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

Tasks — @suaveplan/api-events-worker-proxy

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

• 1.1 Read design doc §5.2a, §5.2b, §6
• 1.2 Read umbrella
• 1.3 Read openspec/AGENTS.md Sections 13 and 14
• 1.4 Draft proposal.md
• 1.5 Draft specs/api-events-worker-proxy/spec.md
• 1.6 Every requirement carries **Verified by:**

2. Implementation

• 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)
• 2.2 src/client/ — typed proxy client factory
• 2.3 src/publisher/ — emit(topic, payload) marshalling
• 2.4 src/subscriber/ — on / off / once; backpressure
• 2.5 src/error-codes.ts — EVENTS_PROXY_* codes
• 2.6 src/testing/ — paired MessageChannel + stub bus
• 2.7 src/index.ts — namespace re-exports

3. Tests

• 3.1 src/publisher/publisher.test.ts — allowed emit round-trips; disallowed throws EVENTS_PROXY_TOPIC_NOT_ALLOWED
• 3.2 src/subscriber/subscriber.test.ts — handler invocation; off cancels; backpressure throttles
• 3.3 src/subscriber/handler-throw.test.ts — worker-side handler throw surfaces as EVENTS_PROXY_HANDLER_THROW main-side
• 3.4 tests/conformance/run-events-bus-conformance.test.ts — runEventsBusConformance passes
• 3.5 Every it(...) carries { timeout: 5000 }

4. Documentation

• 4.1 Sibling .md per .ts (≥200 words)
• 4.2 README links every co-located .md; explicit note that this proxies over the existing @suaveplan/events (no new contract)
• 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-events-worker-proxy — green
• 5.3 bunx turbo test:coverage --filter=@suaveplan/api-events-worker-proxy — 100/100/100/100
• 5.4 bun scripts/openspec-conformance.ts @suaveplan/api-events-worker-proxy — exit 0
• 5.5 bunx turbo build --filter=@suaveplan/api-events-worker-proxy — green
• 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

• 6.1 Generics threaded (EventBusLike shape preserved through proxy)
• 6.2 Zod at wire boundary (payload envelopes)
• 6.3 Every EVENTS_PROXY_* code thrown
• 6.4 Strict-mode behaviors — backpressure drop vs throttle configurable
• 6.5 OTel — N/A here; main-side bus emits event metrics
• 6.6 Lifecycle dedup — N/A
• 6.7 No retroactive tick

7. Archive

• 7.1 Fold spec delta into openspec/specs/api-events-worker-proxy/spec.md
• 7.2 Move to openspec/archive/<yyyy-mm-dd>-api-events-worker-proxy/
• 7.3 Tick Stage-3 row in umbrella
• 7.4 Refresh MANIFEST.md