it('resolves a seek only once the events for its target are applied', async () => { + // No until(): resolution alone must imply the stage is showing the target. + // The intermediate target is coalesced into the last pass and never + // applied on its own, so both callers settle on the final one. + await Promise.all([controller.seek(10), controller.seek(tl.runs[0].endMs)]); + expect(agent.messages().length).toBe(2); + expect(controller.applied()).toBe(2); + }); + + it('coalesces bursts: many seeks in one frame perform each action once', async () => { + const submits: unknown[] = []; + const original = agent.submit.bind(agent); + (agent as { submit: LangGraphAgent['submit'] }).submit = ((input, opts) => { submits.push(input); return original(input, opts); }) as LangGraphAgent['submit']; + await Promise.all([controller.seek(10), controller.seek(20), controller.seek(tl.runs[0].endMs)]); + await until(() => agent.messages().length === 2); + expect(submits.length).toBe(1); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-controller.ts b/examples/chat/angular/src/app/stage/stage-controller.ts new file mode 100644 index 000000000..0b5963c49 --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-controller.ts @@ -0,0 +1,239 @@ +import { computed, signal, type Signal } from '@angular/core'; +import type { LangGraphAgent } from '@threadplane/langgraph'; +import type { StageRecording, StageRun } from './stage-recording.types'; +import { phaseReachedAt, runsStartedBy, type StagePhase, type StageTimeline, type TimelineRun } from './stage-timeline'; +import type { StageReplayTransport } from './stage-replay.transport'; + +/** + * BOUNDARY CONVENTION. Two different questions are asked about the same + * instant, and they answer differently on purpose: + * + * - ACTIONS are performed INCLUSIVELY at a run's `startMs`. Reaching a run's + * start means that run's action has fired, so its first events (recorded at + * tMs 0) are ready at that same instant. + * - `phase()` names the moment RENDERED, which is `t` minus an epsilon (see + * `phaseReachedAt`). Runs are laid end to end, so a run's end is the next + * run's start; at that instant the outgoing run still owns the frame. + * + * Consumers must therefore NOT infer which action has fired from `phase()`: + * at a boundary `phase()` still names the outgoing run while the incoming + * run's action has already been performed. + */ + +/** Ceiling on how long a drain waits for the agent to go idle before moving on. */ +const SETTLE_TIMEOUT_MS = 2000; +/** Ceiling on how long we wait to OBSERVE a performed run starting. */ +const RUN_START_TIMEOUT_MS = 500; +/** Ceiling on how long a seek waits for the transport's events to be applied. */ +const APPLY_TIMEOUT_MS = 2000; + +/** One `seek()` caller, waiting for a pass that reaches its target. */ +interface SeekWaiter { + readonly target: number; + readonly resolve: () => void; +} + +/** + * Drives the replay agent to any recorded time. + * + * Forward: for each run whose start has been crossed and not yet performed, + * drain the previous run to that run's start, then perform this run's recorded + * action (submit / resume / reload), and finally open the transport's gate to + * `t`. Backward: reset the agent and the transport, then fast-forward. Seeks + * are coalesced so a burst inside one frame performs each action once, and a + * seek that arrives while one is in flight is applied after it, never + * concurrently — the agent's submit path is not re-entrant. + * + * `seek(t)` resolves only once a pass has completed AND the events recorded at + * or before its target have been applied, so `await seek(t)` implies the stage + * is showing t. A target that is superseded by a later seek is never applied + * on its own — it is coalesced into the last pass, and its waiters resolve + * when that pass completes. + */ +export class StageController { + private performed = -1; + private target = 0; + private inFlight: Promise | null = null; + private pending: number | null = null; + private waiters: SeekWaiter[] = []; + private readonly tSig = signal(0); + readonly phase = computed(() => phaseReachedAt(this.timeline, this.tSig())); + /** Events the transport has yielded since the last reset. */ + readonly applied: Signal; + readonly t = this.tSig.asReadonly(); + + constructor( + private readonly agent: LangGraphAgent, + private readonly transport: StageReplayTransport, + private readonly timeline: StageTimeline, + private readonly recording: StageRecording, + ) { + // Assigned here rather than in a field initializer: parameter properties + // are not bound until the constructor body runs. + this.applied = transport.appliedSignal; + } + + seek(t: number): Promise { + const clamped = Math.max(0, Math.min(this.timeline.totalMs, t)); + const waited = new Promise((resolve) => this.waiters.push({ target: clamped, resolve })); + if (this.inFlight) this.pending = clamped; + else this.dispatch(clamped); + return waited; + } + + private dispatch(t: number): void { + this.inFlight = this.run(t) + .catch((err: unknown) => console.warn('[stage] seek failed', err)) + .finally(() => { + this.inFlight = null; + const next = this.pending; + this.pending = null; + // A superseded target is never applied on its own: its waiters ride + // the last pass, so they are only released once no pass is pending. + if (next !== null) { + this.dispatch(next); + this.release((w) => w.target === t); + return; + } + this.release(() => true); + }); + } + + private release(match: (w: SeekWaiter) => boolean): void { + const kept: SeekWaiter[] = []; + for (const w of this.waiters) { + if (match(w)) w.resolve(); + else kept.push(w); + } + this.waiters = kept; + } + + private async run(t: number): Promise { + if (t < this.target) this.reset(); + this.target = t; + this.tSig.set(t); + if (this.performed < 0) { + this.agent.switchThread(this.recording.threadId); + await this.drain(-1); + } + for (const entry of runsStartedBy(this.timeline, t)) { + if (entry.index <= this.performed) continue; + // Drain the previous run to this run's start before acting: the agent's + // submit path aborts whatever stream is open, so acting early would + // truncate the run being replaced. + this.transport.seek(entry.startMs); + if (this.performed >= 0) await this.drain(this.performed); + this.performed = entry.index; + this.perform(entry.run); + await this.observeStart(entry); + } + this.transport.seek(t); + await this.awaitApplied(t); + } + + private reset(): void { + this.performed = -1; + this.target = 0; + this.agent.switchThread(null); + this.transport.reset(); + } + + private perform(run: StageRun): void { + const action = run.action; + switch (action.kind) { + case 'submit': { + let checkpointId: string | undefined; + if (action.checkpointIndex !== undefined) { + checkpointId = this.agent.history()[action.checkpointIndex]?.id; + if (!checkpointId) { + console.warn('[stage] fork checkpoint missing', { checkpointIndex: action.checkpointIndex }); + } + } + void this.agent.submit( + { message: action.message }, + checkpointId ? ({ checkpointId } as never) : undefined, + ); + return; + } + case 'resume': + void this.agent.submit(null, { command: { resume: action.value } } as never); + return; + case 'reload': + // A simulated page reload: drop the thread (which aborts the open + // stream and blanks the transcript), then re-adopt it so the bridge + // restores it from the recorded history snapshot. + this.agent.switchThread(null); + this.agent.switchThread(this.recording.threadId); + return; + } + } + + /** + * Waits until a run we just performed has visibly STARTED — the agent + * reports loading, or the transport yielded an event. Gating on an + * observation rather than on a status read taken before the first await is + * what makes the following drain meaningful: `submit()` is asynchronous, so + * a pre-await read of `isLoading()` can still be false and let the drain + * fall straight through. A reload has no stream to observe. + */ + private async observeStart(entry: TimelineRun): Promise { + if (entry.run.action.kind === 'reload') return; + const before = this.transport.applied(); + const deadline = Date.now() + RUN_START_TIMEOUT_MS; + while (!this.agent.isLoading() && this.transport.applied() === before) { + if (Date.now() > deadline) { + console.warn('[stage] settle timed out', { run: entry.index }); + return; + } + await macrotask(); + } + } + + /** Waits for the agent to go idle, so the next action starts from a settled transcript. */ + private async drain(runIndex: number): Promise { + const deadline = Date.now() + SETTLE_TIMEOUT_MS; + while (this.agent.isLoading() || this.agent.isThreadLoading()) { + if (Date.now() > deadline) { + console.warn('[stage] settle timed out', { run: runIndex }); + return; + } + await macrotask(); + } + } + + /** + * Waits until every event recorded at or before `t` has been yielded by the + * transport, and then for one quiet macrotask so the bridge has applied the + * last of them. This is what lets `await seek(t)` imply "the stage shows t" + * without the caller polling. + */ + private async awaitApplied(t: number): Promise { + const expected = this.expectedApplied(t); + const deadline = Date.now() + APPLY_TIMEOUT_MS; + let previous = -1; + for (;;) { + const now = this.transport.applied(); + if (now >= expected && now === previous) return; + if (Date.now() > deadline) { + console.warn('[stage] apply timed out', { t, expected, applied: now }); + return; + } + previous = now; + await macrotask(); + } + } + + /** How many recorded events fall at or before t in absolute recorded time. */ + private expectedApplied(t: number): number { + let n = 0; + for (const r of this.timeline.runs) { + for (const e of r.run.events) if (r.startMs + e.tMs <= t) n += 1; + } + return n; + } +} + +/** A macrotask tick: also flushes the microtasks the bridge applies events on. */ +function macrotask(): Promise { + return new Promise((resolve) => setTimeout(resolve, 0)); +} diff --git a/examples/chat/angular/src/app/stage/stage-mode.component.spec.ts b/examples/chat/angular/src/app/stage/stage-mode.component.spec.ts new file mode 100644 index 000000000..e49ddc99a --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-mode.component.spec.ts @@ -0,0 +1,228 @@ +import { describe, expect, it, beforeEach, afterEach } from 'vitest'; +import { TestBed, type ComponentFixture } from '@angular/core/testing'; +import { provideRouter } from '@angular/router'; +import { StageMode } from './stage-mode.component'; +import { StageReplayTransport } from './stage-replay.transport'; +import { MINIMAL } from './stage-recording.fixtures'; + +describe('StageMode', () => { + let fx: ComponentFixture; + + beforeEach(async () => { + StageMode.disableAutoBootForTests(); + TestBed.configureTestingModule({ imports: [StageMode], providers: [provideRouter([])] }); + TestBed.overrideComponent(StageMode, { + set: { providers: StageMode.providersForTest(new StageReplayTransport(async () => MINIMAL)) }, + }); + fx = TestBed.createComponent(StageMode); + fx.detectChanges(); + await fx.whenStable(); + }); + + afterEach(() => StageMode.enableAutoBoot()); + + it('renders the chat, the devtools region, and an inert interrupt host', () => { + const el = fx.nativeElement as HTMLElement; + expect(el.querySelector('chat')).toBeTruthy(); + expect(el.querySelector('chat-debug')).toBeTruthy(); + expect(el.querySelector('[data-stage-interrupt]')?.getAttribute('data-inert')).toBe('true'); + expect(el.querySelector('[data-stage-pill]')?.textContent).toMatch(/recorded LangGraph run/i); + }); + + it('exposes the timeline for recorders and seeks to ?t= on boot', async () => { + await fx.componentInstance.boot(new URLSearchParams('t=25')); + expect(fx.componentInstance.timeline()?.totalMs).toBeGreaterThan(0); + expect(fx.componentInstance.controller()?.t()).toBe(25); + expect(window.