Private
Public Access
is_archived was previously only exposed on the admin-only AdminRoom schema and checked in one place (excluding a room from Browse rooms) -- for anyone already a member it was a complete no-op: still in their sidebar, still fully postable, no indication anywhere it was archived. Expose is_archived on the regular RoomRead/MyRoomItem schemas, drop archived rooms from the sidebar list (while keeping them directly reachable via URL so history stays readable), and reject new messages in one -- both the WS "message" handler and incoming webhooks -- with a clear "archived and read-only" response instead of silently no-op'ing or a confusing membership error. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>