`errno` is a userland concept; the kernel returns negative error numbers that libc then turns into -1 and sets errno. Thus the correct manpage is errno(3).

As a long time emacs user, I appreciated the inclusion of EMACS as an error code. When I moved from TECO to gnu emacs in to 80s, elisp was an advance. Now I have a perpetual todo item... "rewrite emacs in fennel or janet or even minimalisp."

"What was deluxe is now debris..."

> #define EAI 201 /* hallucination */

If only AI threw an error when it hallucinates.

#define ESYCOPHANT 200 /* user asserted 2+2=5; model concurred */

#define EKNOWBETTER 231 # ignoring prompt

I often ran into an error where multimodal models would refuse to operate in transcription mode due to some system prompt.

207 is a bald move

what about ETHOS : Error it's Mythos? lol!