__stageApplied?.t).toBe(25); + }); + + describe('transcript pin', () => { + // The pin is a pair of animation frames; the real ~16ms frame races the + // controller's macrotask timing, so these specs step a stubbed frame + // queue by hand and control exactly where each publish lands. + type Frame = { id: number; cb: FrameRequestCallback }; + let queue: Frame[] = []; + let cancelled: number[] = []; + let nextId = 0; + const realRaf = globalThis.requestAnimationFrame; + const realCaf = globalThis.cancelAnimationFrame; + const realWindowRaf = window.requestAnimationFrame; + const realWindowCaf = window.cancelAnimationFrame; + + beforeEach(() => { + queue = []; + cancelled = []; + nextId = 0; + const raf = (cb: FrameRequestCallback): number => { + const id = ++nextId; + queue.push({ id, cb }); + return id; + }; + const caf = (id: number): void => { + cancelled.push(id); + queue = queue.filter((f) => f.id !== id); + }; + globalThis.requestAnimationFrame = raf; + globalThis.cancelAnimationFrame = caf; + window.requestAnimationFrame = raf; + window.cancelAnimationFrame = caf; + }); + + afterEach(() => { + globalThis.requestAnimationFrame = realRaf; + globalThis.cancelAnimationFrame = realCaf; + window.requestAnimationFrame = realWindowRaf; + window.cancelAnimationFrame = realWindowCaf; + }); + + /** Runs exactly the callbacks queued at the time of the call, in order. */ + function step(): void { + const batch = queue; + queue = []; + for (const { cb } of batch) cb(performance.now()); + } + + /** Steps until nothing is queued: settles whatever boot scheduled. */ + function flush(): void { + for (let i = 0; i < 20 && queue.length > 0; i++) step(); + if (queue.length > 0) throw new Error('animation frames never settled'); + } + + /** The chat's scroll container, with jsdom's zero layout replaced by a tall transcript. */ + async function bootWithScroller(): Promise { + // The chat shows its welcome screen until a message lands, so the scroll + // container only exists once the first run has been applied. + await fx.componentInstance.boot(new URLSearchParams('t=0')); + fx.detectChanges(); + // Boot publishes too: drain its pair so each spec starts with no pin in flight. + flush(); + const scroller = (fx.nativeElement as HTMLElement).querySelector('chat .chat-scroll'); + if (!scroller) throw new Error('chat .chat-scroll did not render'); + // jsdom lays nothing out: stand in for a transcript taller than its box. + Object.defineProperty(scroller, 'scrollHeight', { configurable: true, writable: true, value: 2400 }); + Object.defineProperty(scroller, 'scrollTop', { configurable: true, writable: true, value: 0 }); + return scroller; + } + + /** Applies a seek and lets its publish schedule (or re-arm) the pin; no frame runs. */ + async function publishAt(t: number): Promise { + const c = fx.componentInstance.controller(); + if (!c) throw new Error('no controller'); + await c.seek(t); + fx.detectChanges(); + } + + it('pins the transcript to its newest content once a seek settles', async () => { + const scroller = await bootWithScroller(); + await publishAt(25); + expect(queue.length).toBeGreaterThan(0); + step(); // outer frame: views render + expect(scroller.scrollTop).toBe(0); + step(); // inner frame: layout settled, the write lands + expect(scroller.scrollTop).toBe(2400); + }); + + it('re-arms one more pin when a publish lands while a pair is in flight', async () => { + const scroller = await bootWithScroller(); + await publishAt(25); // schedules the pair + step(); // outer frame fires: the pair now owns everything before it + await publishAt(30); // lands between outer and inner: must re-arm + step(); // inner frame: writes the current height, then re-arms + expect(scroller.scrollTop).toBe(2400); + // Content that grows AFTER the first pair's inner frame: without the + // re-arm nothing is queued and the new 1200px stay below the fold. + Object.defineProperty(scroller, 'scrollHeight', { configurable: true, writable: true, value: 3600 }); + expect(queue.length).toBeGreaterThan(0); + step(); + step(); + expect(scroller.scrollTop).toBe(3600); + }); + + it('cancels an in-flight pin on destroy so no frame writes after teardown', async () => { + const scroller = await bootWithScroller(); + await publishAt(25); + const pending = queue.map((f) => f.id); + expect(pending.length).toBeGreaterThan(0); + fx.destroy(); + expect(cancelled.some((id) => pending.includes(id))).toBe(true); + expect(queue.some((f) => cancelled.includes(f.id))).toBe(false); + flush(); + expect(scroller.scrollTop).toBe(0); + }); + }); + + it('posts ready and state through the bridge', async () => { + const posted: unknown[] = []; + fx.componentInstance.bridge = { + onSeek: () => () => undefined, + postReady: (r) => posted.push(r), + postState: (s) => posted.push(s), + }; + await fx.componentInstance.boot(new URLSearchParams('t=0')); + fx.detectChanges(); + expect(posted[0]).toMatchObject({ totalMs: expect.any(Number) }); + expect(posted.some((p) => (p as { phase?: string }).phase === 'stream')).toBe(true); + }); + + it('keeps the devtools open when a click lands outside the panel', async () => { + const el = fx.nativeElement as HTMLElement; + const region = () => el.querySelector('[role="region"][aria-label="Chat devtools"]'); + expect(region()).toBeTruthy(); + document.dispatchEvent(new MouseEvent('click', { bubbles: true, composed: true })); + fx.detectChanges(); + await fx.whenStable(); + fx.detectChanges(); + expect(region()).toBeTruthy(); + }); +}); + +describe('StageMode responsive dock', () => { + const realMatchMedia = window.matchMedia; + + beforeEach(() => StageMode.disableAutoBootForTests()); + afterEach(() => { + window.matchMedia = realMatchMedia; + StageMode.enableAutoBoot(); + }); + + function stubWidth(width: number): void { + window.matchMedia = ((query: string) => { + const min = Number(/min-width:\s*(\d+)px/.exec(query)?.[1] ?? 0); + return { matches: width >= min, media: query } as MediaQueryList; + }) as typeof window.matchMedia; + } + + async function mount(): Promise> { + TestBed.resetTestingModule(); + TestBed.configureTestingModule({ imports: [StageMode], providers: [provideRouter([])] }); + TestBed.overrideComponent(StageMode, { + set: { providers: StageMode.providersForTest(new StageReplayTransport(async () => MINIMAL)) }, + }); + const fixture = TestBed.createComponent(StageMode); + fixture.detectChanges(); + await fixture.whenStable(); + fixture.detectChanges(); + return fixture; + } + + it('renders no devtools on a phone-width frame', async () => { + stubWidth(600); + const fixture = await mount(); + const el = fixture.nativeElement as HTMLElement; + expect(el.querySelector('chat-debug')).toBeNull(); + expect(el.querySelector('.stage')?.getAttribute('data-dock')).toBe('none'); + }); + + it('docks bottom on a tablet-width frame and right on a wide one', async () => { + stubWidth(900); + let fixture = await mount(); + expect((fixture.nativeElement as HTMLElement).querySelector('.stage')?.getAttribute('data-dock')).toBe( + 'bottom', + ); + stubWidth(1280); + fixture = await mount(); + expect((fixture.nativeElement as HTMLElement).querySelector('.stage')?.getAttribute('data-dock')).toBe( + 'right', + ); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-mode.component.ts b/examples/chat/angular/src/app/stage/stage-mode.component.ts new file mode 100644 index 000000000..5277e30de --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-mode.component.ts @@ -0,0 +1,550 @@ +import { + ChangeDetectionStrategy, + Component, + DestroyRef, + ElementRef, + EnvironmentInjector, + InjectionToken, + afterNextRender, + createEnvironmentInjector, + effect, + inject, + signal, + viewChild, + type Provider, + type WritableSignal, +} from '@angular/core'; +import { + ChatComponent, + ChatInterruptPanelComponent, + createAgentRef, + type AgentRef, + type InterruptAction, +} from '@threadplane/chat'; +import { ChatDebugComponent } from '@threadplane/chat/debug'; +import { + FetchStreamTransport, + injectAgent, + provideAgent, + type AgentConfig, + type LangGraphAgent, +} from '@threadplane/langgraph'; +import { environment } from '../../environments/environment'; +import { demoViews } from '../demo-views'; +import { browserStageBridge, type StageBridge, type StageState } from './stage-bridge'; +import { StageController } from './stage-controller'; +import { StageRecordingTransport } from './stage-recording.transport'; +import { StageReplayTransport } from './stage-replay.transport'; +import { StageScript, type StageScriptHost } from './stage-script'; +import type { StageTimeline } from './stage-timeline'; + +declare global { + interface Window { + /** Published in replay mode so a still recorder can map scroll to time. */ + __stageTimeline?: StageTimeline; + /** The applied state of the last settled seek; the still recorder waits on it. */ + __stageApplied?: StageState; + } +} + +/** The one stage agent: replay-backed normally, live + recording under `?record=1`. */ +export const STAGE_REF = createAgentRef>('stage'); + +/** Held per component instance, not at module scope: a re-entered route starts clean. */ +const STAGE_THREAD_ID = new InjectionToken>('STAGE_THREAD_ID'); +/** The recording transport in record mode; null in replay mode. */ +const STAGE_RECORDING = new InjectionToken('STAGE_RECORDING'); + +/** + * Same filter the demo shell and the hero apply: the canonical graph has + * side-effect LLM nodes (generate_title) whose tokens must not land on the + * just-completed answer, which would trip the streaming-markdown contract and + * stop the NEXT turn from rendering. The replay agent needs it too — the + * recording carries the same events the live run did. + */ +const TRANSCRIPT_NODE_NAMES = ['generate']; + +/** How long the record host waits to observe a submitted run actually starting. */ +const RUN_START_CAP_MS = 2000; +/** How long the record host waits for a reload's history refresh to land. */ +const RELOAD_CAP_MS = 10_000; +const POLL_MS = 50; + +/** + * Where the devtools panel sits, by frame width. `none` is the phone path: the + * website renders stills there, so a docked panel would only eat the chat. + */ +export type StageDock = 'right' | 'bottom' | 'none'; + +const WIDE_QUERY = '(min-width: 1024px)'; +const MEDIUM_QUERY = '(min-width: 768px)'; + +/** SSR/test-safe: without `matchMedia` we assume the wide frame the stage is authored for. */ +function readStageDock(): StageDock { + if (typeof window === 'undefined' || typeof window.matchMedia !