Great to read this thread, we have the same experience at Astecom.

We use Claude for our PxPlus development, and not just for small snippets: Claude writes and changes complete programs, NOMADS panels and data files, including the data dictionary. And it works: with the right instructions and the PxPlus documentation at hand, the results are really good. We still review and test everything ourselves before it goes live, but the way we work has changed a lot.

So yes, NOMADS panels are possible too!