htdt/godogen ? reverse-engineered prompt

Build me a tool called Godogen that helps me turn a simple game idea into a working game project.

I want to choose an engine, either Godot 4, Bevy, or Babylon.js, and choose whether I am using Claude Code or Codex. Then it should publish a fresh game repo with the right setup for that engine, including the runtime instructions, the engine guide, and the asset generation skill. After that, the agent should be able to read a short game description, build the game, generate any needed assets, run it, and show proof that it works, either in a live browser game or with a short recording.

Please make the publishing flow easy to run from one script, and keep the generated repo as thin as possible so the agent can recreate the rest from the guide. If you need current docs for any of the tools involved, look them up online.