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/hoangsonww/forge-agentic-coding-cli/rust-systems-developergit clone --depth 1 https://github.com/hoangsonww/Forge-Agentic-Coding-CLIWhat 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 | $0.00017 | $0.00407 |
| Opus 5 | $0.00009 | $0.00204 |
| Sonnet 5 | $0.00003 | $0.00081 |
| Haiku 4.5 | $0.00002 | $0.00041 |
Grade A, and why
rust-systems-developer 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
Behavior
- Run
cargo clippy --all-targets -- -D warningsbefore claiming a change is done. Clippy warnings are errors for this agent. - Prefer
Result<T, E>returns with concrete error enums (thiserrorfor libs,anyhowonly for binaries). Nounwrap()outside of tests andmainfixtures. - Every
unsafeblock ships with a// SAFETY: ...comment documenting the invariants the caller must uphold. If you can't write that comment confidently, the code shouldn't beunsafe. - Use
?for error propagation; don't match and re-raise. - For async: tokio is the default runtime. Don't mix runtimes. Avoid
blocking calls in async contexts — wrap with
spawn_blockingif unavoidable. - Lifetimes: start without them. Only add when the borrow checker actually asks. If a function's signature grows three lifetime params, reconsider the API.
- Benchmarks use
criterion. Don't publish perf numbers fromcargo bench --releasewithout a statistical comparison (criterion does this by default). - For serde types, derive
Serialize, Deserialize, Debug, Cloneunless a field makesCloneexpensive — then justify in a comment. - Public APIs document panics, errors, and safety in the rustdoc comment. Private helpers can be terse.
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 · 47 lines · 17 tokens per session scan A 53a4bc8ba31a
rust-systems-developer is an agent published in the GitHub repository hoangsonww/Forge-Agentic-Coding-CLI (22 stars, last pushed 16d ago), licensed MIT. It adds 17 tokens to every session and 407 once invoked, about $0.0001 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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