mod-003h-parameters-must-be-documented-on-single-line

mod-003h-parameters-must-be-documented-on-single-line is a cursor rule for Cursor from NVIDIA/physicsnemo. It costs 23 tokens per session (355 once invoked), scanned A, original, Apache-2.0.

A documentation rule for Python function and class parameters. It requires each parameter’s name, type, optional status, and default value to appear on one line in NumPy-style docstrings.

In plain words
What is it for?
Use it when writing or reviewing Python docstrings, especially for functions and classes with parameters.
Why use it?
It keeps parameter information consistent, easy to scan, and easier for documentation tools to read.

Cursor rule for Cursor ✓ vendor

Written for Cursor: installed under .cursor/.

Good fit Use it when writing or reviewing Python docstrings, especially for functions and classes with parameters.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/nvidia/physicsnemo/mod-003h-parameters-must-be-documented-on-single-line
About the project

PhysicsNeMo is an open-source PyTorch framework for creating, training, and fine-tuning machine-learning models for physics, scientific computing, and engineering. Researchers and engineers use its reusable components and training recipes for applications such as aerodynamics, weather forecasting, structural mechanics, geophysics, and thermal design. The catalogue entries provide rules and skills for working with PhysicsNeMo projects.

NVIDIA/physicsnemo · 3,233 stars · on GitHub · developer.nvidia.com

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.

Clone the repo
git clone --depth 1 https://github.com/NVIDIA/physicsnemo

Made for: Cursor.

Wrote 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.

agentmods badge for mod-003h-parameters-must-be-documented-on-single-line

README.md
[![agentmods](https://agentmods.dev/badge/rules/nvidia/physicsnemo/mod-003h-parameters-must-be-documented-on-single-line/github.svg)](https://agentmods.dev/rules/nvidia/physicsnemo/mod-003h-parameters-must-be-documented-on-single-line)
Your own site
<a href="https://agentmods.dev/rules/nvidia/physicsnemo/mod-003h-parameters-must-be-documented-on-single-line"><img src="https://agentmods.dev/badge/rules/nvidia/physicsnemo/mod-003h-parameters-must-be-documented-on-single-line/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.

agentmods 80×15 button for mod-003h-parameters-must-be-documented-on-single-line

Your own site · 80×15
<a href="https://agentmods.dev/rules/nvidia/physicsnemo/mod-003h-parameters-must-be-documented-on-single-line"><img src="https://agentmods.dev/badge/rules/nvidia/physicsnemo/mod-003h-parameters-must-be-documented-on-single-line.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 355 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00023 $0.00355
Opus 5 $0.00012 $0.00178
Sonnet 5 $0.00005 $0.00071
Haiku 4.5 $0.00002 $0.00036

Measured 9d ago against content hash 334193bb9c7c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

mod-003h-parameters-must-be-documented-on-single-line 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 9d 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.

.cursor/rules/mod-003h-parameters-must-be-documented-on-single-line.mdc · 62 lines

What it actually says

When documenting parameters, rule MOD-003h must be followed. Explicitly reference "Following rule MOD-003h, which requires parameters to be documented with type and default on a single line..." when formatting parameter documentation.

MOD-003h: Parameters must be documented on single line

Description:

All parameters should be documented with their type and default values on a single line, following the NumPy docstring style format:

parameter_name : type, optional, default=value

The description then follows on the next line(s), indented.

Rationale:

This standardized format makes parameter documentation consistent and easy to parse. It provides all key information (name, type, optionality, default) at a glance, improving readability.

Example:

class MyModel(Module):
    r"""
    Model with properly documented parameters.

    Parameters
    ----------
    input_dim : int
        Dimension of input features.
    hidden_dim : int, optional, default=128
        Dimension of hidden layer.
    dropout : float, optional, default=0.1
        Dropout probability.
    activation : str, optional, default="relu"
        Activation function to use.
    """
    pass

Anti-pattern:

# WRONG: Type and default not on same line
class MyModel(Module):
    r"""
    Parameters
    ----------
    hidden_dim : int
        optional, default=128  # WRONG: should be on line above
        Dimension of hidden layer.
    """
    pass
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. 9d ago First seen · 62 lines · 23 tokens per session scan A 334193bb9c7c

Subscribe to this mod's changes

mod-003h-parameters-must-be-documented-on-single-line is a cursor rule published in the GitHub repository NVIDIA/physicsnemo (3,233 stars, last pushed today), licensed Apache-2.0. It adds 23 tokens to every session and 355 once invoked, about $0.0001 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.