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Modern Swift

Checked
johnrogers·vlatest·frontend·MIT

Generates clean, modern Swift code snippets for SwiftUI views and related frontend tasks, optimized for performance.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add johnrogers/claude-swift-engineering --skill modern-swift -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

johnrogers

Taken from the source listing. We haven't verified who controls this account.

Install target

Live repository

Not pinned. Installing fetches whatever the repository holds at the time you run the command.

No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

    No encoded or obfuscated payloads.

    No base64, hex or compressed blob is decoded and then executed, and no encoded shell commands.

  • No credential access: passed

    Reads no keys, tokens, keychains or credential files.

    Neither the code nor the SKILL.md instructions read SSH keys, cloud credentials, keychains, token stores, browser cookie databases or dotfiles that hold secrets.

  • No pipe-to-shell installers: passed

    No pipe-to-shell or download-and-run installers.

    No `curl … | sh` pattern, in the code or in the instructions, that runs code fetched at run time.

  • Pinned to a commit: passed

    Scanned johnrogers/claude-swift-engineering at 1dc2cf4d02.

    The exact upstream commit SHA that was scanned is recorded, so the result refers to specific bytes.

Commit
1dc2cf4d02
Manifest
plugins/swift-engineering/skills/modern-swift/SKILL.md
Scanned
9 files, 1,212 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill generates clean, modern Swift code snippets for SwiftUI views and related frontend tasks, optimized for performance using Swift 6.2+ features. It focuses on utilizing new concurrency patterns like async/await, @MainActor, and actor to replace older approaches (completion handlers, DispatchQueue, locks) and ensure compile-time safety against data races. The skill emphasizes leveraging these modern techniques for thread-safe code and efficient asynchronous operations.

When to use it

  • When needing to convert existing completion handler based code to Swift's new async/await syntax.
  • For implementing UI updates that require execution on the main thread using @MainActor.
  • When dealing with shared mutable state, replacing locks or serial queues with actors for safer concurrency.
  • To run multiple asynchronous operations in parallel utilizing TaskGroup.
  • When migrating legacy code to incorporate modern Swift attributes like @preconcurrency and @backDeployed.

Key capabilities

  • Generates code using async/await for asynchronous operations.
  • Utilizes @MainActor for UI updates on the main thread.
  • Employs actor for managing shared mutable state safely.
  • Supports the use of TaskGroup for parallel task execution.
  • Provides guidance on implementing task cancellation with Task.isCancelled and Task.checkCancellation().

Example prompts

  • "Generate a SwiftUI view that fetches data asynchronously using async/await."
  • "Show me how to update a UI element safely using @MainActor."
  • "How do I use an actor to manage shared state in Swift?"

Tips & gotchas

  • Reference Loading: Always load reference files, especially when dealing with concurrency patterns. This ensures the skill has access to necessary context and best practices.
  • Avoid @unchecked Sendable: Using this as a quick fix silences compiler errors but can mask potential data races; address the underlying issue instead.
  • Task Cancellation is Crucial: Remember to check Task.isCancelled or call Task.checkCancellation() within loops for long-running operations to ensure cancellation signals are processed correctly.