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:).

專家 Swift 並發決策：async let 與 TaskGroup 選擇、參與者隔離邊界、@MainActor 放置策略、可發送一致性判斷呼叫以及結構化與非結構化任務權衡。在設計並發程式碼、調試資料競賽或在並發模式之間進行選擇時使用。觸發關鍵字：async、await、actor、Task、TaskGroup、@MainActor、Sendable、並發、資料競爭、隔離、結構化並發、延續 來源：kaakati/rails-enterprise-dev。

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