What problem does it solve? Adopting Apple's iOS 26+ Liquid Glass design system correctly requires knowing which native APIs to use, how to order modifiers, and how to handle availability fallbacks. This Skill guides implementation and review of Liquid Glass UI so features use native glass effects consistently and performantly. ## Core Features & Use Cases - Implementation Guidance: Apply glassEffect, GlassEffectContainer, glass button styles, and morphing transitions with glassEffectID and @Namespace. - Code Review Checklist: Verify availability gating with #available(iOS 26, *), modifier order, container composition, interactivity, and shape consistency. - Fallback Patterns: Provide non-glass fallbacks such as .ultraThinMaterial for earlier iOS versions. - Use Case: When building a new SwiftUI toolbar with multiple glass buttons, wrap them in a GlassEffectContainer, apply .buttonStyle(.glassProminent) to the primary action, and add a material-based fallback for pre-iOS 26 devices. ## Quick Start Use the swiftui-liquid-glass skill to review my SwiftUI view and refactor it to use native Liquid Glass APIs with an iOS 26 availability fallback.