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swift-concurrency-6-2

Migrate Swift code to Swift 6.2 concurrency with MainActor defaults and @concurrent.

Updated Mar 24, 2026
Search Tags:#migration#concurrency#swift#xcode#data-race#mainactor#approachable-concurrency
One-click install
npx skills add https://github.com/Oruga420/claude-code-skills --skill swift-concurrency-6-2-oruga420
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-concurrency-6-2
Source: https://github.com/Oruga420/claude-code-skills/tree/main/swift-concurrency-6-2
Command: npx skills add https://github.com/Oruga420/claude-code-skills --skill swift-concurrency-6-2-oruga420

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Migrate Swift codebases to Swift 6.2's approachable concurrency model to eliminate surprising implicit background offloading and prevent compile-time and runtime data races while preserving performance.

Core Features & Use Cases

  • Single-threaded-by-default patterns: Guidance on writing code that stays on the calling actor and avoids accidental cross-thread access.
  • Isolated conformances: How to safely declare MainActor-isolated protocol conformances and where those conformances are valid.
  • Explicit background offload via @concurrent: When and how to mark expensive, CPU-bound functions for parallel execution while protecting shared state.
  • Migration & build guidance: Steps for enabling MainActor default inference, required Xcode/SPM settings, and testing strategies for incremental adoption.
  • Use case example: Converting UI-centric image processing pipelines to stay on MainActor by default and only offload heavy extraction tasks with @concurrent.

Quick Start

Use the swift-concurrency-6-2 skill to audit a Swift 6.1 codebase, enable MainActor defaults, and identify functions to mark with @concurrent to resolve data-race errors.

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 codebase to prevent data races with approachable concurrency?▼

To prevent data races using approachable concurrency, migrate your Swift codebase by enabling MainActor defaults to ensure single-threaded-by-default execution, then selectively mark CPU-bound functions with @concurrent for explicit background offloading.

What is Swift 6.2 approachable concurrency and how does it change MainActor isolation?▼

Swift 6.2 approachable concurrency introduces single-threaded-by-default execution and isolated protocol conformances for MainActor types, preventing surprising implicit background offloading and eliminating cross-thread data races while preserving performance.

How do I use @concurrent to offload background tasks in Swift?▼

Use the @concurrent attribute in Swift 6.2 to explicitly mark expensive, CPU-bound functions like image processing for parallel background execution, ensuring shared state remains protected while isolating default execution to the calling actor.

Do I need specific Xcode settings to enable MainActor default inference for Swift migration?▼

Yes, enabling MainActor default inference requires specific Xcode 26 or SwiftSettings opt-ins during your Swift 6.2 migration, allowing you to incrementally adopt isolated conformances and resolve data-race errors safely.

Why does my Swift 6.1 code have implicit background offloading issues after migration?▼

Implicit background offloading issues occur because Swift 6.2 approachable concurrency shifts to single-threaded-by-default execution, requiring you to explicitly define background execution with @concurrent rather than relying on prior Swift 5.x or 6.0 concurrency behaviors.

Can I use Swift 6.2 concurrency for MainActor-centric UI apps with heavy image processing?▼

Yes, Swift 6.2 concurrency suits MainActor-centric UI apps by keeping execution on the MainActor by default, allowing you to safely offload heavy extraction or compression tasks using @concurrent to prevent data races without blocking the UI.

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