Decompose architecture into atomic, dependency-ordered tasks

19 tasks covering core testing, Redis hardening, WebSocket client/server
adapters, Worker adapter, and final review gates. Iroh adapters are tracked
as a deferred placeholder blocked on the @alkdev/iroh fork.

Phases: core validation → Redis hardening → review gate → WebSocket
adapters → review gate → Worker adapter → review gate → final validation.

tasks/015-deferred-iroh-adapters.md

@@ -0,0 +1,47 @@
+---
+id: deferred-iroh-adapters
+name: Iroh spoke and hub adapters (deferred)
+status: pending
+depends_on: [review-worker-adapter]
+scope: system
+risk: critical
+impact: project
+level: implementation
+---
+
+## Description
+
+The Iroh adapters (spoke and hub) are explicitly deferred pending the fork of `@rayhanadev/iroh` as `@alkdev/iroh` with Linux + WASM platform targets. The current `@rayhanadev/iroh` has one author and no tests, making it unsuitable for production use.
+
+This task is a placeholder to track the dependency. It cannot proceed until:
+1. The iroh-ts fork exists as `@alkdev/iroh` with Linux native + WASM builds
+2. The API surface (10 methods documented in `iroh-transport.md`) is validated against the fork
+3. The fork has basic test coverage
+
+The architecture docs specify:
+- **Iroh Spoke**: `createIrohSpokeEventTarget({ endpoint, hubNodeId, alpn? })` — connects to hub, opens bidirectional QUIC stream, implements subscription forwarding
+- **Iroh Hub**: `createIrohHubEventTarget({ endpoint, alpn? })` — accepts connections, manages fan-out with subscription tracking
+- Both use length-prefixed JSON framing (4-byte big-endian length prefix)
+- Both use `__subscribe`/`__unsubscribe` control protocol
+
+Do NOT start implementation until the fork is ready.
+
+## Acceptance Criteria
+
+- [ ] `@alkdev/iroh` package is available with Linux + WASM builds
+- [ ] Basic iroh API validation (connect, openBi, acceptBi, sendStream, recvStream)
+- [ ] This task should be split into separate tasks for spoke and hub once the fork is ready
+
+## References
+
+- docs/architecture/iroh-transport.md
+- docs/architecture/event-targets/iroh-spoke.md
+- docs/architecture/event-targets/iroh-hub.md
+
+## Notes
+
+> Blocked on @alkdev/iroh fork. Do not start until fork is ready.
+
+## Summary
+
+> To be filled on completion