Swift Concurrency Agent Skill：Swift 并发编程专家技能

npx skills add https://github.com/avdlee/swift-concurrency-agent-skill --skill swift-concurrency

# 添加 marketplace
/plugin marketplace add AvdLee/Swift-Concurrency-Agent-Skill

# 安装技能
/plugin install swift-concurrency@swift-concurrency-agent-skill

{
  "enabledPlugins": {
    "swift-concurrency@swift-concurrency-agent-skill": true
  }
}

# 在 AI 助手中使用
> Use the swift concurrency skill and analyze the current project for Swift Concurrency improvements

# 示例任务
> 使用 swift concurrency 技能帮我检查这个 actor 是否正确实现
> 用 swift concurrency 技能优化这段异步代码
> 使用 swift concurrency 技能诊断数据竞争警告

actor Counter {
    private var value = 0

    func increment() -> Int {
        value += 1
        return value
    }
}

func fetchData() async throws -> Data {
    let url = URL(string: "https://api.example.com")!
    let (data, _) = try await URLSession.shared.data(from: url)
    return data
}

struct User: Sendable {
    let id: String
    let name: String
}

func fetchImages(urls: [URL]) async throws -> [Image] {
    try await withThrowingTaskGroup(of: Image.self) { group in
        for url in urls {
            group.addTask {
                try await fetchImage(url: url)
            }
        }
    }
}

for await value in asyncStream {
    process(value)
}

// 好：批量处理
actor Processor {
    func process(_ items: [Item]) async {
        await storage.save(items)
    }
}

@MainActor
class ViewModel: ObservableObject {
    @Published var data: [Item] = []
}

// 好：并行执行
await withTaskGroup(of: Void.self) { group in
    for item in items {
        group.addTask {
            await process(item)
        }
    }
}

// 错误
class Holder {
    let actor = MyActor()
    var state = actor.state  // ⚠️
}

// 错误
func update() {
    actor.update()  // ⚠️ 缺少 await
}

// 可能导致死锁
actor A {
    func b() async {
        await b.c()
    }
}