Design & HIG You MUST use this skill for ANY visual design, HIG compliance, Liquid Glass, SF Symbols, typography, or app composition work. Quick Reference | Symptom / Task | Reference | |----------------|-----------| | Design decisions, HIG compliance, colors, backgrounds | See | | Semantic colors, custom color patterns, material styles | See | | Liquid Glass effects, adoption, migration from blur effects | See | | App-wide Liquid Glass adoption, backward compatibility | See | | SF Symbols rendering modes, effects, animations | See | | SF Symbols API signatures, UIKit equivalents, availabilit…