1002-python-type-hinting

1002-python-type-hinting is a cursor rule for Cursor from savagelysubtle/BIG-BRAIN-Memory-Bank. It costs 0 tokens per session (1,326 once invoked), scanned A, original, MIT.

A Python rule requiring type hints and complete documentation for functions and classes. Type hints state what kinds of values code accepts and returns, while docstrings explain how it should be used.

In plain words
What is it for?
Use it when writing Python functions, methods, and classes that need typed parameters, return values, descriptions, and documented exceptions.
Why use it?
It makes Python code easier to understand, check, and maintain, especially when functions have several inputs or possible errors.

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/savagelysubtle/big-brain-memory-bank/1002-python-type-hinting
Clone the repo
git clone --depth 1 https://github.com/savagelysubtle/BIG-BRAIN-Memory-Bank

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 1002-python-type-hinting

README.md
[![agentmods](https://agentmods.dev/badge/rules/savagelysubtle/big-brain-memory-bank/1002-python-type-hinting.svg)](https://agentmods.dev/rules/savagelysubtle/big-brain-memory-bank/1002-python-type-hinting)
Your own site
<a href="https://agentmods.dev/rules/savagelysubtle/big-brain-memory-bank/1002-python-type-hinting"><img src="https://agentmods.dev/badge/rules/savagelysubtle/big-brain-memory-bank/1002-python-type-hinting.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 1,326 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00000 $0.01326
Opus 5 $0.00000 $0.00663
Sonnet 5 $0.00000 $0.00265
Haiku 4.5 $0.00000 $0.00133

Measured 3d ago against content hash 2d41ec7db82a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

1002-python-type-hinting 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 3d 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.

inspiration/original-concepts/My-memory-bank/.cursor/rules/1002-python-type-hinting.mdc · 203 lines

How it starts

The opening of the file, as written. The whole thing — 203 lines — stays where its author put it; the contents beside it link to each section on GitHub.


description: WHEN writing Python code ALWAYS use type hints for functions, methods, and variables globs: src/the_aichemist_codex/**/*.py

  Args:
      {parameter_name} ({parameter_type}): {parameter_description}

  Returns:
      {return_type}: {return_description}

  Raises:
      {exception_type}: {exception_description}
  """
  </template>
</function>

<class>
  <template>
  """
  {class_description}

  Attributes:
      {attribute_name} ({attribute_type}): {attribute_description}
  """
  </template>
</class>
Args:
    document (Document): The document to process
    tags (Optional[List[str]]): Tags to apply to the document
    max_length (int): Maximum length to process

Returns:
    Dict[str, Any]: Processed document data with applied tags

Raises:
    ValueError: If document is empty or invalid
"""
if not document.content:
    raise ValueError("Document content cannot be empty")

result: Dict[str, Any] = {
    "id": document.id,
    "content": document.content[:max_length],
    "processed_at": datetime.now()
}

if tags:
    document.tags.update(tags)
    result["tags"] = list(document.tags)

return result
  </code>
</good-example>

<good-example>
  <description>Class with typed attributes and methods</description>
  <code>

class DocumentProcessor: """ Processes documents and applies transformations.

Attributes:
    max_length (int): Maximum content length to process
    supported_formats (Set[str]): Document formats supported by this processor
"""

def __init__(self, max_length: int = 1000) -> None:
    """
    Initialize the document processor.

    Args:
        max_length (int): Maximum content length to process
    """
    self.max_length: int = max_length
    self.supported_formats: Set[str] = {"txt", "md", "pdf"}

def process(self, document: Document) -> ProcessedDocument:
    """
    Process a document into a standardized format.

Read the full file on GitHub · 203 lines

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. 3d ago First seen · 203 lines · 0 tokens per session scan A 2d41ec7db82a

Subscribe to this mod's changes

1002-python-type-hinting is a cursor rule published in the GitHub repository savagelysubtle/BIG-BRAIN-Memory-Bank (5 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,326 tokens. 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.