Connects Claude to your repository's structural intelligence through git analysis and import graphs. Exposes operations for querying test file mappings, blast radius for hub files, co-change patterns from commit history, and sibling module detection. The same engine that powers their CLI completeness checker (the one that catches files your agent forgot to modify) but surfaced as queryable context. Useful when you want your agent to understand which files historically change together, what depends on what, or whether touching a particular file means updating 50 other things. Rules-based detection runs locally with no API costs. Optional AI semantic layer available but not required for the MCP server itself.