swiftui-expert-skill
Use when writing, reviewing, or refactoring SwiftUI code for iOS or macOS, including state and @Observable data flow, view composition, resizable layouts, safe areas, display scale, performance, lists, environment, localization, animation, Liquid Glass, and API migration. Also use for iPhone Duo, foldable, or large-display layouts (NavigationSplitView on large displays, iPhone tab sidebar, two-column reflow, foldable grids, ArrangementView, ReservedRegion), hinge effects, vertical bars, @State initialization or synthesized-property diagnostics, @ContentBuilder ambiguity, reorderable drag/drop, custom AsyncImage URLSession, swipe actions outside List, item-bound alert/confirmationDialog, ToolbarOverflowMenu, AnimatableValues, Document APIs (Document/DocumentReader), and Instruments .trace capture or analysis.
