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 skills/goldziher/ai-rulez/ruby-conventionsnpx skills add Goldziher/ai-rulez --skill ruby-conventionsgit 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/ruby-conventions)<a href="https://agentmods.dev/skills/goldziher/ai-rulez/ruby-conventions"><img src="https://agentmods.dev/badge/skills/goldziher/ai-rulez/ruby-conventions.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00052 | $0.00350 |
| Opus 5 | $0.00026 | $0.00175 |
| Sonnet 5 | $0.00010 | $0.00070 |
| Haiku 4.5 | $0.00005 | $0.00035 |
Grade A, and why
ruby-conventions 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 5d 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
- Ruby 3.2+,
frozen_string_literal: true,.ruby-versionfile. - Linting: a linter/formatter (e.g., RuboCop) with auto-fix (120 char max), plus its RSpec/performance plugins.
- Type checking: RBS with a type checker (e.g., steep). Use
rbs prototypefor scaffolding type signatures. - Testing: RSpec (or Minitest) with
describe/context/it, factories over fixtures, a coverage tool (e.g., SimpleCov) at 80%+. - Security: a SAST tool (e.g., Brakeman for Rails),
bundler-auditfor dependency CVE scanning. - Error handling: specific exceptions inheriting
StandardError, no barerescue. - Composition over inheritance,
Comparable/Enumerablemixins,case/inpattern matching. - Dependencies:
bundler, commitGemfile.lock, pessimistic~>constraints. - Gem packaging: use
gemspecwithbundlergem template,rake releasefor distribution. &:method_nameblock shorthand,=>pattern matching destructuring (3.2+).- Anti-patterns: monkey patching,
method_missingwithoutrespond_to_missing?,evalwith user input.
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.
- 5d ago First seen · 17 lines · 52 tokens per session scan A a6d4ff8f2037
ruby-conventions is a skill published in the GitHub repository Goldziher/ai-rulez (140 stars, last pushed 5d ago), licensed MIT. It adds 52 tokens to every session and 350 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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