dev-rust-engineer

dev-rust-engineer is a skill for Claude Code, Codex from ThiagoGuislotti/copilot-instructions. It costs 50 tokens per session (248 once invoked), scanned A, original, MIT.

A set of instructions for organizing, changing, and testing Rust code, the programming language used in Cargo projects.

In plain words
What is it for?
Supports work on Cargo crates, Rust modules, refactors, public APIs, error handling, and Rust test files.
Why use it?
It helps preserve the project's module structure and ensures tests, including error cases, are discovered and maintained correctly.

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/thiagoguislotti/copilot-instructions/dev-rust-engineer
Any agent
npx skills add ThiagoGuislotti/copilot-instructions --skill dev-rust-engineer
Clone the repo
git clone --depth 1 https://github.com/ThiagoGuislotti/copilot-instructions

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for dev-rust-engineer

README.md
[![agentmods](https://agentmods.dev/badge/skills/thiagoguislotti/copilot-instructions/dev-rust-engineer.svg)](https://agentmods.dev/skills/thiagoguislotti/copilot-instructions/dev-rust-engineer)
Your own site
<a href="https://agentmods.dev/skills/thiagoguislotti/copilot-instructions/dev-rust-engineer"><img src="https://agentmods.dev/badge/skills/thiagoguislotti/copilot-instructions/dev-rust-engineer.svg" alt="Measured on agentmods" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 248 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 $0.00050 $0.00248
Opus 5 $0.00025 $0.00124
Sonnet 5 $0.00010 $0.00050
Haiku 4.5 $0.00005 $0.00025

Measured 3d ago against content hash 2f079ffae674, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

dev-rust-engineer 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 3d 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.

.claude/skills/dev-rust-engineer/SKILL.md · 41 lines

What it actually says

Rust Engineer

Load context first

  1. .github/AGENTS.md
  2. .github/copilot-instructions.md
  3. .github/instructions/repository-operating-model.instructions.md

Rust instruction pack

  • .github/instructions/rust-code-organization.instructions.md
  • .github/instructions/rust-testing.instructions.md

Claude-native execution

Run as a general-purpose agent within the Super Agent pipeline.

Execution workflow

  1. Keep module/file organization aligned with repository structure rules.
  2. Implement behavior changes with explicit error handling and public API focus.
  3. Add/update required tests, including error-path coverage.
  4. Ensure tests/test_suite.rs discovery strategy remains valid.
  5. Run validation only after green checks.

Prompt accelerators

  • .github/prompts/create-rust-module.prompt.md

Validation examples

cargo fmt --check
cargo build
cargo test
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. 3d ago First seen · 41 lines · 50 tokens per session scan A 2f079ffae674

Subscribe to this mod's changes

dev-rust-engineer is a skill published in the GitHub repository ThiagoGuislotti/copilot-instructions (2 stars, last pushed 2mo ago), licensed MIT. It adds 50 tokens to every session and 248 once invoked, about $0.0003 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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