My first experience with #chatgpt5.
I queried how to write some #python code to write out unformatted, binary files so my #fortran code could read it.
Proceeds to give me a load of #NumPy code. Completely neglects to mention the #SciPy FortranFile class that can trivially read and write, and appears on the first page of a search.
This is going to be a bumpy ride!