concurrency-patterns

SKILL.md

Expert decision frameworks for Swift concurrency choices. Claude knows async/await syntax — this skill provides judgment calls for pattern selection and isolation boundaries.

async let gotcha: All async let values MUST be awaited before scope ends. Forgetting to await silently cancels the task — no error, just missing data.

The trap: Task { } inside @MainActor runs on MainActor. For truly background work, use Task.detached(priority:).

专家 Swift 并发决策：async let 与 TaskGroup 选择、参与者隔离边界、@MainActor 放置策略、可发送一致性判断调用以及结构化与非结构化任务权衡。在设计并发代码、调试数据竞争或在并发模式之间进行选择时使用。触发关键字：async、await、actor、Task、TaskGroup、@MainActor、Sendable、并发、数据竞争、隔离、结构化并发、延续 来源：kaakati/rails-enterprise-dev。

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