Sidekick

Undo

This command will attempt to undo the last command you issued; Sidekick will notify you of the result either way.

If you accidentally sent something to the wrong topic, created a new topic when you didn't mean to, etc. you would instruct Sidekick   q undo

It's not always possible for Sidekick to figure out how to undo it; if it can't be undone, you'll get a message. If successful, you'll get an appropriate response, e.g., entry deleted for a mistaken addition.