Choosing an Integration

Choosing an Integration

	SKIE	KMP-NativeCoroutines
Swift shape	Typed AsyncSequence plus current value	Generated NativeFlow callback
Product	KMPObservableBridgeSKIE	KMPObservableBridgeNative
Configuration	Macro fields or explicit key paths	Explicit NativeFlow key path
Field metadata	Available for macro fields	Global by default
Reflection	None	None

SKIE

Use SKIE when synchronous StateFlow value access and field-aware Observation fit the application:

@KMPObservable(
    ArticleViewModel.self,
    fields: \.articleState
)
extension ArticleViewModel: @retroactive KMPStaticallyObservable {}

Swift macros cannot inspect members of an imported Kotlin type. Explicit fields are therefore required and compiler checked.

KMP-NativeCoroutines

NativeFlow supplies observation and cancellation; a separately exported property supplies the current renderable value:

@KMPStateObject(
    state: \.kmpObservationFlow,
    updatePolicy: .immediate
)
private var example = BridgeExampleViewModel()

Text(example.nativeMessageValue)

Choose the exporter already validated by the application unless measurements justify migration. The core bridge also supports callbacks, Combine publishers, and custom adapters.