I am developing a minimal sketch plugin and want to provide IFC functionality for that as well. I mean in general it would be useful to export rhino models in IFC file. I think of a simple translator where users could specify the Class of object eg.: wall, slab, etc. by click and who knows what additional options are necessary. I could imagine that one of the script is dedicated to create an element such as wall and it would associate wall class. In the other hand a simple object modelled in rhino such as a radiator would be manually ordered to the Heating system component class.
I am currently checking XBIM https://docs.xbim.net/index.html
In the past I planned to use GeometryGym but it is not opensource anymore?
COBie and other BIM file formats are still interesting.