Serena: MCP Toolkit for Semantic Retrieval and Editing of Coding Agents

Serena is a Python toolkit based on the Model Context Protocol (MCP), aiming to provide an IDE-like development experience for coding agents. It integrates two core functions: semantic retrieval and code editing, allowing agents to understand the codebase and directly modify files without relying on external editors or manual operations. For developers using AI coding agents such as Claude Code, Claude, or Codex, Serena acts as a plugin or middleware, streamlining the agent's workflow—from retrieving relevant code snippets to executing modifications—all within the same tool. The project has gained 26,113 stars on GitHub, with 217 new stars in the last 7 days, making it an active open-source tool in the Python ecosystem.