skills/ HoangNguyen0403/agent-skills-standard

android-concurrency

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 reci

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SKILL.md

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Android Concurrency Standards

Priority: P0 (CRITICAL)

Implementation Guidelines

Structured Concurrency

  • Scopes: Always use viewModelScope (VM) or lifecycleScope (Activity/Fragment).
  • Dispatchers: INJECT Dispatchers (DispatcherProvider) for testability. not hardcode Dispatchers.IO.

Flow usage

  • Cold Streams: Use Flow for data streams.
  • Hot Streams: Use StateFlow (State) or SharedFlow (Events).
  • Replay: Use SharedFlow with replay only when late subscribers must receive recent events.
  • Collection: Use collectAsStateWithLifecycle() (Compose) or repeatOnLifecycle (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

Canonical response anchors

  • Additional task-grounded exact anchors: hardcode

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