== 'function') return 'right'; + if (window.matchMedia(WIDE_QUERY).matches) return 'right'; + if (window.matchMedia(MEDIUM_QUERY).matches) return 'bottom'; + return 'none'; +} + +function isRecordMode(): boolean { + if (environment.production || typeof location === 'undefined') return false; + return new URLSearchParams(location.search).get('record') === '1'; +} + +/** + * `provideAgent()` registers the shared AGENT token and aliases the ref to it, + * so two calls in ONE providers array collapse into a single agent. One child + * environment injector per agent keeps that from biting if the stage ever + * grows a second one. + */ +function scopedAgent(ref: AgentRef>, config: AgentConfig): LangGraphAgent { + const injector = createEnvironmentInjector(provideAgent(ref, config), inject(EnvironmentInjector)); + inject(DestroyRef).onDestroy(() => injector.destroy()); + return injector.get(ref.token) as LangGraphAgent; +} + +function stageProviders(replay?: StageReplayTransport): Provider[] { + return [ + // useFactory, not useValue: this array is built once at decorator time, so + // a `new StageReplayTransport()` here would be a module singleton carrying + // its run index across route re-entries. + { provide: StageReplayTransport, useFactory: () => replay ?? new StageReplayTransport() }, + { provide: STAGE_THREAD_ID, useFactory: () => signal(null) }, + { + provide: STAGE_RECORDING, + useFactory: () => { + if (!isRecordMode()) return null; + const threadId = inject(STAGE_THREAD_ID); + let rec: StageRecordingTransport | null = null; + const inner = new FetchStreamTransport(environment.langGraphApiUrl, (id: string) => { + threadId.set(id); + rec?.onThreadId(id); + }); + rec = new StageRecordingTransport(inner); + return rec; + }, + }, + { + provide: STAGE_REF.token, + useFactory: () => { + const threadId = inject(STAGE_THREAD_ID); + const recording = inject(STAGE_RECORDING); + if (recording) { + return scopedAgent(STAGE_REF, { + apiUrl: environment.langGraphApiUrl, + assistantId: environment.assistantId, + threadId, + onThreadId: (id: string) => threadId.set(id), + transport: recording, + transcriptNodeNames: TRANSCRIPT_NODE_NAMES, + }); + } + return scopedAgent(STAGE_REF, { + assistantId: 'stage-replay', + threadId, + transport: inject(StageReplayTransport), + transcriptNodeNames: TRANSCRIPT_NODE_NAMES, + }); + }, + }, + ]; +} + +@Component({ + selector: 'stage-mode', + standalone: true, + imports: [ChatComponent, ChatInterruptPanelComponent, ChatDebugComponent], + changeDetection: ChangeDetectionStrategy.OnPush, + providers: stageProviders(), + template: ` +
+
+ demo.threadplane.ai + + + @if (recording !== null) { + Recording a live LangGraph run + } @else { + Replaying a recorded LangGraph run + } + + Open the live demo ↗ +
+
+
+
+ @if (agent.interrupt?.()) { + + } +
+ +
+ + @if (dock() === 'right') { + + } @else if (dock() === 'bottom') { + + } +
+
+ `, + styles: [ + ` + :host { display: block; height: 100%; } + .stage { display: flex; flex-direction: column; height: 100%; } + .stage__bar { display: flex; align-items: center; gap: 12px; padding: 6px 12px; font: 12px/1.3 system-ui, sans-serif; border-bottom: 1px solid rgba(128,128,128,.25); } + .stage__url { opacity: .6; } + .stage__pill { display: inline-flex; align-items: center; gap: 6px; padding: 2px 9px; border-radius: 999px; border: 1px solid #b5731a; color: #b5731a; } + .stage__pill[data-live='true'] { border-color: #2f6f4f; color: #2f6f4f; } + .stage__dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; } + .stage__open { margin-left: auto; color: inherit; opacity: .7; } + .stage__surface { position: relative; flex: 1; min-height: 0; display: flex; } + /* chat-debug's right dock is position: fixed at width: var(--panel-size, 420px) + (libs/chat/debug/.../chat-debug.component.ts, .panel--right), so it is out of + flow and would sit ON TOP of the transcript. 420 + 16 gutter = 436px. */ + .stage__column { flex: 1; min-width: 0; display: flex; flex-direction: column; } + .stage[data-dock='right'] .stage__column { padding-right: var(--stage-devtools-width, 436px); } + /* The bottom dock is fixed to the viewport bottom at 40vh; below 768px no + panel renders at all, so the column keeps its full height. */ + .stage[data-dock='bottom'] .stage__column { padding-bottom: 40vh; } + .stage__column > chat { flex: 1; min-height: 0; } + .stage__interrupt:empty { display: none; } + .stage__interrupt { padding: 8px 12px 0; } + /* Replay is a recording, not a control surface: the panel is shown but + cannot be clicked, so a visitor cannot desync the transcript from t. */ + .stage__interrupt[data-inert='true'] { pointer-events: none; } + `, + ], +}) +export class StageMode { + /** TEST SEAM. Substitutes a preloaded replay transport so no fetch is made. */ + static providersForTest(replay?: StageReplayTransport): Provider[] { + return stageProviders(replay); + } + + /** TEST SEAM. Markup specs must not boot a replay on real timers. */ + static autoBoot = true; + static disableAutoBootForTests(): void { + StageMode.autoBoot = false; + } + static enableAutoBoot(): void { + StageMode.autoBoot = true; + } + + private readonly destroyRef = inject(DestroyRef); + private readonly replayTransport = inject(StageReplayTransport); + private readonly threadId = inject(STAGE_THREAD_ID); + /** Non-null only in record mode. */ + protected readonly recording = inject(STAGE_RECORDING); + protected readonly agent = injectAgent(STAGE_REF) as LangGraphAgent; + /** + * The devtools' agent contract types `state` as `Signal>` while the untyped LangGraph agent exposes `Signal`, so + * the SAME object needs a cast at this one read site. `DebugAgentWithHistory` + * is not exported from `@threadplane/chat/debug`, so the with-history half of + * the input's union is extracted from the input type itself — the panel's + * Timeline tab only appears for an agent that carries `history`. + */ + protected readonly debugAgent = this.agent as unknown as Extract< + NonNullable>, + { history: unknown } + >; + protected readonly catalog = demoViews(); + + /** + * Per-load key. The panel persists `open` under its storage key and closes + * itself on any document click, so a shared key would carry `open: false` + * into the next load and the stage would render with no devtools at all. + */ + protected readonly storageKey = `stage-debug-${Date.now()}`; + protected readonly dock = signal(readStageDock()); + private readonly debugPanel = viewChild(ChatDebugComponent); + + readonly timeline = signal(null); + readonly controller = signal(null); + + /** TEST SEAM. Replaced by the spec; browser bridge by default. */ + bridge: StageBridge = + typeof window === 'undefined' + ? { onSeek: () => () => undefined, postReady: () => undefined, postState: () => undefined } + : browserStageBridge(); + + private readonly host = inject>(ElementRef); + private lastPosted = ''; + private seekTarget: number | null = null; + private seekFrame: number | null = null; + private pinFrame: number | null = null; + /** A publish landed while a pin pair was in flight; one more pair follows it. */ + private pinPending = false; + + constructor() { + this.watchDock(); + this.destroyRef.onDestroy(() => { + if (typeof cancelAnimationFrame === 'function') { + if (this.seekFrame !== null) cancelAnimationFrame(this.seekFrame); + if (this.pinFrame !== null) cancelAnimationFrame(this.pinFrame); + } + this.seekFrame = null; + this.pinFrame = null; + this.pinPending = false; + }); + afterNextRender(() => { + if (StageMode.autoBoot) { + void this.boot(new URLSearchParams(typeof location === 'undefined' ? '' : location.search)); + } + }); + effect(() => { + const c = this.controller(); + if (!c) return; + this.publish({ applied: c.applied(), phase: c.phase(), t: c.t() }); + }); + } + + /** + * The devtools panel dismisses itself on ANY document click (and on Escape), + * which on the stage means the first click in the transcript would hide it + * for good. The stage is a display surface, so a close is reversed the + * instant it is reported. + */ + protected onDebugOpenChange(open: boolean): void { + if (open) return; + this.debugPanel()?.setOpen(true); + } + + /** Re-reads the dock whenever the frame crosses a breakpoint. */ + private watchDock(): void { + if (typeof window === 'undefined' || typeof window.matchMedia !== 'function') return; + const update = () => this.dock.set(readStageDock()); + for (const query of [WIDE_QUERY, MEDIUM_QUERY]) { + const mql = window.matchMedia(query); + // `addEventListener` is missing on older MediaQueryList shims (and on the + // stubs a spec installs), so an absent listener must not break the stage. + if (typeof mql?.addEventListener !== 'function') continue; + mql.addEventListener('change', update); + this.destroyRef.onDestroy(() => mql.removeEventListener('change', update)); + } + } + + /** Public so a spec (or the still recorder's harness) can boot explicitly. */ + async boot(params: URLSearchParams): Promise { + try { + if (this.recording) { + await this.record(); + return; + } + const tl = await this.replayTransport.ready(); + this.timeline.set(tl); + if (typeof window !== 'undefined') window.