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.

Built by LXGIC Studios

GitHub: github.com/lxgicstudios/ai-codemod
Twitter: @lxgicstudios

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