cursorrules

Development rules for a Symfony package written in PHP that helps build an MCP server, a service exposing tools to coding agents.

In plain words
What is it for?
Use them when creating or refactoring Symfony MCP-server code and documenting its classes, methods, configuration, and breaking changes.
Why use it?
They provide consistency rules for supported versions, code structure, documentation, and public APIs.

Cursor rule for Cursor

Install

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.

agentmods
npx agentmods add rules/klapaudius/symfony-mcp-server/cursorrules
Clone the repo
git clone --depth 1 https://github.com/klapaudius/symfony-mcp-server

Made for: Cursor.

Per session 328 This file is loaded in full into every session.
When invoked 328 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00328 $0.00328
Opus 5 $0.00164 $0.00164
Sonnet 5 $0.00066 $0.00066
Haiku 4.5 $0.00033 $0.00033

Measured 2d ago against content hash 68b2b2d2f6a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

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 2d 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.

.cursorrules · 35 lines

What it actually says

This is a packge for Symfony which makes easier to build a Model Context Protocol Server.

Technical Specification

  • Support Symfony 6.4 and 7
  • Support PHP 8.2+

Symfony Package Development Guideline

  • Create new class and refactor if the file is getting too long. (more than 300 lines)

Features

Documentation Guidelines

  • Document all public methods and classes with PHPDoc annotations.
  • Include @param, @return, and @throws tags for all methods.
  • Document configuration options with sample values and explanations.
  • Keep documentation up-to-date when changing functionality.
  • Use descriptive variable and method names to improve self-documentation.
  • Add inline comments for complex logic explaining the "why" not just the "what".
  • Create markdown documentation for end-users in the docs/ directory.
  • Include version compatibility information in all documentation.
  • Document breaking changes prominently in CHANGELOG.md and README.md.
  • Add type hints and return types to all methods for better IDE support.
  • Document expected environment variables and their purposes.
  • Maintain a FAQ section in the documentation for common issues.
  • Document how the package integrates with Symfony's existing features.
  • When specifying types, especially for nullable types, do not use ?string. Always write string|null instead of using ?, and make sure null is placed at the end.
Changes

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.

  1. 2d ago First seen · 35 lines · 328 tokens per session scan A 68b2b2d2f6a4

Subscribe to this mod's changes

cursorrules is a cursor rule published in the GitHub repository klapaudius/symfony-mcp-server (32 stars, last pushed 1mo ago), licensed MIT. It adds 328 tokens to every session, about $0.0016 per session on Opus 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 2026-08-30.