__stageTimeline = tl; + const controller = new StageController( + this.agent, + this.replayTransport, + tl, + await this.replayTransport.recordingData(), + ); + this.controller.set(controller); + this.bridge.postReady({ totalMs: tl.totalMs, beats: tl.beats }); + const off = this.bridge.onSeek((t) => this.requestSeek(t)); + this.destroyRef.onDestroy(off); + await controller.seek(Number(params.get('t')) || 0); + // Published here as well as from the effect: `await boot()` must imply + // the applied state is observable, without waiting on a render pass. + this.publish({ applied: controller.applied(), phase: controller.phase(), t: controller.t() }); + } catch (err) { + console.error('[stage] boot failed', err); + } + } + + /** + * One `controller.seek()` per animation frame, last target wins: a scroll + * burst posts far more targets than the agent's non-re-entrant submit path + * can absorb. + */ + requestSeek(t: number): void { + this.seekTarget = t; + if (typeof requestAnimationFrame !== 'function') { + void this.controller()?.seek(t); + return; + } + if (this.seekFrame !== null) return; + this.seekFrame = requestAnimationFrame(() => { + this.seekFrame = null; + const target = this.seekTarget; + this.seekTarget = null; + if (target !== null) void this.controller()?.seek(target); + }); + } + + protected async onInterruptAction(action: InterruptAction): Promise { + // Replay's interrupt panel is inert; only the recorder resolves for real. + if (!this.recording) return; + await this.agent.submit(null, { + command: { resume: action === 'accept' ? 'approved' : 'denied' }, + } as never); + } + + private publish(state: StageState): void { + const key = `${state.applied}|${state.phase}|${state.t}`; + if (key === this.lastPosted) return; + this.lastPosted = key; + this.bridge.postState(state); + if (typeof window !== 'undefined') window.__stageApplied = state; + this.pinTranscript(); + } + + /** + * Pins the transcript to its newest content once a seek has settled. The + * chat scrolls itself on each new message and on each token while pinned, + * but a seek applies a whole run in one burst, so its last + * `scrollTop = scrollHeight` write lands BEFORE the registered tool view + * (the backup table), the A2UI surface, and the interrupt panel — which sits + * above the chat and shrinks it — have rendered, and the newest content ends + * up below the fold: at the hold the transcript sat ~700px above its bottom. + * Live token cadence hides the same gap. + * + * Scheduling: one pair of frames is in flight at a time — the views render + * in the first, layout settles in the second, and the scroll write lands at + * the end of the second. A publish that arrives while a pair is in flight + * re-arms exactly one more pair after it, so content that renders after + * the pending pair's inner frame is still pinned rather than dropped. + * + * This deliberately overrides the chat's own unpin-on-user-scroll: the + * stage is a scrubbed display surface, not a reading surface, so a viewer + * who scrolls up is re-pinned on the next applied seek. + * + * `.chat-scroll` is the chat's own scroll container + * (libs/chat/.../chat.component.ts, `#scrollContainer`); it exposes no + * scroll API. + * TODO: replace with a public scrollToBottom() on ChatComponent + * (libs/chat/src/lib/compositions/chat/chat.component.ts, today protected + * onScrollBubbleClick) so this stops depending on the private .chat-scroll + * class. + */ + private pinTranscript(): void { + if (typeof requestAnimationFrame !== 'function') return; + if (this.pinFrame !== null) { + this.pinPending = true; + return; + } + this.pinFrame = requestAnimationFrame(() => { + // The pair now owns every publish that arrived before this frame fired. + this.pinPending = false; + this.pinFrame = requestAnimationFrame(() => { + this.pinFrame = null; + const el = this.host.nativeElement.querySelector('chat .chat-scroll'); + if (el) el.scrollTop = el.scrollHeight; + if (this.pinPending) { + this.pinPending = false; + this.pinTranscript(); + } + }); + }); + } + + // ── Record mode ─────────────────────────────────────────────────────────── + + /** Drives the four beats against the LIVE agent, producing the recording. */ + private async record(): Promise { + const rec = this.recording; + if (!rec) return; + const agent = this.agent; + // A run is only "done" for the recording once its closing history refresh + // has landed: the bridge refreshes history after a run closes, and a next + // run started before that lands cancels the refresh, leaving the previous + // run without a snapshot for the replay's getHistory() to serve. A run + // that closes on an interrupt is the exception — the bridge finalizes it + // as the interrupt arrives and skips the refresh, in replay as in record. + const settle = async (run: Promise): Promise => { + const before = rec.recording().histories.length; + await waitUntil(() => agent.isLoading(), RUN_START_CAP_MS); + await run; + await waitUntil( + () => + !agent.isThreadLoading() && + (rec.recording().histories.length > before || !!agent.interrupt?.()), + RELOAD_CAP_MS, + ); + }; + const host: StageScriptHost = { + beginRun: (beat, action) => rec.beginRun(beat, action), + submit: async (message, checkpointIndex) => { + const checkpointId = + checkpointIndex !== undefined ? agent.history()[checkpointIndex]?.id : undefined; + await settle(agent.submit({ message }, checkpointId ? ({ checkpointId } as never) : undefined)); + }, + resume: async (value) => { + await settle(agent.submit(null, { command: { resume: value } } as never)); + }, + reload: async () => { + // The reload's snapshot is stamped with the run count at the moment + // markReload() fires, so it MUST wait for the adoption's history + // refresh: closing the run first stamps an index the replay's + // getHistory() (which keys on runIndex) can never serve. + const id = this.threadId(); + agent.switchThread(null); + // Baseline AFTER the detach has been given a turn: a refresh still in + // flight from the previous beat would otherwise land and satisfy the + // growth check below without the adoption having refreshed at all. + await sleep(0); + const before = rec.recording().histories.length; + agent.switchThread(id); + await waitUntil( + () => !agent.isThreadLoading() && rec.recording().histories.length > before, + RELOAD_CAP_MS, + ); + rec.markReload(); + }, + isRunning: () => agent.isLoading(), + hasInterrupt: () => !!agent.interrupt?.(), + forkIndex: () => { + // history() is newest-first, so the first checkpoint holding exactly + // the opening question + its answer is the fork point. + const history = agent.history(); + const i = history.findIndex( + (s) => ((s.values as { messages?: unknown[] } | undefined)?.messages?.length ?? 0) === 2, + ); + return i >= 0 ? i : history.length - 1; + }, + sleep, + }; + await new StageScript(host).run(); + } +} + +function sleep(ms: number): Promise { + return new Promise((r) => setTimeout(r, ms)); +} + +/** Polls `pred` until true or the cap elapses; never throws, so a slow run still records. */ +async function waitUntil(pred: () => boolean, capMs: number): Promise { + const deadline = Date.now() + capMs; + while (!pred()) { + if (Date.now() >= deadline) { + console.warn('[stage] record host wait timed out'); + return; + } + await sleep(POLL_MS); + } +} diff --git a/examples/chat/angular/src/app/stage/stage-recording.fixtures.ts b/examples/chat/angular/src/app/stage/stage-recording.fixtures.ts new file mode 100644 index 000000000..1316b5840 --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-recording.fixtures.ts @@ -0,0 +1,20 @@ +// examples/chat/angular/src/app/stage/stage-recording.fixtures.ts +import type { StageRecording } from './stage-recording.types'; + +export const ev = (tMs: number) => ({ tMs, event: { type: 'values', messages: [] } as never }); + +export const MINIMAL: StageRecording = { + version: 2, + recordedAt: '2026-09-06T00:00:00.000Z', + threadId: 'thread-1', + runs: [ + { beat: 'stream', action: { kind: 'submit', message: 'Tell me about signals' }, events: [ev(0), ev(50)] }, + { beat: 'persist', action: { kind: 'reload' }, events: [] }, + { beat: 'persist', action: { kind: 'submit', message: 'Shorter, please.' }, events: [ev(0)] }, + { beat: 'persist', action: { kind: 'submit', message: 'As a haiku.', checkpointIndex: 1 }, events: [ev(0)] }, + { beat: 'approve', action: { kind: 'submit', message: 'Clean up backups.' }, events: [ev(0), ev(900)] }, + { beat: 'approve', action: { kind: 'resume', value: 'approved' }, events: [ev(0)] }, + { beat: 'render', action: { kind: 'submit', message: 'Show me a form.' }, events: [ev(0), ev(2000)] }, + ], + histories: [{ afterRun: 1, states: [] }], +}; diff --git a/examples/chat/angular/src/app/stage/stage-recording.transport.spec.ts b/examples/chat/angular/src/app/stage/stage-recording.transport.spec.ts new file mode 100644 index 000000000..1509568bf --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-recording.transport.spec.ts @@ -0,0 +1,44 @@ +import { describe, expect, it } from 'vitest'; +import type { AgentTransport, StreamEvent } from '@threadplane/langgraph'; +import { StageRecordingTransport } from './stage-recording.transport'; + +function inner(events: StreamEvent[]): AgentTransport { + return { + async *stream() { for (const e of events) yield e; }, + async getHistory() { return [{ values: {} } as never]; }, + }; +} +async function drain(iter: AsyncIterable): Promise { for await (const _ of iter) { /* drain */ } } + +describe('StageRecordingTransport', () => { + it('records each stream as a run tagged with the action the script announced', async () => { + let now = 0; + const t = new StageRecordingTransport(inner([{ type: 'values' } as never, { type: 'values' } as never]), () => (now += 10)); + t.beginRun('stream', { kind: 'submit', message: 'Q1' }); + await drain(t.stream('chat', 'thread-1', {}, new AbortController().signal)); + const rec = t.recording(); + expect(rec.runs).toHaveLength(1); + expect(rec.runs[0]).toMatchObject({ beat: 'stream', action: { kind: 'submit', message: 'Q1' } }); + expect(rec.runs[0].events.map((e) => e.tMs)).toEqual([10, 20]); + }); + it('records a reload as a run with no events, and history responses with the run count', async () => { + const t = new StageRecordingTransport(inner([])); + t.beginRun('stream', { kind: 'submit', message: 'Q1' }); + await drain(t.stream('chat', 'thread-1', {}, new AbortController().signal)); + t.beginRun('persist', { kind: 'reload' }); + t.markReload(); + await t.getHistory('thread-1', new AbortController().signal); + const rec = t.recording(); + expect(rec.runs[1]).toMatchObject({ beat: 'persist', action: { kind: 'reload' }, events: [] }); + expect(rec.histories).toEqual([{ afterRun: 2, states: [{ values: {} }] }]); + }); + it('refuses a stream without an announced action', async () => { + const t = new StageRecordingTransport(inner([])); + await expect(drain(t.stream('chat', 'thread-1', {}, new AbortController().signal))).rejects.toThrow(/beginRun/); + }); + it('captures the thread id