CodeGraph CLI MCP Server

# Supported languages This document describes which languages CodeGraph can index today, and what “support” means (AST extraction vs analyzer enrichment). ## What counts as “supported” CodeGraph’s indexing pipeline has multiple layers: 1. **AST extraction** (Tree-sitter): parses files and emits initial nodes/edges. 2. **FastML** enhancement: fast heuristics that can improve recall. 3. **Analyzers** (optional but enabled by default): build context, module linking, LSP enrichment, docs/contracts, architecture, dataflow (Rust-local). So a language can be: - **AST-supported**: Tree-sitter parsing + baseline node extraction works. - **Analyzer-supported**: additional enrichers run (module linker, LSP, etc.). ## AST-supported languages (Tree-sitter) These languages are registered in `crates/codegraph-parser/src/language.rs`: | Language | File extensions | |---|---| | Rust | `rs` | | TypeScript | `ts`, `tsx` | | JavaScript | `js`, `jsx` | | Python | `py`, `pyi` | | Go | `go` | | Java | `java` | | C/C++ | `c`, `h`, `cc`, `cpp`, `cxx`, `hpp`, `hxx` | | Swift | `swift` | | C# | `cs` | | Ruby | `rb`, `rake`, `gemspec` | | PHP | `php`, `phtml`, `php3`, `php4`, `php5` | ## Analyzer support by language ### LSP-backed enrichment CodeGraph can optionally enrich nodes/edges using Language Server Protocol tooling. The LSP server selection is defined in `crates/codegraph-mcp/src/analyzers/mod.rs`. | Language | LSP tool | Notes | |---|---|---| | Rust | `rust-analyzer` | Adds qualified names and resolves references | | TypeScript | `typescript-language-server` (+ `node`) | Requires Node + TS LS | | JavaScript | `typescript-language-server` (+ `node`) | Same server as TS | | Python | `pyright-langserver` (+ `node`) | Requires Node + Pyright LS | | Go | `gopls` | | | Java | `jdtls` | | | C/C++ | `clangd` | | You can disable analyzers entirely (or tool requirements) via: - `CODEGRAPH_ANALYZERS=false` - `CODEGRAPH_ANALYZERS_REQUIRE_TOOLS=false` ### Module linking Module/import linking currently targets: - TypeScript - JavaScript - Python - Go ### Rust-specific analyzers Some analyzers are Rust-only today: - Build context (Cargo workspace graph + feature edges) - Rustdoc/API surface enrichment - Local dataflow enrichment ## Kotlin and Dart status CodeGraph’s core language enum includes Kotlin and Dart, and file-extension detection exists in parts of the pipeline, but Tree-sitter parsing for these languages is currently disabled due to Tree-sitter version conflicts: - `tree-sitter-kotlin` and `tree-sitter-dart` are not enabled in `crates/codegraph-parser/Cargo.toml` Contributions to restore Kotlin/Dart parsing support are welcome (see `CONTRIBUTING.md`).