How do I install the Codemod Gen skill?

Run npx skillmds@latest add modbender/codemod-gen in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Codemod Gen safe to use?

This skill has not completed SkillMD's automated safety review yet. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. Capability flags: makes network calls. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Codemod Gen?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Codemod Gen free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Codemod Gen?

modbender (@modbender) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Codemod Gen by modbender — Agent Skill

Name: Codemod Gen
Rating: 4.2 (5 reviews)
Author: modbender

File contents

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

---name: codemod-gendescription: 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 ```bash 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 ```bash # 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. ```bash 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](https://github.com/lxgicstudios/ai-codemod) - Twitter: [@lxgicstudios](https://x.com/lxgicstudios)

Frequently asked questions

Codemod Gen