Swift Concurrency
Swift concurrency: async/await, Actor, Task, Sendable patterns.
Install
$ agentstack add skill-notque-vexjoy-agent-swift-concurrency ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-notque-vexjoy-agent-swift-concurrency) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Swift Structured Concurrency
Pattern catalog for Swift's structured concurrency model: async/await, Actors, TaskGroups, AsyncSequence, Sendable, and cancellation. Load the reference file matching the developer's question.
Reference Loading Table
| Signal | Reference File | Content | |--------|---------------|---------| | async/await, Task, Sendable | references/fundamentals.md | async/await patterns, Task/Task.detached, Sendable/@Sendable | | Actor, @MainActor, nonisolated | references/actor-isolation.md | Actor isolation, MainActor UI confinement, nonisolated opt-out | | TaskGroup, AsyncSequence, AsyncStream, cancellation | references/task-patterns.md | Structured concurrency, rate-limited groups, streams, cancellation | | Failure modes, common mistakes | references/preferred-patterns.md | Blocking MainActor, task leaking, actor reentrancy hazard |
Key Conventions
- Prefer structured concurrency -- use
TaskGroupover looseTask { }whenever possible; structured tasks propagate cancellation and errors automatically. - Mark types Sendable -- enable strict concurrency checking (
-strict-concurrency=complete) and resolve all warnings before they become errors in Swift 6. - Use actors for shared mutable state -- avoid manual locks; actors provide compiler-verified safety.
- Cancel what you create -- every
Taskstored in a property should have a corresponding cancellation path. - Minimize @MainActor surface -- isolate only the UI layer; keep business logic and networking off the main actor.
References
references/fundamentals.md-- async/await, Task, Sendable basicsreferences/actor-isolation.md-- Actor, @MainActor, nonisolatedreferences/task-patterns.md-- TaskGroup, AsyncSequence, AsyncStream, cancellationreferences/preferred-patterns.md-- blocking, leaking, reentrancy mistakes
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: notque
- Source: notque/vexjoy-agent
- License: MIT
- Homepage: https://vexjoy.com
Install and usage instructions live in the source repository linked above.
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Versions
- v0.1.0 Imported from the upstream source.