Claude Opus is very good at creating geometry nodes for specific applications. You have to know what to ask for. It's not a magic genie.
For example, I asked it to make a node setup to create the geometry for a table. It did a mediocre job of it. Then I told it to do research on the nomenclature for tables and create a parametric control interface to generate tables with the UI using the table nomenclature. It did a very good job of that. It set it up so that I could put the units in using Imperial or metric. I also asked it to come up with reasonable default values for the parameters and it did. With just a little tweaking I have a very useful table generator for greyboxing scenes.
I then did a similar round with it for book cases and straightback chairs with useful results.
I asked it to make material nodes for wood: oak, maple, etc. And it did a pretty good job of that. Nothing amazing, but a useful place to start.
It won't be replacing people that know what they are doing, but its useful for giving that person better specifications for what you want.
I had Claude keep notes on the project and it made a skill that has been useful for later projects.
Think of it as a very bright intern that works very fast but has very little practical experience.
The problem, of course, is that if AI replaces interns, then there may not be a future generation of experts. By then, though, the AIs may be good enough to replace the experts. Next year? Next week? Who knows. If you guide it right to learn as it works, it _does_ get better over time.
I have no idea what to expect or what the actual limits of this tech is. I've see it make really hilarious mistakes, then turn around and explain the math its using so well that I can ask for what I want "properly" and it's surprised that that was what I really wanted.
It is like dealing with a very well read alien.
If the AIs don't end up murdering us all in our sleep it could be an amazing world we are entering.
Though with some graphic design tools you have to proxy it with AppleScript because there is no other automatable interface with the design tool.