Liquid Glass is Apple's next-generation material design system introduced at WWDC 2025. It represents a significant evolution from previous materials (Aqua, iOS 7 blurs, Dynamic Island) by creating a new digital meta-material that:
Core Philosophy: Liquid Glass complements the evolution of rounded, immersive screens with rounded, floating forms that feel natural to touch interaction while letting content shine through.
Liquid Glass defines itself through lensing — warping and bending light to communicate presence, motion, and form. Elements materialize in/out by modulating light bending (not fading). Controls feel ultra-lightweight yet visually distinguishable.
Use when implementing Liquid Glass effects, reviewing UI for Liquid Glass adoption, debugging visual artifacts, optimizing performance, or requesting expert review of Liquid Glass implementation - provides comprehensive design principles, API patterns, and troubleshooting guidance from WWDC 2025. Includes design review pressure handling and professional push-back frameworks Source: megastep/codex-skills.