docs(02-01): complete ServiceContext infrastructure plan
- Created SUMMARY.md with comprehensive execution details - Updated STATE.md: Phase 2 Plan 1 complete, 2 plans total completed - Added decisions: ServiceContext bundling, dispose() lifecycle separation, removeAllListeners() ordering - Self-check: PASSED (all files exist, commits verified, tests passing)
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matt
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2 changed files with 299 additions and 11 deletions
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@ -9,29 +9,30 @@ See: .planning/PROJECT.md (updated 2026-02-12)
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## Current Position
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Phase: 1 of 4 (Provider Plumbing) — COMPLETE
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Plan: All plans complete
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Status: Phase 1 complete
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Last activity: 2026-02-12 - Phase 1 execution complete (1/1 plans)
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Phase: 2 of 4 (Service Infrastructure)
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Plan: 1 of 3
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Status: Plan 02-01 complete
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Last activity: 2026-02-12 - Completed 02-01 (ServiceContext infrastructure)
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Progress: [██░░░░░░░░] 25% (1/4 phases)
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Progress: [███░░░░░░░] 37.5% (1.5/4 phases)
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## Performance Metrics
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**Velocity:**
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- Total plans completed: 1
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- Total plans completed: 2
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- Average duration: 4 min
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- Total execution time: 0.07 hours
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- Total execution time: 0.13 hours
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**By Phase:**
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| Phase | Plans | Total | Avg/Plan |
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|-------|-------|-------|----------|
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| 01 Provider Plumbing | 1 | 4 min | 4 min |
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| 02 Service Infrastructure | 1 | 4 min | 4 min |
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**Recent Trend:**
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- Last 5 plans: 4
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- Trend: Just started
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- Last 5 plans: 4, 4
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- Trend: Consistent velocity
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*Updated after each plan completion*
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@ -49,6 +50,9 @@ Recent decisions affecting current work:
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- Added getFileSystemProvider() getter to ProjectScanner for consistent provider access (01-01)
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- Threaded provider through all parseJsonlFile() call sites instead of relying on optional parameter fallback (01-01)
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- Refactored SubagentDetailBuilder to accept fsProvider and projectsDir as explicit parameters (01-01)
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- ServiceContext bundles all session-data services for single workspace isolation (02-01)
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- dispose() separate from stop() - stop pauses (reversible), dispose destroys (permanent) (02-01)
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- removeAllListeners() called LAST in dispose() to prevent events during cleanup (02-01)
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### Pending Todos
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@ -74,9 +78,9 @@ None yet.
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## Session Continuity
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Last session: 2026-02-12
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Stopped at: Phase 1 execution complete — ready for Phase 2 planning
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Stopped at: Completed 02-01 (ServiceContext and ServiceContextRegistry) — ready for 02-02
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Resume file: None
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---
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*Created: 2026-02-12*
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*Last updated: 2026-02-12 after Phase 1 execution complete*
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*Last updated: 2026-02-12 after completing 02-01-PLAN.md*
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284
.planning/phases/02-service-infrastructure/02-01-SUMMARY.md
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284
.planning/phases/02-service-infrastructure/02-01-SUMMARY.md
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---
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phase: 02-service-infrastructure
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plan: 01
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subsystem: service-lifecycle
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tags:
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- infrastructure
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- multi-context
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- lifecycle
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- memory-management
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dependency-graph:
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requires: []
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provides:
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- ServiceContext
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- ServiceContextRegistry
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- EventEmitter disposal pattern
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affects:
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- src/main/index.ts (will use ServiceContextRegistry in Phase 2 Plan 2)
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- IPC handlers (will get services from active context)
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tech-stack:
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added: []
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patterns:
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- Registry pattern for context management
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- Comprehensive dispose() with EventEmitter cleanup
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- Start/stop/dispose lifecycle separation
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key-files:
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created:
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- src/main/services/infrastructure/ServiceContext.ts
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- src/main/services/infrastructure/ServiceContextRegistry.ts
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modified:
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- src/main/services/infrastructure/FileWatcher.ts
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- src/main/services/infrastructure/DataCache.ts
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- src/main/services/infrastructure/index.ts
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decisions:
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- title: ServiceContext bundles all session-data services
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rationale: Isolation and lifecycle management for local vs SSH contexts
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- title: Local context is permanent, SSH contexts are ephemeral
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rationale: App always has local access, SSH can disconnect
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- title: dispose() is separate from stop()
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rationale: stop() pauses (reversible), dispose() destroys (permanent)
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- title: removeAllListeners() called last in dispose()
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rationale: Prevents event emission during cleanup, avoiding memory leaks
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metrics:
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duration: 4
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tasks_completed: 2
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files_created: 2
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files_modified: 3
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tests_added: 0
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tests_passing: 494
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commits: 2
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completed: 2026-02-12
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---
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# Phase 2 Plan 1: ServiceContext Infrastructure Summary
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ServiceContext bundle and ServiceContextRegistry coordinator created with comprehensive EventEmitter cleanup for multi-context support.
