3DaysOfSwiftConcurrency.com Free online Swift Concurrency tutorials. What Is the Main Thread? Every iOS application begins with a main thread. The main thread is an execution context used for much of the work that directly affects the application interface. Touch handling, view updates, layout, animation coordination and changes to UI-facing state all depend on the main execution domain remaining available. This is why iOS developers so often discuss blocking the main thread.

3DaysOfSwiftConcurrency.com Learn modern day cooperative architecture in Swift. What is Swift Concurrency? If you've ever wondered why Apple named its framework Swift Concurrency instead of Swift Parallelism, you're asking exactly the right question. Most tutorials introduce Swift Concurrency by teaching Task, async, await and actors. Before long you're writing asynchronous code, but there is one problem with this approach. It teaches you how to use the language before explai

Use the CFA AI Toolkit for iOS when starting a new Xcode project, building on Swift Concurrency, or upgrading a GCD app into CFA. Free skills, templates and an inspector for AI coding tools.

Cursor skills for iOS development: CFA AI Toolkit makes cancellation a policy—durable saves continue, replaceable work may stop, stale results never win.

What is Swift concurrency? A friendly guide an 8-year-old could follow: async/await, tasks, actors, the MainActor, Sendable and the runtime every iOS app runs on.

The sending keyword lets a non-Sendable value cross into an actor safely in Swift 6. See what the compiler accepts and rejects, tested on Swift 6.2 and 6.4.

Codex SwiftUI skill guide: the free CFA AI Toolkit saves inline edits without a Save button, keeps drafts when a save fails, offers Retry and never fakes success.

Give your AI a blueprint before it edits your Xcode project: CFA project map, specification, coding guide and change gate, and why that means less unsafe code

Why a tutorial app won't teach you iOS and an App Store submission will: real demands, whole-project structure, CFA starter apps and Release build checks.

No compiler warnings doesn't mean well structured. Compare Swift 6 checking with the CFA Health Check to tell if your migration left Frankenstein Architecture.

Can swift package migrate upgrade your whole iOS app? What it does for packages, what it can't, and where the CFA migration skill helps.

Swift 6.2 default main actor isolation and @concurrent, explained for AI-written iOS code, and where CFA puts the work that really runs off the main actor.

Should you turn on Swift 6 language mode before or after your AI upgrades the code? Minimal, Targeted and Complete compared, and why to upgrade into CFA.

The real Swift Concurrency migration tools, from Xcode strict checking to swift package migrate and AI, and why we built the free CFA AI Toolkit for iOS.

Claude Code built your iOS app? Check the Release build: the free CFA AI Toolkit verifies iPhone and iPad orientations and real bundle ID, name and version.

Debounce search in SwiftUI with .task(id:) and Task.sleep: one request after typing stops and no stale results. Tested on Swift 6.2 and 6.4.

Want AI to develop your iOS app? The free CFA AI Toolkit maps your existing Swift project first: tasks, awaits, Dispatch calls and callers, before AI changes code.

AI tools and new hires both copy the patterns they find. Why a shared, predictable iOS layout like CFA helps them, and why Frankenstein Architecture confuses them.

AI coding iOS? The free CFA AI Toolkit includes paired Before and After Xcode playgrounds showing legacy GCD code upgraded to Swift Concurrency, with the same check.

Explain Cooperative Feature Architecture (CFA) in 60 seconds and draw it on a whiteboard: five boxes, two arrows, one composition root, with real Swift from a CFA app.