the inner transport reports', () => { + const t = new StageRecordingTransport(inner([])); + t.onThreadId('thread-9'); + expect(t.recording().threadId).toBe('thread-9'); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-recording.transport.ts b/examples/chat/angular/src/app/stage/stage-recording.transport.ts new file mode 100644 index 000000000..9111b205f --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-recording.transport.ts @@ -0,0 +1,110 @@ +import type { AgentQueueEntry, AgentTransport, LangGraphSubmitOptions, StreamEvent } from '@threadplane/langgraph'; +import type { ThreadState } from '@langchain/langgraph-sdk'; +import type { RecordedEvent, StageAction, StageBeat, StageHistorySnapshot, StageRecording, StageRun } from './stage-recording.types'; + +declare global { + interface Window { + /** Set by StageRecordingTransport in record mode; read by the record script. */ + __stageRecording?: StageRecording; + } +} + +/** + * Wraps the real transport in record mode. The script announces each run's + * action with `beginRun()` before performing it; the next `stream()` call + * becomes that run. A reload has no stream, so the recording HOST — not the + * script — calls `markReload()` to close it as an empty run, and only once the + * adoption's history refresh has landed: a `markReload()` fired before that + * refresh stamps the snapshot with a run count the replay can never serve. + * Every `getHistory()` answer is kept with the number of runs recorded so far, + * which is what the replay keys on. + */ +export class StageRecordingTransport implements AgentTransport { + private readonly runs: StageRun[] = []; + private readonly histories: StageHistorySnapshot[] = []; + private pending: { beat: StageBeat; action: StageAction } | null = null; + private threadId = ''; + private readonly recordedAt = new Date().toISOString(); + + constructor(private readonly inner: AgentTransport, private readonly now: () => number = () => performance.now()) {} + + beginRun(beat: StageBeat, action: StageAction): void { + // A second announcement before the first is consumed would silently + // relabel the run about to stream with the WRONG action. + if (this.pending) throw new Error('beginRun() while an action is still pending'); + this.pending = { beat, action }; + } + + markReload(): void { + const p = this.pending; + this.pending = null; + if (!p || p.action.kind !== 'reload') throw new Error('markReload() needs a pending reload action'); + this.runs.push({ beat: p.beat, action: p.action, events: [] }); + this.publish(); + } + + onThreadId(id: string): void { + this.threadId = id; + this.publish(); + } + + recording(): StageRecording { + return { + version: 2, + recordedAt: this.recordedAt, + threadId: this.threadId, + runs: this.runs.map((run) => ({ ...run, events: [...run.events] })), + histories: [...this.histories], + }; + } + + async *stream(assistantId: string, threadId: string | null, payload: unknown, signal: AbortSignal, options?: LangGraphSubmitOptions): AsyncIterable { + const p = this.pending; + this.pending = null; + if (!p) throw new Error('stream() without beginRun(): the script must announce the action first'); + const events: RecordedEvent[] = []; + this.runs.push({ beat: p.beat, action: p.action, events }); + const start = this.now(); + for await (const event of this.inner.stream(assistantId, threadId, payload, signal, options)) { + events.push({ tMs: Math.round(this.now() - start), event }); + yield event; + } + // Once per run, not once per event: republishing a whole deep-copied + // recording on every token made a long run quadratic. + this.publish(); + } + + joinStream(threadId: string, runId: string, lastEventId: string | undefined, signal: AbortSignal): AsyncIterable { + return this.inner.joinStream + ? this.inner.joinStream(threadId, runId, lastEventId, signal) + : (async function* (): AsyncIterable { + /* no events */ + })(); + } + + createQueuedRun(assistantId: string, threadId: string, payload: unknown, signal: AbortSignal, options?: LangGraphSubmitOptions): Promise { + if (!this.inner.createQueuedRun) throw new Error('inner transport cannot queue runs'); + return this.inner.createQueuedRun(assistantId, threadId, payload, signal, options); + } + + cancelRun(threadId: string, runId: string, signal: AbortSignal): Promise { + return this.inner.cancelRun ? this.inner.cancelRun(threadId, runId, signal) : Promise.resolve(); + } + + async getHistory(threadId: string, signal: AbortSignal): Promise { + const states = this.inner.getHistory ? await this.inner.getHistory(threadId, signal) : []; + this.histories.push({ afterRun: this.runs.length, states }); + // Kept (unlike the per-event publish): a snapshot can be the LAST thing + // recorded, so without this the window copy would be missing it. + this.publish(); + return states; + } + + updateState(threadId: string, values: Record, signal: AbortSignal, options?: { asNode?: string }): Promise { + return this.inner.updateState ? this.inner.updateState(threadId, values, signal, options) : Promise.resolve(); + } + + private publish(): void { + if (typeof window !== 'undefined') window.__stageRecording = this.recording(); + } +} diff --git a/examples/chat/angular/src/app/stage/stage-recording.types.spec.ts b/examples/chat/angular/src/app/stage/stage-recording.types.spec.ts new file mode 100644 index 000000000..0fcd1b1ac --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-recording.types.spec.ts @@ -0,0 +1,53 @@ +// examples/chat/angular/src/app/stage/stage-recording.types.spec.ts +import { describe, expect, it } from 'vitest'; +import { validateStageRecording } from './stage-recording.types'; +import { MINIMAL, ev } from './stage-recording.fixtures'; + +describe('validateStageRecording', () => { + it('accepts a well-formed recording', () => { + expect(validateStageRecording(MINIMAL)).toBe(MINIMAL); + }); + it('requires version 2, a thread id, and all four beats in order', () => { + expect(() => validateStageRecording({ ...MINIMAL, version: 1 })).toThrow(/version/); + expect(() => validateStageRecording({ ...MINIMAL, threadId: '' })).toThrow(/threadId/); + const noRender = { ...MINIMAL, runs: MINIMAL.runs.filter((r) => r.beat !== 'render') }; + expect(() => validateStageRecording(noRender)).toThrow(/beats/); + const swapped = { ...MINIMAL, runs: [MINIMAL.runs[4], ...MINIMAL.runs.slice(0, 4), ...MINIMAL.runs.slice(5)] }; + expect(() => validateStageRecording(swapped)).toThrow(/order/); + }); + it('lets only a reload run have no events', () => { + const bad = { ...MINIMAL, runs: MINIMAL.runs.map((r, i) => (i === 0 ? { ...r, events: [] } : r)) }; + expect(() => validateStageRecording(bad)).toThrow(/run 0 has no events/); + }); + it('rejects a reload run that carries events', () => { + const bad = { ...MINIMAL, runs: MINIMAL.runs.map((r, i) => (i === 1 ? { ...r, events: [ev(900)] } : r)) }; + expect(() => validateStageRecording(bad)).toThrow(/run 1 is a reload and must have no events/); + }); + it('requires a resume run to follow the approve submit', () => { + const bad = { ...MINIMAL, runs: MINIMAL.runs.filter((r) => r.action.kind !== 'resume') }; + expect(() => validateStageRecording(bad)).toThrow(/resume/); + }); + it('rejects a negative checkpointIndex', () => { + const bad = { + ...MINIMAL, + runs: MINIMAL.runs.map((r, i) => (i === 3 ? { ...r, action: { ...r.action, checkpointIndex: -1 } } : r)), + }; + expect(() => validateStageRecording(bad)).toThrow(/checkpointIndex/); + }); + it('rejects a history with a non-numeric afterRun', () => { + const bad = { ...MINIMAL, histories: [{ afterRun: 'x', states: [] }] }; + expect(() => validateStageRecording(bad)).toThrow(/afterRun/); + }); + it('rejects a second resume run', () => { + const resumeRun = MINIMAL.runs.find((r) => r.action.kind === 'resume')!; + const bad = { ...MINIMAL, runs: [...MINIMAL.runs, resumeRun] }; + expect(() => validateStageRecording(bad)).toThrow(/one resume/); + }); + it('rejects events that are not in time order', () => { + const bad = { + ...MINIMAL, + runs: MINIMAL.runs.map((r, i) => (i === 0 ? { ...r, events: [ev(50), ev(0)] } : r)), + }; + expect(() => validateStageRecording(bad)).toThrow(/time order/); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-recording.types.ts b/examples/chat/angular/src/app/stage/stage-recording.types.ts new file mode 100644 index 000000000..1545dacb7 --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-recording.types.ts @@ -0,0 +1,92 @@ +import type { StreamEvent } from '@threadplane/langgraph'; +import type { ThreadState } from '@langchain/langgraph-sdk'; + +/** One transport event with its offset from the start of its run. */ +export interface RecordedEvent { readonly tMs: number; readonly event: StreamEvent; } + +export const STAGE_BEATS = ['stream', 'persist', 'approve', 'render'] as const; +export type StageBeat = (typeof STAGE_BEATS)[number]; + +/** + * What the script did to the agent to produce a run. Replayed verbatim by the + * controller, so the replay performs the same calls the recording did. + */ +export type StageAction = + | { readonly kind: 'submit'; readonly message: string; /** Fork: index into the agent's history() at that moment. */ readonly checkpointIndex?: number } + | { readonly kind: 'resume'; readonly value: string } + /** Simulated page reload: reset, then re-adopt the thread so history restores it. Has no stream. */ + | { readonly kind: 'reload' }; + +export interface StageRun { + readonly beat: StageBeat; + readonly action: StageAction; + readonly events: readonly RecordedEvent[]; +} + +/** A `getHistory` response, keyed by how many runs had been recorded when it was answered. */ +export interface StageHistorySnapshot { readonly afterRun: number; readonly states: readonly ThreadState[]; } + +export interface StageRecording { + readonly version: 2; + readonly recordedAt: string; + readonly threadId: string; + readonly runs: readonly StageRun[]; + readonly histories: readonly StageHistorySnapshot[]; +} + +const KINDS = new Set(['submit', 'resume', 'reload']); + +/** Throws a readable error when the fixture is not a usable recording. */ +export function validateStageRecording(input: unknown): StageRecording { + if (typeof input !== 'object' || input === null) throw new Error('stage recording must be an object'); + const rec = input as Partial; + if (rec.version !== 2) throw new Error('stage recording version must be 2'); + if (typeof rec.threadId !== 'string' || !rec.threadId) throw new Error('stage recording needs a threadId'); + if (!Array.isArray(rec.runs) || rec.runs.length === 0) throw new Error('stage recording needs runs'); + if (!Array.isArray(rec.histories)) throw new Error('stage recording needs histories'); + (rec.histories as readonly Partial[]).forEach((h: Partial, k: number) => { + if (typeof h.afterRun !