Skill UI

Covers Swift 6.2's proximity concurrency, where code runs on a single thread by default, @concurrent explicitly offloads hotspots, MainActor default inference manages protocol conformance, and compiler settings prevent implicit background execution.

This expert reviews and rectifies complex Swift Concurrency issues, such as actor isolation violations, Sendable safety breaches, and data races. It applies modern patterns (like `@MainActor` and `actor` usage) to ensure code adheres to Swift 6.2+ standards while minimizing behavior changes. Use it when debugging concurrency warnings or migrating legacy codebases.