Idiomatic Kotlin patterns for Android AI agents. Use this skill whenever writing Kotlin code for Android, especially: coroutines, Flow, StateFlow, SharedFlow, viewModelScope, lifecycleScope, Dispatchers, withContext, suspend functions, sealed classes, sealed interfaces, data classes, extension functions, scope functions (let, apply, also, run, with), null safety, !! operator, runCatching, Result, lazy, by delegate, stateIn, flatMapLatest, combine, error handling, structured concurrency, or any Kotlin-specific patterns. Always apply before writing coroutines, Flow chains, or data modeling code.
Material 3 Expressive components and theming for Android AI agents. Use this skill for any M3 component: TopAppBar, LargeTopAppBar, CenterAlignedTopAppBar, BottomAppBar, FAB, ExtendedFAB, NavigationBar, NavigationRail, NavigationDrawer, NavigationSuiteScaffold, ModalBottomSheet, Chip (Filter/Assist/Input/Suggestion), Badge, SegmentedButton, DatePicker, TimePicker, SearchBar, Slider, Switch, Checkbox, RadioButton, ListItem, Divider, ProgressIndicator, Snackbar, Tooltip, PullToRefreshBox, ExposedDropdownMenuBox, Card/ElevatedCard/OutlinedCard, shape morphing, MotionScheme, dynamic color, tonal elevation, surface containers, color roles, M3 migration from M2. Always apply when using any androidx.compose.material3 API.
Jetpack Compose animations for Android AI agents — M3 Expressive motion system. Use this skill for any animation: AnimatedVisibility, AnimatedContent, Crossfade, animate*AsState, animateColorAsState, animateDpAsState, animateFloatAsState, updateTransition, InfiniteTransition, rememberInfiniteTransition, spring physics, tween, keyframes, snap, M3 Expressive motion tokens, MotionScheme, animateItemPlacement, LazyList item animations, shared element transitions, SharedTransitionLayout, predictive back animation, shimmer loading skeleton screens, morphing shapes, gesture-driven animation, or any motion in Compose. Always apply when adding any animation — M3 Expressive replaced fixed easing curves with physics-based springs.
Jetpack Compose Navigation for Android AI agents. Use this skill whenever implementing navigation, NavHost, NavController, back stack, deep links, navigation arguments, routes, type-safe navigation, @Serializable routes, navController.navigate, popBackStack, navigateUp, bottom navigation, tab navigation, nested navigation graphs, shared ViewModels across destinations, navigation with Hilt, passing arguments between screens, transition animations between screens, or any navigation pattern. Always apply before writing any NavHost or navigation logic. Triggers on: navigate, NavController, NavHost, route, backstack, deep link, navigation argument, destination, composable(), navigation graph.
Adaptive UI for Android — responsive layouts for phones, tablets, foldables, Chromebooks, and large screens. Use this skill for EVERY screen you build. Triggers on: WindowSizeClass, ListDetailPaneScaffold, SupportingPaneScaffold, ThreePaneScaffold, NavigationSuiteScaffold, NavigationRail, NavigationDrawer, adaptive layout, responsive, tablet layout, foldable, FoldingFeature, two-pane, large screen, GridCells.Adaptive, WindowWidthSizeClass, WindowHeightSizeClass, landscape, Chromebook, bottom sheet to side sheet, dialog sizing, content width, LazyVerticalGrid, breakpoints, hinge, fold state. Apply to EVERY screen — AI agents without this produce phone-only apps on 1B+ large-screen Android devices.
Global-level design system for Android AI agents — Material 3 Expressive. Use this skill for visual consistency: spacing tokens, 8dp grid, M3 typography scale (15 styles), HCT color system, dynamic color Material You, shape system with morphing, motion tokens, physics-based spring animations, design tokens, AppButton/AppCard/AppTextField components, loading/error/empty states, dark mode, surface containers, tonal elevation, or when any two screens look visually different. Always apply when starting any new screen — without this skill AI agents produce apps where every screen looks designed by a different person. Apply immediately alongside compose-ui, material3, and adaptive-ui skills.
Supabase Kotlin SDK for Android AI agents. Use this skill whenever integrating Supabase in Android apps: supabase-kt setup, Auth (email/password, Google, phone OTP), UnauthorizedRestException fix, persistSession configuration, getUser(jwt) pattern, FunctionsHttpException, Edge Functions invocation, Realtime subscriptions, Postgres queries, Row Level Security, Supabase Storage file upload, sessionStatus Flow, verify_jwt in config.toml, @Serializable DTOs, decodeList, or any supabase-kt usage in Kotlin/Android.
Play Store release process for Android AI agents. Use this skill whenever preparing an Android app for Play Store submission, creating a release AAB, app signing, Play App Signing, version code management, release tracks (internal/alpha/beta/production), store listing requirements, content ratings, data safety form, target API level requirements, Play Store policies, APK vs AAB, deobfuscation files, ProGuard mappings, release notes, screenshots requirements, feature graphic, app icon requirements, or any Play Store publishing step. Always apply before any release build.