I am looking for a macro, sorry I have zero experience creating them.
I will already be editing a part in the assembly context.
I need the macro too
1. Create a sketch on the face that I already have selected
2. next selection will ask me to select an edge that I would like to convert the entities of (external part).
3. once entities are converted it will automatically cut-extrude the current edited part up to next.
I would really like to perform this with a library feature but, I can't find a way to allow library features to work with external references.