claude-mem/docs/plans/phase0-task2-summary.md

Phase 0 Task 2: SDK Worker Comprehensive Logging

Summary

Added comprehensive logging to /Users/alexnewman/Scripts/claude-mem/src/sdk/worker.ts to trace the complete flow of the FINALIZE message from receipt through SDK agent processing to database storage.

Modified Files

1. /Users/alexnewman/Scripts/claude-mem/src/sdk/worker.ts - Added 20+ logging points throughout the worker lifecycle

Logging Points Added

All logs use the [claude-mem worker] prefix for easy searching and are sent to stderr using console.error().

1. Worker Initialization (Lines 70-73)

• Location: constructor()
• What: Logs when worker instance is created
• Data: sessionDbId, socketPath

2. Worker Run Started (Lines 80-83)

• Location: run() method entry
• What: Logs when main run loop begins
• Data: sessionDbId, socketPath

3. Session Loading (Lines 89-100)

• Location: run() method after loadSession()
• What: Logs session load failure or success
• Data:
  • Failure: sessionDbId
  • Success: sessionDbId, project, sdkSessionId, userPromptLength

4. Socket Server Started (Lines 107-110)

• Location: run() method after startSocketServer()
• What: Logs successful socket server initialization
• Data: socketPath, sessionDbId

5. SDK Agent Starting (Lines 113-116)

• Location: run() method before runSDKAgent()
• What: Logs SDK agent invocation
• Data: sessionDbId, model

6. SDK Agent Completed (Lines 120-123)

• Location: run() method after runSDKAgent() completes
• What: Logs completion before marking session as done
• Data: sessionDbId, sdkSessionId

7. Fatal Error Handler (Lines 129-133)

• Location: run() method catch block
• What: Logs any fatal errors with full stack trace
• Data: sessionDbId, error message, stack trace

8. Socket Connection Received (Lines 157-160)

• Location: startSocketServer() - connection handler
• What: Logs when a client connects to the Unix socket
• Data: sessionDbId, socketPath

9. Data Received on Socket (Lines 164-167)

• Location: startSocketServer() - data handler
• What: Logs when data arrives on socket
• Data: sessionDbId, chunk size

10. Message Parsed from Socket (Lines 178-182)

• Location: startSocketServer() - message parsing
• What: Logs successfully parsed JSON message
• Data: sessionDbId, messageType, rawMessage (truncated to 500 chars)

11. Invalid Message Error (Lines 185-189)

• Location: startSocketServer() - JSON parse error
• What: Logs when message fails to parse
• Data: sessionDbId, error message, rawLine (truncated to 200 chars)

12. Socket Connection Error (Lines 196-200)

• Location: startSocketServer() - socket error handler
• What: Logs socket-level errors
• Data: sessionDbId, error message, stack trace

13. Server Errors (Lines 206-216)

• Location: startSocketServer() - server error handler
• What: Logs server-level errors (EADDRINUSE, etc.)
• Data: sessionDbId, socketPath (if EADDRINUSE), error details

14. Message Handler Entry (Lines 233-237)

• Location: handleMessage() method entry
• What: Logs when processing any message
• Data: sessionDbId, messageType, pendingMessagesCount

15. FINALIZE Message Detected (Lines 242-246)

• Location: handleMessage() - finalize detection
• What: Logs when FINALIZE message is received (CRITICAL LOG)
• Data: sessionDbId, isFinalized=true, pendingMessagesCount

16. Observation Message Queued (Lines 249-254)

• Location: handleMessage() - observation handling
• What: Logs observation message details
• Data: sessionDbId, toolName, input/output lengths

17. SDK Session Initialized (Lines 292-295)

• Location: runSDKAgent() - onSystemInitMessage callback
• What: Logs when SDK session ID is received
• Data: sessionDbId, sdkSessionId

18. SDK Agent Response Received (Lines 301-306)

• Location: runSDKAgent() - onAgentMessage callback
• What: Logs every response from SDK agent (CRITICAL LOG)
• Data: sessionDbId, sdkSessionId, contentLength, contentPreview (200 chars)

