swift-concurrency
Swift Concurrency patterns — async/await, actors, tasks, Sendable conformance. Use when writing async/await code, implementing actors, working with structured concurrency, or ensuring data race safety.
Best use case
swift-concurrency is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Swift Concurrency patterns — async/await, actors, tasks, Sendable conformance. Use when writing async/await code, implementing actors, working with structured concurrency, or ensuring data race safety.
Teams using swift-concurrency should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/swift-concurrency/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How swift-concurrency Compares
| Feature / Agent | swift-concurrency | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Swift Concurrency patterns — async/await, actors, tasks, Sendable conformance. Use when writing async/await code, implementing actors, working with structured concurrency, or ensuring data race safety.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# Swift Concurrency Patterns Expert guidance on Swift Concurrency best practices covering async/await, actors, tasks, Sendable, threading, memory management, testing, and migration strategies. ## Rules Core Swift Concurrency rules extracted as discrete, high-impact patterns. See [rules index](rules/_sections.md) for the full list organized by: - **Async/Await Patterns** - Never add dummy suspension points to silence warnings - **Actor Isolation** - Use actors for data-race safety with compiler verification - **Task Lifecycle** - Understand task cancellation and structured concurrency - **Sendable Conformance** - Require Sendable for crossing concurrency boundaries - **Testing** - Patterns for testing async concurrent code without flaky tests ## References See [references/swift-concurrency.md](references/swift-concurrency.md) for comprehensive guidance organized by: - **Async/Await Fundamentals** - Core patterns, error handling, parallel execution - **Tasks & Structured Concurrency** - Task lifecycle, cancellation, task groups - **Actors & Isolation** - Actor isolation, suspension points, state safety - **Sendable & Data Safety** - Sendable conformance, data races, safe captures - **Threading & Execution** - Execution contexts, isolation domains - **Memory Management** - Retain cycles, weak references, task lifecycle - **Testing Concurrency** - Async test patterns, Swift Testing integration - **Migration & Interop** - Strict concurrency migration, legacy interop ## Examples ### Positive Trigger User: "Refactor callback-based network code to async/await with actor isolation." Expected behavior: Use `swift-concurrency` guidance, follow its workflow, and return actionable output. ### Non-Trigger User: "Refactor CSS grid layout for mobile breakpoints." Expected behavior: Do not prioritize `swift-concurrency`; choose a more relevant skill or proceed without it. ## Troubleshooting ### Skill Does Not Trigger - Error: The skill is not selected when expected. - Cause: Request wording does not clearly match the description trigger conditions. - Solution: Rephrase with explicit domain/task keywords from the description and retry. ### Guidance Conflicts With Another Skill - Error: Instructions from multiple skills conflict in one task. - Cause: Overlapping scope across loaded skills. - Solution: State which skill is authoritative for the current step and apply that workflow first. ### Output Is Too Generic - Error: Result lacks concrete, actionable detail. - Cause: Task input omitted context, constraints, or target format. - Solution: Add specific constraints (environment, scope, format, success criteria) and rerun. ## Workflow 1. Identify whether the request clearly matches `swift-concurrency` scope and triggers. 2. Apply the skill rules and referenced guidance to produce a concrete result. 3. Validate output quality against constraints; if gaps remain, refine once with explicit assumptions.
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