swift-concurrency

Guide Swift developers through actors, isolation, and structured concurrency for Swift 6 migration.

16|2|Updated Jan 1, 2026
One-click install
npx skills add https://github.com/nonameplum/agent-skills --skill swift-concurrency-nonameplum
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: swift-concurrency
Source: https://github.com/nonameplum/agent-skills/tree/main/swift-concurrency
Command: npx skills add https://github.com/nonameplum/agent-skills --skill swift-concurrency-nonameplum

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides expert guidance on Swift Concurrency to help developers design safe, scalable, and maintainable async code using actors, isolation, and structured concurrency.

Core Features & Use Cases

  • Guidance on concurrency models (actors, @MainActor, global actors) and Sendable conformance for cross-thread data sharing.
  • Migration and debugging strategies for adopting Swift 6 strict concurrency, including planning and verification steps.
  • Practical patterns and decision trees for common scenarios (async data fetch, Task groups, reentrancy), with a real-world migration example.

Quick Start

  • Ask for guidance on a Swift concurrency issue, e.g., "How do I migrate a codebase to Swift 6 with strict concurrency?"

Frequently Asked Questions about swift-concurrency

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

FAQPage Schema
How do I migrate an existing codebase to Swift 6 strict concurrency?

Migrate to Swift 6 strict concurrency by following a structured plan that analyzes code, verifies safe data access across actors, applies recommended patterns, and tests concurrency changes incrementally.

How does actor isolation work for safe data access in Swift?

Actor isolation in Swift protects state by restricting access to its mutable data, ensuring safe data access across actors and preventing data races when sharing information across threads.

What are the best patterns for structured concurrency and async data fetching?

The best structured concurrency patterns involve using task groups and actors to manage async data fetch operations, while applying specific decision trees to handle common scenarios like reentrancy safely.

Can I use this guidance for debugging Swift concurrency issues in any project size?

Yes, you can use this Swift concurrency guidance for any project from early prototyping stages through full Swift 6 migration, as it covers project settings, debugging strategies, and concrete verification steps.

Why do I need Sendable conformance for cross-thread data sharing in Swift?

Sendable conformance is required for cross-thread data sharing in Swift because it guarantees the data type is safe to pass across actors and concurrent contexts without introducing data races.