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 rules/romkey/i2c-directory/ruby-stylegit clone --depth 1 https://github.com/romkey/I2C-DirectoryWhat 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 | $0.00000 | $0.00254 |
| Opus 5 | $0.00000 | $0.00127 |
| Sonnet 5 | $0.00000 | $0.00051 |
| Haiku 4.5 | $0.00000 | $0.00025 |
Grade A, and why
ruby-style 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
Ruby Style
Follow the project's .rubocop.yml conventions:
- Strings: Use single quotes unless interpolation is needed
- Line length: Max 120 characters
- Frozen string literal: Do not add
# frozen_string_literal: truecomments - Target Ruby: 3.3 — use modern Ruby syntax (pattern matching, endless methods where clear)
- New cops: All new RuboCop cops are enabled
Patterns
- Prefer
Hash#fetchwith defaults overHash#[]when a missing key is possible - Use keyword arguments for methods with 3+ parameters
- Keep controllers thin — extract logic to service objects or model methods
- Use
ActiveRecord::Enumfor status fields - Guard clauses over nested conditionals
# ❌
def process(member)
if member.active?
if member.paid?
do_work(member)
end
end
end
# ✅
def process(member)
return unless member.active?
return unless member.paid?
do_work(member)
end
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 · 43 lines · 0 tokens per session scan A e1347223fa26
ruby-style is a cursor rule published in the GitHub repository romkey/I2C-Directory (11 stars, last pushed 21d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 254 tokens. 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.
Other cursor rules, from other repositories
cursorrules
🚨 ABSOLUTELY FORBIDDEN: Direct python/python3 execution.
cursorrules
This is an embedded systems project for the ESP32-S3-Touch-LCD-1.85C device. All development must strictly follow the project constitution located at .cursor/rules.
angular-20
This rule provides comprehensive best practices and coding standards for Angular development, focusing on modern TypeScript, standalone components, signals, and performance optimizations.
dev-standard
Apache Superset development standards and guidelines for Cursor IDE.
typescript
Changes to these high-fan-out internals can affect every message, delta, element, or rerun. Keep work in them minimal, and benchmark changes with representative stress-test apps.
coolify-ai-docs
Master reference to all Coolify AI documentation in .ai/ directory.