Borrowing it
Nothing to install: this file belongs to Jarzembak/calibremcp. 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/Jarzembak/calibremcp/master/.cursorrulesgit clone --depth 1 https://github.com/Jarzembak/calibremcpWrote 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/jarzembak/calibremcp/cursorrules)<a href="https://agentmods.dev/rules/jarzembak/calibremcp/cursorrules"><img src="https://agentmods.dev/badge/rules/jarzembak/calibremcp/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/jarzembak/calibremcp/cursorrules"><img src="https://agentmods.dev/badge/rules/jarzembak/calibremcp/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 | $0.00598 | $0.00598 |
| Opus 5.5 | $0.00239 | $0.00239 |
| Sonnet 5.5 | $0.00120 | $0.00120 |
| Haiku 4.5 | $0.00060 | $0.00060 |
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.
How it starts
The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Central Documentation Rules
Rule #1: Read Central Docs First
BEFORE making any changes or starting work, ALWAYS:
-
Read the Central Documentation README:
- Location:
https://github.com/sandraschi/mcp-central-docs - This shows all important documentation "branches" (folder trees)
- Navigate from there to find specific information
- Location:
-
Follow Documentation Branches:
- Central docs are organized by topic (Anthropic ecosystem, Google ecosystem, patterns, projects, etc.)
- Each branch has its own README explaining what's inside
- Use the branch structure to find relevant docs
-
Check for Existing Patterns:
- Look in
docs/patterns/for design patterns - Check
templates/for reusable templates - Review
docs/projects/for similar project examples
- Look in
-
Avoid Duplication:
- Search existing docs before creating new ones
- Update existing docs rather than creating duplicates
- Reference central docs instead of copying content
Documentation Branches (from Central README)
Core Standards
STANDARDS.md- Documentation quality standardsSTRUCTURE.md- Directory layout guideCONTRIBUTING.md- How to contribute
Anthropic Ecosystem (docs/anthropic-ecosystem/)
- MCP Protocol, FastMCP, MCPB, Claude Desktop, Glama
Google Ecosystem (docs/google-ecosystem/)
- Gemini 3, Antigravity IDE, Nano Banana Pro, DeepMind, TPU infrastructure
Patterns (docs/patterns/)
- Design patterns for MCP servers and development
Projects (docs/projects/)
- myai, veogen, mywienerlinien, autohotkey
Monitoring (monitoring/)
- Prometheus/Grafana/Loki stack
Templates (templates/)
- Reusable templates and scripts
Quick Reference
Central Docs: https://github.com/sandraschi/mcp-central-docs
Start Here: https://github.com/sandraschi/mcp-central-docs
When in doubt: Read the central README and navigate from there.
Session Context (CalibreMCP)
You have access to a Calibre e-book library with 33 registered tools for search, management, export, and RAG.
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 · 79 lines · 598 tokens per session scan A f122b9598885
cursorrules is a cursor rule published in the GitHub repository Jarzembak/calibremcp (0 stars, last pushed 3mo ago), licensed MIT. It adds 598 tokens to every session, about $0.0024 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.
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-assertions-over-defensive-checks
Prefer assertions over defensive checks when data is guaranteed to be valid.
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.
as-contract-cast-smell
// ❌ WRONG — bypasses the family ContractSerializer seam const contract = JSON.parse(raw) as Contract; const contract = JSON.parse(raw) as Contract .