Something like this should probably go in the README or sphinx docs, via tim.graham@mongodb.com 

"We will follow Django's branch naming. Before merging Django 5.1 support, we create a stable/5.0.x branch. main will support Django 5.1 until Django 5.2 is released, at which point we create stable/5.1.x, etc. main tracks the last stable release of Django. For testing with Django main, this will be the next "add support for Django X.Y" draft PR."