Tetrad

Tetrad is a high-performance MCP (Model Context Protocol) server that orchestrates three AI-powered CLI code evaluation tools—OpenAI Codex, Google Gemini CLI, and Alibaba Qwen—to independently validate every piece of code generated by Claude Code. Tetrad implements a quadruple consensus protocol, requiring all four intelligences (including Claude) to agree before code is accepted. The system offers reasoning cycle feedback, result caching, plugin extensibility, SQLite persistence, and full CLI management. It is ideal for teams and developers seeking rigorous, multi-LLM code quality assurance, especially in environments using Claude Code for software development.