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 irahardianto/awesome-agv --skill rust-idiomsgit clone --depth 1 https://github.com/irahardianto/awesome-agvWrote 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/irahardianto/awesome-agv/rust-idioms)<a href="https://agentmods.dev/skills/irahardianto/awesome-agv/rust-idioms"><img src="https://agentmods.dev/badge/skills/irahardianto/awesome-agv/rust-idioms/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/irahardianto/awesome-agv/rust-idioms"><img src="https://agentmods.dev/badge/skills/irahardianto/awesome-agv/rust-idioms.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 5 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 15 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 151 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 579 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 580 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
- medium Agent Snooping · line 581 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00049 | $0.06776 |
| Opus 5.5 | $0.00020 | $0.02710 |
| Sonnet 5.5 | $0.00010 | $0.01355 |
| Haiku 4.5 | $0.00005 | $0.00678 |
Grade A, and why
rust-idioms 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 28d 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 — 581 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Rust Idioms and Patterns
Core Philosophy
Rust's type system and ownership model are your primary tools for correctness. Lean into the compiler — it is your strongest ally. Write code that is idiomatic, safe, and expressive.
Scope: This file covers Rust-specific coding idioms. For file layout, see
references/project-structure.md(in this skill). For detailed safety, SAST security invariants, and performance anti-patterns, seereferences/rust-patterns-and-anti-patterns.md(in this skill). For Rust test naming and conventions, see §Testing below; for universal testing principles, see@.agents/rules/testing-strategy.md. For logging library choice and setup, see@.agents/skills/logging-implementation/SKILL.md.
Toolchain and Minimum Supported Rust Version
Default to the latest stable Rust. As of July 2026, this is Rust 1.97. All guidance in this skill assumes latest stable features. When creating new projects, set
rust-versioninCargo.tomlto prevent builds on outdated toolchains.
[package]
edition = "2024"
rust-version = "1.97"
Key version milestones that affect this skill:
- 1.75+ — Native
async fnin traits (noasync_traitcrate needed for static dispatch). This milestone is the single source of truth for theasync-traitcrate policy:- Prefer static dispatch —
impl MyTraitreturn params or genericT: MyTraitbounds use nativeasync fnin traits; no crate required and zero dispatch overhead. - Use the
async-traitcrate only when dynamic dispatch viadyn Traitis explicitly required — e.g.Box<dyn MyTrait>,Arc<dyn MyTrait>for runtime polymorphism, object-safe trait objects, or storing heterogeneous trait impls in a collection. - Never add
async-traitas a default dependency just for ergonomics — it adds a heap allocation and dynamic dispatch cost. Add it only for the specific crates/traits that needdyndispatch.
- Prefer static dispatch —
- 1.74+ — Workspace lint inheritance (
[workspace.lints]) - 1.63+ —
Mutex::new()inconstcontext (noOnceCellwrapper needed)
What ships with it
5 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.
- 28d ago Changed · -2 lines · +22 tokens per session 76e3d3962e6e
- 1mo ago First seen · 583 lines · 27 tokens per session scan A d4d2461ad0b1
rust-idioms is a skill published in the GitHub repository irahardianto/awesome-agv (156 stars, last pushed 11d ago), licensed MIT. It adds 49 tokens to every session and 6,776 once invoked, about $0.0002 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 2026-09-03.
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