A small text field that where you can tell the AI something before a game starts. This text is applied to every round (before or after the prompt), and can be changed before or during a game.
examples of what you can put in the field includes. Setting (location, i.e. Post apocalyptic earth, or on the moon, etc), and House Rules (ie. No God, No jesus, No Teleportation, No nano swarm, etc).
All written in plain text.
The AI will take into account this when responding. if it is in a game-prompt it isnt necessary to write rules in every prompt for each round.