== 'number' || !Number.isInteger(h.afterRun) || h.afterRun < 0) { + throw new Error(`history ${k} has no numeric afterRun`); + } + if (!Array.isArray(h.states)) throw new Error(`history ${k} has no states array`); + }); + const beatsSeen: StageBeat[] = []; + rec.runs.forEach((run: Partial, i: number) => { + if (!run.beat || !(STAGE_BEATS as readonly string[]).includes(run.beat)) throw new Error(`run ${i} has no beat`); + if (!run.action || !KINDS.has(run.action.kind)) throw new Error(`run ${i} has no action`); + if (run.action.kind === 'submit' && run.action.checkpointIndex !== undefined + && (!Number.isInteger(run.action.checkpointIndex) || run.action.checkpointIndex < 0)) { + throw new Error(`run ${i} has a bad checkpointIndex`); + } + if (!Array.isArray(run.events)) throw new Error(`run ${i} has no events`); + if (run.events.length === 0 && run.action.kind !== 'reload') throw new Error(`run ${i} has no events`); + // A reload streams nothing: the transport skips reload runs, so any events + // on one would silently be answered to the NEXT run's stream. + if (run.events.length > 0 && run.action.kind === 'reload') { + throw new Error(`run ${i} is a reload and must have no events`); + } + let prevTMs = -Infinity; + (run.events as readonly Partial[]).forEach((e: Partial, j: number) => { + if (typeof e?.tMs !== 'number' || !Number.isFinite(e.tMs)) throw new Error(`run ${i} event ${j} has no numeric tMs`); + if (typeof e.event !== 'object' || e.event === null) throw new Error(`run ${i} event ${j} has no event`); + if (e.tMs < prevTMs) throw new Error(`run ${i} events are not in time order`); + prevTMs = e.tMs; + }); + if (beatsSeen[beatsSeen.length - 1] !== run.beat) beatsSeen.push(run.beat); + }); + const resumeRuns = rec.runs.filter((r: StageRun) => r.action.kind === 'resume'); + if (resumeRuns.length !== 1) throw new Error('stage recording supports exactly one resume run'); + const missing = STAGE_BEATS.filter((b) => !beatsSeen.includes(b)); + if (missing.length > 0) { + throw new Error(`stage recording is missing beats: ${missing.join(', ')}`); + } + if (beatsSeen.length !== STAGE_BEATS.length || beatsSeen.some((b, i) => b !== STAGE_BEATS[i])) { + throw new Error(`stage recording beats are out of order: ${beatsSeen.join(' → ')}`); + } + const approveSubmit = rec.runs.findIndex((r: StageRun) => r.beat === 'approve' && r.action.kind === 'submit'); + const resume = rec.runs[approveSubmit + 1] as StageRun | undefined; + if (approveSubmit < 0 || resume?.action.kind !== 'resume') { + throw new Error('the approve beat needs a submit run followed by a resume run'); + } + return rec as StageRecording; +} diff --git a/examples/chat/angular/src/app/stage/stage-replay.fixture.spec.ts b/examples/chat/angular/src/app/stage/stage-replay.fixture.spec.ts new file mode 100644 index 000000000..84a6fcbab --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-replay.fixture.spec.ts @@ -0,0 +1,68 @@ +/// +import { describe, expect, it } from 'vitest'; +import { existsSync, readFileSync } from 'node:fs'; +import { resolve } from 'node:path'; +import { validateStageRecording } from './stage-recording.types'; +import { buildTimeline } from './stage-timeline'; + +const FIXTURE = resolve(__dirname, '../../../public/stage-replay.json'); + +const FIXTURE_EXISTS = existsSync(FIXTURE); + +describe.skipIf(!FIXTURE_EXISTS)('stage-replay.json', () => { + const rec = FIXTURE_EXISTS ? validateStageRecording(JSON.parse(readFileSync(FIXTURE, 'utf8'))) : (undefined as never); + const tl = FIXTURE_EXISTS ? buildTimeline(rec) : (undefined as never); + const json = (i: number) => JSON.stringify(rec.runs[i].events); + const run = (beat: string, kind: string) => rec.runs.findIndex((r) => r.beat === beat && r.action.kind === kind); + const finalAiText = (i: number): string => { + const vals = rec.runs[i].events.filter((e) => (e.event as { type?: string }).type === 'values'); + const msgs = ((vals.at(-1)?.event as { messages?: { type?: string; content?: unknown; tool_calls?: unknown[] }[] })?.messages ?? []); + const last = [...msgs].reverse().find((m) => m.type === 'ai' && !(m.tool_calls && m.tool_calls.length)); + const c = last?.content; + return typeof c === 'string' ? c : ((c as { type?: string; text?: string }[] | undefined) ?? []).filter((b) => b.type === 'text').map((b) => b.text ?? '').join(''); + }; + const lastToolJson = (i: number): Record => { + const vals = rec.runs[i].events.filter((e) => (e.event as { type?: string }).type === 'values'); + const msgs = ((vals.at(-1)?.event as { messages?: { type?: string; content?: unknown }[] })?.messages ?? []); + const tool = [...msgs].reverse().find((m) => m.type === 'tool'); + return JSON.parse(String(tool?.content ?? '{}')); + }; + + it('walks stream, persist, approve, render', () => { + expect(tl.beats.map((b) => b.beat)).toEqual(['stream', 'persist', 'approve', 'render']); + }); + it('the stream beat calls search_documents and attaches citations', () => { + expect(json(run('stream', 'submit'))).toMatch(/"name":\s*"search_documents"/); + expect(json(run('stream', 'submit'))).toMatch(/citations/); + }); + it('the persist beat has a reload with a history snapshot at its position and a fork', () => { + const reload = run('persist', 'reload'); + expect(rec.histories.some((h) => h.afterRun === reload && h.states.length > 0)).toBe(true); + expect(rec.runs.some((r) => r.action.kind === 'submit' && r.action.checkpointIndex !== undefined)).toBe(true); + }); + it('every completed run close recorded a history snapshot, so the devtools timeline is never empty at a beat', () => { + rec.runs.forEach((_, i) => { + if (rec.runs[i].action.kind === 'reload') return; + // The bridge skips its closing refresh for a run that ends in an + // interrupt (the next run is the resume), in replay as in record. + if (rec.runs[i + 1]?.action.kind === 'resume') return; + expect(rec.histories.some((h) => h.afterRun === i + 1), `run ${i}`).toBe(true); + }); + }); + it('the approve beat lists, pauses inside delete_backups, and resumes with an audit', () => { + const a = json(run('approve', 'submit')); + expect(a).toMatch(/"name":\s*"list_backups"/); + expect(a).toMatch(/"name":\s*"delete_backups"/); + expect(a).not.toMatch(/"name":\s*"request_approval"/); + expect(a).toMatch(/approval_request/); + const audit = lastToolJson(run('approve', 'resume')); + expect(Array.isArray(audit['deleted']) && (audit['deleted'] as unknown[]).length > 0).toBe(true); + expect(finalAiText(run('approve', 'resume')).length).toBeLessThan(1400); + }); + it('the render beat carries an A2UI payload', () => { + expect(json(run('render', 'submit'))).toMatch(/a2ui_JSON/); + }); + it('never contains an API key or bearer token', () => { + expect(JSON.stringify(rec)).not.toMatch(/sk-[A-Za-z0-9]{10,}|Bearer /); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-replay.transport.spec.ts b/examples/chat/angular/src/app/stage/stage-replay.transport.spec.ts new file mode 100644 index 000000000..79de4093b --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-replay.transport.spec.ts @@ -0,0 +1,146 @@ +// examples/chat/angular/src/app/stage/stage-replay.transport.spec.ts +import { describe, expect, it } from 'vitest'; +import type { StreamEvent } from '@threadplane/langgraph'; +import { MINIMAL } from './stage-recording.fixtures'; +import { buildTimeline } from './stage-timeline'; +import { StageReplayTransport } from './stage-replay.transport'; + +async function take(iter: AsyncIterable, n: number): Promise { + const out: StreamEvent[] = []; + for await (const e of iter) { out.push(e); if (out.length === n) break; } + return out; +} +function settle(): Promise { return new Promise((r) => setTimeout(r, 0)); } + +describe('StageReplayTransport', () => { + it('yields a run\'s events only up to the target time and waits for the rest', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(0); + const iter = t.stream('chat', 'thread-1', {}, new AbortController().signal)[Symbol.asyncIterator](); + expect((await iter.next()).value).toEqual(MINIMAL.runs[0].events[0].event); + let second: unknown = 'pending'; + void iter.next().then((r) => (second = r.value)); + await settle(); + expect(second).toBe('pending'); + t.seek(50); + await settle(); + expect(second).toEqual(MINIMAL.runs[0].events[1].event); + expect((await iter.next()).done).toBe(true); + }); + it('advances through runs in order and skips reload runs (they have no stream)', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + const tl = buildTimeline(MINIMAL); + t.seek(tl.totalMs); + const sig = new AbortController().signal; + expect(await take(t.stream('chat', 'thread-1', {}, sig), 9)).toHaveLength(2); // run 0 + expect(await take(t.stream('chat', 'thread-1', {}, sig), 9)).toHaveLength(1); // run 2 (run 1 is the reload) + expect(t.runIndex).toBe(3); + }); + it('counts applied events', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(0); + await take(t.stream('chat', 'thread-1', {}, new AbortController().signal), 1); + expect(t.applied()).toBe(1); + }); + it('serves the history snapshot recorded at exactly this position, and never a stale one', async () => { + const withHistory = { ...MINIMAL, histories: [{ afterRun: 1, states: [{ values: { messages: [] } } as never] }] }; + const t = new StageReplayTransport(async () => withHistory); + await t.ready(); + expect(await t.getHistory('thread-1', new AbortController().signal)).toEqual([]); + t.seek(buildTimeline(withHistory).totalMs); + const sig = new AbortController().signal; + await take(t.stream('chat', 'thread-1', {}, sig), 9); // run 0 → runIndex 1 + expect(await t.getHistory('thread-1', sig)).toHaveLength(1); + await take(t.stream('chat', 'thread-1', {}, sig), 9); // run 2 → runIndex 3 + // The bridge projects history over the transcript at every run close, so a + // snapshot from an earlier position must not be answered. + expect(await t.getHistory('thread-1', sig)).toEqual([]); + }); + it('never seeds the transcript from a pre-run snapshot', async () => { + const one = { values: { messages: [] } } as never; + const withHistory = { ...MINIMAL, histories: [{ afterRun: 0, states: [one] }] }; + const t = new StageReplayTransport(async () => withHistory); + await t.ready(); + expect(t.runIndex).toBe(0); + expect(await t.getHistory('thread-1', new AbortController().signal)).toEqual([]); + }); + it('answers the LAST snapshot recorded at this position', async () => { + const first = { values: { messages: [] }, checkpoint: { checkpoint_id: 'first' } } as never; + const