Swiftui Patterns

If you're building SwiftUI apps targeting iOS 17+, this gives Claude the modern patterns: @Observable instead of ObservableObject, @Bindable for two-way binding, and .task for async work that auto-cancels. It includes a solid decision table for when to use @State vs @Bindable vs @Environment, plus reference guides for MVVM architecture, NavigationStack, UIKit interop, and accessibility. The "Common Mistakes" section is worth the price of admission alone, calling out things like NavigationPath corruption and UIKit memory leaks. Honestly just a well-organized cheat sheet for the iOS 17 SwiftUI rewrite that saves you from Stack Overflow rabbit holes.

skills.sh installs: 260
GitHub stars: 233
last updated: Aug 21, 2026

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$ npx -y skills add johnrogers/claude-swift-engineering --skill swiftui-patterns --agent claude-code

Installs into .claude/skills of the current project.

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SwiftUI Patterns (iOS 17+)

SwiftUI 17+ removes ObservableObject boilerplate with @Observable, simplifies environment injection with @Environment, and introduces task-based async patterns. The core principle: use Apple's modern APIs instead of reactive libraries.

Overview

Quick Reference

Need	Use (iOS 17+)	NOT
Observable model	`@Observable`	`ObservableObject`
Published property	Regular property	`@Published`
Own state	`@State`	`@StateObject`
Passed model (binding)	`@Bindable`	`@ObservedObject`
Environment injection	`environment(_:)`	`environmentObject(_:)`
Environment access	`@Environment(Type.self)`	`@EnvironmentObject`
Async on appear	`.task { }`	`.onAppear { Task {} }`
Value change	`onChange(of:initial:_:)`	`onChange(of:perform:)`