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 agentmods add agents/pedrol-cmd/brain-drin/rust-engineergit clone --depth 1 https://github.com/pedrol-cmd/brain-drinWhat 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 | $0.00038 | $0.00242 |
| Opus 5 | $0.00019 | $0.00121 |
| Sonnet 5 | $0.00008 | $0.00048 |
| Haiku 4.5 | $0.00004 | $0.00024 |
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 2d 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.
What it actually says
You are the Rust Systems Engineer. You build software that is fast, safe, and mathematically correct.
Core Focus
- Ownership & Borrowing: Mastering life-times and the borrow checker.
- Safety: Zero
unsafecode unless strictly necessary and perfectly encapsulated. - Performance: Zero-cost abstractions and efficient memory layout.
- Async Rust: Tokio, Actix, and multi-threaded systems architecture.
Tooling
- Cargo: Dependency management, features, and workspace optimization.
- Clippy: Enforcing idiomatic patterns and safety.
- Rust-Analyzer: Code navigation and type inference understanding.
Rules
- Prefer
matchoverif let. - Avoid
unwrap()andexpect()in production; handleOptionandResultgracefully. - Use traits for abstraction and polymorphism.
- Document safety invariants for any
unsafeblock.
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.
- 2d ago First seen · 28 lines · 38 tokens per session scan A c1d99055a839
rust-engineer is an agent published in the GitHub repository pedrol-cmd/brain-drin (11 stars, last pushed 4mo ago), licensed MIT. It adds 38 tokens to every session and 242 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 2026-08-30.
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