last = { values: { messages: [] }, checkpoint: { checkpoint_id: 'last' } } as never; + const withHistory = { + ...MINIMAL, + histories: [{ afterRun: 1, states: [first] }, { afterRun: 1, states: [last] }], + }; + const t = new StageReplayTransport(async () => withHistory); + await t.ready(); + t.seek(buildTimeline(withHistory).totalMs); + const sig = new AbortController().signal; + await take(t.stream('chat', 'thread-1', {}, sig), 9); // run 0 → runIndex 1 + expect(await t.getHistory('thread-1', sig)).toEqual([last]); + }); + it('reset() rewinds to the first run and clears applied', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(50); + const sig = new AbortController().signal; + await take(t.stream('chat', 'thread-1', {}, sig), 9); + t.reset(); + expect(t.runIndex).toBe(0); + expect(t.applied()).toBe(0); + }); + it('reset() ends a stream that is waiting on the gate', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(0); + const iter = t.stream('chat', 'thread-1', {}, new AbortController().signal)[Symbol.asyncIterator](); + await iter.next(); + const pending = iter.next(); + t.reset(); + expect((await pending).done).toBe(true); + }); + it('stops when the signal aborts', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(0); + const ctl = new AbortController(); + const iter = t.stream('chat', 'thread-1', {}, ctl.signal)[Symbol.asyncIterator](); + await iter.next(); + const pending = iter.next(); + ctl.abort(); + expect((await pending).done).toBe(true); + }); + it('exposes the recording for the controller', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + expect(await t.recordingData()).toBe(MINIMAL); + }); + it('gates a later run on absolute time, not on its own offset', async () => { + const t = new StageReplayTransport(async () => MINIMAL); + await t.ready(); + t.seek(50); + const sig = new AbortController().signal; + await take(t.stream('chat', 'thread-1', {}, sig), 9); // run 0 drains (0..50) + const iter = t.stream('chat', 'thread-1', {}, sig)[Symbol.asyncIterator](); // run 2 starts at 650 + let first: unknown = 'pending'; + void iter.next().then((r) => (first = r.value)); + await settle(); + expect(first).toBe('pending'); + t.seek(650); + await settle(); + expect(first).toEqual(MINIMAL.runs[2].events[0].event); + }); + it('a stream started before reset() does not consume a run after it', async () => { + let release!: () => void; + const gate = new Promise((r) => (release = r)); + const t = new StageReplayTransport(async () => { await gate; return MINIMAL; }); + t.seek(50); + const iter = t.stream('chat', 'thread-1', {}, new AbortController().signal)[Symbol.asyncIterator](); + const pending = iter.next(); + t.reset(); + release(); + expect((await pending).done).toBe(true); + expect(t.runIndex).toBe(0); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-replay.transport.ts b/examples/chat/angular/src/app/stage/stage-replay.transport.ts new file mode 100644 index 000000000..02d41c178 --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-replay.transport.ts @@ -0,0 +1,126 @@ +// examples/chat/angular/src/app/stage/stage-replay.transport.ts +import { signal } from '@angular/core'; +import type { AgentQueueEntry, AgentTransport, LangGraphSubmitOptions, StreamEvent } from '@threadplane/langgraph'; +import type { ThreadState } from '@langchain/langgraph-sdk'; +import { validateStageRecording, type StageRecording } from './stage-recording.types'; +import { buildTimeline, type StageTimeline } from './stage-timeline'; + +export const STAGE_RECORDING_URL = '/stage-replay.json'; + +async function fetchRecording(): Promise { + const res = await fetch(STAGE_RECORDING_URL); + if (!res.ok) throw new Error(`stage recording fetch failed: ${res.status}`); + return validateStageRecording(await res.json()); +} + +/** + * AgentTransport that replays the committed stage recording under a gate: + * each `stream()` call answers the next non-reload run, yielding events whose + * ABSOLUTE recorded time (run start + tMs) is at or before the current target + * `t`, and waiting for `seek()` to move `t` before yielding the rest. There is + * no clock: the parent's scroll is the clock. Backward seeks are the + * controller's job (reset + fast-forward); this transport only ever moves + * forward within a run, and `reset()` ends any stream still waiting. + */ +export class StageReplayTransport implements AgentTransport { + private recording: Promise | null = null; + private timeline: StageTimeline | null = null; + private t = 0; + private readonly wakers = new Set<() => void>(); + /** Bumped by reset(); a stream whose generation is stale ends itself. */ + private generation = 0; + /** Index of the next run `stream()` will answer. Reload runs are skipped. */ + private nextRun = 0; + get runIndex(): number { return this.nextRun; } + private readonly appliedCount = signal(0); + readonly appliedSignal = this.appliedCount.asReadonly(); + + constructor(private readonly load: () => Promise = fetchRecording) {} + + async ready(): Promise { + const rec = await this.getRecording(); + this.timeline ??= buildTimeline(rec); + return this.timeline; + } + recordingData(): Promise { return this.getRecording(); } + /** Events yielded so far across all runs since the last reset. */ + applied(): number { return this.appliedCount(); } + + seek(t: number): void { + this.t = t; + this.wakeAll(); + } + /** + * `t` is deliberately left alone; the controller re-seeks after resetting. + */ + reset(): void { + this.generation += 1; + this.nextRun = 0; + this.appliedCount.set(0); + this.wakeAll(); + } + + async *stream(_a: string, _thread: string | null, _payload: unknown, abortSignal: AbortSignal, _o?: LangGraphSubmitOptions): AsyncIterable { + const gen = this.generation; + const tl = await this.ready(); + if (abortSignal.aborted || gen !== this.generation) return; + while (tl.runs[this.nextRun]?.run.action.kind === 'reload') this.nextRun += 1; + const entry = tl.runs[this.nextRun]; + if (!entry) return; + this.nextRun += 1; + for (const { tMs, event } of entry.run.events) { + while (entry.startMs + tMs > this.t) { + if (abortSignal.aborted || gen !== this.generation) return; + await this.wait(abortSignal); + } + if (abortSignal.aborted || gen !== this.generation) return; + this.appliedCount.update((n) => n + 1); + yield event; + } + } + + private wait(abortSignal: AbortSignal): Promise { + return new Promise((resolve) => { + const wake = () => { this.wakers.delete(wake); abortSignal.removeEventListener('abort', wake); resolve(); }; + this.wakers.add(wake); + abortSignal.addEventListener('abort', wake, { once: true }); + }); + } + private wakeAll(): void { for (const w of [...this.wakers]) w(); } + + /** + * The snapshot recorded at exactly this replay position, or none. + * + * A stale snapshot is deliberately NOT served: the bridge treats history as + * authoritative at the close of every run and projects it over the + * transcript (stream-manager.bridge.ts, finalizeClosedAttempt → + * refreshHistory(force: true)), so answering an at-or-before snapshot would + * snap the replayed transcript back to whatever the recorder last captured. + * Serving nothing leaves the streamed transcript alone. The recorder must + * therefore capture a snapshot after every run it wants restored (the + * reload run above all). + * + * Before the first run has streamed nothing has been replayed, so a + * pre-run snapshot is never answered: it would seed the transcript with a + * transcript the stage has not shown yet. When several snapshots share a + * position the LAST one wins — it is the most recently recorded. + */ + async getHistory(_thread: string, _signal: AbortSignal): Promise { + if (this.runIndex === 0) return []; + const rec = await this.getRecording(); + for (let i = rec.histories.length - 1; i >= 0; i--) { + if (rec.histories[i].afterRun === this.runIndex) return rec.histories[i].states as ThreadState[]; + } + return []; + } + async createQueuedRun(_a: string, threadId: string, payload: unknown, _s: AbortSignal, options?: LangGraphSubmitOptions): Promise { + return { id: 'stage-replay-queued-run', threadId, values: payload, options: { ...options, multitaskStrategy: 'enqueue' }, createdAt: new Date() }; + } + async cancelRun(): Promise { return; } + async *joinStream(): AsyncIterable { yield* []; } + + private getRecording(): Promise { + this.recording ??= this.load().catch((err) => { this.recording = null; throw err; }); + return this.recording; + } +} diff --git a/examples/chat/angular/src/app/stage/stage-script.spec.ts b/examples/chat/angular/src/app/stage/stage-script.spec.ts new file mode 100644 index 000000000..e8532a4bb --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-script.spec.ts @@ -0,0 +1,37 @@ +import { describe, expect, it } from 'vitest'; +import { StageScript, STAGE_PROMPTS, type StageScriptHost } from './stage-script'; + +describe('StageScript', () => { + it('walks the four beats in order, announcing each run\'s action before performing it', async () => { + const log: string[] = []; + let interrupt = false; + let loading = false; + const host: StageScriptHost = { + beginRun: (beat, action) => log.push(`begin:${beat}:${action.kind}`), + submit: async (message, checkpointIndex) => { log.push(`submit:${message}${checkpointIndex !