Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add moeru-ai/auv --skill m07-concurrencygit clone --depth 1 https://github.com/moeru-ai/auvWrote 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/moeru-ai/auv/m07-concurrency)<a href="https://agentmods.dev/skills/moeru-ai/auv/m07-concurrency"><img src="https://agentmods.dev/badge/skills/moeru-ai/auv/m07-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/moeru-ai/auv/m07-concurrency"><img src="https://agentmods.dev/badge/skills/moeru-ai/auv/m07-concurrency.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00075 | $0.01609 |
| Opus 5.5 | $0.00030 | $0.00644 |
| Sonnet 5.5 | $0.00015 | $0.00322 |
| Haiku 4.5 | $0.00007 | $0.00161 |
Grade A, and why
m07-concurrency scanned grade A with 0 findings 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Concurrency
Layer 1: Language Mechanics
Core Question
Is this CPU-bound or I/O-bound, and what's the sharing model?
Before choosing concurrency primitives:
- What's the workload type?
- What data needs to be shared?
- What's the thread safety requirement?
Error → Design Question
| Error | Don't Just Say | Ask Instead |
|---|---|---|
| E0277 Send | "Add Send bound" | Should this type cross threads? |
| E0277 Sync | "Wrap in Mutex" | Is shared access really needed? |
| Future not Send | "Use spawn_local" | Is async the right choice? |
| Deadlock | "Reorder locks" | Is the locking design correct? |
Thinking Prompt
Before adding concurrency:
-
What's the workload?
- CPU-bound → threads (std::thread, rayon)
- I/O-bound → async (tokio, async-std)
- Mixed → hybrid approach
-
What's the sharing model?
- No sharing → message passing (channels)
- Immutable sharing → Arc
- Mutable sharing → Arc<Mutex> or Arc<RwLock>
-
What are the Send/Sync requirements?
- Cross-thread ownership → Send
- Cross-thread references → Sync
- Single-thread async → spawn_local
Trace Up ↑ (MANDATORY)
CRITICAL: Don't just fix the error. Trace UP to find domain constraints.
Domain Detection Table
| Context Keywords | Load Domain Skill | Key Constraint |
|---|---|---|
| Web API, HTTP, axum, actix, handler | domain-web | Handlers run on any thread |
| 交易, 支付, trading, payment | domain-fintech | Audit + thread safety |
| gRPC, kubernetes, microservice | domain-cloud-native | Distributed tracing |
| CLI, terminal, clap | domain-cli | Usually single-thread OK |
Example: Web API + Rc Error
"Rc cannot be sent between threads" in Web API context
↑ DETECT: "Web API" → Load domain-web
↑ FIND: domain-web says "Shared state must be thread-safe"
↑ FIND: domain-web says "Rc in state" is Common Mistake
↓ DESIGN: Use Arc<T> with State extractor
↓ IMPL: axum::extract::State<Arc<AppConfig>>
What ships with it
4 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.
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.
- 1mo ago First seen · 223 lines · 75 tokens per session scan A c2a3e990e34c
m07-concurrency is a skill published in the GitHub repository moeru-ai/auv (193 stars, last pushed today), licensed Apache-2.0. It adds 75 tokens to every session and 1,609 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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