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Concurrency

Swift concurrency, actors and the Swift 6 migration in production code.

Concurrency

The Task Is Not the Unit of Work — Ownership, Isolation, and Cancellation Beyond async/await

Swift's concurrency checks make code thread-safe, but who owns an operation and how long it lives are architectural decisions — not something to inherit from a view's lifecycle.

Oct 6, 2026 • 11 min read

Concurrency

Swift 6 Migration Playbook: How We Moved Three Production Apps Without Halting Feature Delivery

A case study: five engineers migrated three production apps (~400K lines) to Swift 6 concurrency over 12 weeks without pausing feature delivery.

Oct 20, 2025 • 4 min read

Concurrency

Swift Concurrency: What I Wish Someone Had Told Me

Hard-won lessons from migrating three production apps to Swift 6's strict concurrency model: what @MainActor doesn't protect, and how actor reentrancy hides in code that looks clean.

Oct 15, 2025 • 7 min read