[634636346]

I stand corrected. However, I still think he's using GPT to generate much of his content, and at most doing some post-hoc editing of it.

[tagawa]

It's hand-written by me although I'm sure the writing style could be improved a lot. My process for the tutorial posts is to come up with the simplest functional code I can (admittedly using ChatGPT to double-check it), and then write the text around the code examples. I try to keep the text relatively simple so that a) the code does the talking, and b) non-native English speakers can still understand.