Yuki001/game-dev-skills ? reverse-engineered prompt

Build me a personal agent skills repository for game development, with a clean set of reusable skills I can drop into my coding assistant and use across different projects.

I want it to cover the full game making workflow, from planning and architecture, to design review, balance analysis, asset generation, image cleanup, shader helpers, and simple 3D model generation. It should also include a milestone based preproduction workflow for game ideas, so I can take a concept from rough notes to something ready for implementation.

Please make the skills practical and easy to follow, with clear instructions the assistant can use directly. Some skills should help with reviewing game concepts and mechanics, some should help with tuning numbers and testing balance, and others should help generate or prepare art assets and video frames. Keep everything organized in a way that feels useful for a solo developer or small indie team. If you need current docs for any external service or tool, look them up online first.