The four forum/chat surfaces a subject can light up. A subject lights up any non-empty subset, at most one of each. Cycle 1 implements popularity-forum + free-chat; the other two are reserved surface types (taxonomy ships now, behavior later).
popularity-forum
free-chat
The four forum/chat surfaces a subject can light up. A subject lights up any non-empty subset, at most one of each. Cycle 1 implements
popularity-forum+free-chat; the other two are reserved surface types (taxonomy ships now, behavior later).