A collection of agent skills for building and evaluating apps across every major platform. Each 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 (a compiled PDF version is included in this repo) and distilling it — along with Material Design 3 and WCAG 2.2 — into succinct but exhaustive skill files. Use them to evaluate, improve, or create your designs.
Apple Human Interface Guidelines for iPhone. 50+ rules covering navigation, layout, accessibility, gestures, and iOS-specific components like tab bars, sheets, and Dynamic Island.
Use when:
- Building SwiftUI or UIKit interfaces for iPhone
- Reviewing iOS app code for HIG compliance
- Choosing between iOS navigation patterns
- Implementing accessibility, Dark Mode, Dynamic Type
Apple HIG for iPad, covering multitasking, pointer support, sidebar navigation, keyboard shortcuts, and Stage Manager. Extends the iOS skill with iPad-specific patterns.
Use when:
- Building iPad-optimized interfaces
- Implementing Split View, Slide Over, Stage Manager support
- Adding pointer/trackpad and keyboard shortcut support
- Designing responsive layouts for iPad screen sizes
Apple HIG for Mac apps. Covers menu bars, window management, toolbars, keyboard-driven interaction, and the expectations of desktop power users.
Use when:
- Building macOS apps with SwiftUI or AppKit
- Implementing menu bars, toolbars, and sidebars
- Adding keyboard shortcuts and window management
- Designing for Catalyst or native macOS
Apple HIG for Apple Watch. Covers glanceable interfaces, Digital Crown, complications, Always On display, and wrist-optimized interactions.
Use when:
- Building watchOS apps or complications
- Designing for small screens and short interactions
- Implementing health/fitness features on Watch
Apple HIG for Apple Vision Pro. Covers spatial UI, eye and hand input, windows, volumes, immersive spaces, and ornaments.
Use when:
- Building visionOS apps with RealityKit or SwiftUI
- Designing for spatial computing and indirect gestures
- Implementing immersive experiences
Apple HIG for Apple TV. Covers focus-based navigation, Siri Remote, Top Shelf, and living room viewing distances.
Use when:
- Building tvOS apps
- Implementing focus-based navigation with Siri Remote
- Designing for 10-foot viewing experiences
Google Material Design 3 guidelines for Android. Covers Material You, dynamic color, navigation patterns, components, and Android-specific patterns.
Use when:
- Building Android apps with Jetpack Compose or XML layouts
- Reviewing Android code for Material Design compliance
- Implementing Material You and dynamic color
- Choosing between Android navigation patterns
Web platform best practices covering responsive design, accessibility (WCAG), performance, progressive enhancement, and modern CSS/HTML patterns.
Use when:
- Building web interfaces with any framework
- Auditing sites for accessibility compliance
- Implementing responsive, performant web layouts
- Reviewing web UI code for best practices
npx skills add ehmo/platform-design-skillsSkills activate automatically when agents detect platform-relevant tasks.
Review this SwiftUI view for iOS HIG compliance
Check this Android Compose screen against Material Design
Audit this web page for accessibility
Each skill contains:
SKILL.md— Agent instructions with frontmatter metadatametadata.json— Version, references, and abstractrules/— Individual rule files with examplesAGENTS.md— Quick context for agent consumption
- Apple Human Interface Guidelines (2025) — developer.apple.com/design/human-interface-guidelines
- Material Design 3 — m3.material.io
- Web Content Accessibility Guidelines (WCAG) 2.2 — w3.org/WAI/WCAG22/quickref
- MDN Web Docs — developer.mozilla.org
MIT