swift-concurrency-expert

Swift Concurrency review and remediation for Swift 6.2+ codebases. Review and fix Swift Concurrency issues in Swift 6.2+ codebases by applying actor isolation, Sendable safety, and modern concurrency patterns with minimal behavior changes. Prefer edits that preserve existing behavior while satisfying data-race safety. Common fixes: UI-bound type — adding @MainActor Protocol conformance isolation Background work with @concurrent - Diagnoses and fixes actor isolation, Sendable safety, and data-race warnings through targeted edits that preserve existing behavior - Applies minimal, concrete fixes: @MainActor annotations, actor isolation, Sendable conformance, and completion-handler-to-async/await migrations - Triages compiler diagnostics by checking project concurrency settings, actor context, and whether code is UI-bound or background work - Verifies fixes by rebuilding, running tests, and iteratively resolving any new warnings until the build is clean - Capture the exact compiler diagnostics and the offending symbol(s). - Check project concurrency settings: Swift language version (6.2+), strict concurrency level, and whether approachable concurrency (default actor isolation / main-actor-by-default) is enabled. - Identify the current actor context ( @MainActor , actor , nonisolated ) and whether a default actor isolation mode is enabled. - Confirm whether the code is UI-bound or...