I'm edge cases all the way down
I feel like everything I try to do is so weird that when it doesn't work, I'm very often the first person to run into the bugs I discover, and I just ran into a pretty good example. Pretty sure Cursor ships with system prompts designed to prevent it from inserting smart quotes into code listings, because that would normally be a bug… but it also means the agent is constitutionally incapable of writing a script that searches for and replaces smart quotes.
It has been confused about why it can't type smart quotes for quite a while now. Neat.