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/003-redis-adapter-tests.md

@@ -0,0 +1,50 @@
+---
+id: redis-adapter-tests
+name: Write tests for Redis event target adapter
+status: pending
+depends_on: [core-pubsub-tests]
+scope: moderate
+risk: medium
+impact: component
+level: implementation
+---
+
+## Description
+
+The Redis event target adapter (`event-target-redis.ts`) is implemented but has zero tests. The architecture doc lists 7 specific test scenarios. Tests need a running Redis instance or a mock. Since this is a dev dependency, we can use `ioredis-mock` or start a Redis container in CI. The test strategy needs to handle the Redis dependency.
+
+The architecture specifies these test scenarios:
+1. Publish path — dispatchEvent sends to Redis with correct channel and serialized envelope
+2. Subscribe path — addEventListener subscribes to Redis, onMessage dispatches to local listeners
+3. Unsubscribe — removeEventListener unsubscribes from Redis when no listeners remain for a topic
+4. Topic scoping — type:id topics are correctly formed
+5. Envelope serialization — full `{ type, id, payload }` round-trips through JSON
+6. Multiple listeners — multiple listeners on same topic, single Redis subscribe
+7. Error propagation — what happens on connection failure
+
+Note: test 7 (error propagation) is partially blocked by the missing error handling in the current implementation (tracked in task `redis-channel-prefix-and-error-handling`). The test should exist but may need to be adjusted once error handling is added.
+
+## Acceptance Criteria
+
+- [ ] `test/event-target-redis.test.ts` exists and passes
+- [ ] Test approach for Redis dependency is decided (mock, container, or ioredis-mock)
+- [ ] Test: dispatchEvent publishes correct channel and serialized envelope
+- [ ] Test: addEventListener subscribes to Redis and dispatches to local listeners
+- [ ] Test: removeEventListener unsubscribes from Redis when no listeners remain
+- [ ] Test: type:id topic scoping works correctly
+- [ ] Test: EventEnvelope round-trips through JSON serialization
+- [ ] Test: multiple listeners on same topic result in single Redis subscribe
+- [ ] Test: custom serializer option works
+
+## References
+
+- docs/architecture/event-targets/redis.md
+- src/event-target-redis.ts
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion