Agent skill

Swift Concurrency

Standards for async/await, Actors, Task Groups, and MainActor

View SKILL.md on GitHub Repository
Stars 163
Forks 31

Install this agent skill to your Project

npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/concurrency-hoangnguyen0403-agent-skills-standar

Metadata

Additional technical details for this skill

labels
swift concurrency async await actor
triggers 
{
    "files": [
        "**/*.swift"
    ],
    "keywords": [
        "async",
        "await",
        "actor",
        "Task",
        "MainActor"
    ]
}

SKILL.md

Swift Concurrency

Priority: P0

Implementation Guidelines

async/await

  • Async Functions: Mark with async, call with await.
  • Error Handling: Combine with throws for async throwing functions.
  • No Completion Handlers: Prefer async over callback-based APIs.

Actors

  • Data Isolation: Use actor for mutable state accessed from multiple tasks.
  • MainActor: Annotate UI code with @MainActor for main thread execution.
  • Actor Isolation: All actor properties/methods are isolated automatically.

Task Management

  • Structured Concurrency: Use Task {}, async let, TaskGroup.
  • Cancellation: Check Task.isCancelled, propagate cancellation.
  • Detached Tasks: Avoid Task.detached unless necessary.

Anti-Patterns

  • Blocking Main Thread: **No synchronous work in @MainActor**: Use Task.
  • Missing MainActor: **UI updates must be @MainActor**: Compiler error.
  • Ignoring Cancellation: **Check Task.isCancelled**: Respect cancellation.

References

  • async/await & Actors

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