CodeReviewer
FreeNot checkedA three-layer funnel AI code review engine that reduces LLM token consumption by 70%+ while providing deep code analysis. It integrates with GitHub PRs via MCP
About
A three-layer funnel AI code review engine that reduces LLM token consumption by 70%+ while providing deep code analysis. It integrates with GitHub PRs via MCP protocol to automate code review with static analysis, RAG, and LLM-based checks.
README
基于 MCP 协议的三层漏斗式 AI 代码审查引擎 通过确定性静态分析与动态模型路由,在保证审查深度的同时降低 70%+ 的 LLM Token 消耗。
Python 3.11+ MCP Protocol License: MIT
🏗️ 架构
PR 触发 → GitHub Actions
→ git diff (宿主机) → Docker 容器
→ ci_runner.py
→ 白名单代码提取 + 正则函数提取
→ RAG 规范检索 (独立降级)
→ 影响面雷达 ripgrep (独立降级)
→ Phase3 Prompt 拼装
→ LLM 审查 (deepseek-v4-flash)
→ 三级防御 L1/L2/L3 → GitHub 行级评论 (含 Suggestion)
→ ReviewMetrics 落盘 → upload-artifact
🚀 快速开始
1. 安装
git clone <repo-url>
cd mcp-code-reviewer
pip install -r requirements.txt
2. Mock 模式(无需 API Key)
python orchestrator.py --mock
3. 真实审查
export DEEPSEEK_API_KEY=***
python orchestrator.py
4. 接入 GitHub PR
# 复制 workflow 到目标仓库
cp .github/workflows/ai-review.yml <target-repo>/.github/workflows/
# 配置 Secrets: DEEPSEEK_API_KEY
# 配置 Actions 权限: Read and write
# 创建 PR,自动触发审查
📁 项目结构
├── mcp_server.py # MCP Server (3 Tools)
├── orchestrator.py # MCP Client + Prompt 工程
├── ci_runner.py # CI/CD 桥梁 + 三级防御
├── rag_engine.py # 轻量 RAG (SQLite)
├── impact_analyzer.py # 影响面雷达 (ripgrep)
├── metrics.py # ReviewMetrics 黑匣子
├── Dockerfile # 生产级镜像
├── scripts/
│ └── aggregate_metrics.py # Metrics 聚合分析
└── test_cases/ # 测试用例
🛡️ 三级防御
| 级别 | 方法 | 防护目标 |
|---|---|---|
| L1 | unidiff 行号映射 O(1) 精确匹配 | 防 LLM 幻觉原代码 |
| L2 | 物理字符串切片提取缩进 | 防正则跨行漏洞 |
| L3 | AST 宽容预检 + 补 pass | 防破坏性提交 |
校验失败不丢弃 issue → 降级为纯文本警告评论。
🧪 测试
python test_static_analysis.py # 15 用例 ✅
python test_complexity_router.py # 9 用例 ✅
python eval_quality.py # LLM 质量评估 (30 bugs)
📊 可观测性
每次审查自动生成 review_metrics.json,包含 30+ 指标:
- 管线各阶段耗时 (RAG/雷达/LLM)
- 三级防御 L1/L2/L3 通过/失败计数
- Suggestion 成功率
- RAG 降级率
# 本地聚合分析
python scripts/aggregate_metrics.py ./downloaded_metrics/
🔧 技术栈
| 组件 | 技术 |
|---|---|
| MCP Server | Python + mcp SDK + FastAPI |
| 静态分析 | ast.NodeVisitor |
| Diff 解析 | unidiff |
| 影响面分析 | ripgrep |
| RAG | SQLite + numpy |
| LLM Gateway | litellm |
| 容器化 | Docker (python:3.11-slim) |
| CI/CD | GitHub Actions |
📝 技术债
License
MIT
Installing CodeReviewer
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/jack-hack666/mcp-code-reviewerFAQ
Is CodeReviewer MCP free?
Yes, CodeReviewer MCP is free — one-click install via Unyly at no cost.
Does CodeReviewer need an API key?
No, CodeReviewer runs without API keys or environment variables.
Is CodeReviewer hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install CodeReviewer in Claude Desktop, Claude Code or Cursor?
Open CodeReviewer on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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