LLDB MCP Integration

This project provides a Model-Context Protocol (MCP) integration for LLDB, allowing AI assistants like Claude to interact with your debugging sessions through a standardized interface.

Overview

The integration consists of two main components:

1. server.py - An MCP server that communicates with Claude (or other MCP clients)
2. lldb_plugin.py - A plugin that runs inside LLDB and exposes debugger functionality via JSON-RPC

This architecture allows Claude to help you debug code by directly interacting with LLDB through natural language. The MCP server acts as a bridge, translating Claude's requests into LLDB commands and returning results in a structured format.

Installation

Prerequisites

• Python 3.10 or higher
• LLDB with Python bindings
• fastmcp Python package (for Claude Desktop integration)

Setup

1. Clone this repository:

   git clone https://github.com/ant4g0nist/lldb-mcp.git
   cd lldb-mcp
   

2. Install required dependencies:

   pip install "fastmcp>=1.2.0" httpx
   

   or

   uv install "fastmcp>=1.2.0" httpx
   

Usage

Method 1: Using with Claude for Desktop

1. Make sure Claude for Desktop is installed and updated to the latest version.

2. Configure Claude for Desktop to use the LLDB MCP server by editing:

   • path: ~/Library/Application Support/Claude/claude_desktop_config.json

3. Update the paths and add the LLDB MCP configuration:

   {
     "mcpServers": {
       "lldb": {
         "command": "/path/to/your/.local/bin/uv",
         "args": [
           "--directory",
           "/path/to/your/lldb-mcp/llmcp",
           "run",
           "lldb_mcp.py"
         ]
       }
     }
   }
   

4. Restart Claude for Desktop.

5. Start a debugging session in LLDB and enable the MCP server with:

   (lldb) command script import lisa.py
   

6. You should now see the LLDB tools available in Claude for Desktop. Look for the hammer icon.

Method 2: Direct LLDB Integration

If you prefer to use the plugin directly from LLDB without Claude for Desktop:

1. Add the following to your ~/.lldbinit file to load the plugin automatically:

   command script import /path/to/lldb_plugin.py
   

2. In your LLDB session, start the MCP server:

   (lldb) mcp start
   

3. The server will be available at http://localhost:13338 for any MCP client to connect to.

Available LLDB Tools

The MCP server exposes the following methods for AI assistants: