Summary
Swift 6.2 finally fixes the implicit background offloading problem that caused data races in earlier versions. Now async functions stay on the calling actor by default, so your MainActor code actually stays on the main thread unless you explicitly mark something @concurrent. The isolated conformance feature is the real unlock here: MainActor types can conform to protocols without compiler errors or unsafe workarounds. If you're migrating from 5.x or dealing with Sendable errors in 6.0/6.1, this is the new mental model. Enable MainActor default inference for app targets and only reach for @concurrent when profiling shows you actually need background execution.
Install to Claude Code
npx -y skills add affaan-m/everything-claude-code --skill swift-concurrency-6-2 --agent claude-codeInstalls into .claude/skills of the current project.
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Fastest browser for AI agents to run web automation tasks, always free.
Download Free life-time →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →Categories
