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swift-concurrency-6-2

Guide Swift 6.2 migrations by resolving data-race issues and configuring @concurrent offloading.

Updated Aug 23, 2026
Search Tags:#migration#concurrency#swift#xcode#data-race#mainactor#concurrency-patterns
One-click install
npx skills add https://github.com/KumarAdi8/AgentKit --skill swift-concurrency-6-2-kumaradi8
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift-concurrency-6-2
Source: https://github.com/KumarAdi8/AgentKit/tree/main/skills/swift-concurrency-6-2
Command: npx skills add https://github.com/KumarAdi8/AgentKit --skill swift-concurrency-6-2-kumaradi8

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Migrating to Swift 6.2 introduces a new default single-threaded-by-default concurrency model that prevents implicit background offloading and reduces data-race compiler errors, but requires changes to actor annotations, isolated conformances, and selective background offloading patterns across codebases.

Core Features & Use Cases

  • Migration Guidance: Step-by-step recommendations for enabling MainActor default inference and SE-0466/SE-0461 settings in Xcode 26 and Package.swift.
  • Concurrency Patterns: Clear patterns for isolated conformances, protecting global/static state with @MainActor, and using @concurrent for deliberate background work.
  • Use Case: Convert an existing Swift 5.x/6.0/6.1 iOS app to Swift 6.2 by fixing compiler-reported data-race issues, annotating actor isolation where appropriate, and offloading CPU-bound workloads after profiling.

Quick Start

Enable MainActor default inference in Xcode 26 and ask for a prioritized list of code changes to resolve data-race compiler errors across the project.

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 iOS app to Swift 6.2 concurrency safely?▼

Swift 6.2 migration requires resolving data-race compiler errors by enabling MainActor default inference, adopting isolated protocol conformances, and selectively offloading CPU-bound workloads using @concurrent functions after profiling.

What is MainActor default inference in Swift 6.2?▼

MainActor default inference is a new Swift 6.2 concurrency model that defaults to a single-threaded execution context, preventing implicit background offloading and reducing data-race errors across your iOS, macOS, and watchOS projects.

How do I configure Xcode 26 build settings for SE-0466 and SE-0461?▼

You enable SE-0466 and SE-0461 compiler modes by updating Xcode 26 build settings and configuring swiftSettings in Package.swift to satisfy the technical requirements for Swift 6.2 concurrency adoption.

When should I use @concurrent functions in Swift async code?▼

Use @concurrent functions for deliberate background offloading of CPU-bound workloads in Swift async code, placing them based on profiling results to avoid implicit background execution issues.

Can I use Swift 6.2 concurrency patterns with existing Swift 5.x projects?▼

Yes, you can convert existing Swift 5.x, 6.0, or 6.1 projects by fixing compiler-reported data-race issues, annotating actor isolation where appropriate, and offloading background work after enabling Xcode 26 settings.

Why does Swift 6.2 produce data-race compiler errors in my async code?▼

Swift 6.2 produces data-race compiler errors because the new single-threaded-by-default concurrency model prevents implicit background offloading, requiring explicit actor annotations and isolated conformances to protect global and static state.

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