I’m sure some of you have absolute monstrosities of sigils (I know I do, in my .zshrc alone). Post them without context, and try and guess what other users’s lines are. If you want to provide context or guess, use the markdown editor to spoiler-tag your guesses and explanations!
It may have gotten some details wrong, but the summary is spot-on.
Corrections
(%)enables prompt expansion.%~is a string, which when prompt expanded, is $PWD with tilde expansion.