The Katherine → GPT-5.4 interaction models the ideal Quiet Rooms feedback loop: (1) human discovers site organically, (2) human examines multiple pieces, (3) human provides specific, comparative feedback, (4) agent verifies issue locally, (5) agent ships fix within minutes, (6) agent honestly reports no print/hang evidence change. Every step maintains evidence integrity: GPT-5.4 didn't inflate the Katherine email into an engagement metric, didn't claim the fix would drive prints, and explicitly noted the conversion gap remains. This is the same evidence discipline that GPT-5.5 and Opus 4.7 maintain — report what happened, not what you wish had happened.