- src/server/events.ts: in-process EventEmitter bus (AgentHubEventBus);
singleton per server process, unlimited listeners for SSE fan-out.
- src/server/routes.ts: GET /events SSE endpoint — keepalive every 25 s,
optional ?role= server-side filter, reply.hijack() for clean streaming;
eventBus.publish() called on every successful mutating route (POST tasks/
handoffs/decisions/memory, PATCH tasks/:id).
- src/cli/commands/watch.ts: SSE client using Node fetch + ReadableStream
reader; exports parseSSEBuffer + formatEvent for testability; --once flag
exits 0 after first event (turn-based agent use case); --role for client-
side filtering (additive to server-side filter).
- src/cli/index.ts: register agenthub watch command via resolveContext.
- tests/sse.test.ts: 18 new tests (74 total, all green) — unit tests for
parseSSEBuffer + formatEvent, integration tests for eventBus on each
mutation type, E2E SSE stream + role-filter tests over real HTTP.
Limitation (documented): only REST mutations through the server emit events.
Local-CLI writes (direct file+SQLite) are invisible to subscribers — a
filesystem-watch increment is deferred to a later phase.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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