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Swift Actor Persistence

Teaches the agent to build thread-safe Swift data stores using actors with file-backed JSON storage.

Source Download skill
Repository
affaan-m/ECC
Stars
295,127
Licence
MIT
Files
1 file

What it does

This is a set of written guidelines that teaches an AI agent how to build a local data storage layer for Swift apps (iOS or macOS). Once installed, the agent will suggest and write code using Swift's actor model, which keeps data from being corrupted when several parts of an app read and write at the same time, and it will save data to a JSON file on the device with safe atomic writes. The skill contains no executable scripts; it only shapes the agent's written code and advice.

Great for

  • Swift developers building offline-first iOS or macOS apps that store data locally
  • Developers migrating from DispatchQueue or NSLock thread safety to modern Swift concurrency
  • Teams wanting a consistent starting pattern for in-memory caches backed by a file

Skip it if

  • Apps needing a database such as Core Data, SwiftData, or SQLite for large or relational data, since this pattern loads everything into memory as one JSON file
  • Non-Swift projects, because the guidance only covers Swift 5.9+ and Apple platforms
  • Storing sensitive data like passwords or health records, because the skill does not mention encryption and the file is plain JSON

Try asking

  • “Create a thread-safe local repository in Swift for storing my quiz questions as JSON”
  • “Show me how to wire an @Observable view model to an actor-based data store in SwiftUI”
  • “Refactor my DispatchQueue-protected cache into a Swift actor”
Step-by-step guide: how to use Swift Actor PersistenceInstall, first run, examples, tips and FAQs

Install in 3 steps

  1. 1

    Download the skill

    The ZIP contains the 1 original files, the MIT licence and an attribution note.

    swift-actor-persistence.zip
  2. 2

    Add it to your agent

    Claude Code (all projects)

    mkdir -p ~/.claude/skills && unzip swift-actor-persistence.zip -d ~/.claude/skills/

    Claude Code / Agent SDK (this project only)

    mkdir -p .claude/skills && unzip swift-actor-persistence.zip -d .claude/skills/

    Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.

  3. 3

    Ask for the task

    No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.

Get better results

  • Ask the agent to confirm your model types conform to Sendable and Codable before using them with the repository
  • Add encryption or a real database yourself if the data is sensitive or grows large, since the skill does not cover these
  • Review the generated code for unbounded memory use if your dataset may grow big

What's inside

  • SKILL.md

Redistributed unmodified from affaan-m/ECC under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.