# Structured JSON Logging - ā
COMPLETE
**Implementation Status:** MERGED TO MAIN
**PR:** #53 - https://github.com/adamkwhite/claude-memory-mcp/pull/53
**Last Updated:** 2025-10-04
## Implementation Summary
Successfully implemented structured JSON logging with full backward compatibility:
### ā
Task Completion
- [x] **1.0** Implement JSONFormatter class and environment variable configuration
- [x] **2.0** Update specialized logging functions with structured context
- [x] **3.0** Create comprehensive test suite for JSON logging
- [x] **4.0** Update documentation with JSON format examples
- [x] **5.0** Performance validation and backward compatibility verification
### š Test Results
- **432 tests passing** (17 new tests added)
- **Coverage: 77%** (improved from 76%)
- **logging_config.py: 95%** coverage (improved from 85%)
### š Files Changed
**Core Implementation:**
- `src/logging_config.py` - JSONFormatter class, environment variable handling
- `tests/test_json_logging.py` - 17 new comprehensive test cases
- `tests/test_logging.py` - Updated for compatibility
**Documentation:**
- `README.md` - Added CLAUDE_MCP_LOG_FORMAT documentation
- `docs/json-logging.md` - Comprehensive guide (800+ lines)
### šÆ Key Features
1. **JSONFormatter class** - Newline-delimited JSON (NDJSON) output
2. **Environment variable** - `CLAUDE_MCP_LOG_FORMAT` (json|text, default: text)
3. **Structured context** - All specialized logging functions include rich metadata
4. **Security preserved** - Sanitization and path redaction work in JSON mode
5. **Backward compatible** - Default text format, zero breaking changes
## Completion Summary
ā
**PR #53 merged to main** - All quality gates passed
ā
**Issue #52 closed** - Feature fully implemented
ā
**Documentation complete** - Comprehensive guide published
ā
**Production ready** - Zero breaking changes, full backward compatibility
## Resources
- **PRD**: `docs/features/json-logging-COMPLETED/prd.md`
- **Tasks**: `docs/features/json-logging-COMPLETED/tasks.md`
- **Documentation**: `docs/json-logging.md`
- **GitHub Issue**: #52 - https://github.com/adamkwhite/claude-memory-mcp/issues/52 (CLOSED)
- **Pull Request**: #53 - https://github.com/adamkwhite/claude-memory-mcp/pull/53 (MERGED)
- **Related Issues**: #16 (correlation IDs), #15 (log sampling)