# Phase 25 Summary — Graph MCP + Quality Gate

## Outcome
Phase 25 is complete. Graph traversal is exposed through MCP and quality gates are verified.

## Delivered
- `corpus_graph` MCP tool is available and tested.
- Graph traversal reuses existing `GraphStore` storage and schema.
- Zero-hallucination line-range integration tests are in place and passing.
- Branch coverage target (>=85%) is met for chunking modules.

## Verification
- `uv run pytest tests/mcp/test_server.py -k "corpus_graph" -q` → pass
- `uv run pytest tests/ingest/test_hallucination.py -q` → pass
- `uv run pytest --cov=corpus_analyzer.ingest.chunker --cov-branch --cov-report=term-missing tests/ingest/test_chunker.py tests/ingest/test_chunker_coverage.py -q` → chunker.py 94%
- `uv run pytest --cov=corpus_analyzer.ingest.ts_chunker --cov-branch --cov-report=term-missing tests/ingest/test_chunker.py tests/ingest/test_hallucination.py -q` → ts_chunker.py 87%

## Requirement Coverage
- GRAPH-01: satisfied
- QUAL-01: satisfied
- QUAL-02: satisfied
