# SimpleClaudeRunner Logging Integration Summary

## Overview
Successfully integrated the ProjectLogger system into SimpleClaudeRunner to enable comprehensive session logging, matching the functionality of the archived orchestrators.

## Changes Made

### 1. Core Imports and Initialization
- Added imports for `ProjectLogger` and `get_project_logger` from `claude_mpm.core.logger`
- Added necessary imports: `json`, `time`, `datetime` for logging functionality

### 2. Constructor Updates
- Added `self.log_level` to track the logging level
- Initialize `self.project_logger` when logging is enabled (not "OFF")
- Create session log file (`system.jsonl`) in the session directory
- Log initial session start event with runner details

### 3. Agent Deployment Logging
- Log agent deployment start
- Log deployment results (deployed/updated counts)
- Log deployment errors if they occur

### 4. Interactive Mode Logging
- Log interactive session start
- Log Claude launch attempt
- Log launch failures and fallback attempts
- Log session completion (when using subprocess fallback)

### 5. Non-Interactive Mode Logging
- Log session start with prompt preview
- Log subprocess execution
- Log successful completion with execution time
- Detect and log potential agent delegations
- Log session failures with error details
- Log exceptions with type information
- Always log session summary in finally block

### 6. Helper Methods
- `_contains_delegation()`: Detects delegation patterns in Claude's response
- `_log_session_event()`: Writes structured events to session log file

## Log Structure

### Directory Layout
```
.claude-mpm/logs/
├── sessions/
│   └── 20250725_231612/
│       └── system.jsonl      # Session event log
├── system/
│   └── 20250725.jsonl        # Daily system log
└── agents/
    └── [agent_name]/
        └── 20250725.jsonl    # Agent invocation logs
```

### Event Types Logged
- `session_start`: Runner initialization
- `launching_claude_interactive`: Interactive mode launch
- `interactive_launch_failed`: Launch errors
- `interactive_session_complete`: Session completion
- `interactive_fallback_failed`: Fallback errors
- `session_complete`: Successful completion
- `session_failed`: Command failures
- `session_exception`: Unexpected errors
- `delegation_detected`: Potential agent delegations

### System Log Entries
- Component-based logging (runner, deployment, session, delegation)
- Severity levels (INFO, ERROR, DEBUG)
- Detailed messages with context

## Backward Compatibility
- Logging is optional (controlled by `log_level` parameter)
- No changes to existing API or behavior
- Graceful error handling prevents logging failures from affecting main execution

## Testing
Created comprehensive test script (`scripts/test_simple_runner_logging.py`) that verifies:
- Logging initialization
- Session directory creation
- Event logging in different scenarios
- Error logging
- Logging can be disabled

## Benefits
1. **Session Tracking**: Each run creates a timestamped session directory
2. **Event Tracing**: Detailed event log for debugging and analysis
3. **Error Visibility**: All errors are logged with context
4. **Performance Metrics**: Execution times are tracked
5. **Delegation Detection**: Identifies when agents might be invoked
6. **Structured Logs**: JSON format for easy parsing and analysis

## Future Enhancements
While not implemented in this iteration:
- Full agent invocation logging (would require intercepting Task tool calls)
- Token usage tracking
- Response caching
- Detailed delegation parsing

The current implementation provides a solid foundation for session logging that matches the essential functionality of the archived orchestrators while maintaining the simplicity of SimpleClaudeRunner.