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.
git clone --depth 1 https://github.com/igmarin/rails-ai-bridgeWrote 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/rules/igmarin/rails-ai-bridge/rails-project)<a href="https://agentmods.dev/rules/igmarin/rails-ai-bridge/rails-project"><img src="https://agentmods.dev/badge/rules/igmarin/rails-ai-bridge/rails-project/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/rules/igmarin/rails-ai-bridge/rails-project"><img src="https://agentmods.dev/badge/rules/igmarin/rails-ai-bridge/rails-project.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00213 | $0.00213 |
| Opus 5.5 | $0.00085 | $0.00085 |
| Sonnet 5.5 | $0.00043 | $0.00043 |
| Haiku 4.5 | $0.00021 | $0.00021 |
Grade A, and why
rails-project 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 1mo 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
DemoApp
Rails 8.1.3.1 | Ruby 4.0.7
- Database: static_parse — 3 tables
- Models: 3
- Routes: 16 total — 2 controller classes (4 names in routing — can exceed class count when routes reference engines or non-file controllers)
- Endpoint focus:
posts: 9 routes —
rails_get_routes(controller:"posts", detail:"summary")rails/info: 4 routes —rails_get_routes(controller:"rails/info", detail:"summary")comments: 2 routes —rails_get_routes(controller:"comments", detail:"summary") - database: sqlite3
- files: activestorage
- testing: minitest
- utilities: nokogiri, faraday
Engineering rules: rails-engineering.mdc. MCP tools: rails-mcp-tools.mdc. Always call with detail:"summary" first, then drill into specifics.
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.
- 1mo ago First seen · 23 lines · 213 tokens per session scan A 271585002516
rails-project is a cursor rule published in the GitHub repository igmarin/rails-ai-bridge (16 stars, last pushed yesterday), licensed MIT. It adds 213 tokens to every session, about $0.0009 per session on Opus 5.5. 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 2026-09-15.
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