Swift Concurrency

Teach async/await, actors, TaskGroup, and Sendable for Swift concurrency.

1|1|Updated Feb 4, 2026

Search Tags:#concurrency #swift #ios #async/await #actors #sendable #taskgroup

Ready to run

npx skills add https://github.com/arimunandar/claude-code-ios-plugin --skill swift-concurrency-arimunandar

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Swift Concurrency
Source: https://github.com/arimunandar/claude-code-ios-plugin/tree/main/skills/swift-concurrency
Command: npx skills add https://github.com/arimunandar/claude-code-ios-plugin --skill swift-concurrency-arimunandar

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill eliminates the complexity and risks of writing concurrent code in Swift by teaching async/await, actors, TaskGroup, and Sendable to ensure thread-safe and performant iOS applications.

Core Features & Use Cases

Async/await fundamentals: Learn structured concurrency for readable, scalable asynchronous code.
Actors & Sendable: Use actor isolation and Sendable types to protect shared state.
TaskGroup & MainActor: Parallelize work safely and coordinate UI updates on the main thread.
Use Case: Build a data-fetching pipeline that concurrently loads multiple resources and safely aggregates results without data races.

Quick Start

Create a small Swift module that fetches user data concurrently using async/await and TaskGroup, guarded by an actor for shared state.

Frequently Asked Questions about Swift Concurrency

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

FAQPage Schema

How do I use Swift concurrency to prevent data races in iOS apps?▼

Swift concurrency prevents data races by using actor isolation to protect shared mutable state and Sendable types to ensure safe data transfer across concurrent execution contexts.

What's the best way to fetch multiple resources concurrently using async/await?▼

The best way to fetch resources concurrently with async/await is using a TaskGroup to parallelize work safely, aggregate results, and coordinate UI updates on the main thread via @MainActor.

When do I need to use Sendable in my Swift asynchronous code?▼

You need to use Sendable when passing data across concurrent execution boundaries to guarantee thread-safe access and prevent data races within your structured Swift concurrency workflows.

How does actor isolation work for managing shared state in Swift?▼

Actor isolation works by serializing access to an actor's mutable state, ensuring only one task can execute code within the actor at a time, thus enabling safe synchronization without explicit locks.

Can I use TaskGroup to build a concurrent data-fetching pipeline in iOS?▼

Yes, you can use TaskGroup to build a data-fetching pipeline that concurrently loads multiple resources and safely aggregates results without data races by combining it with actors and async/await.

Why does structured concurrency matter for responsive iOS UIs?▼

Structured concurrency matters for responsive iOS UIs because async/await and @MainActor coordinate heavy background tasks efficiently, ensuring UI updates remain safely synchronized on the main thread.