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Guide Swift Concurrency

Organization
Prisma-Labs-Dev
guide-swift-concurrency

Swift concurrency patterns — actors, structured concurrency, cancellation, async streams, GCD migration, strict-concurrency diagnostics, common bug patterns. Use when writing, reviewing, or debugging concurrent Swift code.

Overview

PublisherPrisma-Labs-Dev
Repositoryapple-skills
Skill nameguide-swift-concurrency
Stars
348
Forks
21
Bundled files
12
LicenseMIT
Links
Skill sourceRepository
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • 12 bundled files

    Scripts, templates, and references the model can read while it works. Files are read-only and never executed.

  • Open source

    Published by Prisma-Labs-Dev on GitHub. Read the source before you install it.

Installation

Install the Guide Swift Concurrency AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
    https://github.com/Prisma-Labs-Dev/apple-skills/tree/main/skills/guide-swift-concurrency
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/Prisma-Labs-Dev/apple-skills.git /tmp/apple-skills
mkdir -p .claude/skills
cp -r /tmp/apple-skills/skills/guide-swift-concurrency .claude/skills/guide-swift-concurrency
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Guide Swift Concurrency in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Guide Swift Concurrency on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Guide Swift Concurrency is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Guide Skill — This is an expert workflow/pattern guide, not API reference documentation. Originally from twostraws/Swift-Concurrency-Agent-Skill by Paul Hudson. MIT License.

Swift Concurrency Patterns

Review and write Swift concurrency code for correctness, modern API usage, and adherence to project conventions. Report only genuine problems — do not nitpick or invent issues.

Core Instructions

  • Target Swift 6.2 or later with strict concurrency checking.
  • Prefer structured concurrency (task groups) over unstructured (Task {}).
  • Prefer Swift concurrency over GCD for new code. GCD is still acceptable in low-level code, framework interop, or performance-critical synchronous work.
  • Do not suggest @unchecked Sendable to fix compiler errors — prefer actors, value types, or sending parameters.

Review Process

  1. Scan for known-dangerous patterns using references/hotspots.md.
  2. Check for Swift 6.2 concurrency behavior using references/new-features.md.
  3. Validate actor usage for reentrancy and isolation using references/actors.md.
  4. Ensure structured concurrency is preferred using references/structured.md.
  5. Check unstructured task usage using references/unstructured.md.
  6. Verify cancellation handling using references/cancellation.md.
  7. Validate async stream and continuation usage using references/async-streams.md.
  8. Check bridging code between sync and async using references/bridging.md.
  9. Review legacy concurrency migrations using references/interop.md.
  10. Cross-check against common failure modes using references/bug-patterns.md.
  11. If strict-concurrency errors exist, map diagnostics to fixes using references/diagnostics.md.
  12. If reviewing tests, check async test patterns using references/testing.md.

If doing partial work, load only the relevant reference files.

References

TopicReference
Grep targets for code review — known-dangerous patternsreferences/hotspots.md
Swift 6.2: default isolation, @concurrent, Task.immediate, isolated deinitreferences/new-features.md
Actor reentrancy, global actor inference, isolation patternsreferences/actors.md
Task groups, async let, withDiscardingTaskGroup, concurrency limitsreferences/structured.md
Task vs Task.detached, when Task {} is a code smellreferences/unstructured.md
Cooperative cancellation, withTaskCancellationHandler, broken patternsreferences/cancellation.md
AsyncStream.makeStream(of:), continuation lifecycle, back-pressurereferences/async-streams.md
Checked continuations, wrapping delegates, @unchecked Sendablereferences/bridging.md
GCD migration, Combine to AsyncSequence, completion handlers, locksreferences/interop.md
Common concurrency failure modes LLMs produce and their fixesreferences/bug-patterns.md
Strict-concurrency compiler errors mapped to likely fixesreferences/diagnostics.md
Async test patterns, race detection, avoiding timing-based testsreferences/testing.md

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Guide Swift Concurrency AI skill do?

Swift concurrency patterns — actors, structured concurrency, cancellation, async streams, GCD migration, strict-concurrency diagnostics, common bug patterns. Use when writing, reviewing, or debugging concurrent Swift code.

Why use Guide Swift Concurrency on TypingMind?

Because you install it once and use it with any model. Guide Swift Concurrency is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Guide Swift Concurrency in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/Prisma-Labs-Dev/apple-skills/tree/main/skills/guide-swift-concurrency. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Guide Swift Concurrency?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Guide Swift Concurrency?

As many as you like. As long as a model supports skills, you can use Guide Swift Concurrency with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Guide Swift Concurrency AI skill free?

Yes. It is published on GitHub by Prisma-Labs-Dev under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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