Type React components and hooks with TypeScript patterns. Use when typing React props, hooks, event handlers, or component generics in TypeScript. (triggers: **/*.tsx, ReactNode, FC, PropsWithChildren, ComponentProps)
Implement BullMQ job workflows in NestJS. Use when building queue processors, redis-throttler, Upstash limits, idle polling, stalled jobs, and retention policies. (triggers: **/*.processor.ts, **/*.module.ts, **/bull-queue.constants.ts, **/redis-throttler*.ts, queue, background job, worker, processor, bullmq, drainDelay, stalledInterval, removeOnComplete, redis limit, upstash, fail-open, throttler)
Configure gRPC, RabbitMQ, and monorepo contract patterns for NestJS microservices. Use when setting up gRPC service-to-service calls, RabbitMQ event-driven messaging, shared contract libraries, or microservice exception handling in NestJS. (triggers: main.ts, **/*.controller.ts, Transport.GRPC, Transport.RMQ, MicroserviceOptions)
Configure the 4 caching layers in Next.js: request memoization, data cache, full-route cache, and router cache. Use when setting revalidation strategies, invalidating cached data with tags, or diagnosing stale data bugs. (triggers: **/page.tsx, **/layout.tsx, **/action.ts, unstable_cache, revalidateTag, Router Cache, Data Cache)
Select and implement SSG, SSR, ISR, Streaming, or Partial Prerendering strategies in Next.js App Router. Use when choosing a rendering mode for a page, configuring generateStaticParams, or enabling PPR. (triggers: **/page.tsx, **/layout.tsx, generateStaticParams, dynamic, dynamicParams, PPR, streaming)
Configure SwiftUI state, view lifecycle, and Property Wrappers correctly. Use when managing SwiftUI state, view lifecycle, or property wrappers like @State and @Binding. (triggers: **/*.swift, @State, @Binding, @ObservedObject, View, body)
Configure Hilt dependency injection with proper scoping, modules, and constructor injection in Android. Use when setting up Hilt DI, component scoping, or defining modules. (triggers: **/*Module.kt, **/*Component.kt, @HiltAndroidApp, @Inject, @Provides, @Binds)
Secure storage, network traffic, and deep links in React Native mobile apps. Use when implementing secure storage, certificate pinning, or deep link validation in React Native. (triggers: **/*.tsx, **/*.ts, security, keychain, secure-storage, deep-link, certificate-pinning)
Push notifications for React Native using Firebase or Expo Notifications. Use when integrating push notifications with Firebase or Expo in React Native. (triggers: **/*notification*.ts, **/*notification*.tsx, **/App.tsx, Notifications, messaging, FCM, expo-notifications, react-native-firebase)
Deploy Spring Boot apps with Docker, GraalVM native images, and graceful shutdown. Use when deploying Spring Boot apps as GraalVM native images, containers, or configuring shutdown. (triggers: Dockerfile, compose.yml, docker-layer, native-image, graceful-shutdown)
Implement async/await, Actors, and structured concurrency in Swift. Use when implementing Swift async/await, Actors, or structured concurrency in iOS/macOS. (triggers: **/*.swift, async, await, actor, Task, MainActor)
OTA updates with CodePush, EAS Build, and release configurations. Use when configuring OTA updates, EAS Build, or managing release configs for React Native. (triggers: app.json, eas.json, android/app/build.gradle, ios/**, deployment, codepush, eas, release, build, fastlane)
Implement Jetpack Navigation Component with XML graphs and SafeArgs for type-safe fragment navigation. Use when working with XML-based Navigation Component or SafeArgs in Android. (triggers: navigation/*.xml, findNavController, NavDirections, navArgs)
Resolve iOS and Android differences using Platform API and native modules in React Native. Use when handling platform-specific behavior or integrating native modules in React Native. (triggers: **/*.tsx, **/*.ts, **/*.ios.*, **/*.android.*, Platform, Platform.select, native-module, ios, android)
Configure ViewModel state emission with StateFlow, sealed UiState classes, and lifecycle-safe collection in Android. Use when working with ViewModel files, UiState sealed classes, MutableStateFlow, collectAsStateWithLifecycle, or exposing state from ViewModels. (triggers: **/*ViewModel.kt, **/*UiState.kt, viewmodel, stateflow, livedata, uistate, MutableStateFlow, collectAsState, viewModelScope, UiState)
Organize strings, drawables, and Localization resources on Android. Use when managing Android resources, drawables, or adding localization support. (triggers: strings.xml, **/*Screen.kt, stringResource, plurals, R.string)
Implement navigation with Jetpack Compose Navigation and App Links on Android. Use when implementing navigation flows, deep links, or backstack handling in Android. (triggers: **/*Screen.kt, **/*Activity.kt, **/NavGraph.kt, NavController, NavHost, composable, navArgument, deepLinks)
Harden Intent handling, WebView configuration, and FileProvider access in Android apps. Use when securing Intent extras, configuring WebViews, or exposing files via FileProvider. (triggers: **/*Activity.kt, **/*WebView*.kt, AndroidManifest.xml, Intent, WebView, FileProvider, javaScriptEnabled)
Integrate State with Views using Coroutines and Lifecycle on Android. Use when managing state with ViewModels and Lifecycle-aware coroutines in Android. (triggers: **/*Fragment.kt, **/*Activity.kt, repeatOnLifecycle, launchWhenStarted)
Implement type-safe Jetpack Navigation Compose routes on Android. Use when implementing type-safe navigation graphs in Jetpack Compose for Android. (triggers: **/*NavHost.kt, **/*Graph.kt, NavHost, navController, @Serializable)
Integrate push notifications on Android using Firebase Cloud Messaging and NotificationCompat. Use when integrating FCM or local notifications in Android apps. (triggers: **/*Notification*.kt, **/MainActivity.kt, FirebaseMessaging, NotificationCompat, NotificationChannel, FCM)
Build declarative UI and manage data flow with SwiftUI in iOS. Use when building declarative SwiftUI views or managing data flow with property wrappers. (triggers: **/*View.swift, View, State, Binding, EnvironmentObject)
Build maintainable Flutter UI components with composition and theming. Use when building, refactoring, or reviewing Flutter widget implementations for maintainability. (triggers: **_page.dart, **_screen.dart, **/widgets/**, StatelessWidget, const, Theme, ListView)
Enforce universal mobile UX principles for touch-first interfaces including touch targets, safe areas, and mobile-specific interaction patterns. Use when building mobile screens, handling touch interactions, or validating safe area compliance. (triggers: **/*_page.dart, **/*_screen.dart, **/*_view.dart, **/*.swift, **/*Activity.kt, **/*Screen.tsx, mobile, responsive, SafeArea, touch, gesture, viewport)
