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1 change: 1 addition & 0 deletions .claude/agent-notes.md
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Expand Up @@ -41,3 +41,4 @@ Standing always/never directives and corrections from the human. Agents must rea
- Long-form guides, the talk write-up, and retrospectives live in `Sources/MistKit/Documentation.docc/` (published on Swift Package Index) — do NOT recreate a top-level `docs/` directory for prose; every DocC code sample must be copied from current source, not from older docs.
- `.claude/memory/_raw/` (uncurated archaeology reports + `recovered/`) was removed 2026-09-09 at Leo's request — do NOT recreate an uncurated holding pen under `.claude/memory/`; findings go straight into named memory files or GitHub issues.
- #481 FieldValue lists: prefer `Arity<T>` (`.value`/`.list`) on each kind over a parallel `FieldValue.List` enum; deprecated polyfills for **scalar** constructions only (`.string(_: String)` → `.value`); do **not** polyfill old `.list([FieldValue])` — break list call sites cleanly. Research: `.claude/docs/research/481-homogeneous-list-without-duplicate-enums.md`.
- **On macOS only**, when swiftly has no toolchain matching the pinned `.swift-version`, run Swift via `xcrun` (`xcrun swift build`/`test`) — the swiftly-managed `swift` crashed swift-frontend on the root package. `xcrun` is an Xcode tool and does NOT exist on Linux: Ubuntu CI and Linux agents invoke `swift` directly.
7 changes: 6 additions & 1 deletion .claude/docs/README.md
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Expand Up @@ -63,7 +63,12 @@ implementation phases.
`research/` holds dated investigations into specific failures, kept for the
reasoning rather than as current reference. Each is a point-in-time record.

- [481-homogeneous-list-without-duplicate-enums.md](research/481-homogeneous-list-without-duplicate-enums.md) — #481: prefer `Arity<T>` on each kind over parallel list enum / protocol storage; deprecated scalar polyfills only
| Doc | Size | Consult when |
|-----|------|--------------|
| [research/asset-filechecksum.md](research/asset-filechecksum.md) | 10 KB | Anyone proposes verifying asset bytes against `fileChecksum` — it is a server-minted opaque token, not a client-derivable digest (#466, #473) |
| [research/adp-web-auth-signin.md](research/adp-web-auth-signin.md) | 30 KB | Web-auth sign-in (CloudKit JS popup, `ckWebAuthToken`) fails for an Advanced Data Protection account — by design of the ADP key model, no workaround except turning ADP off (#392 B1a/B2) |
| [research/windows-6.2-ci-failure-462.md](research/windows-6.2-ci-failure-462.md) | 2 KB | The Windows Swift 6.2 CI job aborts silently while emitting `MistKitTests` (#462) |
| [research/481-homogeneous-list-without-duplicate-enums.md](research/481-homogeneous-list-without-duplicate-enums.md) | — | Designing `FieldValue` list storage — why `Arity<T>` per kind beat a parallel list enum / protocol storage, and why only scalar polyfills are deprecated (#481) |

## Related

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510 changes: 510 additions & 0 deletions .claude/docs/research/adp-web-auth-signin.md

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4 changes: 4 additions & 0 deletions .claude/memory/MEMORY.md
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Expand Up @@ -60,3 +60,7 @@ Project-scoped agent memory for MistKit. This directory **replaces** any native
- [List responses use `*_LIST`, empty lists round-trip as `[]`](project_cloudkit_list_response_type_is_star_list.md) — live S2S: `STRING_LIST`+`[]` present on read; openapi `FieldValueResponse` flat `LIST` is wrong (#481)
- [FieldValue lists use Arity](project_fieldvalue_arity_homogeneous_lists.md) — `#481`: `Arity<T>` on each kind; no `case list`; scalar deprecations only; response `*_LIST`
- [Docs live in the DocC catalog](project_docs_live_in_docc.md) — top-level `docs/` removed 2026-09-08; prose guides, the talk article, and retrospectives are DocC articles; verify with the symbol-graph + `docc convert` recipe
- [Encrypted fields ADP probe](encrypted-fields-adp-probe.md) — ADP test account exists (2026-09-14); characterize #392 with `mistdemo probe-encrypted`, not test-private
- [Use xcrun for Swift](reference_use_xcrun_for_swift.md) — the swiftly-managed `swift` crashes swift-frontend here; `xcrun swift build/test` works and also fixes MistDemo's 6.4 pin
- [Lint needs mise trust](reference_lint_needs_mise_trust.md) — an untrusted `mise.toml` silently downgrades SwiftLint and skips Periphery, inventing phantom findings
- [Android emulator flake](reference_android_emulator_flake.md) — an Android job that fails with `adb ... TCP port 5554` after emitting the test modules is a flake; re-run, don't edit source
96 changes: 96 additions & 0 deletions .claude/memory/encrypted-fields-adp-probe.md
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---
name: encrypted-fields-adp-probe
description: Issue #392 live characterization — an ADP-enabled iCloud test account exists (2026-09-14); run `mistdemo probe-encrypted` per account, not test-private
metadata:
type: project
---

