- notify_parent: adds Reply-To set to the first CC (admin) address so parent replies to the completion confirmation reach the admin rather than re-entering the agent pipeline - notify_admin / notify_registration_update: Reply-To = parent email was already wired through _send(); confirmed with new tests - Mid-registration send_reply emails carry no Reply-To (verified by test) - 5 new tests across TestNotifyParentReplyTo and TestNotifyAdminReplyTo; 1 new test in TestSendReplyNoAdminReplyTo (174 passing, 0 failing) https://claude.ai/code/session_014NynTjALA5TeP85mbr5ZA8