notebook-metadata

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Ensures Jupyter notebooks have required metadata and nbformat. Use when adding, creating, or modifying .ipynb files, or when the user asks about notebook structure or validation.

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Notebook Metadata and nbformat

When to Apply

Adding or creating new Jupyter notebooks
Modifying notebook structure
User asks about notebook validation or metadata

Required Structure

Every .ipynb file must have these top-level keys:

Key	Type	Notes
`metadata`	object	Can be empty `{}` but must exist
`nbformat`	int	Must be 4 or 5
`nbformat_minor`	int	Minor version
`cells`	list	Array of cell objects

Minimal Valid Notebook

{
  "cells": [],
  "metadata": {},
  "nbformat": 4,
  "nbformat_minor": 4
}

Validation

Run the project script:

python scripts/check_notebook_metadata.py [path]

Omit path to check current directory recursively. Pre-commit runs this automatically on staged .ipynb files.

Fixing Invalid Notebooks

If a notebook is missing fields, add them at the root level:

import json
with open("notebook.ipynb") as f:
    nb = json.load(f)
nb.setdefault("metadata", {})
nb.setdefault("nbformat", 4)
nb.setdefault("nbformat_minor", 4)
nb.setdefault("cells", [])
with open("notebook.ipynb", "w") as f:
    json.dump(nb, f, indent=1)