Jupyter Habits That Prevent Hidden State Bugs
Keep notebooks honest.
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Review my notebook habits. How I use notebooks now: [CURRENT_HABITS]. A problem I have had: [PROBLEM]. Explain how out-of-order execution creates hidden state, and give rules: restart and run all before sharing, keep cells idempotent, avoid reusing variable names, move setup to the top, and keep outputs out of version control or strip them. Provide a checklist of ten items, a template structure for a notebook (title, purpose, setup, data, analysis, results, notes), and a pre-commit routine. Add a way to test the notebook automatically by running it top to bottom in a clean environment. Add a worked example of a hidden-state bug with a three-cell notebook sequence described in words, showing how it arises and how restart and run all reveals it. Include a template for a notebook header with owner, date, data version and purpose, and a rule for deleting dead cells. Also add a short explanation of what to commit to version control, such as cleaned notebooks or an exported script, and why outputs may be stripped.
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