Agent skill

Swift Actor Persistence

在 Swift 中使用 actor 实现线程安全的数据持久化——基于内存缓存与文件支持的存储，通过设计消除数据竞争. An agent skill from affaan-m/ECC.

MITAuto-check passedMobile

Install Swift Actor Persistence

skills CLI

$ npx skills add affaan-m/ECC --skill swift-actor-persistence -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC swift-actor-persistence --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .claude/skills && cp -r skills-src/docs/zh-CN/skills/swift-actor-persistence .claude/skills/swift-actor-persistence && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "swift-actor-persistence" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/swift-actor-persistence into .claude/skills/swift-actor-persistence/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "swift-actor-persistence", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/swift-actor-persistence

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add affaan-m/ECC --skill swift-actor-persistence -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC swift-actor-persistence --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .agents/skills && cp -r skills-src/docs/zh-CN/skills/swift-actor-persistence .agents/skills/swift-actor-persistence && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "swift-actor-persistence" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/swift-actor-persistence into .agents/skills/swift-actor-persistence/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "swift-actor-persistence", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill swift-actor-persistence -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC swift-actor-persistence --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/docs/zh-CN/skills/swift-actor-persistence .cursor/skills/swift-actor-persistence && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "swift-actor-persistence" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/swift-actor-persistence into .cursor/skills/swift-actor-persistence/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "swift-actor-persistence", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/affaan-m/ECC.git --path docs/zh-CN/skills/swift-actor-persistence

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add affaan-m/ECC --skill swift-actor-persistence -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC swift-actor-persistence --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/docs/zh-CN/skills/swift-actor-persistence .gemini/skills/swift-actor-persistence && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "swift-actor-persistence" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/swift-actor-persistence into .gemini/skills/swift-actor-persistence/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "swift-actor-persistence", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install affaan-m/ECC swift-actor-persistence

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add affaan-m/ECC --skill swift-actor-persistence -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .github/skills && cp -r skills-src/docs/zh-CN/skills/swift-actor-persistence .github/skills/swift-actor-persistence && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "swift-actor-persistence" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/swift-actor-persistence into .github/skills/swift-actor-persistence/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "swift-actor-persistence", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add affaan-m/ECC --skill swift-actor-persistence -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install affaan-m/ECC swift-actor-persistence --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/affaan-m/ECC.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/docs/zh-CN/skills/swift-actor-persistence .opencode/skills/swift-actor-persistence && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "swift-actor-persistence" agent skill from https://github.com/affaan-m/ECC/tree/main/docs/zh-CN/skills/swift-actor-persistence into .opencode/skills/swift-actor-persistence/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "swift-actor-persistence", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: swift-actor-persistence
GitHub stars: 276k
Used in: 3 other repos
Token cost: ~871 tokens
SKILL.md length: 116 words
Files: 1
Skills in repo: 683
Repo updated: Oct 10, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

在 Swift 中使用 actor 实现线程安全的数据持久化——基于内存缓存与文件支持的存储，通过设计消除数据竞争. An agent skill from affaan-m/ECC.

Tasks that involve iOS development
SKILL.md covers 何时激活, 核心模式, 关键设计决策 and 最佳实践, plus 2 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Swift Actor Persistence is an agent skill from affaan-m/ECC. 在 Swift 中使用 actor 实现线程安全的数据持久化——基于内存缓存与文件支持的存储，通过设计消除数据竞争。

Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Mobile, covering iOS development. The repository describes itself as: The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The licence is MIT.

When your agent uses it

Tasks that involve iOS development

Example prompts

“/swift-actor-persistence”

What it can do on your machine

Read from SKILL.md and the folder at commit 4eb71d9. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are swift).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Swift Actor Persistence loads about 871 tokens when it runs. Until then it costs about 21 tokens; SKILL.md has 116 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~21
When it runs · the whole SKILL.md, loaded when a task matches: ~871

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from affaan-m/ECC at commit 4eb71d9, republished under its MIT licence (© affaan-m). 116 words, ~871 tokens.

