StateEvent

Marker interface for all state events.

State events represent triggers that can cause state transitions in a state machine. Events should be implemented as sealed interfaces or sealed classes to provide type safety and exhaustive when expressions.

Example usage:

sealed interface AuthEvent : StateEvent {
    data class Login(val username: String, val password: String) : AuthEvent
    data class LoginSuccess(val token: String) : AuthEvent
    data object Logout : AuthEvent
}

Events should be:

• Immutable data objects

• Self-contained with all necessary data

• Named with action verbs (Login, Save, Process, etc.)

• Specific to their domain or use case