protocol · iOS 26.0+ · SDK 27.1
protocol AppMigrationExtension : AppExtension, SendableAn app extension you extend to participate in data export and import. During migration, the system calls your extension to collect and export its data to the receiving device. On import, the system calls your app extension just after app installation, but before the app is actually launchable. The protocols specific to import and export operations extend this type, such as ``ResourcesExportingWithOptions`` and ``ResourcesImporting``. For your app extension to successfully export or import data in response to a system call, it needs to conform to one or more of these child protocols.
var appContainer: MigrationDataContainer { get }The data container of the containing app. To access the containing app's data, your app requires the `com.apple.developer.app-migration.data-container-access` entitlement.
@MainActor var configuration: some AppExtensionConfiguration { get }No declarations were skipped in this snapshot.