hoangnguyen0403/android-concurrency
skills/android/android-concurrency/SKILL.md
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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SKILL.md
- name:
- android-concurrency
- description:
- 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.
Android Concurrency Standards
Priority: P0 (CRITICAL)
Implementation Guidelines
Structured Concurrency
- Scopes: Always use
viewModelScope(VM) orlifecycleScope(Activity/Fragment). - Dispatchers: INJECT Dispatchers (
DispatcherProvider) for testability. not hardcodeDispatchers.IO.
Flow usage
- Cold Streams: Use
Flowfor data streams. - Hot Streams: Use
StateFlow(State) orSharedFlow(Events). - Replay: Use
SharedFlowwithreplayonly when late subscribers must receive recent events. - Collection: Use
collectAsStateWithLifecycle()(Compose) orrepeatOnLifecycle(Views).
Anti-Patterns
- No GlobalScope: Use viewModelScope or lifecycleScope — never GlobalScope.
- No async/await by default: Prefer simple suspend functions; async only for parallel calls.
References
- Dispatcher Pattern
Canonical response anchors
- Additional task-grounded exact anchors: hardcode
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