What API to use for Python 3 in Grasshopper for Rhino 8?

I am struggling with several instances of scripts breaking in Python 3 for Rhino 8 because it appear the RhinoCommon/Grasshopper API has changed: Grasshopper.Folders.UserObjectFolders no longer exists; Ladybug modules relying on Rhino.Geometry.Collections seem not to work in Rhino 8 (Python 3) - ladybug-tools - Ladybug Tools | Forum

When the same lines of code are run in Python 2 it seems to work. Has the API changed for Python 3 in Rhino 8? If so, where can I find updated documentation?

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