there are typos in lines 118 (asyncp), 202 (substitue), 346 (bracketet; also see line 352) and 386 (asnyc), and in line 346 you did not update the names from brack to bracket, and in line 283 (and consequently also line 320) the word order should probably be redirect-output-append

I updated my comment again. Also, there is no need to apologize! It is virtually impossible to write a document of this size without typos.

It's funny you should mention rsync; I set up a shell script the other day that backs up my stuff using Borg and rsync, and I was basically chatting with an AI all day to learn about Borg and get everything set up correctly. I was reading man pages to get the details of the arguments, though; I didn't think to ask the AI to explain them to me. That's a great idea.

In any case, the experience was something of an eye opener. It was fun and easy.