kotlin

# Kotlin Skill Kotlin coroutine patterns and testing: structured concurrency, Flow, StateFlow/SharedFlow, Channels, dispatchers, JUnit 5, Kotest, MockK, and coroutine test dispatchers. ## Reference Loading Table | Signal | Reference | Size | |--------|-----------|------| | concurrency, scopes, cancellation, dispatchers, exception handling | `references/concurrency-patterns.md` | ~130 lines | | Flow, StateFlow, SharedFlow, operators, flow builders | `references/flow-patterns.md` | ~120 lines | | Channels, producer-consumer, fan-in, fan-out | `references/channel-patterns.md` | ~100 lines | | GlobalScope, unstructured launch, CancellationException, failure modes | `references/preferred-patterns.md` | ~80 lines | | coroutine skill overview, structured concurrency principles | `references/kotlin-coroutines.md` | ~55 lines | | JUnit 5, Kotest, MockK, runTest, parameterized tests, assertions | `references/kotlin-testing.md` | ~290 lines | **Loading rule.** Read the references whose signals match the task before responding.