Kotlin Expert

Advanced Kotlin patterns for AmethystMultiplatform. Covers Flow state management, sealed hierarchies, immutability, DSL builders, and inline functions with real codebase examples.

Mental Model

Kotlin in Amethyst:

State Management (Hot Flows)
    ├── StateFlow<T>           # Single value, always has value, replays to new subscribers
    ├── SharedFlow<T>          # Event stream, configurable replay, multiple subscribers
    └── MutableStateFlow<T>    # Private mutable, public via .asStateFlow()

Type Safety (Sealed Hierarchies)
    ├── sealed class           # State variants with data (AccountState.LoggedIn/LoggedOut)
    └── sealed interface       # Generic result types (SignerResult<T>)