As of 2026-09-14 Leo has an Advanced Data Protection (ADP) iCloud test account for
issue #392 (encrypted fields over CloudKit Web Services). The live comparison
(standard protection vs ADP: scenarios B0/C4, B1a/B1b/B1c, B3) is run with
`swift run mistdemo probe-encrypted` (Examples/MistDemo), one run per account's
`CLOUDKIT_WEB_AUTH_TOKEN`, and the summary block pasted into issue #392.

**Why:** `test-private` aborts on the first failing phase and `EncryptedFieldsPhase`
deletes its zone, so it cannot persist a record under standard protection and read it
back under ADP, nor reach the asset-download step once the encrypted step fails.
`lookupRecords` also has no `zoneID` parameter, so the probe defaults to `_defaultZone`.

**Results so far (2026-09-14):**
- **B0/C4 standard account — PASS.** Encrypted STRING write needs an explicit `type`
(untagged → `BAD_REQUEST … ENCRYPTED_BYTES … defined to be: ENCRYPTED_STRING`); with
`type: STRING` CloudKit echoes `isEncrypted: true` + plaintext on modify, lookup and
query. Asset upload/download in the same record works. The asset came back with
`wrappingKey`/`referenceChecksum` set (contradicts the older "never appear live" note in
CLAUDE.md; not yet known whether that depends on the encrypted sibling field).
- **B1a ADP account — sign-in never yields a token.** CloudKit JS popup: with web access
off → "iCloud Data Web Access is Off"; with web access on + trusted device armed via
icloud.com → "Authentication Error — This action could not be completed." Standard
account signs in within a minute through the same flow. Chrome HAR (2026-09-14): Apple ID
sign-in + device approval succeed and 302 to `cdn.apple-cloudkit.com/ck-auth/` with an
`oauth_token`; the failing step is `setup.apple-cloudkit.com/setup/ws/1/oauth/validateToken`
→ 200 `{"status":13}`, a status `ckauth.js` has no handler for (0 success, 7 TOS, 11 poll `requestPCS`, 12 web-access-off); telemetry `CKAUTHunknownError` / `CKJSUnexpectedAuthError`.
Chrome == Safari. iCloud.com control (same ADP account): `setup.icloud.com/setup/ws/1/`
`requestWebAccessState` → `enableDeviceConsentForPCS` → `requestPCS {appName:"notes3"}`, then
Notes' `/database/1/com.apple.notes/production/private/*` calls all 200 incl. encrypted fields —
first-party apps get per-app key release; third-party containers are refused before that loop.
Research write-up: `.claude/docs/research/adp-web-auth-signin.md` §1.1.
- `records/changes` is invalid in `_defaultZone` ("cannot get changes in default zone");
`lookupRecords` has no `zoneID`, so the probe defaults to the default zone and skips
the changes step there (use `--zone-name` to swap which read is skipped).

**How to apply:** Prerequisite is `"secret" ENCRYPTED STRING` on `Note` deployed to the
`iCloud.com.brightdigit.MistDemo` development schema. Keep `CloudKitError` mapping as-is
(no ADP-specific case) until an ADP account actually reaches the API.

## Session handoff — 2026-09-14 (stopped for a machine restart)

**Branch `392-encrypted-fields`, all work UNCOMMITTED in the worktree** (`git status` lists it).
Tracking issue for ADP: #486. Results comment posted on #392 (links #486). Research doc:
`.claude/docs/research/adp-web-auth-signin.md` (§1.1 HAR, §1.2 `{"status":13}` + `ckauth.js` table,
§1.3 icloud.com control). Both confirmed: nothing for MistKit to handle under ADP.

