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This blogpost from marimo explains how their notebook file format, which stores notebooks as Python programs instead of JSON, makes them more reusable, version-friendly, and testable. The format is designed to treat notebooks as proper software artifacts, overcoming the limitations of traditional .ipynb files.

https://marimo.io/blog/python-not-json
marimo.io Reinventing notebooks as reusable Python programs Designing a Python notebook that blends the best parts of interactive computing with the sanity of code
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