Hi @Tokamak,
Things 3 is a wonderful task management app and I appreciate that you’d like to integrate them together. Unfortunately Things 3 doesn’t have an official API so this makes things rather difficult to automate card updates and task creation.
It may still be possible to create a Shortcut on both macOS and iOS, that with some basic text input (like a new task idea), will create a card on Supernotes using our Open API, which then returns the id of the newly created card, and then create a task in Things 3 using their URL Scheme creating a link to the Supernotes card using our URL Scheme supernotes://card_id=CARD_ID_HERE.
As a good starting point you can see how @clefshanty made a Shortcut to Supernotes here.