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openspec/archive/2026-05-25-api-events-worker-proxy/tasks.md

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+# Tasks — `@suaveplan/api-events-worker-proxy`
+
+> Every checkbox MUST reflect work actually done in this change.
+
+## 0. Pre-flight (non-negotiable)
+
+- [x] 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)
+- [x] 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.
+- [x] 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 §5.2a, §5.2b, §6
+- [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-events-worker-proxy/spec.md`
+- [x] 1.6 Every requirement carries `**Verified by:**`
+
+## 2. Implementation
+
+- [x] 2.1 Scaffold `packages/api/api-events-worker-proxy/` (`0.1.0`, deps: `@suaveplan/api-worker-rpc`, `@suaveplan/events`, `@suaveplan/api-types`, `@suaveplan/error`, `zod`)
+- [x] 2.2 `src/client/` — typed proxy client factory
+- [x] 2.3 `src/publisher/` — `emit(topic, payload)` marshalling
+- [x] 2.4 `src/subscriber/` — `on` / `off` / `once`; backpressure
+- [x] 2.5 `src/error-codes.ts` — `EVENTS_PROXY_*` codes
+- [x] 2.6 `src/testing/` — paired `MessageChannel` + stub bus
+- [x] 2.7 `src/index.ts` — namespace re-exports
+
+## 3. Tests
+
+- [x] 3.1 `src/publisher/publisher.test.ts` — allowed emit round-trips; disallowed throws `EVENTS_PROXY_TOPIC_NOT_ALLOWED`
+- [x] 3.2 `src/subscriber/subscriber.test.ts` — handler invocation; `off` cancels; backpressure throttles
+- [x] 3.3 `src/subscriber/handler-throw.test.ts` — worker-side handler throw surfaces as `EVENTS_PROXY_HANDLER_THROW` main-side
+- [x] 3.4 `tests/conformance/run-events-bus-conformance.test.ts` — `runEventsBusConformance` passes
+- [x] 3.5 Every `it(...)` carries `{ timeout: 5000 }`
+
+## 4. Documentation
+
+- [x] 4.1 Sibling `.md` per `.ts` (≥200 words)
+- [x] 4.2 README links every co-located `.md`; explicit note that this proxies over the existing `@suaveplan/events` (no new contract)
+- [x] 4.3 Update CLAUDE.md
+
+## 5. Pre-archive verification (the 5-gate triple)
+
+- [x] 5.1 `bun run check` — Biome 0/0/0
+- [x] 5.2 `bunx turbo lint typecheck test --filter=@suaveplan/api-events-worker-proxy` — green
+- [x] 5.3 `bunx turbo test:coverage --filter=@suaveplan/api-events-worker-proxy` — 100/100/100/100
+- [x] 5.4 `bun scripts/openspec-conformance.ts @suaveplan/api-events-worker-proxy` — exit 0
+- [x] 5.5 `bunx turbo build --filter=@suaveplan/api-events-worker-proxy` — green
+- [x] 5.6 **Stage-4 conformance gate**: `runEventsBusConformance` (from `@suaveplan/events/testing`) MUST pass under both direct AND worker-proxy surface before Stage 4 can complete
+
+## 6. Pre-archive 7-row checklist
+
+- [x] 6.1 Generics threaded (`EventBusLike` shape preserved through proxy)
+- [x] 6.2 Zod at wire boundary (payload envelopes)
+- [x] 6.3 Every `EVENTS_PROXY_*` code thrown
+- [x] 6.4 Strict-mode behaviors — backpressure drop vs throttle configurable
+- [x] 6.5 OTel — N/A here; main-side bus emits event metrics
+- [x] 6.6 Lifecycle dedup — N/A
+- [x] 6.7 No retroactive tick
+
+## 7. Archive
+
+- [x] 7.1 Fold spec delta into `openspec/specs/api-events-worker-proxy/spec.md`
+- [x] 7.2 Move to `openspec/archive/<yyyy-mm-dd>-api-events-worker-proxy/`
+- [x] 7.3 Tick Stage-3 row in umbrella
+- [x] 7.4 Refresh `MANIFEST.md`