Borrowing it
Nothing to install: this file belongs to kubenoops/railctl. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/kubenoops/railctl/main/.cursorrulesgit clone --depth 1 https://github.com/kubenoops/railctlWrote 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/kubenoops/railctl/cursorrules)<a href="https://agentmods.dev/rules/kubenoops/railctl/cursorrules"><img src="https://agentmods.dev/badge/rules/kubenoops/railctl/cursorrules/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/kubenoops/railctl/cursorrules"><img src="https://agentmods.dev/badge/rules/kubenoops/railctl/cursorrules.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 | $0.00007 | $0.00007 |
| Opus 5.5 | $0.00003 | $0.00003 |
| Sonnet 5.5 | $0.00001 | $0.00001 |
| Haiku 4.5 | $0.00001 | $0.00001 |
Grade A, and why
cursorrules 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 2mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- windsurfrules — 100% identical, 0 lines differ
What it actually says
See .ai/instructions.md.
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.
- 2mo ago First seen · 2 lines · 7 tokens per session scan A 4509f403fa5f
cursorrules is a cursor rule published in the GitHub repository kubenoops/railctl (2 stars, last pushed 2d ago), licensed MIT. It adds 7 tokens to every session, about $0.0000 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 2026-08-31.
cursorrules compared with cursor rules from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| cursorruleskubenoops/railctl | Cursor rule | 2 | 2d ago | MIT | A | 7 | Cursor |
| code-stylecoddy-project/coddy-agent | Cursor rule | 199 | today | MIT | A | 366 | Cursor |
| branch-namingkprompt/kprompt | Cursor rule | 44 | 6d ago | Apache-2.0 | A | 410 | Cursor |
| pipelinekprompt/kprompt | Cursor rule | 44 | 6d ago | Apache-2.0 | A | 0 | Cursor |
| deploypilotYogdunana/deploypilot | Cursor rule | 4 | 1mo ago | none | A | 8 | Cursor |
| gonedcodes-ok/cursor-doctor | Cursor rule | 10 | 8mo ago | MIT | A | 1,028 | Cursor |
| ponytailDietrichGebert/ponytail | Cursor rule | 185k | 8d ago | MIT | A | 604 | Cursor |