docs: implementation plan (TTY precedents folded in); task decomposition (17 tasks)

Plan updated with the alknet-tty findings: the drainer pattern
(single ordered writer) makes outbound chunk-boundary parsing sound;
TestStdinSink's try_send→Full→Pending is the inbound backpressure
precedent; OQ-01(a) now cites the reference.

Task graph (taskgraph-validated, 17 tasks, 6 generations, no cycles):
- tasks/server/: core-types, auth, healthz-decoy, adapter
- tasks/gateway/: dispatch, routes, publish
- tasks/websocket/: byte-adapter (research POC), upgrade-session, overlay-ops
- tasks/adapters/: from-openapi, from-jsonschema, to-openapi, from-wss, mcp
- tasks/client/: http-host
- tasks/infra/: integration-suite (phase 4)

Critical path runs through server core → adapter → WS session →
overlay tests → integration suite. High-risk tasks are the three WS
tasks, de-risked by the ws-byte-adapter POC blocking upgrade-session.

tasks/infra/integration-suite.md

@@ -0,0 +1,44 @@
+---
+id: infra-integration-suite
+name: Full-surface integration suite + docs sync + publish prep
+status: pending
+depends_on: [gateway-publish, adapter-to-openapi, adapter-from-wss, adapter-mcp, ws-overlay-ops]
+scope: moderate
+risk: medium
+impact: project
+level: review
+tags: [infra, phase-4]
+---
+
+## Description
+
+Phase 4 hardening. (1) Integration suite exercising the full surface
+over DuplexStream + in-process WSS: gateway 6 endpoints, WS session
+(call + data channel + overlay), from_openapi import → call → error
+fidelity, from_wss import over the WS server, mcp feature interplay.
+(2) Docs sync: port-notes sections stripped from ported ADRs/specs
+after review, open-questions.md statuses updated (OQ-01/02 → resolved),
+README doc table final. (3) Publish prep: `cargo publish --dry-run
+--allow-dirty`, semver/API surface check against AGENTS.md conventions,
+Cargo.toml metadata polish.
+
+## Acceptance Criteria
+
+- [ ] `cargo test --all-features` green; clippy `-D warnings` green; fmt green
+- [ ] Full-surface integration test passing (gateway + WS + one adapter each direction)
+- [ ] Port notes stripped; OQ statuses updated
+- [ ] `cargo publish --dry-run --allow-dirty` succeeds
+- [ ] taskgraph shows all tasks completed
+
+## References
+
+- docs/plans/implementation.md (§Build order, Phase 4)
+- AGENTS.md (verification commands, commit conventions)
+
+## Notes
+
+> Agent fills during implementation.
+
+## Summary
+
+> Agent fills on completion.