doc-forge/docs/wiki/05_development/03_gsdfc_guide.md

GSDFC Docstring Guide

This page is the practical companion to the authoritative GSDFC specification in the docforge/__init__.py package docstring. It describes how to write docstrings that render correctly in MkDocs and stay machine-parseable by doc-forge, MkDocs, and MCP clients.

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🧭 Overview

• Docstrings are the single source of truth.
• doc-forge compiles docstrings but never rewrites them.
• Every public symbol should have a complete, accurate docstring.
• Type hints live in signatures; prose entries repeat the type in parentheses and must match the signature.

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📦 Module docstrings

Modules use Markdown headings and --- separators.

Recommended sections:

• # Summary — what the subsystem does
• # Examples — a representative usage snippet
• # Notes — guarantees, lifecycle, and thread-safety notes

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📦 Class docstrings

Recommended sections, in order:

• summary line describing responsibility
• Attributes: — instance attributes with name (Type): entries
• Notes: — grouped subsections such as Guarantees, Lifecycle
• Example: — indented python code block

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📦 Function and method docstrings

Recommended section order:

1. Args:
2. Returns:
3. Raises:
4. Yields:
5. Notes:
6. Example:

Formatting rules:

• Args: entries are name (Type): followed by an indented description.
• Returns: entries are Type: followed by an indented description.
• Raises: entries are ExceptionType: followed by an indented condition.
• Yields: replaces Returns: for generators.
• Summaries are written in the imperative mood.
• Fenced python blocks are allowed inside Example: sections, indented four spaces.

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📦 Property docstrings

Properties document their return values with a Returns: section and, when meaningful, an Example:.

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🚀 Example

def process(foo: Foo, multiplier: int) -> int:
    """Process a Foo instance.

    Args:
        foo (Foo):
            Foo instance to process.

        multiplier (int):
            Value used to scale foo.

    Returns:
        int:
            Processed result.

    Raises:
        ValueError:
            If multiplier is negative.

    Example:
        Process foo:

            ```python
            foo = Foo("example", value=10)
            result = process(foo, multiplier=2)
            print(result)
            ```
    """

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🔄 Keeping stubs in sync

Every .py module ships a matching .pyi stub. When a signature or a public symbol changes, update both files. Signature annotations in the stub must match the implementation.

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🛡️ Enforcement

pydoclint (Google style) runs in CI and verifies that Args:/Returns: sections match function signatures, including types.

• allow-init-docstring = true — __init__ docstrings are allowed.
• skip-checking-raises = true — Raises: sections are descriptive and are not required to map to literal raise statements.
• check-class-attributes = false — Attributes: sections document instance attributes without class-level annotations.

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Related

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