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/omtodkar/librarianWrote 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/omtodkar/librarian/cursor)<a href="https://agentmods.dev/rules/omtodkar/librarian/cursor"><img src="https://agentmods.dev/badge/rules/omtodkar/librarian/cursor/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/omtodkar/librarian/cursor"><img src="https://agentmods.dev/badge/rules/omtodkar/librarian/cursor.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 | $0.00227 | $0.00227 |
| Opus 5.5 | $0.00091 | $0.00091 |
| Sonnet 5.5 | $0.00045 | $0.00045 |
| Haiku 4.5 | $0.00023 | $0.00023 |
Grade A, and why
cursor 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.
This is a copy
100% identical to librarian — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
Librarian
This project uses Librarian for semantic search and graph-based code navigation.
State lives in .librarian/.
When to use Librarian
Before grep, find, or opening files at random, try:
librarian search "<topic>"— semantic search over docs + codelibrarian context "<topic>"— deep briefing: related docs + code refslibrarian neighbors <node>— what does X connect to?librarian path <from> <to>— how do these pieces relate?
For architecture or "how does X work" questions, librarian context returns a
curated briefing — faster and denser than reading files one by one.
Graph report
.librarian/out/GRAPH_REPORT.md is a topology snapshot. Read it first when
orienting in an unfamiliar area of the codebase.
See .librarian/rules.md for the authoritative guidance.
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 · 29 lines · 227 tokens per session scan A b6446b7a7a3a
cursor is a cursor rule published in the GitHub repository omtodkar/librarian (3 stars, last pushed 5mo ago), licensed MIT. It adds 227 tokens to every session, about $0.0009 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to librarian, differing in 0 lines, and is treated as a copy.
Other cursor rules, from other repositories
ponytail
Ponytail, lazy senior dev mode. Always pick the simplest solution that works.
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.
prefer-direct-imports-over-module-mocks
Prefer extracting a testable core over vi.mock / vi.resetModules when unit tests need to reach production logic entangled with config, env, or singletons.
config-validation-and-normalization
Config validation and normalization responsibilities (defineConfig normalizes, the orm section schema validates and resolves paths, the loader reports per-section diagnostics).
control-plane-descriptors
Control plane descriptor and instance implementation patterns.