hig-foundations

skill_id	design.ios_hig.hig_foundations
name	hig-foundations
description	Design — Apple Human Interface Guidelines design foundations.
version	v00.33.0
status	ADOPTED
domain_path	design/ios-hig/hig-foundations
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diff_link	diffs/v00_36_0/OPP-133_skill_normalizer
executor	LLM_BEHAVIOR

Apple HIG: Design Foundations

Check for .claude/apple-design-context.md before asking questions. Use existing context and only ask for information not already covered.

Key Principles

1. Prioritize content over chrome. Reduce visual clutter. Use system-provided materials and subtle separators rather than heavy borders and backgrounds.

2. Build in accessibility from the start. Design for VoiceOver, Dynamic Type, Reduce Motion, Increase Contrast, and Switch Control from day one. Every interactive element needs an accessible label.

3. Use system colors and materials. System colors adapt to light/dark mode, increased contrast, and vibrancy. Prefer semantic colors (label, secondaryLabel, systemBackground) over hard-coded values.

4. Use platform fonts and icons. SF Pro, SF Compact, SF Mono by default. New York for serif. Follow the type hierarchy at recommended sizes. Use SF Symbols for iconography.

5. Match platform conventions. Align look and behavior with system standards. Provide direct, responsive manipulation and clear feedback for every action.

6. Respect privacy. Request permissions only when needed, explain why clearly, provide value before asking for data. Design for minimal data collection.

7. Support internationalization. Accommodate text expansion, right-to-left scripts, and varying date/number formats. Use Auto Layout for dynamic content sizing.

8. Use motion purposefully. Animation should communicate meaning and spatial relationships. Honor Reduce Motion by providing crossfade alternatives.

Reference Index

Reference	Topic	Key content
accessibility.md	Accessibility	VoiceOver, Dynamic Type, color contrast, motor accessibility, Switch Control, audio descriptions
app-icons.md	App Icons	Icon grid, platform-specific sizes, single focal point, no transparency