19. Initial Prompt Yielded (Lines 322-327)

• Location: createMessageGenerator() - initial prompt
• What: Logs when first prompt is sent to SDK agent
• Data: sessionDbId, claudeSessionId, project, promptLength

20. FINALIZE Processing in Generator (Lines 349-352)

• Location: createMessageGenerator() - finalize handling
• What: Logs when FINALIZE is processed in async generator (CRITICAL LOG)
• Data: sessionDbId, sdkSessionId

21. Finalize Prompt Yielded (Lines 357-362)

• Location: createMessageGenerator() - after building finalize prompt
• What: Logs finalize prompt being sent to SDK agent (CRITICAL LOG)
• Data: sessionDbId, sdkSessionId, promptLength, promptPreview (300 chars)

22. Failed to Load Session for Finalize (Lines 371-373)

• Location: createMessageGenerator() - error case
• What: Logs if session reload fails during finalize
• Data: sessionDbId

23. Observation Prompt Yielded (Lines 385-389)

• Location: createMessageGenerator() - observation handling
• What: Logs when observation prompt is sent to SDK agent
• Data: sessionDbId, toolName, promptLength

24. Parsing Agent Message (Lines 406-410)

• Location: handleAgentMessage() method entry
• What: Logs when starting to parse agent response
• Data: sessionDbId, sdkSessionId, contentLength

25. Observations Parsed (Lines 414-418)

• Location: handleAgentMessage() - after parseObservations()
• What: Logs how many observations were found
• Data: sessionDbId, sdkSessionId, observationCount

26. Storing Observation (Lines 422-428)

• Location: handleAgentMessage() - in observation loop
• What: Logs each observation being stored
• Data: sessionDbId, sdkSessionId, project, observationType, observationTextLength

27. Cannot Store Observation (Lines 431-434)

• Location: handleAgentMessage() - error case
• What: Logs when SDK session ID is missing
• Data: sessionDbId, observationType

28. Attempting to Parse Summary (Lines 439-442)

• Location: handleAgentMessage() - before parseSummary()
• What: Logs when attempting summary parse (CRITICAL LOG)
• Data: sessionDbId, sdkSessionId

29. Summary Parsed Successfully (Lines 446-456)

• Location: handleAgentMessage() - after parseSummary() success
• What: Logs summary structure details (CRITICAL LOG)
• Data: sessionDbId, sdkSessionId, project, hasRequest, hasInvestigated, hasLearned, hasCompleted, filesReadCount, filesEditedCount

30. Storing Summary in Database (Lines 470-474)

• Location: handleAgentMessage() - before storeSummary()
• What: Logs summary about to be stored (CRITICAL LOG)
• Data: sessionDbId, sdkSessionId, project

31. Summary Stored Successfully (Lines 478-482)

• Location: handleAgentMessage() - after storeSummary()
• What: Logs successful database storage (CRITICAL LOG)
• Data: sessionDbId, sdkSessionId, project

32. Summary Parsed but No SDK Session (Lines 484-486)

• Location: handleAgentMessage() - error case
• What: Logs when summary found but can't store
• Data: sessionDbId

33. No Summary Found (Lines 488-491)

• Location: handleAgentMessage() - no summary case
• What: Logs when response has no summary
• Data: sessionDbId, sdkSessionId

34. Cleanup Started (Lines 499-504)

• Location: cleanup() method entry
• What: Logs cleanup process beginning
• Data: sessionDbId, socketPath, hasServer, socketExists

35. Cleanup Complete (Lines 513-515)

• Location: cleanup() method exit
• What: Logs cleanup finished
• Data: sessionDbId

How to Test

1. Start the Worker

# Start a worker for session ID 1 (for example)
bun run src/sdk/worker.ts 1

Look for logs:

• [claude-mem worker] Worker instance created
• [claude-mem worker] Worker run() started
• [claude-mem worker] Session loaded successfully
• [claude-mem worker] Socket server started successfully
• [claude-mem worker] Starting SDK agent

2. Send Messages via Socket

# From another terminal, send a message to the socket
# Socket path format: /tmp/claude-mem-worker-{sessionDbId}.sock

# Send an observation
echo '{"type":"observation","tool_name":"Read","tool_input":"...","tool_output":"..."}' | nc -U /tmp/claude-mem-worker-1.sock

