---
slug: "universal-modder"
name: "universal-modder"
effect: "Gives a coding agent skills, a CLI and a shared knowledge base for modding PC games you own"
category: "devtool"
tier: "rising"
url: "https://github.com/rehan-remade/universal-modder"
github: "rehan-remade/universal-modder"
pricing: "open-source"
license: "MIT"
tags: ["game-modding", "reverse-engineering", "agent-skills", "game-assets", "cli"]
platforms: ["claude-code", "codex", "gemini-cli", "vscode", "cursor", "windows"]
install_kind: "cli"
date_added: "2026-10-15"
rank: 1
rising_score: 83
stars: 7697
star_velocity: 513.1
velocity_basis: "since creation"
created_at: "2026-09-30T05:00:35Z"
pushed_at: "2026-10-15T04:33:46Z"
signals_status: "ok"
signals_fetched_at: "2026-10-15T05:02:34.804Z"
page: "https://agenttooldrop.com/tools/universal-modder"
---

# universal-modder

Gives a coding agent skills, a CLI and a shared knowledge base for modding PC games you own

Category: Devtools. Tier: new and rising, rank 1 by new and rising score (83 of 100). Pricing: Open source. License: MIT.

Platforms: claude-code, codex, gemini-cli, vscode, cursor, windows.

## Why you would want it

universal-modder packages Agent Skills, three subagents and a Python CLI called um that a coding agent uses to mod a game: um scan finds Steam, Epic and Xbox installs and fingerprints the engine, loaders, anti-cheat and save folders, um backup snapshots saves, and um fal, um sprite and um render3d make and fit art, 3D and audio for the engine. The mod-any-game skill runs a fixed loop of recon, a backed-up lab, reading the real code, building one slice, testing it in the running game and writing a field note. Those field notes live in a knowledge base in the repo that agents search with um kb before starting and add to by pull request.

## Best for

- Modding single-player PC games with an agent
- Generating sprites and 3D assets for mods
- Reusing other agents' modding notes

## Use it when

You want Claude Code, Codex, Gemini CLI or another agent to work out how a game you own is built and ship a mod for it, with assets and an in-game test.

## Skip it if

You play online games with anti-cheat: its own safety notes say injecting into an online client breaks the game's terms and gets accounts banned, and it refuses to do so. It touches game folders, saves, processes and your mouse and keyboard (asking first), asset generation needs a fal API key or a local ComfyUI server, and the repo is about two weeks old with no tagged release.

## Editor note

Outside a plugin install, the README installs the um CLI with `uv tool install git+https://github.com/rehan-remade/universal-modder`; it also needs Git, Python 3.10+ and ffmpeg.

## Install

Install as a Claude Code plugin:

```sh
/plugin marketplace add rehan-remade/universal-modder
/plugin install universal-modder@universal-modder
```

Source: https://github.com/rehan-remade/universal-modder#install

## Live signals

Fetched 2026-10-15T05:02:34.804Z (status: ok).

- Repository: rehan-remade/universal-modder
- Repository created: 2026-09-30
- Stars: 7,697 (GitHub's count; it cannot be authenticated)
- Stars per day, since repo creation: 513.1 (an average over the repo's life, not a growth rate)
- Forks: 828
- Open issues and PRs: 14
- License (GitHub): MIT
- Last push: 2026-10-15
- Latest release: none

## Links

- Website: https://github.com/rehan-remade/universal-modder
- GitHub: https://github.com/rehan-remade/universal-modder
- Install instructions verified at: https://github.com/rehan-remade/universal-modder#install
- Source for this entry: https://github.com/rehan-remade/universal-modder#readme
- AgentToolDrop page: https://agenttooldrop.com/tools/universal-modder
- Full catalog (JSON): https://agenttooldrop.com/tools.json