Can this skill help with SwiftUI development?

Yes, it applies @MainActor isolation and modern property wrapper patterns essential for safe state management in SwiftUI views and ViewModels.

Does this skill support older versions of Swift?

While the skill prioritizes Swift 6+ features and patterns, it includes migration strategies from Swift 5 and utilizes availability markers for backward compatibility.

How does it handle Swift 6 concurrency warnings?

The skill provides specific patterns for Sendable conformance, actor isolation, and nonisolated(unsafe) usage to resolve compiler warnings and ensure data safety.

Does it follow the official Swift API Design Guidelines?

Absolutely. It enforces naming conventions, argument label standards, and clarity-first principles as defined by the Swift.org API Design Guidelines.

Swift 6 Best Practices

Name: Swift 6 Best Practices
Author: sammcj

bysammcj

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Mobile Development

Implements modern Swift 6+ patterns, strict concurrency safety, and idiomatic API design principles for iOS and macOS development.

This skill empowers Claude to write and review Swift code using the latest industry standards, specifically targeting Swift 6 and macOS 15.7+. It focuses on the strict concurrency model—including actors, MainActor isolation, and Sendable types—to eliminate data races at compile time. By adhering to official Swift API Design Guidelines, it ensures code is clear, expressive, and maintainable, making it an essential tool for developers migrating legacy Swift 5 codebases or building modern, thread-safe applications from scratch.

Key Features

01Swift 6 strict concurrency checking and region-based isolation

02Swift 6 migration strategies and breaking change resolution

03Modern async/await patterns with structured concurrency and cancellation

04Idiomatic Swift API design and naming convention enforcement

05Actor-based state management and @MainActor UI isolation

0699 GitHub stars

Use Cases

01Refactoring legacy Swift 5 code to meet Swift 6 strict concurrency requirements

02Designing thread-safe public APIs for iOS and macOS frameworks

03Debugging complex data races and Sendable compiler warnings

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add sammcj/agentic-coding swift-best-practices

For use in Claude.ai and ChatGPT

Download Skill