swift-concurrency

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

62|5|Updated Jan 21, 2026

Search Tags:#migration #async-await #actors #sendable #swift-concurrency #thread-safety #structured-concurrency

Ready to run

npx skills add https://github.com/Joannis/claude-skills --skill swift-concurrency-joannis

💬 Prompt for ChatGPT / Claude Chat▼

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.