Tool	Description
`list_tools`	List all 40+ agent tools (BashTool, FileEditTool, etc.)
`list_commands`	List all 50+ slash commands (/commit, /review, etc.)
`get_tool_source`	Read a specific tool's implementation
`get_command_source`	Read a specific command's implementation
`read_source_file`	Read any file from `src/` by relative path
`search_source`	Regex search across the entire source tree
`list_directory`	List contents of any directory under `src/`
`get_architecture`	Get a full architecture overview

Resources

URI	Description
`claude-code://architecture`	README / architecture overview
`claude-code://tools`	Tool registry (JSON)
`claude-code://commands`	Command registry (JSON)
`claude-code://source/{path}`	Any source file (template)

Setup

cd mcp-server
npm install
npm run build

Configuration

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "claude-code-explorer": {
      "command": "node",
      "args": ["/absolute/path/to/claude-code/mcp-server/dist/index.js"],
      "env": {
        "CLAUDE_CODE_SRC_ROOT": "/absolute/path/to/claude-code/src"
      }
    }
  }
}

VS Code (GitHub Copilot)

Add to .vscode/mcp.json in your workspace:

{
  "servers": {
    "claude-code-explorer": {
      "type": "stdio",
      "command": "node",
      "args": ["${workspaceFolder}/mcp-server/dist/index.js"],
      "env": {
        "CLAUDE_CODE_SRC_ROOT": "${workspaceFolder}/src"
      }
    }
  }
}

Cursor

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "claude-code-explorer": {
      "command": "node",
      "args": ["/absolute/path/to/claude-code/mcp-server/dist/index.js"],
      "env": {
        "CLAUDE_CODE_SRC_ROOT": "/absolute/path/to/claude-code/src"
      }
    }
  }
}

Environment Variables

Variable	Default	Description
`CLAUDE_CODE_SRC_ROOT`	`../src` (relative to dist/)	Path to the Claude Code `src/` directory

Example Usage

Once connected, you can ask your AI assistant things like:

"List all Claude Code tools"
"Show me the BashTool implementation"
"Search for how permissions are checked"
"What files are in the bridge directory?"
"Read the QueryEngine.ts file, lines 1-100"
"How does the MCP client connection work?"

Development

npm run dev    # Watch mode — recompile on changes
npm run build  # One-time build
npm start      # Run the server