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expo-ui

Library reference for @expo/ui SwiftUI components on iOS — covers Host boundaries, modifier composition, iOS 26 Liquid Glass and Human Interface Guidelines composition rules, layout/input/navigation/display catalogues, and ObservableState patterns. Use this skill whenever writing or reviewing React Native code that imports from @expo/ui/swift-ui or @expo/ui/swift-ui/modifiers — including new Expo apps adopting native SwiftUI views, migrations from React Native primitives to expo-ui, and code targeting iOS 26 features (Liquid Glass, GlassEffectContainer, sheet detents). Trigger even if the user does not explicitly mention "expo-ui" but is writing iOS-targeted Expo UI code that should bridge to SwiftUI.

skills/.curated/expo-ui/SKILL.md

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# Expo @expo/ui SwiftUI Best Practices

Library reference for `@expo/ui/swift-ui` and `@expo/ui/swift-ui/modifiers` — the iOS surface of Expo's native UI bridge. Contains 53 rules across 8 categories, prioritised by cascade impact for agents building Expo apps that render to native SwiftUI views on iOS 26 and earlier.

## When to Apply

Reference these guidelines when:

- Building a new screen with `@expo/ui/swift-ui` — pick the right container (Form vs List vs ScrollView), wrap in Host correctly, apply modifiers
- Migrating from React Native primitives (View, Text, TouchableOpacity) to native SwiftUI components
- Targeting iOS 26 features — Liquid Glass material, GlassEffectContainer, new sheet detent behaviours
- Reviewing code that imports from `@expo/ui/swift-ui` or `@expo/ui/swift-ui/modifiers`
- Debugging "the SwiftUI view doesn't render / is the wrong size / ignores styles" — usually a Host or modifier issue
- Composing presentation surfaces — Alert, ConfirmationDialog, BottomSheet, Popover — under HIG modality guidance