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CodeGraph

Local code graph for agents: an MCP server returns entry points, symbol links and change impact in one call

MCP serverMedium risk

colbymchenry/codegraphAuthor: Colby McHenry

Install

curl -fsSL https://raw.githubusercontent.com/colbymchenry/codegraph/main/install.sh | sh
codegraph install
codegraph init

Open a new terminal after installing the CLI. On Windows: irm https://raw.githubusercontent.com/colbymchenry/codegraph/main/install.ps1 | iex.

This is third-party code. Review the repository files before installing.

What it does

CodeGraph indexes a project into a SQLite graph of symbols, calls, imports and web framework routes across dozens of languages, from TypeScript and Python to Swift, Kotlin and COBOL. Through its MCP server the agent gets relevant code snippets and related symbols in one request instead of reading files step by step, searches a full-text index and checks what an edit will affect. The index stays fresh via file system events. The installer wires the server into Claude Code, Cursor, Codex, OpenCode, Gemini CLI, Kiro and GitHub Copilot, and no data leaves the machine.

Who it is for. For developers using agents in large repositories who want fewer tool calls and tokens.

Good fit when

  • The agent spends long searching for where a function lives and who calls it
  • You need the impact radius before a refactor
  • The project is mixed, for example iOS with React Native

Not a fit when

  • A small project with a few files
  • The agent does not support MCP

Example request

Show which parts of the code are affected if I change the createOrder signature

Limitations

Each project needs its own index via codegraph init. Only one index writer is allowed per project; extra clients should go through the shared daemon. The graph is static and does not replace running tests.

How to disable. Run codegraph uninstall to remove MCP config from every agent and the CLI itself. Remove a project index with codegraph uninit.

MCP

Transport
stdio
Authentication
not required

Security check

  • Reads all project code and stores an index in .codegraph
  • Edits MCP configuration of installed agents

README in short

The README covers a three-step setup: the CLI via script or npm, codegraph install to wire agents, and codegraph init per project. Features listed: a Rust core, full-text search, impact analysis, auto-sync, routes for 17 frameworks and bridges between Swift, Objective-C and React Native. It also covers uninstalling and common MCP connection issues. MIT licensed.

FAQ

Are API keys required?

No, per the README everything runs locally on SQLite with no external services.

Do I need to sync manually?

No, a file watcher updates the graph after changes automatically.

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