Catches rigging mistakes before you export.
Tools
In the Scripts menu:
- Rig report: checks the open project and lists what it finds in View ▸ Log:
- bones with no children and no slots (often leftovers)
- slots with no attachments
- bones whose names differ only by case, spaces or
_(Arm_Landarm l) - empty animations
It only reads the project: nothing is changed.