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swift-concurrency

Teach Swift 6 strict async/await, actors, and MainActor isolation.

Updated Aug 27, 2026
Search Tags:#concurrency#swift#async/await#actors#sendable#MainActor
One-click install
npx skills add https://github.com/bluewaves-creations/bluewaves-skills --skill swift-concurrency-bluewaves-creations
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-concurrency
Source: https://github.com/bluewaves-creations/bluewaves-skills/tree/main/plugins/swift-apple-dev/skills/swift-concurrency
Command: npx skills add https://github.com/bluewaves-creations/bluewaves-skills --skill swift-concurrency-bluewaves-creations

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill guides developers in building safe, scalable Swift 6 concurrency code by teaching strict async/await usage, actor isolation, and MainActor semantics.

Core Features & Use Cases

  • Isolating state with Actors: Protect shared data with actor isolation and Sendable types.
  • Structured concurrency patterns: Use async/await, task groups, and cancellation to manage parallel work.
  • UI responsiveness: Leverage MainActor for UI updates and predictable threading behavior.
  • Migration guidance: Convert GCD-based code to structured concurrency with safer patterns.

Quick Start

Create a small Swift package that defines an Actor-based counter, then spawn multiple tasks that increment the counter concurrently. Observe that the final value remains consistent and free of data races.

Frequently Asked Questions about swift-concurrency

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

FAQPage Schema
What is the best way to migrate GCD code to async/await in Swift 6?▼

Swift 6 concurrency prevents data races by using actor isolation to protect shared state and Sendable types, ensuring safe data sharing across asynchronous tasks without traditional locks.

How do I use MainActor to update the UI from an async task?▼

MainActor isolation ensures UI updates run on the main thread, allowing you to leverage MainActor for predictable threading behavior and responsive UIs when executing async tasks in Swift 6.

Does Swift 6 strict concurrency require Sendable types for cross-task data sharing?▼

Swift 6 strict concurrency requires Sendable conformance for types crossing actor boundaries, ensuring safe concurrent execution and preventing data races when sharing data between structured async tasks.

Can I use task groups and cancellation for parallel work in iOS apps?▼

Task groups and cancellation manage parallel work in iOS apps by enabling structured concurrency patterns, allowing you to spawn multiple tasks concurrently and safely cancel them when needed.

What Xcode and Swift versions are needed for strict concurrency checking?▼

Strict concurrency checking requires Swift 6.x with strict concurrency enabled and Xcode 26+, applying to iOS, macOS, and cross-platform Swift projects to ensure safe concurrent code.

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