swift-concurrency-6-2

Migrate Swift projects to 6.2 with MainActor default isolation and @concurrent.

1|Updated Jan 23, 2026

Search Tags:#migration #concurrency #swift #async #actor-isolation #mainactor

Ready to run

npx skills add https://github.com/Mark393295827/house-maint-ai --skill swift-concurrency-6-2-mark393295827

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: swift-concurrency-6-2
Source: https://github.com/Mark393295827/house-maint-ai/tree/main/skills/swift-concurrency-6-2
Command: npx skills add https://github.com/Mark393295827/house-maint-ai --skill swift-concurrency-6-2-mark393295827

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Swift 6.2 introduces concurrency features like MainActor default isolation and explicit @concurrent behavior, which can lead to data-race pitfalls without proper guidance. This Skill provides a structured approach to adopting Approachable Concurrency in Swift 6.2.

Core Features & Use Cases

Single-threaded by default: reduces data races by default.
Isolated conformances: enables MainActor-safe protocol conformance.
Explicit concurrency with @concurrent: for CPU-intensive tasks when needed.
MainActor default inference: reduces boilerplate in app targets.
Migration guidance: practical steps to adopt Swift 6.2 concurrency progressively.

Quick Start

Enable MainActor default inference in your Swift project and annotate performance-critical methods with @concurrent where appropriate.

Frequently Asked Questions about swift-concurrency-6-2

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

FAQPage Schema

How do I migrate my Swift project to avoid data races with the new concurrency model?▼

To migrate your Swift project and avoid data races, adopt Approachable Concurrency by keeping async work on the caller's actor by default, enabling isolated conformances, and following progressive migration steps to Swift 6.2.

What does MainActor default isolation do in Swift 6.2?▼

MainActor default isolation in Swift 6.2 makes app targets single-threaded by default to reduce data races, significantly reducing boilerplate while ensuring safe protocol conformances without explicit annotations.

When should I use @concurrent in my Swift code?▼

You should use the @concurrent attribute in Swift when annotating performance-critical methods for CPU-intensive tasks that require explicit concurrency outside the default actor-isolated execution.

Does Swift 6.2 support isolated conformances for MainActor-safe protocols?▼

Yes, Swift 6.2 supports isolated conformances, enabling MainActor-safe protocol conformances that keep async operations on the caller's actor by default to prevent data races during migration.

What is the best way to enable MainActor default inference in an existing Swift app?▼

The best way to enable MainActor default inference is to activate it in your Swift project settings and annotate only CPU-heavy methods with @concurrent, adopting Swift 6.2 concurrency progressively through structured migration steps.

Why does my Swift async code have data race safety issues after upgrading?▼

Your Swift async code has data race safety issues because new concurrency features like MainActor default isolation require proper guidance; applying isolated conformances and keeping async work on the caller's actor resolves these pitfalls.