Swift Concurrency

A focused reference for Swift's modern concurrency primitives. You get the core docs for async/await, Task, TaskGroup, actors, AsyncSequence, and continuations all cached locally, which is exactly what you need when you're knee-deep in refactoring callback hell or debugging data races. The skill runs in fork mode with the Explore agent, so it stays out of your way until you need to look something up. Nice touch: it tells you to check other installed Apple skills before fetching from the web, which keeps context windows lean. If you're writing Swift server code or modernizing an iOS app to structured concurrency, this beats tabbing between browser windows.

skills.sh installs: 236
GitHub stars: 248
last updated: Jun 3, 2026

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Install

$ npx -y skills add vabole/apple-skills --skill swift-concurrency --agent claude-code

Installs into .claude/skills of the current project.

Files

Swift Concurrency Reference

Structured concurrency, actors, and async sequences in Swift.

Downloaded Reference Files

File	Content
concurrency-overview.md	Swift concurrency index
task.md	Task struct
taskgroup.md	TaskGroup for parallel work
actor.md	Actor protocol
asyncsequence.md	AsyncSequence protocol
asyncstream.md	AsyncStream
checkedcontinuation.md	CheckedContinuation for bridging

Fetching More Docs

Search this skill's local .md files first.
If the topic is not here, check the other installed Apple skills you have available by their names, descriptions, or SKILL.md frontmatter, then grep their local files. This is faster and uses less context than fetching new docs from the internet.
If no installed skill has the page, use the relevant documentation path from concurrency-overview.md with the sosumi.ai Markdown mirror. For example, /documentation/swift/task maps to https://sosumi.ai/documentation/swift/task.