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.

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.

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.

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.

Why a @MainActor class's deinit isn't isolated, what Swift 6.2's isolated deinit changes, when the cleanup runs, and the rules the compiler enforces, with tested code.

Fix 'main actor-isolated property can not be referenced from a nonisolated context' in Swift 6 with four compiled fixes and a snapshot pattern.

Swift 6 makes isolation an architecture decision. Why silencing warnings leads to Frankenstein Architecture, and how a shared architecture like CFA fixes it.

Swift 6 enforces @MainActor isolation, requires owners for static state, drops wrapper inference, and Swift 6.2 adds default MainActor and isolated deinit.

MainActor.run hops to the main actor and back. Learn when it fits, why @MainActor ViewModels don't need it, and how to migrate DispatchQueue.main.async.

In SwiftUI, View is @MainActor and so should your ViewModels be. Learn how main-actor state, .task and awaited work fit together in a CFA app.

A global actor is one shared isolation domain you apply as an attribute, like @MainActor. Learn to define one, fix its init error and when to use it.

Use a @MainActor class for UI state and an actor for state shared by many tasks. A tested CFA guide to choosing between actor and class in Swift 6.

An executor decides where a task's code runs: the main executor, an actor's serial executor or the global concurrent pool. Learn the model without threads.

Task { } inherits the caller's actor, so from a @MainActor ViewModel it runs on the main actor. Learn where tasks really run and how to move heavy work off main.

Yes: Task {} inherits actor isolation, priority and task-local values (SE-0304), but not cancellation. Tested examples from @MainActor and actor contexts.

3 Days of Swift Concurrency is growing beyond a course: iOS App Development with CFA brings tutorials, open-source apps, architecture and AI skills together.

Worried you're falling behind as an iOS developer? Build one modern app with AI, learn Swift Concurrency by making it work, tidy the code, and ship it.