migrating-to-swift-concurrency
Provides the complete Swift Concurrency Migration Guide. Use when migrating to Swift 6, resolving data-race safety errors, understanding Sendable and actor isolation, or incrementally adopting async/await.
When & Why to Use This Skill
This Claude skill provides a comprehensive technical guide for migrating projects to Swift 6, focusing on data-race safety and modern concurrency patterns. It serves as an essential resource for developers to resolve complex compiler errors, understand Sendable protocols, and implement actor isolation to ensure thread-safe code execution in Apple-platform development.
Use Cases
- Migrating legacy Swift 5 projects to the Swift 6 language mode to enable full data-race safety checking.
- Identifying and resolving common concurrency-related compiler errors such as Sendable violations and actor isolation mismatches.
- Implementing incremental adoption of async/await and structured concurrency within existing large-scale codebases.
- Referencing best practices for library evolution and maintaining source compatibility while updating concurrency annotations.
- Learning the fundamental concepts of Swift's memory safety guarantees through curated documentation and practical code examples.
| name | migrating-to-swift-concurrency |
|---|---|
| description | Provides the complete Swift Concurrency Migration Guide. Use when migrating to Swift 6, resolving data-race safety errors, understanding Sendable and actor isolation, or incrementally adopting async/await. |
Swift Concurrency Migration Guide
The complete content of the Swift Concurrency Migration Guide by Apple. This guide helps you migrate your code to take advantage of Swift's data-race safety guarantees and the Swift 6 language mode.
Documentation
- Data Race Safety (Guide/DataRaceSafety.md): Learn about the fundamental concepts Swift uses to enable data-race-free
- Migration Strategy (Guide/MigrationStrategy.md): Get started migrating your project to the Swift 6 language mode.
- Enable data-race safety checking (Guide/EnableDataRaceSafety.md): Use Swift 6 to get full data-race safety checking or add checking to an existing Swift 5 project.
- Common Compiler Errors (Guide/CommonProblems.md): Identify, understand, and address common problems you can encounter while
- Incremental Adoption (Guide/IncrementalAdoption.md): Learn how you can introduce Swift concurrency features into your project
- Migrating to upcoming language features (Guide/FeatureMigration.md): Migrate your project to upcoming language features.
- Source Compatibility (Guide/SourceCompatibility.md): See an overview of potential source compatibility issues.
- Library Evolution (Guide/LibraryEvolution.md): Annotate library APIs for concurrency while preserving source and ABI
- Runtime Behavior (Guide/RuntimeBehavior.md): Learn how Swift concurrency runtime semantics differ from other runtimes you may
Code Examples
Swift source files demonstrating migration patterns and concurrency concepts:
- Boundaries.swift (Examples/Boundaries.swift): Example code demonstrating Boundaries.
- ConformanceMismatches.swift (Examples/ConformanceMismatches.swift): Example code demonstrating ConformanceMismatches.
- DispatchQueue_PendingWork.swift (Examples/DispatchQueue_PendingWork.swift): Example code demonstrating DispatchQueue PendingWork.
- Globals.swift (Examples/Globals.swift): Example code demonstrating Globals.
- IncrementalMigration.swift (Examples/IncrementalMigration.swift): Example code demonstrating IncrementalMigration.
- PreconcurrencyImport.swift (Examples/PreconcurrencyImport.swift): Example code demonstrating PreconcurrencyImport.
- main.swift (Examples/main.swift): Example code demonstrating main.
Usage Notes
- Start with Data Race Safety to understand the core concepts
- Follow the Migration Strategy for a recommended approach
- Refer to Common Problems for solutions to typical issues
- Use the Code Examples as reference implementations
License & Attribution
Content License
The documentation and example code in this skill are from the Swift Concurrency Migration Guide, copyright Apple Inc. and the Swift project authors, distributed under the Apache 2.0 License.
Skill Structure License
The structure and organization of this skill (this index file) is copyright Kyle Hughes, distributed under the MIT License.