Comprehensive documentation of:
- Create Library 500 error bug and fix
- Root cause analysis (type mismatch in context extraction)
- Testing issues discovered (poor error reporting, mock vs real tests)
- Test improvements implemented
- Tomorrow's 5-phase action plan for API reliability
- Complete endpoint checklist for testing
- Correct vs incorrect code patterns
- Success criteria for "rock solid" API
Reference document for tomorrow's comprehensive API review session.
