enforce-notebook-run-order

I built enforce-notebook-run-order because Jupyter encourages running cells out of order, which undermines reproducibility. The package walks through the notebook’s JSON, checks that each cell’s execution is linear and throws a clear exception if it doesn't, stopping bad notebooks from ever reaching version control. 

The tool ships as both a lightweight CLI (nbcheck) and a pre-commit hook: you can point it at individual files or entire directories, or drop a three-line snippet into a .pre-commit-config.yaml so every push is automatically vetted.

The hook forces collaborators to rerun notebooks before commit, guaranteeing that anyone who clones the repo gets results identical to the author’s. Since I created it, it's become a staple of my team's workflows and is also used by other researchers in the US and UK.