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 rustler-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/rustler-bindings)<a href="https://agentmods.dev/skills/goldziher/ai-rulez/rustler-bindings"><img src="https://agentmods.dev/badge/skills/goldziher/ai-rulez/rustler-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/rustler-bindings"><img src="https://agentmods.dev/badge/skills/goldziher/ai-rulez/rustler-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 | $0.00068 | $0.00335 |
| Opus 5 | $0.00034 | $0.00168 |
| Sonnet 5 | $0.00014 | $0.00067 |
| Haiku 4.5 | $0.00007 | $0.00034 |
Grade A, and why
rustler-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 10d 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
#[rustler::nif]for Elixir NIF functions. Use#[module = "Elixir.ModuleName"]for module naming. - Return tagged tuples:
{:ok, value}/{:error, reason}. Use Rustler encoders/decoders for type mapping. - Use
rustler::Errorfor NIF error handling. Map Rust errors to descriptive Elixir error tuples. - Keep NIF functions fast (<1ms) to avoid scheduler issues. Use
#[rustler::nif(schedule = "DirtyCpu")]for long operations. - Build with
mix compile(Rustler compiler). Test from Elixir using ExUnit. - Use
ResourceArc<T>for sharing Rust state across NIF calls. ImplementDropfor cleanup. - Use
#[derive(NifStruct)]and#[derive(NifUnitEnum)]for Elixir-compatible types. - Keep Elixir NIF wrapper thin — business logic in Rust, Elixir provides functional API.
- Handle binary data with
BinaryandOwnedBinarytypes. - Anti-patterns: no panics in NIFs (crashes the BEAM VM), no blocking the scheduler, no I/O in NIFs.
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.
- 10d ago First seen · 16 lines · 68 tokens per session scan A df2357529075
rustler-bindings is a skill published in the GitHub repository Goldziher/ai-rulez (141 stars, last pushed 2d ago), licensed MIT. It adds 68 tokens to every session and 335 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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