swiftui-uikit-interop-skill

Use this skill to bridge SwiftUI and UIKit in either direction. Embed SwiftUI in a UIKit app -- present or child-embed a UIHostingController, put SwiftUI in UICollectionView/UITableView cells via UIHostingConfiguration, or build a widget / Live Activity. Wrap UIKit for use in SwiftUI -- UIViewRepresentable / UIViewControllerRepresentable with a Coordinator for delegates and data sources. Pass data and state across the boundary (init params, @Binding, closures, environment/trait forwarding), fix hosting-controller sizing, and migrate a UIKit AppDelegate/SceneDelegate app incrementally to the SwiftUI App lifecycle. Trigger even when the user doesn't say "interop" -- e.g. "show this SwiftUI screen from my view controller", "use my UIKit map view in SwiftUI", "put SwiftUI in a collection view cell". Do NOT use for pure SwiftUI view code (swiftui-expert), app architecture / composition root (ios-architecture-expert), or general Swift language questions (swift-language-expert).