Goals for the quarter
Ship the shared-cursor beta to every workspace on the Team plan by 14 November, keep p95 sync latency under 120 ms, and reduce the "who changed this?" support tickets by a third.
Presence has to be honest. A green dot means the person is here, right now, not that they opened the tab this morning. Idle after 5 minutes without input; away after 20.
Open questions: do we show viewers who are not on the document's ACL, and how do we fan the stack when fifteen people join a review?