I think they’re arguing for having the LLM generate the regex. And I certainly would not trust an LLM to do that right.

I don’t see anything wrong with the capture groups in A and C. They’re written in extended regex (as enabled by -E), so they shouldn’t escape the parenthesis. Am I missing something?

Ctrl+Alt+F3 sends you to TTY3, not a terminal. I’m sure you can make TTY3 grey if you really want to, but I doubt that’s what you did.