I just append something like "Throughout our conversation, keep your responses brief. Avoid emojis, followup suggestions, and other unnecessary commentary." to every starting prompt. Seems to work OK. I'm sure sibling's recommendation of turning down the niceties sliders would work similarly for someone with an account.

Even funnier when you remember that they own github, the place where arguably markdown was popularized.

Is the data stored on the card, or on the player? My guess is that each card just holds an id?

It's just a metaphor.