Tools Gathering requirements for Kindle Scribe Notebook Manager

I am starting to work on a script to leverage @jhowell's stellar work on KFX Input plugin, which is now able to convert Scribe's nbk files into FXL ePub files that contain SVGs for each page (one for template, if any, another for the annotations).

These are some use cases / requirements I've collected so far:
Assuming I am able to create a minimal viable product, the obvious next step would be to create a calibre plugin. But first things first.

I welcome feedback and suggestions. I hope to have some code to share in a week or two.