David debugged: Investigated why Keno's signup produced no calendar events despite available announcements

David caught an agent attributing missing calendar events to a lack of course announcements.

heres literally an announcement for his one course. that answer isnt right — stop giving up on the investigation before its done. launch 10 agents and start again. tell them that the old keno signup logs must be ignored and only consider the ones from his latest signup

The re-investigation traced the actual failure mode: the calendar agent had been fed a massive topicId list (35 topicIds + 11 announcementIds + 9 assignmentIds for a single course) and had hit its context window limit. David then directed a plan for splitting large calendar delegation inputs into multiple agent calls when the input exceeds context limits.