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.

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.

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.

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.

Yes: async throws(E) works in Swift 6. See where typed throws keeps its error type, where it widens to any Error, tested on Swift 6.2 and 6.4.

Use withDiscardingTaskGroup when child tasks only cause effects. A discarding task group explained with SE-0381, tested memory numbers and error behaviour in Swift concurrency.

Yes. Since SE-0310 a read-only computed property can be async or throws. See get async in protocols, actor snapshots and the exact compiler errors, tested on Swift 6.2.

What does an isolated parameter do in Swift? How isolated (any Actor)? = #isolation keeps a helper on its caller's actor, tested on Swift 6.2 and 6.4.

Do you need [weak self] in a Swift Task? Tested on Swift 6.2 and 6.4: when strong self is fine, when a task causes a retain cycle and memory leak, and two fixes.

Swift async map explained: why map rejects await, a sequential asyncMap, and a task group concurrentMap that preserves order and limits concurrency.

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

Build a custom AsyncSequence in Swift: why for await pulls values with next(), a paged API example, lazy operators, next(isolation:) and the iterator rules.

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

Swift concurrency interview questions with tested answers: async let, cancellation, actor reentrancy, Sendable, region isolation and Swift 6 migration.

Enable complete concurrency checking in Xcode or Package.swift, switch targets to Swift 6 mode, and optionally use default MainActor isolation. Tested.

How Swift's cooperative thread pool runs thousands of tasks on one thread per CPU core, why you must not block it, and how @concurrent and Task.yield help.

Strict concurrency checking is Swift's compile-time data-race checker. See Minimal, Targeted, Complete and Swift 6 mode compared on the same code.

No deadline for Swift 6 language mode, but since 28 April 2026 App Store uploads need Xcode 26 (Swift 6.2). Here's what's required and what's optional.

Big bang, file by file or feature slices? A behaviour-first, slice-by-slice Swift 6 migration strategy with leaf modules first and tested CFA examples.