Material UI skill
Teaches agents Material 3 design on Android
Markdown 
Jetpack Compose 
Material 3 A skill that walks coding agents through designing, implementing, and reviewing native Android UI with Jetpack Compose and Material 3 — including the Material 3 Expressive direction — instead of shipping the usual web-flavored approximations.
It bundles reference files an agent can pull in per task, and has its own marketing site.