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## Overview
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Created the foundational infrastructure for multi-context support in claude-devtools. ServiceContext encapsulates all session-data services (ProjectScanner, SessionParser, SubagentResolver, ChunkBuilder, DataCache, FileWatcher) for a single workspace context (local or SSH). ServiceContextRegistry manages the Map of contexts, tracks the active context, and enforces lifecycle rules (local context is permanent, SSH contexts can be destroyed).
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**Key innovation:** Comprehensive dispose() methods on EventEmitter-based services prevent memory leaks during context switching by clearing all timers, tracking maps, and listeners in the correct order.
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## What Was Built
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### ServiceContext (src/main/services/infrastructure/ServiceContext.ts)
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Service bundle class that creates and owns all session-data services for one workspace:
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**Configuration:**
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- `id: string` - Unique identifier (e.g., 'local', 'ssh-myserver')
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- `type: 'local' | 'ssh'` - Context type
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- `fsProvider: FileSystemProvider` - Filesystem provider
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- `projectsDir?: string` - Projects directory (defaults to ~/.claude/projects)
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- `todosDir?: string` - Todos directory (defaults to ~/.claude/todos)
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**Services created in dependency order:**
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1. ProjectScanner(projectsDir, todosDir, fsProvider)
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2. SessionParser(projectScanner)
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3. SubagentResolver(projectScanner)
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4. ChunkBuilder()
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5. DataCache(MAX_CACHE_SESSIONS, CACHE_TTL_MINUTES, !disableCache)
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6. FileWatcher(dataCache, projectsDir, todosDir, fsProvider)
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**Lifecycle methods:**
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- `start()` - Activates file watching and cache cleanup
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- `stopFileWatcher()` - Pauses file watching (for context switch)
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- `startFileWatcher()` - Resumes file watching
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- `dispose()` - Destroys all resources (irreversible)
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**Disposed flag:** Prevents reuse after disposal, logs errors if start() called on disposed context.
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### ServiceContextRegistry (src/main/services/infrastructure/ServiceContextRegistry.ts)
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Registry coordinator that manages all contexts:
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**State:**
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- `contexts: Map<string, ServiceContext>` - All registered contexts
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- `activeContextId: string` - Currently active context (defaults to 'local')
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**Methods:**
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- `registerContext(context)` - Adds context to map (throws if ID exists)
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- `getActive()` - Returns active context (throws if not found)
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- `get(contextId)` - Returns context by ID or undefined
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- `has(contextId)` - Check existence
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- `switch(contextId)` - Switches to different context:
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- Stops old file watcher
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- Updates activeContextId
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- Starts new file watcher
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- Returns {previous, current} for IPC re-init
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- `destroy(contextId)` - Destroys SSH context:
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- Throws if contextId === 'local' (permanent context)
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- Calls context.dispose()
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- Removes from map
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- If destroying active context, switches to 'local'
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- `list()` - Returns array of {id, type} metadata
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- `dispose()` - Disposes ALL contexts (app shutdown only)
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**Enforcement:** Local context permanence enforced in destroy() method.
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### FileWatcher.dispose() (src/main/services/infrastructure/FileWatcher.ts)
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Comprehensive cleanup for EventEmitter-based service:
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**Cleanup sequence:**
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1. Call `stop()` - Closes watchers, clears most timers and maps
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2. Explicitly clear retry timer (redundant but explicit)
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3. Clear all debounce timers + debounceTimers map
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4. Clear catch-up interval timer
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5. Clear polling interval timer (SSH mode)
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6. Clear all tracking maps:
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- lastProcessedLineCount
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- lastProcessedSize
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- activeSessionFiles
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- polledFileSizes
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- processingInProgress
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- pendingReprocess
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7. **LAST:** Call `removeAllListeners()` - Prevents events during cleanup
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8. Set `disposed = true` flag
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**Disposed flag check:** Added to `start()` method to prevent restarting disposed watcher.
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### DataCache.dispose() (src/main/services/infrastructure/DataCache.ts)
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Simple cleanup for cache service:
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**Cleanup:**
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1. Clear cache Map
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2. Set `enabled = false`
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3. Set `disposed = true` flag
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**Note:** Auto-cleanup interval returned by `startAutoCleanup()` is managed by caller (ServiceContext), not stored internally, so no timer cleanup needed here.
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## Deviations from Plan
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None - plan executed exactly as written.
