ai-assistant-discord-bot/MED-002_IMPLEMENTATION.md

MED-002: Logging and Error Reporting Implementation

Status: ✅ COMPLETE
Date: 2026-02-13
Priority: Medium
Effort: Medium (MED-002)

Summary

Implemented comprehensive structured logging with JSON formatting, log rotation, error tracking with unique IDs, and user-friendly Discord error messages. All 156 tests pass (15 new tests added).

Changes Made

1. New File: claude_coordinator/logging_config.py (371 lines)

Features:

• JSONFormatter: Structured JSON log output with timestamp, level, module, function, line, message, exception, and custom fields
• ErrorTracker: Unique error ID generation and tracking
• setup_logging(): Application-wide logging configuration with rotation
• get_log_directory(): Smart log directory detection (production vs fallback)
• format_error_for_discord(): User-friendly error messages without internal details
• log_and_format_error(): Combined logging and message formatting

Error Types Supported:

• timeout: Claude request timeout
• claude_error: Claude CLI failure
• parse_error: Malformed JSON response
• config_error: Configuration issues
• permission_error: Permission denied
• session_error: Session management failure
• lock_error: Lock acquisition failure

2. Updated: claude_coordinator/bot.py

Enhancements:

• Imported and integrated logging_config module
• Enhanced main() to use setup_logging() with rotation
• Added structured logging throughout message handling
• Integrated error tracking with unique error IDs
• Enhanced error messages with log_and_format_error()
• Added performance metrics (request duration, Claude duration, session operations)
• Added context to all log calls (channel_id, session_id, cost, duration, etc.)

Key Events Logged:

• Bot lifecycle (startup, ready, shutdown)
• Message processing (received, matched, session state)
• Claude operations (command, subprocess, response)
• Error handling (with error IDs and context)
• Performance metrics (durations, costs, chunk counts)

3. New File: tests/test_logging.py (316 lines)

Test Coverage (15 tests):

• JSON formatter produces valid JSON
• Required fields in all log entries
• Exception info inclusion
• Extra fields support
• Error ID generation and uniqueness
• Error tracking with context
• Log directory creation
• Handler configuration
• Discord error message formatting
• Privacy protection (no internal details exposed)
• Combined logging and formatting

All tests pass: ✅ 156 passed (141 existing + 15 new)

4. Updated: tests/test_bot.py

Fixed test_handles_claude_failure to expect new error message format with error ID instead of internal error details.

5. New File: docs/LOGGING.md

Comprehensive documentation including:

• Architecture overview
• Component descriptions
• Usage examples
• Log analysis with jq
• Environment variables
• Privacy and security guidelines
• Monitoring recommendations
• Troubleshooting guide

6. New File: test_logging_manual.py

Manual test script for interactive validation of:

• Basic logging setup
• JSON format validation
• Error tracking
• Discord message formatting
• Log rotation

Log File Configuration

Locations

1. Production: /var/log/claude-coordinator/bot.log (if writable)
2. Fallback: ~/.claude-coordinator/logs/bot.log

Rotation Settings

• Max file size: 10MB
• Backup count: 5 rotated files
• Total retention: ~50MB (5 × 10MB)
• Encoding: UTF-8

Log Format

File (JSON):

{
    "timestamp": "2026-02-13T19:06:35.545176+00:00",
    "level": "INFO",
    "module": "bot",
    "function": "_handle_claude_request",
    "line": 273,
    "message": "Processing message in channel 12345 for project test-project",
    "channel_id": "12345",
    "project": "test-project",
    "message_length": 150
}

Console (Plain Text):

2026-02-13 19:06:35,545 - claude_coordinator.bot - INFO - Processing message in channel 12345 for project test-project

Discord Error Messages

Before (exposed internal details):

❌ Error running Claude:

Command failed: invalid syntax

After (user-friendly with error ID):

❌ **Claude Error**
Something went wrong processing your request.
Please try again or rephrase your message.

_Error ID: `abc12345`_
_Please reference this ID if requesting support._

Testing Results

$ pytest tests/test_logging.py -v
============================= test session starts ==============================
collected 15 items

tests/test_logging.py::TestJSONFormatter::test_json_formatter_produces_valid_json PASSED
tests/test_logging.py::TestJSONFormatter::test_json_formatter_includes_required_fields PASSED
tests/test_logging.py::TestJSONFormatter::test_json_formatter_includes_exception_info PASSED
tests/test_logging.py::TestJSONFormatter::test_json_formatter_includes_extra_fields PASSED
tests/test_logging.py::TestErrorTracker::test_generate_error_id_returns_string PASSED
tests/test_logging.py::TestErrorTracker::test_generate_error_id_is_unique PASSED
tests/test_logging.py::TestErrorTracker::test_log_error_with_id_includes_error_id PASSED
tests/test_logging.py::TestSetupLogging::test_setup_logging_creates_log_directory PASSED
tests/test_logging.py::TestSetupLogging::test_setup_logging_configures_handlers PASSED
tests/test_logging.py::TestFormatErrorForDiscord::test_format_error_includes_error_id PASSED
tests/test_logging.py::TestFormatErrorForDiscord::test_format_error_handles_known_types PASSED
tests/test_logging.py::TestFormatErrorForDiscord::test_format_error_handles_unknown_types PASSED
tests/test_logging.py::TestFormatErrorForDiscord::test_format_error_does_not_expose_internal_details PASSED
tests/test_logging.py::TestLogAndFormatError::test_log_and_format_error_returns_tuple PASSED
tests/test_logging.py::TestLogAndFormatError::test_log_and_format_error_logs_with_context PASSED

