Borrowing it
Nothing to install: this file belongs to setavenger/agent-skill-set. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/setavenger/agent-skill-set/master/.cursor/skills/swift-concurrency/SKILL.mdgit clone --depth 1 https://github.com/setavenger/agent-skill-setWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/setavenger/agent-skill-set/swift-concurrency)<a href="https://agentmods.dev/skills/setavenger/agent-skill-set/swift-concurrency"><img src="https://agentmods.dev/badge/skills/setavenger/agent-skill-set/swift-concurrency/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/setavenger/agent-skill-set/swift-concurrency"><img src="https://agentmods.dev/badge/skills/setavenger/agent-skill-set/swift-concurrency.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00103 | $0.03726 |
| Opus 5.5 | $0.00041 | $0.01490 |
| Sonnet 5.5 | $0.00021 | $0.00745 |
| Haiku 4.5 | $0.00010 | $0.00373 |
Grade A, and why
swift-concurrency scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
group.addTask { try await fetch(id) } The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- evals/evals.json 4.4 KB
- references/approachable-concurrency.md 3.5 KB
- references/async-algorithms.md 2.6 KB
- references/bridging-interop.md 4.8 KB
- references/concurrency-patterns.md 7.8 KB
- references/diagnostics.md 3.6 KB
- references/swiftui-concurrency.md 5.1 KB
- references/synchronization-primitives.md 10 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2mo ago First seen · 429 lines · 103 tokens per session scan A 6967a2f08880
swift-concurrency is a skill published in the GitHub repository setavenger/agent-skill-set (2 stars, last pushed 3mo ago), with no licence file. It adds 103 tokens to every session and 3,726 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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