claude-mem/PHASE1-COMPLETE.md

Phase 1 Implementation - Complete ✅

Phase 1 of the REFACTOR-PLAN.md has been successfully implemented and tested.

What Was Implemented

1. Database Schema (Migration 004)

Created four new tables to support the SDK agent architecture:

• sdk_sessions - Tracks SDK streaming sessions
• observation_queue - Message queue for pending observations
• observations - Stores extracted observations from SDK
• session_summaries - Stores structured session summaries

All tables include proper indexes for performance and foreign key constraints for data integrity.

2. Shared Database Layer

Created HooksDatabase class (src/services/sqlite/HooksDatabase.ts) that provides:

• Simple, synchronous database operations for hooks
• No complex logic - just basic CRUD operations
• Optimized SQLite settings (WAL mode, foreign keys enabled)
• Methods for all hook operations:
  • getRecentSummaries() - Retrieve session context
  • createSDKSession() - Initialize new session
  • queueObservation() - Add observation to queue
  • storeObservation() - Save SDK observations
  • storeSummary() - Save session summaries
  • And more...

3. Hook Functions

Implemented all four hook functions in src/hooks/:

context.ts - SessionStart Hook

• Shows user recent session context on startup
• Formats summaries in markdown for Claude
• Exits silently if no context or errors occur

save.ts - PostToolUse Hook

• Queues tool observations for SDK processing
• Skips low-value tools (TodoWrite, ListMcpResourcesTool)
• Non-blocking - returns immediately

new.ts - UserPromptSubmit Hook

• Initializes SDK session in database
• Prepares for SDK worker spawn (TODO in Phase 2)
• Non-blocking - returns immediately

summary.ts - Stop Hook

• Queues FINALIZE message for SDK
• Signals SDK to generate session summary
• Non-blocking - returns immediately

4. CLI Integration

Added four new commands to src/bin/cli.ts:

claude-mem context   # SessionStart hook
claude-mem new       # UserPromptSubmit hook
claude-mem save      # PostToolUse hook
claude-mem summary   # Stop hook

All commands read JSON input from stdin and execute the corresponding hook function.

5. Testing

Created comprehensive test suite (test-phase1.ts) that validates:

• ✅ Database schema migration 004 applied correctly
• ✅ All four tables exist
• ✅ SDK session creation and retrieval
• ✅ Observation queue operations
• ✅ Observation and summary storage
• ✅ Session status transitions

All tests pass! 🎉

What's Left for Phase 2

The foundation is complete. Next steps:

1. SDK Worker Process - Implement the background agent that:

   • Polls observation queue
   • Sends observations to Claude SDK
   • Parses XML responses (<observation> and <summary> blocks)
   • Stores results in database

2. SDK Prompts - Implement the three prompt builders:

   • buildInitPrompt() - Initialize SDK agent
   • buildObservationPrompt() - Send tool observation
   • buildFinalizePrompt() - Request session summary

3. Process Management - Update src/hooks/new.ts to spawn SDK worker as detached process

4. End-to-End Testing - Test with real Claude Code session

File Changes

New Files

• src/services/sqlite/HooksDatabase.ts - Shared database layer
• src/hooks/context.ts - SessionStart hook
• src/hooks/save.ts - PostToolUse hook
• src/hooks/new.ts - UserPromptSubmit hook
• src/hooks/summary.ts - Stop hook
• src/hooks/index.ts - Exports
• test-phase1.ts - Test suite

Modified Files

• src/services/sqlite/migrations.ts - Added migration 004
• src/services/sqlite/index.ts - Exported HooksDatabase
• src/bin/cli.ts - Added hook commands

Verification

To verify Phase 1 implementation:

# Build
bun run build

# Run tests
bun test-phase1.ts

# Check hook commands exist
./dist/claude-mem.min.js --help | grep -A 1 'context\|new\|save\|summary'

All should pass without errors.

Next Steps

Ready to proceed to Phase 2: SDK Worker Implementation

The architecture is sound, the database layer is working, and all hook functions are ready to integrate with the SDK worker process.