rust-quality

A set of project instructions for implementing and reviewing Rust code. Rust is a programming language, and the instructions cover testing, dependencies, errors, public interfaces, and repository checks.

In plain words
What is it for?
Use it when changing Rust source files, Cargo metadata, tests, CI automation, dependencies, or Rust-related repository documentation.
Why use it?
It helps keep Rust changes reliable, deterministic, maintainable, and consistent with the project's dependency and safety rules.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/sioyooo/repogrammar/rust-quality
Any agent
npx skills add SioYooo/RepoGrammar --skill rust-quality
Clone the repo
git clone --depth 1 https://github.com/SioYooo/RepoGrammar

Made for: Claude Code, Codex.

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 352 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00031 $0.00352
Opus 5 $0.00015 $0.00176
Sonnet 5 $0.00006 $0.00070
Haiku 4.5 $0.00003 $0.00035

Measured yesterday against content hash fa998f1310bf, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

rust-quality 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 yesterday.

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.

.agents/skills/rust-quality/SKILL.md · 61 lines

What it actually says

Purpose

Maintain Rust correctness, deterministic tests, and minimal public API.

Trigger conditions

Use when editing Rust files under src/rust/, Cargo metadata, tests, CI quality commands, or repository automation implemented in Rust.

Required reading

  • docs/development/testing.md
  • docs/architecture/dependency-rules.md
  • docs/development/repository-guard.md

Preconditions

  • Confirm production dependencies are necessary now.
  • Confirm unsafe is not needed unless an accepted ADR permits it.

Step-by-step procedure

  1. Prefer explicit types and typed errors.
  2. Keep recoverable errors out of panic!.
  3. Avoid hidden global state and silent fallback.
  4. Keep public API minimal.
  5. Add deterministic tests under src/.
  6. Review dependency additions with an architecture or ADR update.

Required verification

cargo fmt --all -- --check
cargo clippy --workspace --all-targets --all-features -- -D warnings
cargo test --workspace --all-features

Documentation updates

Update testing docs, module map, dependency rules, or relevant specifications when Rust behavior or boundaries change.

Commit requirements

Commit code, tests, and docs together. Do not commit failed partial work as success.

Completion report

Report the exact Rust commands and results.

Failure and rollback handling

Do not add #[allow], skip tests, weaken lints, or hide warnings unless the maintainer explicitly accepts the tradeoff in documentation.

Changes

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.

  1. yesterday First seen · 61 lines · 31 tokens per session scan A fa998f1310bf

Subscribe to this mod's changes

rust-quality is a skill published in the GitHub repository SioYooo/RepoGrammar (0 stars, last pushed 19d ago), licensed MIT. It adds 31 tokens to every session and 352 once invoked, about $0.0002 per session on Opus 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 2026-08-31.

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