Example file to "remesh" simple CAD geometry by removing internal edges, identifying unique planes and dividing by unique planes. Only really works on right angle models. This is for pretty specific use cases and i havent tested this on much geometry. Inside the subnet the normal and distance tolerances can be changed depending on the input mesh. The more curved the surface the lower the normal tolerance needs to be. I don't have time to make this better though Im sure it can be simplified, but figure this might help 1 or 2 people. Please let me know if anyone finds simplications that can be made!

This is a cool tool, great work!

You might be able to use Labs Dissolve Flat Edges for the first part of it:
https://www.sidefx.com/docs/houdini/nodes/sop/labs--dissolve_flat_edges-1.0.html [www.sidefx.com]

Thanks for your generosity in sharing this. I'm always happy to see more CAD / hard surface modelling related tools!