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swift6-strict-concurrency

Migrate Swift projects to Swift 6 Strict Concurrency with structured plans.

1|1|Updated Jan 17, 2026
Search Tags:#migration#concurrency#swift#xcode#actor#sendable#swift6
One-click install
npx skills add https://github.com/fumiya-kume/toy-poodle-love --skill swift6-strict-concurrency
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift6-strict-concurrency
Source: https://github.com/fumiya-kume/toy-poodle-love/tree/main/.claude/skills/swift6-strict-concurrency
Command: npx skills add https://github.com/fumiya-kume/toy-poodle-love --skill swift6-strict-concurrency

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

Swift projects migrating to Swift 6 Strict Concurrency often face confusion around Sendable conformance, Actor isolation, and build configuration. This skill provides a comprehensive, battle-tested approach to migrate safely with guidance, references, and examples.

Core Features & Use Cases

  • Structured migration plan covering phases from targeted to complete, including configuration changes, code changes, and testing.
  • Reference-rich guidance on Actor isolation, nonisolated, MainActor, Sendable, and migration checklists.
  • Concise quick-start and practical workflows to kick off migration in a real project, with CLI tooling support.

Quick Start

Run the Swift 6 Migration Analyzer to scan your project for strict concurrency hotspots and start the migration plan.

Frequently Asked Questions about swift6-strict-concurrency

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

FAQPage Schema
How do I migrate my Swift project to strict concurrency in Swift 6?▼

Migrating to Swift 6 strict concurrency involves updating build settings, ensuring Sendable conformance, and applying Actor isolation. A step-by-step plan helps transition from targeted to complete concurrency safely.

What is Sendable conformance and when do I need it for Swift 6?▼

Sendable conformance ensures types can be safely passed across concurrent domains. You need it during Swift 6 migration to guarantee thread-safe data sharing and prevent data races in strict concurrency mode.

Does this Swift 6 migration guide support both iOS and macOS targets?▼

Yes, this migration guide enforces practical requirements across both iOS and macOS targets. It provides configuration and code modernization steps tailored for these platforms within Xcode.

What is the best way to start Swift 6 strict concurrency migration?▼

The best way to start is by running a migration analyzer to scan your project for strict concurrency hotspots. This generates a practical workflow and phased plan for safe code modernization.

Why do I need Actor isolation and MainActor in Swift 6?▼

Actor isolation and MainActor are required in Swift 6 to protect state from concurrent access. They define execution boundaries, ensuring safe asynchronous code execution and preventing data races.

What are the limitations of migrating to Swift 6 strict concurrency?▼

Migrating to Swift 6 strict concurrency can be challenging due to complex Actor isolation and Sendable requirements. It requires careful configuration and code modernization across all project targets to avoid build errors.

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