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Let an AI coding agent mod the PC games you own
universal-modder gives AI coding agents like Claude Code, Codex and Cursor the skills to turn a game you own into a working mod — from reading its code to a finished result.
It's a skill pack that teaches an AI agent to find a game's engine, read its code, build a mod, make art and sound, and test everything inside the game itself.
When it helps
Useful if you own a PC game and want to change something in it without learning modding tools yourself. Won't work on online games or other players' characters — anti-cheat blocks that.
Pros
- Works out the game's engine and code on its own
- Generates art, 3D models and sound via fal.ai
- Tests the mod inside the actual running game
- Automatically makes a demo video of the mod
Cons
- Requires Python 3.10+, ffmpeg and Blender on your machine
- Asset generation needs a paid fal.ai account
- Can't mod online games or other players' characters due to anti-cheat
How to set it up — step by step
- 1Install the plugin in Claude Code: /plugin marketplace add rehan-remade/universal-modder
- 2Then run: /plugin install universal-modder@universal-modder
- 3Create a fal.ai account — needed for generating art, 3D models and sound
- 4Send the agent the text from the block below
- 5Review the mod plan the agent proposes and approve it
- 6Launch the game and check that the finished mod works as intended
Text for your agent
Copy this and send it to your agent — Claude Code, Codex, any of them:
Open https://github.com/rehan-remade/universal-modder, install this skill pack for Claude Code, and suggest how to mod [your game] — ask me for a fal key if you need one.
A regular gaming PC with the game already installed, Claude Code (or another supported agent), Git, Python 3.10+ and ffmpeg. Blender is needed to render 3D models into sprites. For art, 3D and audio generation you need a fal.ai account (you can sign in through the browser without buying a key upfront). Windows games run natively or through WSL.
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