Code Graph Mcp

code-graph-mcp

A high-performance code knowledge graph server implementing the [Model Context Protocol (MCP)](https://modelcontextprotocol.io/). Indexes codebases into a structured AST knowledge graph with semantic search, call graph traversal, and HTTP route tracing — designed to give AI coding assistants deep, structured understanding of your code.

Features

• Multi-language parsing — Tree-sitter AST extraction across tiers of depth:
  • Full (calls + imports + inheritance): TypeScript/TSX, JavaScript, Go, Python, Rust, Java. HTTP route extraction additionally covers TypeScript/TSX + JavaScript (Express/Connect), Go (net/http), Python (Flask/FastAPI), and Rust axum (.route() chains with inline .nest() prefixes; named handlers only) — actix/rocket and Java Spring are not yet route-extracted
  • Smoke-tested (calls + imports + inheritance): C#, Kotlin, Ruby, PHP, Swift, Dart
  • Limited (functions + calls + #include imports + gtest test markers + C++ base-class inheritance + Class::method scope qualification): C, C++
  • Scripting: Bash (functions + commands + source/. imports), Markdown (headings)
  • File-FTS only (no AST symbol extraction): HTML, CSS, JSON
  • Test markers — detected from the AST for Rust (#[test] / #[cfg(test)]), JavaScript/TypeScript/TSX (describe/it/test blocks and their callbacks) and C/C++ (gtest TEST macros). Go, Python, Java and the rest fall back to path/name heuristics (tests/, src/test/java/, *_test.*, *.test.js, test_*, *Test)
  • Value/type references — a references relation for symbols that are used without being called, imported or inherited (path-qualified constants, type-position uses, functions passed as values): Rust, TypeScript/TSX, JavaScript, Python, Go, Java, C, C++
• Semantic code search — Hybrid BM25 full-text + vector semantic search with Reciprocal Rank Fusion (RRF), powered by sqlite-vec
• Call graph traversal — Recursive CTE queries