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yoyo

A code intelligence MCP server that gives your AI agent 28 t

yoyo

yoyo

A code intelligence MCP server that gives your AI agent 28 t

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Open Source
Free
DevTool
Built with
RustRust

yoyo is a revolutionary code intelligence MCP server designed to empower AI agents by providing them with 28 sophisticated tools to read and edit any codebase. Unlike traditional methods that rely solely on model memory, yoyo is grounded in the Abstract Syntax Tree (AST), ensuring a deeper and more accurate understanding of code.

Key Features:

  • 28 Powerful Tools: Offers a comprehensive suite of tools for code intelligence, including search, read, write, rename, trace, and analysis capabilities.
  • AST Grounding: Operates directly on the AST, providing a more precise and reliable code analysis than model-based memory.
  • Agent-Centric Design: Built specifically for AI agents, allowing them to seamlessly call and utilize these tools for complex tasks.
  • Orchestration Focus: Emphasizes the power of tool combinations, enabling agents to chain multiple operations for advanced code manipulation (e.g., supersearch → symbol → patch for finding, reading, and changing code; flow → multi_patch for tracing and fixing entire request paths).
  • High Accuracy: Demonstrates 99% eval accuracy across 6 real codebases (120 tasks), significantly outperforming baselines.
  • No API Keys, SaaS, or Telemetry: Operates without external dependencies, ensuring privacy and simplicity.
  • Wide Compatibility: Drop-in compatible with agents like Claude Code, Cursor, Codex CLI, Gemini CLI, OpenCode, and any other MCP-compatible agent.

Who is it for?

yoyo is for AI developers and teams building AI agents that need to interact with and manipulate codebases. It is particularly beneficial for agents focused on code understanding, refactoring, debugging, and automated code generation.

Main Problem Solved:

The primary problem yoyo solves is the limitation of AI agents in deeply understanding and reliably modifying code. Traditional methods often struggle with context and accuracy. yoyo bridges this gap by providing agents with precise, AST-based tools and powerful orchestration capabilities, leading to significantly better code-related outcomes.

Benefits:

  • Enhanced AI Agent Capabilities: Enables AI agents to perform complex code tasks with greater accuracy and efficiency.
  • Improved Code Quality: Facilitates deeper code analysis and more reliable modifications, leading to better overall code quality.
  • Reduced Development Time: Automates code interaction tasks, saving developers time and effort.
  • Increased Accuracy: The AST grounding and tool orchestration significantly reduce errors in AI-driven code operations.
  • Privacy and Control: The absence of API keys, SaaS, and telemetry ensures user data and operations remain private and under user control.

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