Universal Modder: A Practical Guide to AI Game Modding

Universal Modder is an open-source toolkit that equips AI coding agents with game-specific skills, a command-line interface, asset-generation support, and a shared knowledge base to research, build, test, and document PC game mods. It supports agents such as Codex CLI, Claude Code, Gemini CLI, and Cursor, requires Python 3.10 or later and ffmpeg, and optionally integrates with Blender and fal for asset creation. Its recommended workflow begins by scanning an owned game to identify its engine, version, save locations, anti-cheat status, and available modding routes, then searching community field notes before making changes. Users are encouraged to define a small offline, single-player feature, back up saves, review an agent’s planned file changes, test with separate save data, and validate the mod in the actual game for crashes, visual issues, animation problems, and compatibility concerns. The toolkit can assist with screenshots, recordings, publishing checks, and reusable documentation, while emphasizing that users should not share game files, decompiled code, API keys, or private data. Its safety rules prohibit online-game cheating and bypassing anti-cheat, DRM, or ownership controls, positioning the software as an organized aid rather than a replacement for understanding a game’s modding ecosystem or reviewing generated work.

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