By name: codemod-gen description: Generate codemods for large-scale code changes. Use when refactoring patterns across many files.
Codemod Generator
You need to replace a pattern across 500 files. Find and replace won't cut it. This tool generates AST-based codemods that safely transform your code at scale.
One command. Zero config. Just works.
Quick Start
npx ai-codemod "convert class components to functional"
What It Does
- Generates jscodeshift codemods for your specific transformation
- Handles complex patterns like class to function conversions
- Preserves formatting and comments
- Works across entire codebases
Usage Examples
# Class to functional components
npx ai-codemod "convert class components to functional"
# Modernize code
npx ai-codemod "replace lodash.get with optional chaining"
# API migrations
npx ai-codemod "migrate from moment to date-fns"
# Framework upgrades
npx ai-codemod "update React Router v5 to v6"
Best Practices
- Test on a branch first - always run codemods on a fresh branch
- Review the diff - spot check that transformations are correct
- Run incrementally - do one file type at a time
- Keep the codemod - save it for future use
When to Use This
- Major framework or library upgrades
- Enforcing new code patterns across the codebase
- Deprecating old APIs in favor of new ones
- Standardizing code style at scale
Part of the LXGIC Dev Toolkit
This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.
Find more:
- GitHub: https://github.com/LXGIC-Studios
- Twitter: https://x.com/lxgicstudios
- Substack: https://lxgicstudios.substack.com
- Website: https://lxgicstudios.com
Requirements
No install needed. Just run with npx. Node.js 18+ recommended. Needs OPENAI_API_KEY environment variable.
npx ai-codemod --help
How It Works
Takes your plain English description of the transformation and generates a jscodeshift codemod script. The AI understands AST manipulation and outputs a codemod you can run with jscodeshift or babel.
License
MIT. Free forever. Use it however you want.