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swift-concurrency-6-2

Guide Swift 6.2 concurrency migration with MainActor defaults and isolated conformances.

3|2|Updated Mar 8, 2026
Search Tags:#isolation#migration#concurrency#swift#async#mainactor
One-click install
npx skills add https://github.com/agentmatters/mullai-bot --skill swift-concurrency-6-2-agentmatters
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-concurrency-6-2
Source: https://github.com/agentmatters/mullai-bot/tree/main/src/Mullai.Skills/Skills/claude-code-everything/swift-concurrency-6-2
Command: npx skills add https://github.com/agentmatters/mullai-bot --skill swift-concurrency-6-2-agentmatters

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Swift developers often struggle with concurrency safety in Swift 6.2, leading to data races and boilerplate when migrating codebases to new concurrency patterns.

Core Features & Use Cases

  • Single-threaded by default: reduce data races by keeping most code on the calling thread unless explicitly offloaded.
  • Isolated conformances: safely adopt protocol conformance for MainActor types without unsafe wrappers.
  • Explicit concurrency primitives: opt-in with @concurrent for CPU-intensive tasks and background work.
  • Migration guidance: step-by-step migration steps and best practices to adopt App-level concurrency safely.

Quick Start

Enable Swift 6.2 concurrency defaults in your project and start migrating isolated components step by step.

Frequently Asked Questions about swift-concurrency-6-2

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

FAQPage Schema
What is MainActor default inference in Swift 6.2 concurrency?▼

Swift 6.2 concurrency defaults make code single-threaded by keeping execution on the calling thread unless explicitly offloaded. This MainActor default inference reduces data races and boilerplate during migration.

How do I migrate my Swift app to 6.2 concurrency safely?▼

To migrate your Swift app to 6.2 concurrency, follow step-by-step guidance to adopt App-level concurrency defaults, migrate isolated components individually, and implement isolated conformances for actor-based architectures safely.

When should I use the @concurrent attribute in Swift?▼

Use the @concurrent attribute in Swift 6.2 to explicitly opt-in to concurrency for CPU-intensive tasks and background work. It offloads execution from the default single-threaded calling context.

How do isolated conformances work for MainActor types in Swift?▼

Isolated conformances in Swift allow MainActor types to safely adopt protocol conformance without unsafe wrappers. They ensure protocol requirements execute within the correct actor isolation context for actor-based architectures.

Can I enable Swift 6.2 concurrency defaults for existing codebases?▼

Yes, you can enable Swift 6.2 concurrency defaults in existing projects. The migration process involves adopting App-level concurrency safely and moving isolated components step by step to ensure data race safety.

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