Swift Concurrency Expert

The Swift Concurrency Expert skill enables AI agents to generate, refactor, and debug modern Swift code using the async/await syntax. It specifically handles tasks involving actors, global actors, and structured concurrency patterns to ensure thread-safe and efficient application logic.

When to use it

• Refactoring legacy blocking code into non-blocking async functions for better UI responsiveness.
• Generating robust actor-based models to manage shared state safely in multi-threaded environments.
• Debugging race conditions or deadlocks caused by improper concurrency usage in iOS or macOS apps.
• Creating complex task groups to orchestrate multiple asynchronous operations efficiently.

Key capabilities

• Writing and optimizing async/await functions
• Defining and implementing Actor types for data isolation
• Utilizing Task, TaskGroup, and Sendable constraints
• Managing global actors for system-wide coordination
• Identifying concurrency violations and potential race conditions

Example prompts

• "Convert this synchronous network request into an async function using Swift Concurrency."
• "Create a new Actor to manage user session state safely across multiple threads."
• "Refactor this code block to use TaskGroup for parallel image loading without blocking the main thread."

Tips & gotchas

Ensure your target Xcode version supports Swift concurrency features, as older versions may not compile actor definitions or async syntax. Always verify that types passed between actors conform to Sendable to prevent data races at runtime.