Platform design guidelines for building and evaluating apps across every major platform. Covers Apple HIG (iOS, iPadOS, macOS, watchOS, visionOS, tvOS), Material Design 3 (Android), and WCAG 2.2 + MDN (Web). Use when building, reviewing, or auditing mobile, desktop, or web interfaces for design compliance.
A collection of platform design skills for building and evaluating apps across every major platform. Each sub-skill encodes the official design guidelines -- from Apple's Human Interface Guidelines to Google's Material Design to web standards -- into actionable rules AI agents can apply during code generation, review, and refactoring.
Built by scraping the Apple Human Interface Guidelines, Material Design 3, and WCAG 2.2 then distilling them into succinct but exhaustive skill files.
Source: ehmo/platform-design-skills
mobile-design/
|-- SKILL.md # This file - master entry point
|
|-- i-os/
| |-- i-os.md # iPhone (Apple HIG) - 50+ rules
|
|-- ipad-os/
| |-- ipad-os.md # iPad (Apple HIG) - 35+ rules
|
|-- mac-os/
| |-- mac-os.md # Mac (Apple HIG) - 50+ rules
|
|-- watch-os/
| |-- watch-os.md # Apple Watch (Apple HIG) - 34 rules
|
|-- vision-os/
| |-- vision-os.md # Apple Vision Pro (Apple HIG) - 44 rules
|
|-- tv-os/
| |-- tv-os.md # Apple TV (Apple HIG) - 34 rules
|
|-- android/
| |-- android.md # Android (Material Design 3) - 50+ rules
|
|-- web/
| |-- web.md # Web (WCAG 2.2 + MDN) - 60+ rules
Each platform file is a single, self-contained reference that merges the full design guidelines, metadata, agent context, and section index into one document.
| Sub-skill | Platform | Source | Guidelines Scope |
|---|---|---|---|
i-os | iPhone | Apple HIG | 50+ rules: navigation, layout, accessibility, gestures, Dynamic Island |
ipad-os | iPad | Apple HIG | 35+ rules: multitasking, pointer, keyboard, Apple Pencil, Stage Manager |
mac-os | Mac | Apple HIG | 50+ rules: menu bars, windows, toolbars, keyboard-driven, desktop UX |
watch-os | Apple Watch | Apple HIG | 34 rules: glanceable design, Digital Crown, complications, Always On |
vision-os | Apple Vision Pro | Apple HIG | 44 rules: spatial layout, eye/hand input, volumes, immersive spaces |
tv-os | Apple TV | Apple HIG | 34 rules: focus navigation, Siri Remote, 10-foot UI, Top Shelf |
android | Android | Material Design 3 | 50+ rules: Material You, dynamic color, Compose, navigation, permissions |
web | Web | WCAG 2.2 + MDN | 60+ rules: accessibility, responsive design, forms, performance, i18n |
Each platform has a single consolidated file containing:
Review this SwiftUI view for iOS HIG compliance
Check this Android Compose screen against Material Design
Audit this web page for accessibility
Evaluate this iPad app for multitasking and pointer support
Review this watchOS complication for glanceable design principles