Classes
A class is who a group-scoped event is about. A static class keeps a list you add to; a dynamic class holds whoever's attributes contain its filter, so nobody keeps it up. Beside the classes somebody keeps are temporary lists, picked by a person for one send: you can see them, but a key cannot change one and an event cannot name one. In the High school pack a class is, for example, “5A”.
PATCHUpdate a class
Requires groups:write. Send only what changes — except attributes, which is replaced whole. kind and member_kind never change: make a new class instead. A body that changes nothing is refused.
200 with the updated class. 409 on a temporary list, which a key cannot change.
One class: the same fields in every pack. Press Response on the sample to see one whole.
On failure the body is { error, code } instead.