# Phase 3 Files Manifest

## Implementation Files

### Core Components (4 files, ~1,000 lines)

1. **database_manager.py** (265 lines)
   - Path: `src/tracertm/mcp/database_manager.py`
   - Purpose: Async connection pooling with query instrumentation
   - Key Classes: `DatabaseManager`, `QueryMetrics`
   - Features: Pool management, health checks, slow query logging

2. **cache.py** (275 lines)
   - Path: `src/tracertm/mcp/cache.py`
   - Purpose: TTL-based query caching with LRU eviction
   - Key Classes: `QueryCache`, `CacheEntry`
   - Features: Cache invalidation, statistics, get-or-compute pattern

3. **query_optimizer.py** (240 lines)
   - Path: `src/tracertm/mcp/query_optimizer.py`
   - Purpose: Eager loading patterns to eliminate N+1 queries
   - Key Classes: `QueryOptimizer`
   - Features: Items with links, batch loading, graph queries

4. **tools/base_async.py** (215 lines)
   - Path: `src/tracertm/mcp/tools/base_async.py`
   - Purpose: Async utilities for MCP tools
   - Key Functions: `get_async_session`, `cached_query`, `invalidate_cache`
   - Features: Session management, cache helpers, response wrappers

### Examples & Tools (2 files, ~730 lines)

5. **tools/items_phase3.py** (340 lines)
   - Path: `src/tracertm/mcp/tools/items_phase3.py`
   - Purpose: Reference implementation showing all optimizations
   - Key Tools: `create_item_phase3`, `get_item_phase3`, `query_items_phase3`, `get_db_metrics_phase3`
   - Features: Demonstrates pooling, caching, eager loading

6. **db_benchmark.py** (390 lines)
   - Path: `src/tracertm/mcp/db_benchmark.py`
   - Purpose: Performance benchmarking suite
   - Key Classes: `BenchmarkRunner`
   - Features: Compares old vs new, measures improvements

## Documentation (4 files, ~1,500 lines)

7. **PHASE_3_DATABASE_OPTIMIZATION.md** (~500 lines)
   - Path: `src/tracertm/mcp/PHASE_3_DATABASE_OPTIMIZATION.md`
   - Purpose: Complete implementation guide
   - Sections: Components, performance, migration, best practices
   - Audience: All developers

8. **PHASE_3_COMPLETION_SUMMARY.md** (~450 lines)
   - Path: `src/tracertm/mcp/PHASE_3_COMPLETION_SUMMARY.md`
   - Purpose: Status report and metrics
   - Sections: Deliverables, implementation details, success metrics
   - Audience: Project managers, architects

9. **PHASE_3_QUICK_REFERENCE.md** (~280 lines)
   - Path: `src/tracertm/mcp/PHASE_3_QUICK_REFERENCE.md`
   - Purpose: Quick copy-paste patterns
   - Sections: Common patterns, troubleshooting, quick examples
   - Audience: Developers implementing tools

10. **PHASE_3_INDEX.md** (~270 lines)
    - Path: `src/tracertm/mcp/PHASE_3_INDEX.md`
    - Purpose: Navigation hub for all Phase 3 docs
    - Sections: Quick start, component overview, learning path
    - Audience: Everyone

11. **PHASE_3_FILES_MANIFEST.md** (This file)
    - Path: `src/tracertm/mcp/PHASE_3_FILES_MANIFEST.md`
    - Purpose: Complete file listing
    - Audience: Reviewers, auditors

## Tests (2 files, ~330 lines)

12. **tests/unit/mcp/test_database_manager.py** (~150 lines)
    - Path: `tests/unit/mcp/test_database_manager.py`
    - Purpose: DatabaseManager unit tests
    - Coverage: Initialization, sessions, pool status, metrics

13. **tests/unit/mcp/test_cache.py** (~180 lines)
    - Path: `tests/unit/mcp/test_cache.py`
    - Purpose: QueryCache unit tests
    - Coverage: Cache operations, TTL, LRU, invalidation

## Summary Statistics

**Total Files**: 13
**Total Lines**: ~3,560

**Breakdown**:
- Core Implementation: 4 files, ~1,000 lines
- Examples & Tools: 2 files, ~730 lines
- Documentation: 5 files, ~1,500 lines
- Tests: 2 files, ~330 lines

**Languages**:
- Python: 8 files (implementation + tests)
- Markdown: 5 files (documentation)

## File Dependencies

```
database_manager.py
└── (no internal deps)

cache.py
└── (no internal deps)

query_optimizer.py
├── tracertm.models.item
├── tracertm.models.link
└── tracertm.models.project

tools/base_async.py
├── tracertm.config.manager
├── tracertm.mcp.cache
└── tracertm.mcp.database_manager

tools/items_phase3.py
├── tracertm.mcp.core
├── tracertm.mcp.query_optimizer
├── tracertm.mcp.tools.base_async
└── tracertm.models.item

db_benchmark.py
├── tracertm.database.connection
├── tracertm.mcp.database_manager
├── tracertm.mcp.query_optimizer
├── tracertm.models.item
└── tracertm.models.link
```

## Installation & Usage

### No additional dependencies required
All external dependencies are already in `pyproject.toml`:
- `sqlalchemy[asyncio]>=2.0.46`
- `aiosqlite>=0.22.1`
- `asyncpg>=0.31.0`

### Quick Start
```python
# Import optimized utilities
from tracertm.mcp.tools.base_async import (
    get_async_session,
    cached_query,
    invalidate_cache
)

# Use in tools
async with get_async_session() as session:
    result = await session.execute(query)
```

### Run Benchmark
```bash
python -m tracertm.mcp.db_benchmark <db_url> <project_id>
```

### Run Tests
```bash
pytest tests/unit/mcp/test_database_manager.py -v
pytest tests/unit/mcp/test_cache.py -v
```

## Documentation Links

- **Start Here**: [PHASE_3_INDEX.md](PHASE_3_INDEX.md)
- **Quick Reference**: [PHASE_3_QUICK_REFERENCE.md](PHASE_3_QUICK_REFERENCE.md)
- **Full Guide**: [PHASE_3_DATABASE_OPTIMIZATION.md](PHASE_3_DATABASE_OPTIMIZATION.md)
- **Status Report**: [PHASE_3_COMPLETION_SUMMARY.md](PHASE_3_COMPLETION_SUMMARY.md)

## Version History

- **v1.0** (2026-01-30): Initial Phase 3 implementation
  - Connection pooling
  - Query caching
  - Eager loading
  - Complete documentation
  - Test coverage

