jgravelle

github-codemunch-mcp

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Token-efficient MCP server for GitHub source code exploration via tree-sitter AST parsing

github-codemunch-mcp

Token-efficient MCP server for GitHub source code exploration via tree-sitter AST parsing.

Overview

github-codemunch-mcp pre-indexes repository source code using tree-sitter AST parsing, extracting a structured catalog of every symbol (function, class, method, constant, type). Each symbol stores only its signature + one-line summary, with the ability to retrieve full source on demand.

Token Savings

Scenario Raw dump codemunch Savings
Explore 500-file repo structure ~200,000 tokens ~2,000 tokens 99%
Find a specific function ~40,000 tokens ~200 tokens 99.5%
Read one function body ~40,000 tokens ~500 tokens 98.7%

Quick Start

Installation

pip install github-codemunch-mcp

Configure MCP

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "github-codemunch": {
      "command": "github-codemunch-mcp",
      "env": {
        "GITHUB_TOKEN": "your_github_token",
        "ANTHROPIC_API_KEY": "your_anthropic_key"
      }
    }
  }
}

Usage

  1. Index a repository:

    index_repo: { "url": "owner/repo" }
    
  2. Search for symbols:

    search_symbols: { "repo": "owner/repo", "query": "authenticate" }
    
  3. Get file outline:

    get_file_outline: { "repo": "owner/repo", "file_path": "src/main.py" }
    
  4. Read symbol source:

    get_symbol: { "repo": "owner/repo", "symbol_id": "src-main-py::MyClass.login" }
    

Supported Languages

  • Python (.py)
  • JavaScript (.js, .jsx)
  • TypeScript (.ts, .tsx)
  • Go (.go)
  • Rust (.rs)
  • Java (.java)

Tools

Tool Purpose
index_repo Index a repository's source code
list_repos List indexed repositories
get_file_tree Get repository file structure
get_file_outline Get symbols in a file
get_symbol Get full source of a symbol
get_symbols Batch retrieve multiple symbols
search_symbols Search across all symbols

Environment Variables

Variable Purpose Required
GITHUB_TOKEN GitHub API authentication No
ANTHROPIC_API_KEY AI summarization No
CODE_INDEX_PATH Custom storage path No

License

MIT

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