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/018-integration-test-ws-client-server.md

@@ -0,0 +1,47 @@
+---
+id: integration-test-ws-client-server
+name: Integration test: WebSocket client and server event targets together
+status: pending
+depends_on: [websocket-client-tests, websocket-server-tests]
+scope: moderate
+risk: medium
+impact: component
+level: implementation
+---
+
+## Description
+
+Test the WebSocket client and server adapters working together — a spoke subscribes via the client adapter, the hub fans out via the server adapter. This validates the full subscription control protocol end-to-end:
+
+1. Client connects to server
+2. Client calls `addEventListener` → sends `__subscribe` to server
+3. Server receives `__subscribe` → adds client to subscription map
+4. Server `dispatchEvent` on that topic → message sent only to subscribed client
+5. Client receives message → dispatches to local listeners
+6. Client calls `removeEventListener` → sends `__unsubscribe` to server
+7. Server removes client from subscription map
+
+This is also where we validate that `createPubSub` works with the WebSocket adapters.
+
+## Acceptance Criteria
+
+- [ ] Integration test: bidirectional communication between WS client and server
+- [ ] Integration test: subscription control protocol end-to-end
+- [ ] Integration test: topic-based fan-out — subscribed clients receive events, unsubscribed don't
+- [ ] Integration test: direct messaging via topic scoping `"direct:${spokeId}"`
+- [ ] Integration test: `createPubSub` works with WS client event target
+- [ ] Integration test: `createPubSub` works with WS server event target
+
+## References
+
+- docs/architecture/event-targets/websocket-client.md
+- docs/architecture/event-targets/websocket-server.md
+- docs/architecture/decisions/003-subscription-control-protocol.md
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion