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

Tasks — @suaveplan/api-worker-rpc

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 §2.2, §5.2a, §6 (worker-marshalling paragraph)
• 1.2 Read umbrella openspec/changes/api-plugin-foundation/proposal.md
• 1.3 Read openspec/AGENTS.md Sections 13 and 14
• 1.4 Draft proposal.md
• 1.5 Draft specs/api-worker-rpc/spec.md
• 1.6 Every requirement carries a **Verified by:** line

2. Implementation

• 2.1 Scaffold packages/api/api-worker-rpc/ (0.1.0, sideEffects: false, deps: @suaveplan/error, @suaveplan/types, zod)
• 2.2 src/protocol/ — Zod-validated wire types
• 2.3 src/correlation/ — monotonic id generator + request/response table + orphan detection
• 2.4 src/abort/ — AbortSignal forwarding (caller AbortController → wire → callee AbortController)
• 2.5 src/streaming/ — ReadableStream marshal via Transferable; backpressure ack
• 2.6 src/error-reconstruction/ — SuaveplanError rebuild with depth-bounded cause chain
• 2.7 src/backpressure/ — outstanding-message budget + RPC_BACKPRESSURE
• 2.8 src/cloneable-guard/ — pre-send clone check + RPC_NOT_CLONEABLE
• 2.9 src/caller/ — createRpcCaller<T>(port): WorkerProxyOf<T>
• 2.10 src/callee/ — serveRpc<T>(port, impl)
• 2.11 src/error-codes.ts — every RPC_* code via defineCodes
• 2.12 src/testing/index.ts — paired MessageChannel factory for conformance harness
• 2.13 src/index.ts — namespace re-exports

3. Tests

• 3.1 src/correlation/correlation.test.ts — monotonic ids; orphan response detection (RPC_ORPHAN_RESPONSE)
• 3.2 src/abort/abort.test.ts — caller abort propagates; in-flight call rejects with AbortError; abort after settle is a no-op
• 3.3 src/streaming/streaming.test.ts — large stream chunked zero-copy; ack throttles producer; consumer cancel propagates
• 3.4 src/error-reconstruction/error-reconstruction.test.ts — round-trip preserves code AND cause chain AND details; non-Suaveplan → RPC_REMOTE_THROW
• 3.5 src/backpressure/backpressure.test.ts — outstanding budget enforced; exceeding throws RPC_BACKPRESSURE at caller BEFORE memory exhaustion
• 3.6 src/cloneable-guard/cloneable-guard.test.ts — function argument throws RPC_NOT_CLONEABLE synchronously at call site
• 3.7 src/caller/caller.spec-conformance.test.ts — expectTypeOf<ReturnType<Caller<T>["m"]>>().toEqualTypeOf<Promise<R>>()
• 3.8 tests/conformance/round-trip.test.ts — pair caller + callee over MessageChannel; every RPC_* code reachable
• 3.9 Every it(...) carries { timeout: 5000 }

4. Documentation

• 4.1 Sibling .md for every implementation .ts (≥200 words, basic + advanced examples, full API reference)
• 4.2 README links every co-located .md under ## Modules; explains the call/serve pair pattern
• 4.3 Update CLAUDE.md "Network / IO" package listing once shipped

5. Pre-archive verification (the 5-gate triple)

• 5.1 bun run check — Biome 0 errors / 0 warnings / 0 info
• 5.2 bunx turbo lint typecheck test --filter=@suaveplan/api-worker-rpc — green
• 5.3 bunx turbo test:coverage --filter=@suaveplan/api-worker-rpc — 100/100/100/100
• 5.4 bun scripts/openspec-conformance.ts @suaveplan/api-worker-rpc — exit 0
• 5.5 bunx turbo build --filter=@suaveplan/api-worker-rpc — green

6. Pre-archive 7-row checklist (AGENTS.md Section 13)

• 6.1 Generics threaded (createRpcCaller<T>, serveRpc<T>); expectTypeOf on WorkerProxyOf<T> derivation
• 6.2 Zod schemas at every wire boundary (RpcRequest / RpcResponse / etc.)
• 6.3 Every RPC_* code thrown by at least one production path
• 6.4 Strict-mode behaviors tested both on and off (backpressure budget configurable)
• 6.5 OTel — N/A (transport layer; consumers attach spans)
• 6.6 Lifecycle dedup — N/A (no FSM)
• 6.7 No retroactive tick

7. Archive

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