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## Technical Decisions
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### 1. ServiceContext owns cleanup interval handle
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**Decision:** ServiceContext stores the cleanup interval handle returned by `dataCache.startAutoCleanup()` and clears it in `dispose()`.
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**Rationale:** DataCache doesn't store the interval internally (it only returns it), so ownership belongs to the caller.
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### 2. removeAllListeners() called LAST in FileWatcher.dispose()
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**Decision:** EventEmitter cleanup happens after all other cleanup steps.
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**Rationale:** Prevents firing events (like 'file-change') during cleanup when internal state is partially cleared. Emitting events mid-cleanup can cause memory leaks if listeners try to access cleared maps.
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### 3. Separated start() check for disposal vs already watching
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**Decision:** Added explicit `if (this.disposed)` check before `if (this.isWatching)` in FileWatcher.start().
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**Rationale:** Disposal is a permanent error condition (log error), while already watching is a normal edge case (log warning). Clearer error messaging.
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### 4. Registry does NOT create local context in constructor
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**Decision:** ServiceContextRegistry constructor is empty - local context registered externally.
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**Rationale:** Local context creation requires mainWindow and NotificationManager wiring that exists in index.ts, not in registry constructor. Keeps registry focused on coordination, not initialization.
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## Testing Results
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**Type checking:** ✅ Passed (0 errors)
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**Test suite:** ✅ 494/494 tests passing (no regressions)
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Existing FileWatcher tests verify:
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- File watching lifecycle (start/stop)
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- Debouncing behavior
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- Error detection
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- SSH polling mode
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No new tests added (infrastructure code, tested via integration in Phase 2 Plan 2).
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## Verification
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**Created files exist:**
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```bash
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✅ src/main/services/infrastructure/ServiceContext.ts
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✅ src/main/services/infrastructure/ServiceContextRegistry.ts
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```
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**Exports updated:**
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```bash
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✅ infrastructure/index.ts exports ServiceContext and ServiceContextRegistry
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```
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**ServiceContext constructor creates all 6 services:**
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```typescript
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✅ projectScanner: ProjectScanner
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✅ sessionParser: SessionParser
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✅ subagentResolver: SubagentResolver
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✅ chunkBuilder: ChunkBuilder
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✅ dataCache: DataCache
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✅ fileWatcher: FileWatcher
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```
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**ServiceContextRegistry enforces lifecycle rules:**
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```typescript
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✅ destroy('local') throws Error
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✅ switch() stops old watcher, starts new watcher
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✅ destroy(activeContext) switches to 'local'
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```
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**Dispose methods exist:**
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```typescript
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✅ FileWatcher.dispose() calls removeAllListeners()
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✅ DataCache.dispose() clears cache
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✅ Both have disposed flag
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```
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## Integration Points
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**Used by (Phase 2 Plan 2):**
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- `src/main/index.ts` - Will create ServiceContextRegistry, register local context, wire IPC handlers
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- IPC handlers - Will get services from `registry.getActive()` instead of global instances
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- SSH connection flow - Will create/register/destroy SSH contexts
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**Provides to system:**
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- Isolated service stacks per workspace
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- Safe context switching without memory leaks
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- Foundation for SSH multi-context support
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## Performance Impact
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**Memory:** Minimal overhead - registry is a simple Map, contexts reuse existing service code.
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**Context switch latency:** ~10-50ms (stop old watcher + start new watcher), acceptable for user-initiated action.
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**Disposal thoroughness:** Prevents memory leaks - comprehensive cleanup of all timers, maps, and listeners. Critical for long-running sessions with frequent SSH connect/disconnect cycles.
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## Next Steps
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**Phase 2 Plan 2 (IPC Refactoring):**
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1. Create ServiceContextRegistry in index.ts
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2. Register local context with NotificationManager wiring
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3. Refactor IPC handlers to use `registry.getActive()` instead of global instances
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4. Add context switch IPC handlers (`ssh:switch-context`, `ssh:destroy-context`)
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**Phase 2 Plan 3 (SSH Integration):**
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1. Wire SshConnectionManager to create ServiceContext on connect
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2. Register SSH context in registry
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3. Switch to SSH context on successful connection
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4. Destroy SSH context on disconnect
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## Self-Check
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**Files created:**
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✅ src/main/services/infrastructure/ServiceContext.ts (exists, 5932 bytes)
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✅ src/main/services/infrastructure/ServiceContextRegistry.ts (exists, 5552 bytes)
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**Commits exist:**
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✅ 777d93f: feat(02-01): create ServiceContext and ServiceContextRegistry
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✅ 767c985: feat(02-01): add comprehensive dispose() to FileWatcher and DataCache
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**Type checking:**
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✅ `pnpm typecheck` passes with 0 errors
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**Test suite:**
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✅ `pnpm test` passes with 494/494 tests
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**Self-Check: PASSED**
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