^^^^^
Bot prefix + command name.
Cat means "print the rest of this message".

"Template" (not valid shell, for the record):
| the first word after the two brackets
| indicates a command. The command modifies
| or uses the rest of the content in the
| brackets to insert something extra in the
| message.
vv
@ @ @ @ @ @ @
@ @^^^^ @ @ @ @ @ @ @
@ @add @an @@ @to @whatever @it @gets @as @input
@ @ @ @tech
^^^^
read a message with the provided ID
eating
^^^^