> browse/registry

> github-actions

GitHub Actions workflow patterns for React Native iOS simulator and Android emulator cloud builds with downloadable artifacts. Use when setting up CI build pipelines or downloading GitHub Actions artifacts via gh CLI and GitHub API.

> react-native-brownfield-migration

Provides an incremental adoption strategy to migrate native iOS or Android apps to React Native or Expo using @callstack/react-native-brownfield for initial setup. Use when planning migration steps, packaging XCFramework/AAR artifacts, and integrating them into host apps.

> upgrading-react-native

Upgrades React Native apps to newer versions by applying rn-diff-purge template diffs, updating package.json dependencies, migrating native iOS and Android configuration, resolving CocoaPods and Gradle changes, and handling breaking API updates. Use when upgrading React Native, bumping RN version, updating from RN 0.x to 0.y, or migrating Expo SDK alongside a React Native upgrade.

> kotlin-multiplatform

Expert guidance for Kotlin Multiplatform (KMP), JetBrains' technology for sharing code between Android, iOS, web, and desktop applications. Helps developers build shared business logic, networking, and data layers in Kotlin while keeping UI native on each platform.

> android-deployment

Standards for App Distribution (Signing, Obfuscation, App Bundles). Use when signing, obfuscating, or building Android App Bundles for distribution. (triggers: build.gradle.kts, proguard-rules.pro, signingConfigs, proguard, minifyEnabled, .aab)

> android-legacy-state

Standards for State integration with Views using Coroutines and Lifecycle. Use when managing state with ViewModels and Lifecycle-aware coroutines in Android. (triggers: **/*Fragment.kt, **/*Activity.kt, repeatOnLifecycle, launchWhenStarted)

> android-performance

Standards for Baseline Profiles, Startup Time, and UI Rendering. Use when optimizing app startup, jank, or UI rendering performance in Android. (triggers: **/*Benchmark.kt, **/*Initializer.kt, BaselineProfile, JankStats, recomposition)

> android-resources

Standards for Strings, Drawables, and Localization. Use when managing Android resources, drawables, or adding localization support. (triggers: strings.xml, **/*Screen.kt, stringResource, plurals, R.string)

> android-tooling

Standards for Static Analysis (Detekt, Ktlint) and CI/CD Checks. Use when configuring Detekt, Ktlint, lint rules, or CI/CD for Android projects. (triggers: build.gradle.kts, detekt.yml, detekt, ktlint, lint)

> android-xml-views

Standards for ViewBinding, RecyclerView, and XML Layouts. Use when implementing XML layouts, ViewBinding, or RecyclerView adapters in Android. (triggers: layout/*.xml, **/*Binding.java, **/*Binding.kt, ViewBinding, ConstraintLayout, RecyclerView)

> android-networking

Standards for Retrofit, OkHttp, and API Communication. Use when integrating Retrofit, OkHttp, or API clients in Android apps. (triggers: **/*Api.kt, **/*Service.kt, **/*Client.kt, Retrofit, OkHttpClient, @GET, @POST)

> android-persistence

Standards for Room Database and DataStore. Use when implementing Room database schemas or DataStore preferences in Android. (triggers: **/*Dao.kt, **/*Database.kt, **/*Entity.kt, @Dao, @Entity, RoomDatabase)

> android-testing

Standards for Unit Tests, UI Tests (Compose), and Hilt Integration. Use when writing unit tests, Compose UI tests, or Hilt test modules in Android. (triggers: **/*Test.kt, **/*Rule.kt, @Test, runTest, composeTestRule)

> kotlin-coroutines

Standards for safe, structured concurrency in Kotlin. Use when implementing Kotlin Coroutines, structured concurrency, or Flow in Android or backend. (triggers: **/*.kt, suspend, CoroutineScope, launch, async, Flow)

> android-concurrency

Standards for Coroutines, Flow, and Threading. Use when working with async operations, Coroutines, or Flow in Android. (triggers: **/*.kt, suspend, viewModelScope, lifecycleScope, Flow)

> android-legacy-security

Standards for Intents, WebViews, and FileProvider. Use when securing Intent handling, WebViews, or FileProvider access in Android. (triggers: **/*Activity.kt, **/*WebView*.kt, AndroidManifest.xml, Intent, WebView, FileProvider, javaScriptEnabled)

> android-compose

Standards for high-performance Declarative UI and State Hoisting. Use when building Jetpack Compose UIs or managing composable state in Android. (triggers: **/*.kt, @Composable, Modifier, Column, Row)

> kotlin-best-practices

Core patterns for robust Kotlin code (Scope Functions, Backing Properties). Use when writing Kotlin code using scope functions, extension functions, or data classes. (triggers: **/*.kt, apply, let, run, also, with, backing property, collection)

> android-navigation-type-safe

Standards for Jetpack Navigation Compose (Type-safe). Use when implementing type-safe navigation graphs in Jetpack Compose for Android. (triggers: **/*NavHost.kt, **/*Graph.kt, NavHost, navController, @Serializable)

> android-security

Standards for Data Encryption, Network Security, and Permissions. Use when implementing encryption, network security config, or permission handling in Android. (triggers: network_security_config.xml, AndroidManifest.xml, EncryptedSharedPreferences, cleartextTrafficPermitted, intent-filter)