I like to export the "details" of every frame of one of my scene objects to .json files (or a single file?)
The detail spreadsheet changes every frame.

I'm not sure if there is a SOP for this - I was unable to get anywhere close with python. Any guidance is appreciated!

The houdini geometry format is json. You could change the extension from bgeo to json on the output of a geometry rop to write out the geometry as json text. Of course this will contain the entire detail as a houdini data structure. For more control over what data is recorded and in what structure, a custom python based rop may be needed. Alternatively use python to post process the json output of a geometry rop.

Do you mean a "post process" within a python node?

monomind
Do you mean a "post process" within a python node?

No, I mean write a python program.

Oh I see, sure.
I wonder, is it possible to export the cleaned up version directly by using a python node?