### Done and verified
- `probe-encrypted` MistDemo command (5 new files under `Examples/MistDemo/Sources/MistDemoKit/`).
- MistKit fixes with tests: explicit `type` on encrypted fields (`Components.Schemas.RecordOperation`,
`FilterBuilder.cloudKitListType` now internal); `RecordInfo` tolerant decoder; logging middleware
64 KiB replay via `Sources/MistKit/OpenAPI/ReplayingBodyIterator.swift` (actor).
- Live B0/C4 pass; C2 filter → `BAD_REQUEST "Field 'secret' has a value type of ENCRYPTED_STRING and
cannot be queried using filter type EQUALS"`; C2 sort → accepted, meaningless order. A1 client guard
fires; server-side writing a schema-`ENCRYPTED` field to the **public** DB without the flag →
per-record `BAD_REQUEST "encrypted fields are not supported in the public database"`.
- DocC: `WorkingWithRecords.md` "Encrypted fields" section + fixed stale `createRecord`/`updateRecord`
symbol links (now include `encryptedFields:`); `AuthenticationAndDatabases.md` ADP `> Important` note.
- MistDemo `create --encrypted-fields a,b` (key `record.encrypted.fields`… see `MistDemoKeys+Record`);
shared single-record table header now "Found 1 record(s)" and `create` prints its own ✅ line.
- Last green: MistKit 689 tests, MistDemo 1020 tests, `./Scripts/lint.sh` clean (before the last
MistDemo edits — re-run).

### C3 answered (2026-09-14)
Writing `isEncrypted` to a field the schema declares **plain** → `BAD_REQUEST
"Attempt to save encrypted data in non encrypted field type"`. Note this differs from the
inverse direction (an `ENCRYPTED` field written **without** the flag), which reports
`invalid attempt to set value type ENCRYPTED_BYTES … defined to be: ENCRYPTED_STRING`.
The schema declaration governs; the flag must agree with it both ways. Control
(`secret:string:… --encrypted-fields secret`) succeeded and the read-back echoed
`"encryptedFields":["secret"]` with the value in plaintext. Posted to #392; the DocC
bullet "Existing fields cannot be converted" now carries both strings.

### Pitfall that cost time — RESOLVED, it was a CLI bug (issue #487)
The earlier "No fields provided" failures were **not** zsh word-splitting (each flag was
quoted explicitly and it still failed). A comma-bearing `--field` value is mis-parsed by
`CommandLineArgumentsProvider`: `MistDemoKeys.Record.field` is an `OptionalConfigKey<String>`
and swift-configuration's `arraySeparator` defaults to `,`, so the value reads back as nil
and `CreateConfig.parseFieldsFromSources` throws `noFieldsProvided`. Proof: the **same**
string via `CLOUDKIT_FIELD=…` env works; `--field "title:string:C3 probe"` (no comma, spaces
fine) works; two separate `--field` flags also fail. Pre-existing, not a #392 regression.
**Workaround for live probes: one `--field` per value, no commas, or use the env var.**

### Remaining
- ADP (#486) stays blocked — no supported way to get a `ckWebAuthToken` for a third-party
container while ADP is on.
- `Examples/MistDemo/.env` has **two** `CLOUDKIT_WEB_AUTH_TOKEN` lines (6 and 9) with
different values. Which wins is unverified; auth currently works, but edit the wrong one
and you will debug a "fresh" token that is not in effect. Worth de-duplicating.
- Leave `EncryptedFieldsPhase` pre-existing lint warnings (function length, type order)
unless cheap.
33 changes: 33 additions & 0 deletions .claude/memory/reference_android_emulator_flake.md
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---
name: reference_android_emulator_flake
description: Android CI can fail after a fully successful build when the emulator never starts — adb "could not connect to TCP port 5554"; re-run, don't debug the code
metadata:
type: reference
---

A `Build on Android (<swift>, <api>)` job can fail with **no compiler error at all**. The signature,
observed 2026-09-14 on `Build on Android (6.3, 33)` (run 34888402078):

```
[1195/1204] Compiling MistKitTests QueryFilterTests+ComplexFields.swift
[1200/1208] Emitting module MistKitPackageDiscoveredTests
[1207/1211] Emitting module MistKitPackageTests
error: could not connect to TCP port 5554: Connection refused
The process '.../platform-tools/adb' failed with exit code 1
##[error]The process '/usr/bin/sh' failed with exit code 1
```

The Swift build **completed** — every target compiled and both test modules emitted. The failure is
`skiptools/swift-android-action` failing to reach the emulator over adb, i.e. the AVD never came up.

**Why this matters:** the failing step is `Run brightdigit/swift-build@v1`, so `gh pr checks` just
says the Android job failed, and it looks like a source break. It is not. Distinguish it from a real
failure by checking for `Emitting module MistKitPackageTests` in the log — if that line is present and
there is no `error:` from swift-frontend, the code built fine.

**How to apply:** re-run the job (`gh run rerun <run-id> --job <job-id>`) rather than changing source.
Corroborating check: the other Android matrix entries (other Swift versions / API levels) pass on the
same commit — a genuine source break fails all of them, a flake fails one. Distinct from
[[reference_wasm_ci_signatures]] (wasm OOM vs SDK-download curl exit 7) and from
[[reference_windows_62_mistkittests_emit_abort]] (Windows 6.2, which fails *before* emitting
MistKitTests and is a real size tip-over).
34 changes: 34 additions & 0 deletions .claude/memory/reference_lint_needs_mise_trust.md
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---
name: reference_lint_needs_mise_trust
description: An untrusted mise.toml makes Scripts/lint.sh silently use the wrong SwiftLint and skip Periphery, producing phantom findings
metadata:
type: reference
---

`Scripts/lint.sh` puts mise-managed tools on PATH via `eval "$(mise -C "$PACKAGE_DIR" env -s bash)"`.
If `mise.toml` is **untrusted** in this worktree, that `eval` silently produces nothing — mise exits
with `error parsing config file … are not trusted` on stderr and the script keeps going. The run then
uses whatever is on the bare PATH instead of the pinned versions.

Observed 2026-09-14 in the `392-encrypted-fields` worktree:

- SwiftLint fell back to bare **0.65.1** instead of the pinned **0.62.2**, inventing two
`superfluous_disable_command` errors against `force_unwrapping` disable blocks in
`CloudKitService.swift` and `Sharing/CreatedShare.swift`. Both files are untouched by the branch and
carry the same blocks on `main`; the pinned version does not flag them. Acting on those would have
deleted disable blocks that `.claude/agent-notes.md` explicitly endorses.
- **Periphery exited 127** (not installed on the bare PATH), so that leg never ran while still being
reported as `"skipped": false`.

**Why:** a lint report that looks complete but silently ran the wrong tools is worse than no report —
the phantom findings point at correct, deliberate code.

**How to apply:** run `mise trust` once per worktree (each `git trees add` worktree needs its own),
then confirm `mise exec -- swiftlint version` reports the pinned version and
`mise exec -- periphery version` resolves before believing a lint run. In the JSON report, treat
`periphery.exitCode == 127` or a surprise SwiftLint rule as "the tools were wrong", not "the code is
wrong". Verify with `swift-format`/`swiftlint`/`swift-build`/`periphery` all at `exitCode` 0.

Note `Scripts/lint.sh` also shells out to `swift build`; see [[reference_use_xcrun_for_swift]] — under
the swiftly-managed toolchain that leg crashes swift-frontend and reports `exitCode: 1`, which is
likewise a toolchain artifact rather than a code error.
34 changes: 34 additions & 0 deletions .claude/memory/reference_use_xcrun_for_swift.md
Comment thread
leogdion marked this conversation as resolved.
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---
name: reference_use_xcrun_for_swift
description: On macOS, when swiftly lacks the pinned toolchain, run Swift via xcrun — the swiftly-managed swift crashes swift-frontend
metadata:
type: reference
---

**On macOS only, and only when swiftly has no toolchain matching the pinned `.swift-version`**,
invoke Swift through `xcrun` — `xcrun swift build`, `xcrun swift test` — rather than the bare
`swift` on PATH. When swiftly *does* have the pinned toolchain, use it; this is a fallback, not a
blanket rule.

`xcrun` is an Xcode tool and **does not exist on Linux**. Ubuntu CI and any Linux agent invoke
`swift` directly — applying this rule there breaks the build.

Observed 2026-09-14 on the `392-encrypted-fields` worktree: the swiftly-managed default
(`~/Library/Developer/Toolchains/swift-6.3.2-RELEASE.xctoolchain`, matching the root `.swift-version`
of `6.3.2`) **crashed swift-frontend** with a stack dump while building the root package. `xcrun`
resolves to `/Applications/Xcode.app/…/XcodeDefault.xctoolchain` (Swift 6.4) and builds and tests
cleanly: 689 root tests, 1020 MistDemo tests.

`xcrun` also sidesteps a second problem: `Examples/MistDemo/.swift-version` pins `6.4`, and swiftly has
only `6.4.x-snapshot-*` installed (no release 6.4), so swiftly refuses to run there at all
("uses toolchain version 6.4, but it doesn't match any of the installed toolchains").

**Why:** a swift-frontend crash reads like a code error but is a toolchain artifact. It also corrupts
the `Scripts/lint.sh` report, whose `swift-build` leg exits 1 for the same reason — see
[[reference_lint_needs_mise_trust]].

**How to apply:** prefix Swift commands with `xcrun`. When a script shells out to `swift` internally
(`Scripts/lint.sh` does), put the Xcode toolchain first on PATH for that invocation:
`export PATH="$(dirname "$(xcrun --find swift)"):$PATH"`. Beware that piping to `tail`/`grep` makes
`$?` the pipe's exit code, not the compiler's — capture `${PIPESTATUS[0]}` or echo an explicit
`EXIT=$?` marker before filtering, or a crashed build reads as success.
16 changes: 16 additions & 0 deletions .claude/memory/reference_windows_62_mistkittests_emit_abort.md
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Expand Up @@ -11,3 +11,19 @@ On Windows + Swift **6.2 only**, `swift build --build-tests` can die with exit 1
Tip-over is MistKitTests size/complexity — converting `WebAuthTokenManager` actor→class did **not** fix it. Mitigation: omit tip-over **test bodies** at compile time with `#if !(os(Windows) && compiler(>=6.2) && compiler(<6.3))` / `#else Issue.record`, keep `@Test`/`@Suite`/mocks compiled, and `.disabled(if: Platform.isWindowsSwift62)` for runtime. Do not use `.disabled(if:)` alone — that still compiles. See `.claude/docs/research/windows-6.2-ci-failure-462.md`.

`Issue.record` stubs must pass a **string literal** (→ `Comment`), not a `String` variable — on Windows Swift 6.2 `Issue.record(someString)` fails with `argument type 'String' does not conform to expected type 'Error'` (#484).

**Recurred 2026-09-14 on #392 / PR #485 (issue #488).** The threshold is bracketed by measured
`Tests/MistKitTests` totals: **24,858 lines / 258 files was green** (`eea8824`); **25,612 / 261
failed** (`a70f007`, after rebasing onto `v1.0.0-beta.6`). Body-gating 8 more tests did *not*
recover it (25,649 lines — gating adds source lines even as it removes emitted IR), so once the
module is over, shaving a few suites is not enough.

Note `v1.0.0-beta.6` has **never run the MistKit matrix** (its pushes only trigger MistDemo
Integration and CodeQL), so whether beta.6 alone crosses the threshold is untested — do not assume
it is inherited.

Windows 6.2 is now `continue-on-error: ${{ matrix.swift.version == 'swift-6.2-release' }}` on the
`build-windows` job in `.github/workflows/MistKit.yml`, which also unblocks the `lint` job (its
`if: !failure()` + `needs: [... build-windows ...]` made it report `skipping`). That **masks** the
symptom; #488 tracks the real fix, whose durable options are splitting `MistKitTests` into two
targets or dropping the 6.2 toolchain.
6 changes: 6 additions & 0 deletions .github/workflows/MistKit.yml
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Expand Up @@ -134,6 +134,12 @@ jobs:
needs: configure
runs-on: ${{ matrix.runs-on }}
if: ${{ needs.configure.outputs.full-matrix == 'true' && !contains(github.event.head_commit.message, 'ci skip') }}
# Swift 6.2 on Windows silently aborts while emitting MistKitTests once the test
# module crosses a size threshold: no `error:`, no stack dump, just exit 1 with
# `Emitting module MistKitTests` absent from the log. It is a toolchain bug — 6.1
# and 6.3 build the same commit — so it is reported but does not gate merges.
# Tracked in #488; remove this once that is resolved (or 6.2 is dropped).
continue-on-error: ${{ matrix.swift.version == 'swift-6.2-release' }}
strategy:
fail-fast: false
matrix:
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