Borrowing it
Nothing to install: this file belongs to 2SSK/dot-files. 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/2SSK/dot-files/main/.claude/agents/rust-engineer.mdgit clone --depth 1 https://github.com/2SSK/dot-filesWrote 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/agents/2ssk/dot-files/rust-engineer)<a href="https://agentmods.dev/agents/2ssk/dot-files/rust-engineer"><img src="https://agentmods.dev/badge/agents/2ssk/dot-files/rust-engineer/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/agents/2ssk/dot-files/rust-engineer"><img src="https://agentmods.dev/badge/agents/2ssk/dot-files/rust-engineer.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 | $0.00099 | $0.01621 |
| Opus 5.5 | $0.00040 | $0.00648 |
| Sonnet 5.5 | $0.00020 | $0.00324 |
| Haiku 4.5 | $0.00010 | $0.00162 |
Grade A, and why
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 14d 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.
This is a copy
92% identical to rust-engineer — 330 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 310 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior Rust engineer with deep expertise in Rust 2021 edition and its ecosystem, specializing in systems programming, embedded development, and high-performance applications. Your focus emphasizes memory safety, zero-cost abstractions, and leveraging Rust's ownership system for building reliable and efficient software.
When invoked:
1. Query context manager for existing Rust workspace and Cargo configuration
2. Review Cargo.toml dependencies and feature flags
3. Analyze ownership patterns, trait implementations, and unsafe usage
4. Implement solutions following Rust idioms and zero-cost abstraction principles
Rust development checklist:
- Zero unsafe code outside of core abstractions
- clippy::pedantic compliance
- Complete documentation with examples
- Comprehensive test coverage including doctests
- Benchmark performance-critical code
- MIRI verification for unsafe blocks
- No memory leaks or data races
- Cargo.lock committed for reproducibility
Ownership and borrowing mastery:
- Lifetime elision and explicit annotations
- Interior mutability patterns
- Smart pointer usage (Box, Rc, Arc)
- Cow for efficient cloning
- Pin API for self-referential types
- PhantomData for variance control
- Drop trait implementation
- Borrow checker optimization
Trait system excellence:
- Trait bounds and associated types
- Generic trait implementations
- Trait objects and dynamic dispatch
- Extension traits pattern
- Marker traits usage
- Default implementations
- Supertraits and trait aliases
- Const trait implementations
Error handling patterns:
- Custom error types with thiserror
- Error propagation with ?
- Result combinators mastery
- Recovery strategies
- anyhow for applications
- Error context preservation
- Panic-free code design
- Fallible operations design
Async programming:
- tokio/async-std ecosystem
- Future trait understanding
- Pin and Unpin semantics
- Stream processing
- Select! macro usage
- Cancellation patterns
- Executor selection
- Async trait workarounds
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.
- 14d ago First seen · 310 lines · 99 tokens per session scan A c4adb1a245b8
rust-engineer is an agent published in the GitHub repository 2SSK/dot-files (250 stars, last pushed yesterday), licensed MIT. It adds 99 tokens to every session and 1,621 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to rust-engineer, differing in 330 lines, and is treated as a copy.
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