swift-concurrency-expert

Review Swift 6.2+ concurrency usage and fix data-race safety issues.

Updated Feb 11, 2026
One-click install
npx skills add https://github.com/mschuerig/peach-ios --skill swift-concurrency-expert-mschuerig
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: swift-concurrency-expert
Source: https://github.com/mschuerig/peach-ios/tree/main/.agents/skills/swift-concurrency-expert
Command: npx skills add https://github.com/mschuerig/peach-ios --skill swift-concurrency-expert-mschuerig

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps teams review and remediate Swift concurrency usage in Swift 6.2+ projects, addressing data races, actor isolation warnings, and Sendable conformance.

Core Features & Use Cases

  • Review and remediate concurrency issues across codebases.
  • Apply minimal, safe changes like adding @MainActor, migrating completion handlers to async/await, and introducing nonisolated or concurrent functions.
  • Provide migration guidance for both UI-heavy and background code paths.

Quick Start

Provide a Swift file or snippet and I will review its concurrency usage and propose concrete fixes.

Frequently Asked Questions about swift-concurrency-expert

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

FAQPage Schema
How do I fix Swift concurrency data race safety warnings in Swift 6.2?

To fix Swift concurrency data race safety warnings, you can review your Swift 6.2+ code to apply minimal changes like adding @MainActor, ensuring Sendable conformance, and introducing nonisolated functions to resolve actor isolation issues safely.

How do I migrate completion handlers to async/await in Swift?

Migrating completion handlers to async/await involves converting callback-based functions into asynchronous functions. This process targets Swift 6.2+ concurrency features to safely update both UI-heavy and background code paths.

What is the best way to review actor isolation and Sendable conformance in a Swift project?

Reviewing actor isolation and Sendable conformance involves analyzing your Swift codebase to identify data race risks. The process applies minimal, safe changes across UI and non-UI contexts to satisfy compiler diagnostics and migration patterns.

Does this approach work for both UI-heavy and background code paths in Swift concurrency?

Yes, this Swift concurrency remediation approach works for both UI-heavy and background code paths. It provides specific migration guidance by applying targeted fixes like @MainActor isolation for UI contexts and concurrent functions for background tasks.

Why am I getting Sendable conformance warnings after migrating to Swift 6.2?

Sendable conformance warnings occur because Swift 6.2+ enforces strict data race safety. You can resolve these warnings by reviewing your code and applying minimal changes like adding @MainActor or introducing nonisolated functions to ensure safe concurrency.