swift-concurrency

Fix Swift concurrency warnings during a Swift 6 migration by analyzing compiler diagnostics, adjusting project settings like strict concurrency and default isolation, and applying async/await, actor isolation, and Sendable patterns to eliminate data races and boundary issues.

The best way to migrate to async/await and actor isolation is to follow a step-by-step workflow that diagnoses threading issues, applies actor boundaries for UI thread safety, and verifies cross-boundary data safety using migration references and linting guardrails.

Sendable conformance errors occur because data crossing actor isolation boundaries is not thread-safe; resolve them by diagnosing compiler diagnostics, enforcing strict concurrency settings, and refactoring shared state into actors or Sendable types.

Yes, you can generate a concurrency migration plan for iOS and macOS Swift projects by analyzing the codebase for concurrency warnings and using the Concurrency Reference Router to guide remediation across threading, actors, and Sendable boundaries.

Strict concurrency checking exposes data races and cross-boundary data safety issues by enforcing Sendable requirements and actor isolation, requiring you to analyze project settings and apply fixes to reduce UI thread safety risks during migration.

Avoid using actors when simpler async/await patterns suffice without adding isolation overhead; analyze compiler diagnostics and use migration references to determine when Sendable boundaries or default isolation settings are more appropriate than actor isolation.