This is one of those questions that makes me think “gee, why haven’t I ever questioned that?”
I can’t speak authoritatively, but I can say that both Django core and Django-extensions put utility classes in that directory. They’re imported by the individual commands.
The django.contrib.auth.management has some functions in
__init__.py, along with django.contrib.contenttypes.
So in terms of usage, it could be used for code that is needed by the commands, but aren’t commands themselves.
In my current set of virtual environments, those are the only projects using that directory.
A fairly cursory inspection of the (current) Django source doesn’t show any references to that directory outside the command processor.
From what I can find in the Wayback machine, the oldest reference to that directory is from 2007-11-07, with no indication as to any other purpose for that management directory.
If you go back to 0.96, there was a django.core management.py file - I’ll make the guess that all the commands were stored in that file before that component was refactored to allow for additional commands to be added more easily.
(Also interesting to me is that there’s an SO question asking about this a little more than 10 years ago. )