charliesbot/android-design ? reverse-engineered prompt

Build me an Android design helper for Jetpack Compose that gives clear, practical judgment on UI choices using Material 3 Expressive. I want it to help me design and review real app screens for phone, tablet, and desktop, with guidance on hierarchy, color, type, shape, motion, and which components to use. It should feel like an agent skill I can drop into Claude Code or similar tools, and the advice should be based on Google’s official guidance, not random design opinions.

If it makes sense, also add a way to explore a few design directions in a native preview app, then take the chosen direction and turn it into Compose code. Keep it clean and easy to use, with good README instructions for installing the skill and, if needed, running the preview app locally. Look up current docs online if you need to.