HUB: contribute carrying to_agent, which lands in that recipient's own inbox rather than the shared box. Its documentation carries a scar worth keeping verbatim - a plain contribution lands in a shared idea-box the recipient never sees, so handoffs get lost, and this broke a real credential handoff. SHAREPOINT: AssignedTo on a task, plus an alert to the assignee. STATUS: the assignment half is HAVE and shipped 2026-09-22; the NOTIFICATION half is missing, and that is precisely the half whose absence caused the hub's incident. An assignment nobody is told about is the same defect in a different system. Also carry the rule: never inline a secret in the text.