What problem does it solve? Building Android screens that are theme-correct, adaptive, localized, accessible, and testable requires applying dozens of UX rules consistently; this Skill authors new Jetpack Compose screens and components with those rules applied at authoring time rather than retrofitted later. ## Core Features & Use Cases - Route/content screen generation: Produces a stateful route composable plus a stateless content composable per screen, with a sealed UI state, Navigation 3 keys, and event lambdas instead of a passed NavController. - UX rules baked in: Applies Material 3 theming, window-size-class adaptivity (list-detail, supporting-pane, feed), Material Symbols via a checked-in icon registry, externalized strings with German translations, 48dp/200%-font-scale accessibility, input validation with staged error timing, and perceived-performance hooks (200 ms loading rule, ReportDrawnWhen). - Tests and previews alongside: Emits @PreviewScreenSizes, @PreviewFontScale, and per-locale previews plus a Robolectric-hosted Compose test covering state rendering, interactions, state restoration, configuration variants, and input validation. - Use Case: Ask for a new settings screen with a form; the Skill proposes the screen contract, generates the composables, strings, previews, and Compose test through per-screen approval gates, and finishes with a green ./gradlew build. ## Quick Start Ask the assistant to build a new Compose screen, for example to scaffold a settings screen with a list-detail layout, previews, and a Compose test.
