Integrate HttpClient, Interceptors, and API interactions in Angular. Use when integrating HttpClient, writing interceptors, or handling API calls in Angular.
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(req, next) => next(req.clone({ setHeaders: { Authorization: token } }))). Clone requests with req.clone( — class-based interceptors deprecated. Register via withInterceptors([...]) in provideHttpClient.http.post<T>(), http.get<T>(). Use inject(HttpClient) in services (not constructor injection). Add provideHttpClient(withInterceptors([...]), withFetch()) to app.config.ts.http in Components.Prefer httpResource<T>() over manual subscribe for reactive data loading — it auto-refetches when its signal inputs change:
// Reactive: refetches automatically when userId() changes
userResource = httpResource<User>(() => `/api/users/${this.userId()}`);
// States: .isLoading() | .hasValue() | .error() | .value() | .reload()
Use resource<T, P>({ request: () => params(), loader: ... }) for non-HTTP async operations with full .isLoading() lifecycle control.
shareReplay(1) in services.catchError or global interceptors, not components. Use notification service for display.HttpInterceptorFn functional interceptors.toSignal(http.get(...)) instead.When this skill applies, preserve the following domain terminology or equivalent concrete examples in the answer when relevant:
Encapsulate all HTTP calls
auto-refetches
http.post<T>
skip error handling
Additional task-grounded exact anchors: notification service
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Upgrade an Android project to Android Gradle Plugin (AGP) 9. Use when migrating to AGP 9, updating Gradle build files, migrating to built-in Kotlin, or adopting the new AGP DSL.
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Apply Clean Architecture layering, modularization, and Unidirectional Data Flow in Android projects. Use when setting up project structure, placing code in layers, configuring feature/core modules, or implementing UDF patterns; defer Compose state and ViewModel/StateFlow implementation to their specific skills.
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Implement WorkManager and background processing correctly on Android. Use when creating Worker classes, scheduling tasks, choosing between WorkManager and Foreground Services, or setting up Hilt in workers; defer FCM and notification delivery to android-notifications.
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Build high-performance declarative UI with Jetpack Compose. Use when writing Composable functions, optimizing recomposition, hoisting state, or working with LazyColumn and side effects; defer deep-link and navigation routing to android-navigation.
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Migrate an Android XML View to Jetpack Compose following a structured 10-step workflow. Use when converting XML layouts to Compose, setting up Compose in an existing View-based project, or incrementally adopting Compose.
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Write correct coroutine scopes, lifecycle collection, and dispatcher injection in Android production code. Use for suspend functions, coroutine scopes, and dispatcher mechanics; defer ViewModel StateFlow/LiveData architecture, Fragment lifecycle recipes, persistence/notifications, and unit-test recipes to their specific skills.
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