Codemod — AI-Powered Code Migration CLI

Introduction

Codemod is an AI-powered code migration CLI tool with 970+ GitHub stars. It supports multi-step YAML workflows, ast-grep AST pattern matching, and a community codemod registry. Ideal for teams facing large-scale framework upgrades or refactors.

Codemod — AI-Driven Code Migration Platform

The Problem It Solves

Upgrading frameworks across hundreds of files (Next.js 12→13, React class → hooks) is tedious and error-prone. Codemod provides deterministic AST-based transforms with AI enhancement — define a migration rule once and execute it reliably across the entire codebase.

Core Features

• CLI execution — run migrations in terminal or CI
• YAML workflows — multi-step migrations with matrix strategies and approval gates
• ast-grep — precise AST pattern matching
• Community registry — discover and share popular migrations
• MCP integration — use codemods from AI coding assistants

FAQ

Q: What is Codemod? A: An open-source CLI and platform for large-scale AI-driven code migrations using AST-based transforms for safe refactoring.

Q: Is it free? A: Completely free and open source under the Apache-2.0 license.