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swift6-concurrency-migration

Migrate Swift code to Swift 6 strict concurrency by resolving Sendable and actor-isolation diagnostics.

Updated Feb 28, 2026
Search Tags:#concurrency#swift 6#swift#async#sendable#mainactor#actor isolation
One-click install
npx skills add https://github.com/trancee/noise-protocol --skill swift6-concurrency-migration
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swift6-concurrency-migration
Source: https://github.com/trancee/noise-protocol/tree/main/.github/skills/swift6-concurrency-migration
Command: npx skills add https://github.com/trancee/noise-protocol --skill swift6-concurrency-migration

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers safely and incrementally migrate their Swift codebases towards Swift 6's strict concurrency model, resolving common diagnostics like Sendable errors, actor-isolation violations, and MainActor issues.

Core Features & Use Cases

  • Diagnostic Resolution: Fixes concurrency-related compiler errors and warnings.
  • Incremental Adoption: Guides a staged migration across modules or targets.
  • Use Case: You have a large iOS application with many concurrency warnings after enabling stricter checking. This Skill can help you systematically address these issues, ensuring your code is ready for Swift 6 without breaking existing functionality.

Quick Start

Use the swift6-concurrency-migration skill to fix Sendable errors in the attached Swift file.

Frequently Asked Questions about swift6-concurrency-migration

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

FAQPage Schema
How do I fix Swift 6 concurrency errors like Sendable and actor isolation violations?▼

Yes, you can adopt Swift 6 strict concurrency incrementally by staging migration across modules or targets. This approach analyzes and corrects concurrency diagnostics systematically, ensuring your codebase transitions safely without breaking existing functionality.

What is the best way to migrate a large iOS application to Swift 6 strict concurrency?▼

The best way to migrate a large iOS application to Swift 6 strict concurrency is a staged adoption process. Systematically address concurrency warnings and errors module by module to ensure existing functionality remains intact throughout the migration.

Why does Swift 6 report MainActor issues and how do I resolve them?▼

Swift 6 reports MainActor issues when UI-related code lacks proper actor isolation annotations. Resolve them by applying MainActor conformances or adjusting async boundaries to ensure safe cross-actor data access under strict concurrency checking.

Can I migrate my Swift codebase to Swift 6 language mode without breaking existing async functions?▼

Yes, migrating to Swift 6 language mode can preserve existing async functions by resolving concurrency diagnostics safely. Analyzing Sendable constraints and actor isolation violations allows incremental correction without disrupting current asynchronous operations.

What are the limitations of incrementally adopting Swift 6 strict concurrency?▼

Incrementally adopting Swift 6 strict concurrency requires careful module-by-module staging to avoid isolation violations leaking across boundaries. Limitations include managing temporary mixed-mode states where strict and less-strict checking coexist during the staged migration process.

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