MCP C++ Analyzer

MCP C++ Analyzer

Provides precise C++ code semantic analysis for AI coding tools like Claude Code and Cursor by integrating clangd static analysis, enabling symbol definition lookup, reference tracking, and hover information.

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README

MCP C++ Analyzer

项目背景

使用AI 编程工具(如 GitHub Copilot、Cursor)辅助C++大型项目开发面临诸多局限性:

依赖处理效率低下:为了解决单个用户的问题,现有AI编程工具常常会整体引入整个头文件,甚至包含无关的源代码片段,如果引入的源码文件很大,那么就会导致上下文窗口和Token资源被大量占用,信息冗余,且容易引发理解混乱和响应延迟。

上下文感知能力不足:现有工具受限于上下文窗口大小,当项目代码超出窗口限制时,会对历史聊天结论内容进行文本压缩或信息截断,导致先前的分析信息丢失。

静态分析工具集成不足:在需要获取符号信息时,往往采用简单的文件内容搜索方式,缺乏与clangd等专业静态分析工具的深度集成,导致效率低下和分析结果不够精准。

项目介绍

MCP-CPP-Analyzer 是一个专为C++开发设计的Model Context Protocol (MCP) 服务,通过深度整合clangd静态分析工具,为Claude Code、Cursor等支持MCP协议的AI编程工具提供精确的C++代码语义分析能力。该服务通过符号定义查找、引用追踪、悬停信息获取等功能,实现AI工具与专业C++分析工具的无缝集成,解决现有AI编程工具在大型C++项目中的应用局限。

安装

环境要求

  • Python >= 3.12

先git clone到本地,然后安装:

uv sync //安装相关依赖
pip install -e .

请确保执行 pip install 时使用的 Python 版本 >= 3.12。可通过 python --version 确认。

使用方法

前置要求

  1. 安装 clangd:请确保已安装 clangd 并将其添加到系统环境变量(PATH)中

    • 下载地址:https://releases.llvm.org/download.html
  2. CPP项目生成 compile_commands.json:确保项目根目录包含 compile_commands.json 文件

MCP 客户端连接

Cursor 配置

在 C++ 项目下创建 .cursor/mcp.json

{
  "mcpServers": {
    "cpp-analyzer": {
      "command": "mcp-cpp-analyzer",
      "args": [
        "serve",
        "--transport", "stdio",
        "--compile-db-path", "<compile_commands.json所在目录>"
      ]
    }
  }
}

安装 Cursor Rule(可选,推荐)

将内置的 Cursor 规则文件安装到目标 C++ 项目中,引导 AI 优先使用 MCP 工具进行精确的符号分析:

# 安装到指定项目目录
mcp-cpp-analyzer install-rule /path/to/your/cpp-project

# 安装到当前目录
mcp-cpp-analyzer install-rule

规则文件会被复制到 <目标目录>/.cursor/rules/ 下,已存在的同名文件不会被覆盖。

当前已支持的能力

服务器提供以下 MCP 工具:

get_definition

查找符号定义位置

get_references

查找符号引用

get_hover

获取符号的悬停信息(类型、文档等)

diagnose_clangd

诊断 clangd 服务器状态和响应能力

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