chore(typescript): upgrade to TypeScript 7 (native Go compiler)

[waleedlatif1]

Summary

• Bump typescript to ^7.0.2 across every workspace package (the native Go-ported compiler)
• apps/sim's type-check still needs the same ~8GB heap (confirmed both compilers OOM without it, on this codebase); with matched heap flags across 3 repeated trials each, TS7 is only modestly faster (~67s avg vs ~72s avg, 7%) — an earlier claim of a 55s→7s speedup here was a bad single-run benchmark (no heap flag, got lucky) and is retracted
• Full bun run type-check / lint / build / test all pass across the whole monorepo

Why the migration touched more than a version bump

TS7 tightens several defaults. Fixed each properly rather than papering over it:

• baseUrl is removed outright — dropped it from 5 tsconfigs (paths already resolve relative to the tsconfig's own directory, so this is a no-op behavior-wise) and prefixed the one bare paths entry each in apps/sim/apps/realtime with ./
• moduleResolution=node10 is removed — switched packages/cli and packages/ts-sdk to bundler, matching the rest of the repo
• types now defaults to [] instead of auto-including every installed @types/* package — added "types": ["node"] once to the shared base tsconfig (this is a Node monorepo, so this restores the old behavior in one place instead of duplicating it across a dozen packages), added explicit @types/node deps where it's now relied on transitively, and added declare module '*.css' for the two packages with plain (non-module) CSS side-effect imports TS7's stricter checker now flags
• packages/logger's isomorphic typeof window check no longer needs DOM lib in every consumer — swapped it for 'window' in globalThis
• packages/testing/apps/realtime's fetch mocks model the browser Fetch API, so they need DOM lib where they're actually compiled
• the typescript npm package no longer exports the classic Compiler API from its main entry (moved to unstable/ast subpaths) — apps/sim's Function-block route used it at runtime to strip import statements from user code, so that one call site now uses Microsoft's official transition package, @typescript/typescript6
• Next.js 16.2.6's own TS-detection hardcodes a file path TS7 no longer ships and its auto-install fallback assumes npm/pnpm — added @typescript/native-preview as a devDependency to apps/sim/apps/docs so Next detects a valid compiler instead of trying (and failing) to auto-install one

Not merging yet

TS 7.0.2 was published today and is still inside this repo's bunfig.toml minimumReleaseAge (7-day) supply-chain gate — bun install will fail for everyone until 2026-07-15. Opening this now to get it through review; holding the actual merge until the gate clears.

Type of Change

• Chore / dependency upgrade

Testing

• bun run type-check — 19/19 packages pass
• bun run lint:check — pass (2 pre-existing warnings in apps/docs, unrelated)
• bun run build — pass (apps/sim, apps/docs, cli, ts-sdk all build clean)
• bun run test — 10,769/10,769 tests pass (1 pre-existing env-config test-file failure reproduces identically on unmodified staging, not a regression)

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview, Comment	Jul 8, 2026 11:44pm

[cursor]

PR Summary

Medium Risk
Wide toolchain bump affects every package’s type-check and build; the function execute route’s dependency on @typescript/typescript6 is a behavioral change on a user-code execution path.

Overview
Upgrades TypeScript from 5.x to ^7.0.2 across apps and packages, with lockfile updates for the native TS7 toolchain and @typescript/native-preview on apps/sim and apps/docs so Next.js 16 can detect a valid compiler.

TS7 config tightening: removes deprecated baseUrl from several tsconfigs and normalizes paths to ./-prefixed entries; sets "types": ["node"] on the shared @sim/tsconfig base; adds explicit @types/node where needed; gives DOM lib to packages that type-check fetch/browser APIs; switches packages/cli and packages/ts-sdk to module / moduleResolution nodenext; adds declare module '*.css' where plain CSS imports are type-checked.

Runtime / small code fixes: the function execute route now loads @typescript/typescript6 instead of typescript for parsing user JS imports (TS7 no longer exposes the classic compiler API on the main entry). @sim/logger uses globalThis instead of typeof window for the browser guard so consumers do not need DOM types.

^{Reviewed by Cursor Bugbot for commit 41d6286. Configure here.}

[greptile-apps]

Greptile Summary

This PR upgrades the monorepo to TypeScript 7 and adjusts the codebase for the new compiler behavior. The main changes are:

• TypeScript dependency bumps across workspace packages.
• Updated tsconfig settings for removed baseUrl and NodeNext module resolution.
• Added explicit Node, DOM, CSS, and native-preview dependencies where needed.
• Switched the function execute route to the TypeScript 6 transition package for compiler API usage.
• Preserved the logger browser-production guard without requiring DOM types.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
packages/logger/src/index.ts	Updated the production browser check to avoid DOM typings while keeping the intended runtime behavior.
packages/ts-sdk/tsconfig.json	Changed the published SDK package to NodeNext module and resolution settings.
packages/cli/tsconfig.json	Changed the CLI package to NodeNext module and resolution settings for its Node ESM output.
apps/sim/app/api/function/execute/route.ts	Updated the runtime TypeScript compiler API import to use the TypeScript 6 transition package.

_{Reviews (2): Last reviewed commit: "fix(typescript): address Greptile review..." | Re-trigger Greptile}

[waleedlatif1]

@greptile

[waleedlatif1]

@cursor review

[cursor]

✅ Bugbot reviewed your changes and found no new issues!

Comment @cursor review or bugbot run to trigger another review on this PR

^{Reviewed by Cursor Bugbot for commit 41d6286. Configure here.}

[waleedlatif1]

Correction: the 55s→7s speedup claim in the original PR description was a bad benchmark (single run, no heap flag, got lucky). Re-benchmarked properly (3 trials each, matched NODE_OPTIONS='--max-old-space-size=8192' on both sides, confirmed both compilers OOM without it on this codebase): TS7 averages ~67s vs TS 5.7.3's ~72s for apps/sim's full type-check — a modest ~7% improvement, not a dramatic one. Updated the PR description. The migration is still worth it for TS7 support going forward, just not for the performance win I originally claimed.