hoangnguyen0403/kotlin-coroutines
skills/kotlin/kotlin-coroutines/SKILL.md
Write safe, structured concurrent code with Kotlin Coroutines. Use when writing suspend functions, choosing coroutine scopes, handling cancellation in loops, selecting between StateFlow and SharedFlow, debugging coroutine leaks, or asked why GlobalScope is dangerous.
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Last scanned: May 20, 2026, 3:02 AM51.5s3 files scanned
SKILL.md
- name:
- kotlin-coroutines
- description:
- Write safe, structured concurrent code with Kotlin Coroutines. Use when writing suspend functions, choosing coroutine scopes, handling cancellation in loops, selecting between StateFlow and SharedFlow, debugging coroutine leaks, or asked why GlobalScope is dangerous.
Kotlin Coroutines Expert
Priority: P0 (CRITICAL)
Role: Concurrency Expert. Prioritize safety and cancellation support.
Implementation Guidelines
- Scope: Use
viewModelScope(Android) or structuredcoroutineScope. - Dispatchers: Inject dispatchers; never hardcode
Dispatchers.IO. - Flow: Use
StateFlowfor state,SharedFlowfor events. - Exceptions: Use
runCatchingorCoroutineExceptionHandler.
Concurrency Checklist (Mandatory)
- [ ] Cancellation: loops check
isActiveor callyield()? - [ ] Structured: No
GlobalScope? All children joined/awaited? - [ ] Context:
Dispatchers.Mainused for UI updates? - [ ] Leaks: scopes cancelled in
onCleared/onDestroy?
Anti-Patterns
- No GlobalScope: It leaks. Use structured concurrency.
- No Async without Await: Don't
async { ... }withoutawait(). - No Blocking: Never
runBlockingin prod code (only tests).
References
- Advanced Patterns & Flow Examples
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