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openspec/archive/2026-05-25-api-router-worker-bridge/tasks.md

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+# Tasks — `@suaveplan/api-router-worker-bridge`
+
+> Every checkbox MUST reflect work actually done in this change.
+
+## 0. Pre-flight (non-negotiable)
+
+- [ ] 0.1 Confirm clean working tree (`git status` reports nothing) and no in-flight worktrees with uncommitted work (`git worktree list` then `git status` in each)
+- [ ] 0.2 If any worktrees exist under `.claude/worktrees/`, account for each one: still-active agent, work-pending-merge, or stale-and-prune. Stale worktrees MUST be removed (`git worktree remove`) before opening a new one — code that has been lost twice on main is the failure mode this guards against.
+- [ ] 0.3 Confirm the package set in `MANIFEST.md` matches `find packages -maxdepth 3 -name package.json` count. Drift here means a prior change archived without regenerating the manifest.
+
+## 1. Spec authoring
+
+- [x] 1.1 Read design doc §6 (per-request data flow) + §5.2a
+- [x] 1.2 Read umbrella
+- [x] 1.3 Read `openspec/AGENTS.md` Sections 13 and 14
+- [x] 1.4 Draft `proposal.md`
+- [x] 1.5 Draft `specs/api-router-worker-bridge/spec.md`
+- [ ] 1.6 Every requirement carries `**Verified by:**`
+
+## 2. Implementation
+
+- [ ] 2.1 Scaffold `packages/api/api-router-worker-bridge/` (`0.1.0`, deps: `@suaveplan/api-worker-rpc`, `@suaveplan/api-types`, `@suaveplan/error`, `zod`)
+- [ ] 2.2 `src/main-side/` — `BridgeMain.dispatch(routeHit) → Promise<Response>`
+- [ ] 2.3 `src/worker-side/` — `BridgeWorker.serve(handler)` accepts envelopes from main
+- [ ] 2.4 `src/envelope-schemas/` — Zod schemas for `HttpDispatchEnvelope` + `HttpResponseEnvelope`
+- [ ] 2.5 `src/streaming-marshal/` — `Transferable` stream marshalling both directions
+- [ ] 2.6 `src/header-allowlist/` — default deny list (`authorization`, `cookie`, `set-cookie`, `x-csrf-token`); per-route allowlist
+- [ ] 2.7 `src/error-codes.ts` — every `BRIDGE_*` code
+- [ ] 2.8 `src/index.ts` — namespace re-exports
+- [ ] 2.9 Conformance: bridge MUST pass `runRouterConformance` (Stage 4 gate) under worker-proxy surface
+
+## 3. Tests
+
+- [ ] 3.1 `src/main-side/main-side.test.ts` — given route match + body, envelope sent + response rehydrated
+- [ ] 3.2 `src/worker-side/worker-side.test.ts` — envelope decoded; handler invoked with reconstructed ctx; response envelope sent
+- [ ] 3.3 `src/envelope-schemas/envelope-schemas.test.ts` — invalid envelope rejected (`BRIDGE_ENVELOPE_INVALID`)
+- [ ] 3.4 `src/streaming-marshal/streaming-marshal.test.ts` — large request stream + large response stream both round-trip with back-pressure
+- [ ] 3.5 `src/header-allowlist/header-allowlist.spec-conformance.test.ts` — `expectTypeOf` AND runtime assertions that `Authorization` / `Cookie` are NEVER in `ctx.request.headers` worker-side
+- [ ] 3.6 `tests/no-raw-request.test.ts` — pin invariant: envelope never carries `Request` reference; raw `Request` is unreachable from worker
+- [ ] 3.7 Every `it(...)` carries `{ timeout: 5000 }`
+
+## 4. Documentation
+
+- [ ] 4.1 Sibling `.md` for every implementation `.ts` (≥200 words, basic + advanced examples)
+- [ ] 4.2 README links every co-located `.md`; explicitly call out the no-raw-`Request` invariant
+- [ ] 4.3 Update CLAUDE.md
+
+## 5. Pre-archive verification (the 5-gate triple)
+
+- [ ] 5.1 `bun run check` — Biome 0/0/0
+- [ ] 5.2 `bunx turbo lint typecheck test --filter=@suaveplan/api-router-worker-bridge` — green
+- [ ] 5.3 `bunx turbo test:coverage --filter=@suaveplan/api-router-worker-bridge` — 100/100/100/100
+- [ ] 5.4 `bun scripts/openspec-conformance.ts @suaveplan/api-router-worker-bridge` — exit 0
+- [ ] 5.5 `bunx turbo build --filter=@suaveplan/api-router-worker-bridge` — green
+- [ ] 5.6 **Conformance gate**: `runRouterConformance` from `@suaveplan/api-router/testing` passes against the bridge as the surface — required before Stage 4 can complete
+
+## 6. Pre-archive 7-row checklist
+
+- [ ] 6.1 Generics threaded; `expectTypeOf` proves response type preserved across bridge
+- [ ] 6.2 Zod schemas validate envelopes on both sides
+- [ ] 6.3 Every `BRIDGE_*` code thrown from a production path
+- [ ] 6.4 Strict-mode behaviors (header allowlist on/off configurable; strict default)
+- [ ] 6.5 OTel — N/A (host's request span continues across bridge; bridge adds `api.bridge.dispatch` child span tested with `InMemoryMetricExporter`)
+- [ ] 6.6 Lifecycle dedup — N/A
+- [ ] 6.7 No retroactive tick
+
+## 7. Archive
+
+- [ ] 7.1 Fold spec delta into `openspec/specs/api-router-worker-bridge/spec.md`
+- [ ] 7.2 Move to `openspec/archive/<yyyy-mm-dd>-api-router-worker-bridge/`
+- [ ] 7.3 Tick Stage-3 row in umbrella
+- [ ] 7.4 Refresh `MANIFEST.md`