docs(01.1-03): complete process module testing and events plan

Tasks completed: 2/2
- Write unit tests for ProcessRegistry and ProcessManager
- Refactor ProcessManager to emit events via event bus

SUMMARY: .planning/phases/01.1-hexagonal-architecture/01.1-03-SUMMARY.md

.planning/phases/01.1-hexagonal-architecture/01.1-03-SUMMARY.md

@@ -0,0 +1,103 @@
+---
+phase: 01.1-hexagonal-architecture
+plan: 03
+subsystem: process
+tags: [vitest, testing, events, process-lifecycle, hexagonal]
+
+# Dependency graph
+requires:
+  - phase: 01.1-01
+    provides: EventBus port interface and domain event types
+provides:
+  - Comprehensive test coverage for ProcessRegistry and ProcessManager
+  - ProcessManager event emission via optional EventBus
+  - ProcessSpawned, ProcessStopped, ProcessCrashed events on process lifecycle
+affects: [01.1-04, 01.1-05, 01.1-06]
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns: [optional-dependency-injection, mock-based-testing]
+
+key-files:
+  created:
+    - src/process/registry.test.ts
+    - src/process/manager.test.ts
+  modified:
+    - src/process/manager.ts
+
+key-decisions:
+  - "EventBus is optional parameter for backwards compatibility"
+  - "Events emitted inline (synchronous) - no async event handling needed"
+  - "Mock execa module in tests to avoid spawning real processes"
+
+patterns-established:
+  - "Optional eventBus parameter pattern for event emission"
+  - "Exit handler emits appropriate event based on exit code (stopped vs crashed)"
+
+# Metrics
+duration: 3min
+completed: 2026-01-30
+---
+
+# Phase 1.1 Plan 03: Process Module Testing and Events Summary
+
+**Comprehensive test coverage for ProcessRegistry and ProcessManager with domain event emission for process lifecycle coordination**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-01-30T13:01:08Z
+- **Completed:** 2026-01-30T13:04:00Z
+- **Tasks:** 2
+- **Files modified:** 3
+
+## Accomplishments
+
+- ProcessRegistry fully tested (15 tests covering register, get, getAll, updateStatus, unregister, getByPid, clear)
+- ProcessManager fully tested (20 tests covering spawn, stop, stopAll, restart, isRunning, event emission)
+- ProcessManager now accepts optional EventBus for domain event emission
+- ProcessSpawned event emitted after successful spawn
+- ProcessStopped event emitted on normal exit (code 0)
+- ProcessCrashed event emitted on non-zero exit with signal
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Write unit tests for ProcessRegistry and ProcessManager** - `b556c10` (test)
+2. **Task 2: Refactor ProcessManager to emit events via event bus** - `3b24cf2` (feat)
+
+## Files Created/Modified
+
+- `src/process/registry.test.ts` - 15 tests for ProcessRegistry CRUD operations
+- `src/process/manager.test.ts` - 20 tests for ProcessManager lifecycle and events
+- `src/process/manager.ts` - Added optional eventBus parameter and event emission
+
+## Decisions Made
+
+1. **Optional eventBus parameter** - Backwards compatible; events only emitted if eventBus provided
+2. **Synchronous event emission** - Events emitted inline during spawn/exit; no async handling needed for in-process bus
+3. **Mock execa in tests** - Avoid spawning real processes; control subprocess behavior via mock
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Process module fully tested with 35 tests
+- Event emission enables coordination between modules
+- Ready for 01.1-04: Server Event Integration
+
+---
+*Phase: 01.1-hexagonal-architecture*
+*Completed: 2026-01-30*