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 skills add Goldziher/ai-rulez --skill extendr-bindingsgit clone --depth 1 https://github.com/Goldziher/ai-rulezWrote 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/skills/goldziher/ai-rulez/extendr-bindings)<a href="https://agentmods.dev/skills/goldziher/ai-rulez/extendr-bindings"><img src="https://agentmods.dev/badge/skills/goldziher/ai-rulez/extendr-bindings/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/skills/goldziher/ai-rulez/extendr-bindings"><img src="https://agentmods.dev/badge/skills/goldziher/ai-rulez/extendr-bindings.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00060 | $0.00345 |
| Opus 5 | $0.00030 | $0.00172 |
| Sonnet 5 | $0.00012 | $0.00069 |
| Haiku 4.5 | $0.00006 | $0.00034 |
Grade A, and why
extendr-bindings 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 11d 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
- Use
extendrcrate for Rust-R interop.#[extendr]macro on functions,extendr_module!for registration. - Type mapping:
Robjfor generic R objects,Doubles,Integers,Strings,Listfor typed access. - Return
Result<T, extendr_api::Error>for R error propagation. Use.into()for Rust-to-R conversion. - NA handling: use
Rfloat::na(),Rint::na()for missing values. Check with.is_na()before operations. - Build with
rextendr::document()in R for development,cargo build --releasefor production. - Package integration: use
usethis::use_extendr()for scaffolding. Maintainsrc/rust/in R package. - Test R-side with
testthat, Rust-side with standard#[test]. Userextendr::test()for integration. - CRAN compliance:
R CMD check --as-cranmust pass. No compiler warnings. Vendor Rust dependencies. - Keep R wrapper functions thin — heavy computation in Rust, R provides user-facing API with roxygen2 docs.
- Anti-patterns: ignoring NA values, allocating R objects in Rust threads, panics in
#[extendr]functions.
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.
- 11d ago First seen · 16 lines · 60 tokens per session scan A 1193bae8f8cc
extendr-bindings is a skill published in the GitHub repository Goldziher/ai-rulez (141 stars, last pushed 3d ago), licensed MIT. It adds 60 tokens to every session and 345 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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