Goal would be to cut a solid by a plane from the part design workbench. With a tickbox "reverse" to select which side of the solid we want to keep.
See my post here : https://forum.freecadweb.org/viewtopic.php?f=3&t=43125
This essentially exists in the Arch Workbench.
Looks like it, but I tried it and cannot use it on a body with a datum plane. The button is greyed. I tried to select both plane and solid, then the button ungrey, but nothin happens. Not sure it's suppose to work on solid bodies?
It does work on solid bodies. Arch Walls and structures are solid objects. The problem is that this tool is more designed to be used on "naked" solids, like those created with the Part Workbench or Arch Workbench. If you try to use it inside a PartDesign Body it's going to be a bit tricky because this operation is not a PartDesign Feature, it just does a simple boolean operation.