swift-concurrency

Guide async/await, actors, and Sendable for Swift concurrency code.

62|5|Updated Jan 21, 2026
One-click install
npx skills add https://github.com/Joannis/claude-skills --skill swift-concurrency-joannis
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: swift-concurrency
Source: https://github.com/Joannis/claude-skills/tree/main/swift-concurrency
Command: npx skills add https://github.com/Joannis/claude-skills --skill swift-concurrency-joannis

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers write safe, scalable Swift concurrency code by providing expert guidance on async/await, actors, and Sendable, reducing data races and complexity.

Core Features & Use Cases

  • Practical patterns for structured concurrency, task groups, AsyncSequence, and actor isolation
  • Migration guidance for Swift 6 and strict concurrency checks, including @MainActor usage and global actors
  • Real-world examples across server-side Swift and UI applications to build robust, concurrent systems

Quick Start

Ask the AI to convert a synchronous Swift function into an async version using structured concurrency and actor isolation.

Frequently Asked Questions about swift-concurrency

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I migrate my Swift code to async/await and avoid data races?

To migrate to async/await and avoid data races, you apply structured concurrency, actor isolation, and Sendable conformance. This approach enforces thread safety by restricting mutable state access, ensuring safe cross-actor interactions across server-side Swift and UI apps.

What is the best way to use actors for thread safety in Swift concurrency?

Actors in Swift concurrency provide thread safety by serializing access to their mutable state, preventing data races. You isolate state within an actor and use async/await for cross-actor interactions, which enforces safe, synchronized data access without explicit locks.

How do I convert a synchronous Swift function to structured concurrency?

You convert a synchronous Swift function to structured concurrency by refactoring it into an async version. This involves utilizing task groups, AsyncSequence, and actor isolation to manage concurrent execution safely while maintaining a clear, hierarchical task structure.

Does Swift concurrency migration support server-side Swift and UI applications?

Yes, Swift concurrency migration supports both server-side Swift and UI applications. It provides real-world examples for building robust concurrent systems, utilizing @MainActor for UI updates and global actors to safely manage execution contexts across different platforms.

Why am I getting strict concurrency check warnings during Swift 6 migration?

Strict concurrency check warnings during Swift 6 migration occur when the compiler detects potential data races or unsafe cross-actor interactions. You resolve these by ensuring Sendable conformance, applying actor isolation, and properly annotating global actors like @MainActor.