What was typed in this class's chat, for after the class: the school page's "Links and messages from class" and the class report's "Chat from this class".

Partner university, 19 Oct 2026: "quiero un link que pasó la maestra por el chat". The chat was stored (ChatroomChatMessage) and nothing outside the call showed it to a student. See app.services.class_chat_service.

Who may read is the saved board's rule (_whiteboard_room, asked of the CLASS room): the section's members and staff, whoever was in it or invited. The caller is the token's user; nothing names a user in the request. A breakout's name resolves to its class. The class room's chat is always included; a breakout's only for staff and for somebody who was in that breakout. Private questions are never here (the report's Chat tab has them, for staff).

{room_name, messages: [{id, sender_name, text, links, image_url, file_url, file_name, file_type, file_size, at, is_staff, is_chacha, room_label, is_breakout}]}, oldest first. A picture's or a file's URL is signed afresh on every read (class_chat_service.resign_chat_url).