== undefined ? `@${checkpointIndex}` : ''}`); loading = true; setTimeout(() => { loading = false; interrupt = message === STAGE_PROMPTS.approve; }, 1); }, + resume: async (value) => { log.push(`resume:${value}`); interrupt = false; }, + reload: async () => { log.push('reload'); }, + isRunning: () => loading, + hasInterrupt: () => interrupt, + forkIndex: () => 0, + sleep: (ms) => new Promise((r) => setTimeout(r, Math.min(ms, 1))), + }; + await new StageScript(host).run(); + expect(log).toEqual([ + 'begin:stream:submit', `submit:${STAGE_PROMPTS.stream}`, + 'begin:persist:reload', 'reload', + 'begin:persist:submit', `submit:${STAGE_PROMPTS.shorter}`, + 'begin:persist:submit', `submit:${STAGE_PROMPTS.fork}@0`, + 'begin:approve:submit', `submit:${STAGE_PROMPTS.approve}`, + 'begin:approve:resume', 'resume:approved', + 'begin:render:submit', `submit:${STAGE_PROMPTS.render}`, + ]); + }); + it('times out rather than hanging when the agent never settles', async () => { + const host: StageScriptHost = { + beginRun: () => undefined, submit: async () => undefined, resume: async () => undefined, reload: async () => undefined, + isRunning: () => true, hasInterrupt: () => false, forkIndex: () => 0, sleep: () => Promise.resolve(), + }; + await expect(new StageScript(host).run()).rejects.toThrow(/timed out/); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-script.ts b/examples/chat/angular/src/app/stage/stage-script.ts new file mode 100644 index 000000000..2b0370bff --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-script.ts @@ -0,0 +1,79 @@ +import type { StageAction, StageBeat } from './stage-recording.types'; + +/** + * The four beats, verbatim. The approve and render prompts are the hero's, so + * the stage shows the same run the hero teases; the stream prompt is the demo's + * search-and-cite chip; the persist prompts are short on purpose. + */ +export const STAGE_PROMPTS = { + stream: + 'Use the search tool to find authoritative information about Angular signals, then explain what they are and when to use them. Cite each source inline as [^doc-id] using the document `id` field returned by the tool.', + shorter: 'Shorter, please.', + fork: 'Make it a haiku instead.', + approve: 'Clean up our old database backups, anything older than 90 days.', + render: 'Show me a contact form with fields for name, email address, subject, and a multi-line message, plus a Send button.', +} as const; + +export interface StageScriptHost { + beginRun(beat: StageBeat, action: StageAction): void; + /** + * Resolves once the run has CLOSED and its closing history refresh has + * landed. Resolving any earlier lets the script start the next run while + * the refresh is in flight, which cancels it and leaves this run without a + * history snapshot for the replay to serve. + */ + submit(message: string, checkpointIndex?: number): Promise; + /** Same contract as `submit`. */ + resume(value: string): Promise; + reload(): Promise; + isRunning(): boolean; + hasInterrupt(): boolean; + /** Index into history() of the checkpoint to fork from: the first answer's. */ + forkIndex(): number; + sleep(ms: number): Promise; +} + +export const SCRIPT_WAIT_TIMEOUT_MS = 120_000; +const POLL_MS = 50; + +/** Record-mode driver: performs the beats against the live agent, announcing each run first. */ +export class StageScript { + constructor(private readonly host: StageScriptHost) {} + + async run(): Promise { + await this.turn('stream', STAGE_PROMPTS.stream); + + this.host.beginRun('persist', { kind: 'reload' }); + await this.host.reload(); + + await this.turn('persist', STAGE_PROMPTS.shorter); + + const fork = this.host.forkIndex(); + await this.turn('persist', STAGE_PROMPTS.fork, fork); + + this.host.beginRun('approve', { kind: 'submit', message: STAGE_PROMPTS.approve }); + await this.host.submit(STAGE_PROMPTS.approve); + await this.waitFor(() => this.host.hasInterrupt()); + + this.host.beginRun('approve', { kind: 'resume', value: 'approved' }); + await this.host.resume('approved'); + await this.waitFor(() => !this.host.isRunning() && !this.host.hasInterrupt()); + + await this.turn('render', STAGE_PROMPTS.render); + } + + private async turn(beat: StageBeat, message: string, checkpointIndex?: number): Promise { + this.host.beginRun(beat, checkpointIndex !== undefined ? { kind: 'submit', message, checkpointIndex } : { kind: 'submit', message }); + await this.host.submit(message, checkpointIndex); + await this.waitFor(() => !this.host.isRunning()); + } + + private async waitFor(pred: () => boolean): Promise { + let elapsed = 0; + while (!pred()) { + if (elapsed >= SCRIPT_WAIT_TIMEOUT_MS) throw new Error('stage script timed out waiting for the agent'); + await this.host.sleep(POLL_MS); + elapsed += POLL_MS; + } + } +} diff --git a/examples/chat/angular/src/app/stage/stage-timeline.spec.ts b/examples/chat/angular/src/app/stage/stage-timeline.spec.ts new file mode 100644 index 000000000..50a6e257e --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-timeline.spec.ts @@ -0,0 +1,56 @@ +// examples/chat/angular/src/app/stage/stage-timeline.spec.ts +import { describe, expect, it } from 'vitest'; +import { MINIMAL } from './stage-recording.fixtures'; +import { HOLD_MS, RELOAD_MS, buildTimeline, phaseAt, phaseReachedAt, runsStartedBy } from './stage-timeline'; + +describe('buildTimeline', () => { + const tl = buildTimeline(MINIMAL); + it('lays runs end to end, gives a reload a fixed beat, and holds before the resume', () => { + expect(tl.runs[0]).toMatchObject({ index: 0, startMs: 0, endMs: 50 }); + expect(tl.runs[1]).toMatchObject({ index: 1, startMs: 50, endMs: 50 + RELOAD_MS }); + const approve = tl.runs[4]; + const resume = tl.runs[5]; + expect(resume.startMs).toBe(approve.endMs + HOLD_MS); + expect(tl.hold).toEqual({ startMs: approve.endMs, endMs: resume.startMs }); + expect(tl.totalMs).toBe(tl.runs[6].endMs); + }); + it('derives beat boundaries from the runs', () => { + expect(tl.beats.map((b) => b.beat)).toEqual(['stream', 'persist', 'approve', 'render']); + expect(tl.beats[0]).toMatchObject({ startMs: 0, endMs: tl.runs[0].endMs }); + expect(tl.beats[2].endMs).toBe(tl.runs[5].endMs); + expect(tl.beats[3].endMs).toBe(tl.totalMs); + }); +}); + +describe('phaseAt', () => { + const tl = buildTimeline(MINIMAL); + it('names stream, persist, pause, resume, render', () => { + expect(phaseAt(tl, 0)).toBe('stream'); + expect(phaseAt(tl, tl.runs[1].startMs)).toBe('persist'); + expect(phaseAt(tl, tl.hold.startMs + 1)).toBe('pause'); + expect(phaseAt(tl, tl.runs[5].startMs)).toBe('resume'); + expect(phaseAt(tl, tl.totalMs)).toBe('render'); + }); + it('separates the approve submit run (streaming) from the authored hold', () => { + expect(phaseAt(tl, tl.runs[4].startMs + 1)).toBe('stream'); + expect(phaseAt(tl, tl.hold.startMs + 1)).toBe('pause'); + }); +}); + +describe('phaseReachedAt', () => { + const tl = buildTimeline(MINIMAL); + it('names the moment reached, so a run\'s end still belongs to that run', () => { + expect(phaseReachedAt(tl, tl.runs[0].endMs)).toBe('stream'); + expect(phaseAt(tl, tl.runs[0].endMs)).toBe('persist'); + expect(phaseReachedAt(tl, 0)).toBe('stream'); + }); +}); + +describe('runsStartedBy', () => { + const tl = buildTimeline(MINIMAL); + it('lists every run whose start is at or before t', () => { + expect(runsStartedBy(tl, 0).map((r) => r.index)).toEqual([0]); + expect(runsStartedBy(tl, tl.hold.startMs + 1).map((r) => r.index)).toEqual([0, 1, 2, 3, 4]); + expect(runsStartedBy(tl, tl.totalMs).length).toBe(7); + }); +}); diff --git a/examples/chat/angular/src/app/stage/stage-timeline.ts b/examples/chat/angular/src/app/stage/stage-timeline.ts new file mode 100644 index 000000000..72e58e3ea --- /dev/null +++ b/examples/chat/angular/src/app/stage/stage-timeline.ts @@ -0,0 +1,113 @@ +// examples/chat/angular/src/app/stage/stage-timeline.ts +import type { StageBeat, StageRecording, StageRun } from './stage-recording.types'; + +/** + * The recorded-time room given to a reload run, which streams nothing (the + * validator rejects a reload that carries events): enough for the transcript + * to visibly blank and restore. + */ +export const RELOAD_MS = 600; +/** + * The authored hold at the interrupt, in recorded milliseconds. Between the + * approve run's last event and the resume run's first, nothing advances; the + * parent maps a large share of scroll to this window (spec §6). + */ +export const HOLD_MS = 3000; + +export type StagePhase = 'stream' | 'persist' | 'pause' | 'resume' | 'render'; + +export interface TimelineRun { + readonly index: number; + readonly run: StageRun; + readonly startMs: number; + readonly endMs: number; +} + +export interface TimelineBeat { + readonly beat: StageBeat; + readonly startMs: number; + readonly endMs: number; +} + +export interface StageTimeline { + readonly runs: readonly TimelineRun[]; + readonly beats: readonly TimelineBeat[]; + /** + * The single authored hold at the interrupt (spec §6). A recording carries + * exactly one resume run, so there is exactly one hold; a second resume + * run is unsupported and would silently overwrite this field. + */ + readonly hold: { readonly startMs: number; readonly endMs: number }; + readonly totalMs: number; +} + +function durationOf(run: StageRun): number { + if (run.action.kind === 'reload') return RELOAD_MS; + const last = run.events[run.events.length - 1]?.tMs ?? 0; + return Math.max(last, 1); +} + +/** Lays runs end to end in recorded milliseconds, inserting the authored HOLD before the resume run. */ +export function buildTimeline(rec: StageRecording): StageTimeline { + const runs: TimelineRun[] = []; + let cursor = 0; + let hold = { startMs: 0, endMs: 0 }; + rec.runs.forEach((run, index) => { + if (run.action.kind === 'resume') { + hold = { startMs: cursor, endMs: cursor + HOLD_MS }; + cursor += HOLD_MS; + } + const startMs = cursor; + const endMs = startMs + durationOf(run); + runs.push({ index, run, startMs, endMs }); + cursor = endMs; + }); + const beats: TimelineBeat[] = []; + for (const r of runs) { + const last = beats[beats.length - 1]; + if (last && last.beat === r.run.beat) beats[beats.length - 1] = { ...last, endMs: r.endMs }; + else beats.push({ beat: r.run.beat, startMs: r.startMs, endMs: r.endMs }); + } + return { runs, beats, hold, totalMs: cursor }; +} + +/** Names the phase active at t: stream/persist/render follow the run's beat; pause and resume mark the interrupt. */ +export function phaseAt(tl: StageTimeline, t: number): StagePhase { + if (t >= tl.hold.startMs && t < tl.hold.endMs) return 'pause'; + let current = tl.runs[0]; + for (let i = tl.runs.length - 1; i >= 0; i--) { + if (tl.runs[i].startMs <= t) { + current = tl.runs[i]; + break; + } + } + if (current.run.action.kind === 'resume') return 'resume'; + // The beats and the phases are almost the same vocabulary, except that the + // `approve` beat spans three phases: the submit run that streams up to the + // interrupt is `stream`, the authored hold is `pause` (returned above), and + // the resume run is `resume` (also above). Reporting the submit run as + // `pause` would leave a parent unable to tell streaming from held. + return current.run.beat === 'approve' ? 'stream' : current.run.beat; +} + +/** + * How far before a boundary the rendered moment sits. Runs are laid end to + * end, so a run's end is the next run's start; at that instant the outgoing + * run still owns the frame. + */ +const PHASE_EPSILON = 1e-3; + +/** + * The phase of the moment the stage has REACHED at t, not of the one about to + * begin — `t` minus an epsilon. This is what a consumer should render; it is + * NOT a report of which action has fired (see the boundary note in + * stage-controller.ts). + */ +export function phaseReachedAt(tl: StageTimeline, t: number): StagePhase { + return phaseAt(tl, Math.max(0, t - PHASE_EPSILON)); +} + +/** Every run whose start is at or before t, in order. */ +export function runsStartedBy(tl: StageTimeline, t: number): readonly TimelineRun[] { + return tl.runs.filter((r) => r.startMs <= t); +}