============================== 15 passed in 0.12s

$ pytest -v -m 'not integration'
============================== 156 passed, 1 deselected, 2 warnings in 48.49s ==============================

Environment Variables

• LOG_LEVEL: Set logging level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
  • Default: INFO
  • Development: DEBUG
  • Production: INFO

Usage Examples

Basic Logging

logger.info(
    "Processing message",
    extra={
        'channel_id': '12345',
        'session_id': 'abc-def',
        'cost_usd': 0.05
    }
)

Error Handling

try:
    result = await operation()
except Exception as e:
    error_id, discord_msg = log_and_format_error(
        logger,
        error_type="claude_error",
        message="Operation failed",
        error=e,
        channel_id=channel_id
    )
    await channel.send(discord_msg)

Performance Tracking

start_time = time.time()
response = await claude_runner.run(...)
duration_ms = int((time.time() - start_time) * 1000)

logger.info(
    "Claude CLI completed",
    extra={
        'duration_ms': duration_ms,
        'cost_usd': response.cost,
        'session_id': response.session_id
    }
)

Log Analysis

# View real-time logs
tail -f ~/.claude-coordinator/logs/bot.log | jq .

# Find all errors
cat bot.log | jq 'select(.level == "ERROR")'

# Find specific error by ID
cat bot.log* | jq 'select(.error_id == "abc12345")'

# Calculate average Claude CLI duration
cat bot.log | jq 'select(.claude_duration_ms) | .claude_duration_ms' | awk '{sum+=$1; count++} END {print sum/count}'

# Track costs
cat bot.log | jq 'select(.cost_usd) | .cost_usd' | awk '{sum+=$1} END {print "Total: $" sum}'

Privacy Protection

Logged (Safe)

✅ Channel IDs
✅ Session IDs (UUIDs)
✅ Timestamps, durations, costs
✅ Error messages and stack traces
✅ Message lengths (not content)

Never Logged

❌ User message content
❌ Discord tokens
❌ Authentication credentials
❌ Personal identifiable information

Exposed in Discord

✅ Error type and description
✅ Error ID for support
✅ Actionable suggestions

Never Exposed in Discord

❌ Stack traces
❌ File paths
❌ Internal error details
❌ Session IDs
❌ Database information

Monitoring Recommendations

Real-time Monitoring:

# Follow all logs
tail -f ~/.claude-coordinator/logs/bot.log | jq .

# Follow errors only
tail -f ~/.claude-coordinator/logs/bot.log | jq 'select(.level == "ERROR")'

Alerting Criteria:

• High error rate (>5 errors/minute)
• Repeated timeouts (same channel)
• Session save failures
• Database errors
• Cost spikes (>$1/hour)

Deployment Notes

1. Log directory created automatically on first run
2. No manual rotation needed - handled by RotatingFileHandler
3. Environment variable LOG_LEVEL controls verbosity
4. Backwards compatible - no breaking changes to existing functionality

Validation

✅ All 156 tests pass
✅ JSON logs parse correctly
✅ Error IDs are unique
✅ Discord messages are user-friendly
✅ Internal details not exposed
✅ Log rotation works correctly
✅ Performance metrics captured
✅ Privacy protection validated

Benefits

1. Debugging: Structured logs with full context make troubleshooting easier
2. Monitoring: JSON format enables automated log analysis and alerting
3. Support: Error IDs allow users to reference specific issues
4. Privacy: Internal details kept out of Discord messages
5. Performance: Duration and cost tracking for optimization
6. Scalability: Log rotation prevents disk space issues
7. Observability: Comprehensive visibility into bot operations

Next Steps

MED-002 is complete and ready for production deployment.

Recommended follow-ups:

• Monitor logs in production for 1-2 weeks
• Set up automated alerting for critical errors
• Create log analysis dashboard
• Implement external log aggregation (Loki, CloudWatch)
• Add cost tracking alerts

---

Files Changed:

• ✅ claude_coordinator/logging_config.py (new, 371 lines)
• ✅ claude_coordinator/bot.py (enhanced logging)
• ✅ tests/test_logging.py (new, 316 lines, 15 tests)
• ✅ tests/test_bot.py (1 test updated)
• ✅ docs/LOGGING.md (new, comprehensive docs)
• ✅ test_logging_manual.py (new, manual validation)

Test Results: 156/156 passed (15 new tests added)
Status: ✅ Ready for deployment