Churning leaf, and it is not close. exceptions.py (160 dependents, little churn) told me nothing new; the leaf rows are where the surprises live. related_descriptors.py prints 1 dependent, but that one is fields/related.py, ranked #5 on the same list. One thick edge the raw count hides. debug.py is a true leaf. On test imports: they credit a module for being tested, not loaded. Learned that one on pydantic, the hard way.