Expert guidance for any AI coding tool that supports the Agent Skills open format — SwiftUI state management, view composition, performance, and iOS 26+ Liquid Glass adoption.

This repository distills practical SwiftUI best practices into actionable, concise references for agents and code review workflows.

• Teams adopting modern SwiftUI APIs who want quick, correct defaults
• Developers reviewing or refactoring SwiftUI views and data flow
• Anyone shipping performant lists, scrolling, sheets, and navigation in SwiftUI

• Swift Concurrency Expert
• Core Data Expert
• Swift Testing Expert

Install this skill with a single command:

npx skills add https://github.com/avdlee/swiftui-agent-skill --skill swiftui-expert-skill

For more information, visit the skills.sh platform page.

Then use the skill in your AI agent, for example:

Use the swiftui expert skill and review the current SwiftUI code for state-management and performance improvements

To install this Skill for your personal use in Claude Code:

1. Add the marketplace:

/plugin marketplace add AvdLee/SwiftUI-Agent-Skill

2. Install the Skill:

/plugin install swiftui-expert@swiftui-expert-skill

To automatically provide this Skill to everyone working in a repository, configure the repository's .claude/settings.json:

{
  "enabledPlugins": {
    "swiftui-expert@swiftui-expert-skill": true
  },
  "extraKnownMarketplaces": {
    "swiftui-expert-skill": {
      "source": {
        "source": "github",
        "repo": "AvdLee/SwiftUI-Agent-Skill"
      }
    }
  }
}

When team members open the project, Claude Code will prompt them to install the Skill.

1. Clone this repository.
2. Install or symlink the swiftui-expert-skill/ folder following your tool’s official skills installation docs (see links below).
3. Use your AI tool as usual and ask it to use the “swiftui-expert” skill for SwiftUI tasks.

Follow your tool’s official documentation, here are a few popular ones:

• Codex: Where to save skills
• Claude: Using Skills
• Cursor: Enabling Skills

How to verify:

Your agent should reference the workflow/checklists in swiftui-expert-skill/SKILL.md and jump into the relevant reference file for your task.

This skill gives your AI coding tool practical SwiftUI guidance. It can:

• Choose the right state management tool (@State, @Binding, @Observable, @Bindable)
• Provide clear guidance for sheets, navigation, scrolling, and lists
• Advise on iOS 26+ Liquid Glass usage with safe availability fallbacks

• Keep view identity stable (e.g. avoid common ForEach pitfalls)
• Improve view composition for readability and efficient diffing
• Avoid common update/refresh pitfalls that cause unnecessary re-renders

• Reduce redundant state updates in hot paths
• Improve list performance via stable identity and consistent row structure
• Suggest image downsampling when UIImage(data:) is encountered (as an optional optimization)

Non-Opinionated: Focuses on SwiftUI correctness, not forcing an architecture, project structure, or code style.

Practical & concise: Treats the agent as capable; provides the checklists and pitfalls that actually matter in day-to-day SwiftUI work.

swiftui-expert-skill/
  SKILL.md
  references/
    accessibility-patterns.md - Accessibility traits, grouping, Dynamic Type, and VoiceOver
    animation-advanced.md - Performance, interpolation, and complex animation chains
    animation-basics.md - Core animation concepts, implicit/explicit animations, timing
    animation-transitions.md - View transitions, matchedGeometryEffect, and state changes
    image-optimization.md - AsyncImage usage, downsampling, caching
    latest-apis.md
    layout-best-practices.md - Layout patterns and GeometryReader alternatives
    liquid-glass.md - iOS 26+ glass effects and fallback patterns
    list-patterns.md - ForEach identity and list performance
    performance-patterns.md - Hot-path optimizations and update control
    scroll-patterns.md - ScrollViewReader and programmatic scrolling
    sheet-navigation-patterns.md - Sheets and type-safe navigation
    state-management.md - Property wrapper selection and data flow
    view-structure.md - View extraction and composition patterns

The repository includes a maintenance skill for keeping API guidance current:

.agents/skills/update-swiftui-apis/
  SKILL.md               - Workflow for scanning Apple docs and updating latest-apis.md
  references/
    scan-manifest.md     - Categorized API areas, doc paths, and search queries to scan

Use this skill after new iOS or Xcode releases to refresh the deprecated API reference. It requires the Sosumi MCP to be available. See AGENTS.md or CONTRIBUTING.md for details.

Contributions are welcome! This repository follows the Agent Skills open format, which has specific structural requirements.

Please read CONTRIBUTING.md for:

• How to contribute improvements to SKILL.md and the reference files
• Format requirements and quality standards
• Pull request process

Several SwiftUI guidelines in this skill were inspired by or derived from the following works:

• Skills by Thomas Ricouard — a collection of SwiftUI-focused Codex skills covering UI patterns, performance auditing, and Liquid Glass.
• SwiftLee SwiftUI articles and Swift articles by Antoine van der Lee — practical SwiftUI best practices covering state management, accessibility, view composition, performance debugging, image optimization, and more.

Created by Antoine van der Lee and Omar Elsayed. With years of experience in Swift & SwiftUI, this skill distills practical knowledge into actionable guidance for AI assistants. Antoine published tens of articles on SwiftUI on his blog called SwiftLee.

• Story behind this skill

This skill is open-source and available under the MIT License. See LICENSE for details.