Download SKILL.mdSave it as .claude/skills/swift-actor-persistence/SKILL.md (or your agent's skills folder).

name: swift-actor-persistence
description: 在 Swift 中使用 actor 实现线程安全的数据持久化——基于内存缓存与文件支持的存储，通过设计消除数据竞争。
origin: ECC

用于线程安全持久化的 Swift Actor

使用 Swift actor 构建线程安全数据持久化层的模式。结合内存缓存与文件支持的存储，利用 actor 模型在编译时消除数据竞争。

何时激活

在 Swift 5.5+ 中构建数据持久化层
需要对共享可变状态进行线程安全访问
希望消除手动同步（锁、DispatchQueue）
构建具有本地存储的离线优先应用

核心模式

基于 Actor 的存储库

Actor 模型保证了序列化访问 —— 没有数据竞争，由编译器强制执行。

swift

public actor LocalRepository<T: Codable & Identifiable> where T.ID == String {
    private var cache: [String: T] = [:]
    private let fileURL: URL

    public init(directory: URL = .documentsDirectory, filename: String = "data.json") {
        self.fileURL = directory.appendingPathComponent(filename)
        // Synchronous load during init (actor isolation not yet active)
        self.cache = Self.loadSynchronously(from: fileURL)
    }

    // MARK: - Public API

    public func save(_ item: T) throws {
        cache[item.id] = item
        try persistToFile()
    }

    public func delete(_ id: String) throws {
        cache[id] = nil
        try persistToFile()
    }

    public func find(by id: String) -> T? {
        cache[id]
    }

    public func loadAll() -> [T] {
        Array(cache.values)
    }

    // MARK: - Private

    private func persistToFile() throws {
        let data = try JSONEncoder().encode(Array(cache.values))
        try data.write(to: fileURL, options: .atomic)
    }

    private static func loadSynchronously(from url: URL) -> [String: T] {
        guard let data = try? Data(contentsOf: url),
              let items = try? JSONDecoder().decode([T].self, from: data) else {
            return [:]
        }
        return Dictionary(uniqueKeysWithValues: items.map { ($0.id, $0) })
    }
}

用法

由于 actor 隔离，所有调用都会自动变为异步：

swift

let repository = LocalRepository<Question>()

// Read — fast O(1) lookup from in-memory cache
let question = await repository.find(by: "q-001")
let allQuestions = await repository.loadAll()

// Write — updates cache and persists to file atomically
try await repository.save(newQuestion)
try await repository.delete("q-001")

与 @Observable ViewModel 结合使用

swift

@Observable
final class QuestionListViewModel {
    private(set) var questions: [Question] = []
    private let repository: LocalRepository<Question>

    init(repository: LocalRepository<Question> = LocalRepository()) {
        self.repository = repository
    }

    func load() async {
        questions = await repository.loadAll()
    }

    func add(_ question: Question) async throws {
        try await repository.save(question)
        questions = await repository.loadAll()
    }
}

关键设计决策

决策	理由
Actor（而非类 + 锁）	编译器强制执行的线程安全性，无需手动同步
内存缓存 + 文件持久化	从缓存中快速读取，持久化写入磁盘
同步初始化加载	避免异步初始化的复杂性
按 ID 键控的字典	按标识符进行 O(1) 查找
泛型化 `Codable & Identifiable`	可在任何模型类型中重复使用
原子文件写入 (`.atomic`)	防止崩溃时部分写入

最佳实践

对所有跨越 actor 边界的数据使用 Sendable 类型
保持 actor 的公共 API 最小化 —— 仅暴露领域操作，而非持久化细节
使用 .atomic 写入 以防止应用在写入过程中崩溃导致数据损坏
在 init 中同步加载 —— 异步初始化器会增加复杂性，而对本地文件的益处微乎其微
与 @Observable ViewModel 结合使用 以实现响应式 UI 更新

应避免的反模式

在 Swift 并发新代码中使用 DispatchQueue 或 NSLock 而非 actor
将内部缓存字典暴露给外部调用者
在不进行验证的情况下使文件 URL 可配置
忘记所有 actor 方法调用都是 await —— 调用者必须处理异步上下文
使用 nonisolated 来绕过 actor 隔离（违背了初衷）

何时使用

iOS/macOS 应用中的本地数据存储（用户数据、设置、缓存内容）
稍后同步到服务器的离线优先架构
应用中多个部分并发访问的任何共享可变状态
用现代 Swift 并发性替换基于 DispatchQueue 的旧式线程安全机制

Files

Just SKILL.md in docs/zh-CN/skills/swift-actor-persistence of affaan-m/ECC.

Open the folder on GitHubat commit 4eb71d9

Used in 3 other repositories

We found 3 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 3 other GitHub owners. This page covers the copy in affaan-m/ECC, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Swift Actor Persistence next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Swift Actor Persistence compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Swift Actor Persistence this skillaffaan-m/ECC	276k	3 repos	~871	Automated safety check: Pass	MIT	today
Swiftui Protwostraws/SwiftUI-Agent-Skill	5.6k	2 repos	~1.5k	Automated safety check: Pass	MIT	3 days ago
Swiftui UI PatternsAFK-surf/OpenBridge	430	4 repos	~887	Automated safety check: Pass	MIT	4 mo ago
Swiftui Performance Auditharperreed/dotfiles	334	8 repos	~1.4k	Automated safety check: Pass	None	7 days ago
Swift Testing ExpertAvdLee/Swift-Testing-Agent-Skill	471	1 repos	~1.2k	Automated safety check: Pass	MIT	26 days ago
Hig Project Contextraintree-technology/hig-doctor	143	5 repos	~1.2k	Automated safety check: Pass	MIT	29 days ago

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Questions about Swift Actor Persistence

What does Swift Actor Persistence do?

在 Swift 中使用 actor 实现线程安全的数据持久化——基于内存缓存与文件支持的存储，通过设计消除数据竞争. An agent skill from affaan-m/ECC. Swift Actor Persistence is an agent skill from affaan-m/ECC.

When should I use Swift Actor Persistence?

Swift Actor Persistence fits situations like: tasks that involve iOS development.

How do I install Swift Actor Persistence in Claude Code?

Run `npx skills add affaan-m/ECC --skill swift-actor-persistence -a claude-code`. Or copy the skill folder (docs/zh-CN/skills/swift-actor-persistence in affaan-m/ECC) into .claude/skills/swift-actor-persistence in your project. Claude Code loads it when a task matches its description.

How do I install Swift Actor Persistence in Codex?

Run `npx skills add affaan-m/ECC --skill swift-actor-persistence -a codex`. Or copy the skill folder (docs/zh-CN/skills/swift-actor-persistence in affaan-m/ECC) into .agents/skills/swift-actor-persistence in your project. Codex loads it when a task matches its description.

Can I use Swift Actor Persistence in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add affaan-m/ECC --skill swift-actor-persistence -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/swift-actor-persistence, .gemini/skills/swift-actor-persistence, .github/skills/swift-actor-persistence and .opencode/skills/swift-actor-persistence in your project.

What does Swift Actor Persistence need to run?

SKILL.md names no scripts, command-line tools or credentials: Swift Actor Persistence is instructions for the agent only.

Does Swift Actor Persistence access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Swift Actor Persistence safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Swift Actor Persistence use?

Swift Actor Persistence is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Swift Actor Persistence use?

About 871 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Swift Actor Persistence?

Skills that share tags, products or a category with Swift Actor Persistence: Swiftui Pro (twostraws/SwiftUI-Agent-Skill, 5.6k stars), Swiftui UI Patterns (AFK-surf/OpenBridge, 430 stars), Swiftui Performance Audit (harperreed/dotfiles, 334 stars) and Swift Testing Expert (AvdLee/Swift-Testing-Agent-Skill, 471 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Swift Actor Persistence?

affaan-m (a GitHub user) maintains it in affaan-m/ECC, which has 276,111 GitHub stars. The repository holds 683 skills in this directory. The repository was last updated on October 10, 2026.

Source: affaan-m/ECC on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Swift Actor Persistence

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

用于线程安全持久化的 Swift Actor

何时激活

核心模式

基于 Actor 的存储库

用法

与 @Observable ViewModel 结合使用

关键设计决策

最佳实践

应避免的反模式

何时使用

Files

Used in 3 other repositories

Compare with similar skills

Similar skills

More from affaan-m/ECC

Related

Questions about Swift Actor Persistence