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.

Progress update, 1 November 2026: the 3DaysOfSwiftConcurrency.com site is live, CFA AI Toolkit for iOS v0.3.3 shipped, and the soft launch is targeted for 1 December 2026.

Cuentiva is a SwiftUI Spanish reading app from 3 Days of Swift Concurrency: StoreKit, SwiftData, on-device speech and CFA, with source-available code.

RocketLaunch (Next Rocket Launch) is a free SwiftUI teaching app with feature actors, three providers, deliberate failure handling and a GCD comparison project.

Personal API turns journal entries into a searchable dataset of your life. A public Swift Concurrency reference app with worker actors and race-condition tests.

Trend is a local-first SwiftUI weight tracker from 3 Days of Swift Concurrency: SwiftData, CloudKit sync, JSON backups and CFA, with public source.

Why 3 Days of Swift Concurrency publishes complete Swift Concurrency iOS Xcode projects on GitHub: rare real examples for developers and AI coding tools.

3 Days of Swift Concurrency is a hands-on Swift Concurrency training program for modern iOS developers: three days, one guided experience, real Xcode projects.

A 15-step curriculum for existing iOS developers: understand threads, memory, tasks and architecture, then design better features with Swift Concurrency and AI.

A dated snapshot of 3DaysOfSwiftConcurrency.com as of 17 October 2026: who it is for, how it works, what is free, what is planned and what changed.

XcodeBuildMCP is now MobileBuildMCP (v2.7.1). How to install it and let an AI agent build, run, test and drive your iOS app, and what changed.

Replace Task.sleep in tests with test spies to check timeouts, errors and cancellation deterministically and fast, with code verified on Swift 6.2.

How long it takes to learn Swift Concurrency: five milestones with self-tests instead of a calendar promise, what slows you down, and where the 3-day course fits.

SE-0553 Task Identity adds Task.currentID for logging and instrumentation. Why it isn't for app logic, and John McCall's side-channel warning.

Swift 6.4 lets you await in defer (SE-0493) and shield cleanup from cancellation with withTaskCancellationShield (SE-0504). When and how to make cleanup finish.

Real iOS apps built with AI and the CFA Toolkit: SwiftUI, SwiftData, Swift Concurrency and on-device AI, with public source code and honest licence notes.

A step-by-step guide to building a maintainable iOS app with AI and the free CFA Toolkit, then shipping it through TestFlight and App Store Connect.

Swift 6.2's @concurrent explained: why nonisolated async functions now run on the caller's actor, when to use @concurrent, and how to migrate safely.

The free, open-source CFA Toolkit gives AI coding assistants eight skills, an Xcode template and a dashboard for building and maintaining iOS apps.

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.