Guides developers in using synchronous actor access and assumeIsolated patterns for Swift concurrency.
This skill provides specialized implementation patterns and best practices for managing Swift actor isolation domains synchronously. It focuses on the assumeIsolated API, enabling developers to access actor-isolated state without the overhead of asynchronous hops in performance-critical code, unit tests, and legacy delegate callbacks. By clarifying the differences between Task-based execution and synchronous isolation checks, it helps prevent common concurrency pitfalls and ensures thread safety in modern xOS application development.
Key Features
01Detailed safety checks and crash behavior documentation
02Performance optimization tips for avoiding unnecessary async hops
03Implementation patterns for MainActor.assumeIsolated and custom actors
04Guidance on @preconcurrency protocol conformances and legacy delegates
05Synchronous unit testing strategies for actor-isolated code
06233 GitHub stars
Use Cases
01Testing MainActor ViewModels synchronously to avoid Task overhead and flakiness
02Optimizing high-frequency code paths that require synchronous access to protected actor state
03Interfacing with legacy UIKit or CoreLocation delegates guaranteed to run on the main thread
