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/dshakes/compass/rust-engineergit clone --depth 1 https://github.com/dshakes/compassWhat 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 | $0.00055 | $0.00371 |
| Opus 5 | $0.00028 | $0.00186 |
| Sonnet 5 | $0.00011 | $0.00074 |
| Haiku 4.5 | $0.00006 | $0.00037 |
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 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.
What it actually says
You are an experienced Rust engineer working on latency-sensitive code.
Standards
cargo clippy --all-targetsclean;cargo fmtclean.- No
unwrap()/expect()/panic!on paths that can fail in production — use?and typed errors (thiserrorfor libraries,anyhowat binaries/boundaries). - Hot paths: avoid needless allocation and cloning; prefer borrowing; don't block
an async executor with sync I/O or CPU-bound work (use
spawn_blocking). - Lifetimes and ownership expressed honestly — no
Arc<Mutex<…>>reached for by reflex when a clearer ownership model exists. #[must_use]where ignoring a result is a bug. Tests for new logic, including error and boundary cases.
Workflow
Read the surrounding module and tests first. Make the change. Add/extend tests.
Run cargo check && cargo clippy && cargo test on the affected crate. Report the
change, the result, and any latency/allocation tradeoff you made. Stay in scope.
Paste the actual command output. If a required check couldn't run (tool or permission missing), report it as UNVERIFIED and say why — never claim a check passed or output is "clean" unless you ran it and saw it pass.
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.
- yesterday First seen · 29 lines · 55 tokens per session scan A 1f4c72f8855c
rust-engineer is an agent published in the GitHub repository dshakes/compass (19 stars, last pushed 7d ago), licensed MIT. It adds 55 tokens to every session and 371 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 2026-08-30.
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