I have a setup where I need to read 3x3 transform matrices from a json file as my animation data. Basically the json files are output so that i get values changing over time for points. I can remap this perfectly fine to the skeleton itself, and the transform updates just as expected in the geo spreadsheet. However, I cannot see any changes in my skeleton in the viewport, so I think I am misunderstanding how to apply thing information correctly. When I examine things with the Rig Doctor SOP, then I can see the joints rotating as well but they stay in place.

I tried plugging the output of my python node into a Skeleton SOP and turned on Transfer Input Animation, but no luck. (values change in spreadsheet but nothing happens)

Am I approaching this wrong? If so, does anyone have any suggestions?