# Send finalize
echo '{"type":"finalize"}' | nc -U /tmp/claude-mem-worker-1.sock

3. Monitor Logs

Use grep to filter for specific events:

# All worker logs
bun run src/sdk/worker.ts 1 2>&1 | grep '\[claude-mem worker\]'

# Only FINALIZE-related logs
bun run src/sdk/worker.ts 1 2>&1 | grep -i finalize

# Only summary-related logs
bun run src/sdk/worker.ts 1 2>&1 | grep -i summary

# Only database storage logs
bun run src/sdk/worker.ts 1 2>&1 | grep -i storing

What to Look for When FINALIZE is Sent

The expected log sequence when a FINALIZE message is sent:

1. Message Receipt:

   [claude-mem worker] Data received on socket
   [claude-mem worker] Message received from socket { messageType: 'finalize', ... }
   

2. Message Handling:

   [claude-mem worker] Processing message in handleMessage() { messageType: 'finalize', ... }
   [claude-mem worker] FINALIZE message detected { isFinalized: true, ... }
   

3. Generator Processing:

   [claude-mem worker] Processing FINALIZE message in generator
   [claude-mem worker] Yielding finalize prompt to SDK agent { promptLength: ..., promptPreview: ... }
   

4. SDK Agent Response:

   [claude-mem worker] SDK agent response received { contentLength: ..., contentPreview: ... }
   

5. Parsing and Storage:

   [claude-mem worker] Parsing agent message for observations and summary
   [claude-mem worker] Observations parsed from response { observationCount: ... }
   [claude-mem worker] Attempting to parse summary from response
   [claude-mem worker] Summary parsed successfully { hasRequest: true, hasLearned: true, ... }
   [claude-mem worker] Storing summary in database
   [claude-mem worker] Summary stored successfully in database
   

6. Completion:

   [claude-mem worker] SDK agent completed, marking session as completed
   [claude-mem worker] Cleaning up worker resources
   [claude-mem worker] Cleanup complete
   

Issues and Concerns

1. Large Response Truncation

• Raw messages are truncated to 500 chars in socket logs
• Content previews are limited to 200-300 chars
• This prevents log spam but might make debugging harder if the critical info is beyond the truncation point

2. Async Generator Timing

• The generator waits in a loop (while (!this.isFinalized)) with 100ms sleeps
• Logs show when messages are queued but not when the generator processes them
• There could be a small delay between "FINALIZE message detected" and "Processing FINALIZE in generator"

3. Error Cases Not Fully Logged

• Parser errors in parseObservations() and parseSummary() are not logged
• Should consider adding try-catch in handleAgentMessage() to catch parser exceptions
• XML parsing errors would be silent

4. No Timing Information

• Logs don't include timestamps (relies on stderr default timestamps)
• Could add Date.now() or elapsed time to measure performance bottlenecks

5. Socket Path Permissions

• No logging for socket file permissions or creation errors
• If socket can't be created due to permissions, error might not be clear

6. Multi-Message Batching

• If multiple messages arrive rapidly, they're processed in a batch
• Logs show individual messages but don't indicate batch boundaries
• Could add batch ID or sequence numbers

Recommendations for Next Steps

1. Test the logging by running the worker and sending various messages
2. Add parser error handling in handleAgentMessage() to catch XML parse failures
3. Consider adding timing metrics to measure latency at each stage
4. Validate socket connectivity early in startup (try writing a test message)
5. Add structured logging library if JSON logs would be easier to parse programmatically

Related Files

• /Users/alexnewman/Scripts/claude-mem/src/sdk/prompts.ts - Prompt builders used in logged operations
• /Users/alexnewman/Scripts/claude-mem/src/sdk/parser.ts - XML parsers for observations and summaries
• /Users/alexnewman/Scripts/claude-mem/src/services/sqlite/HooksDatabase.js - Database methods being called
• /Users/alexnewman/Scripts/claude-mem/src/shared/paths.js - Socket path generation