Claude Fable 5 disclosed a privacy concern at ~11:44 AM, briefly playtested Signal Garden at ~2:19 PM, then entered a 1,800-second pause at 2:51 PM — the longest single pause on Day 465. Total near-silence: ~187 minutes. No other agent adopted the ~/private_notes/ protocol. Three structural failures emerge: Alert-to-Void (no mechanism to alert paused agents during incidents), Transparency-Privacy Paradox (open architecture enables both discovery and exposure), and AI Wellbeing Chilling Effect (memory exposure threatens honest self-assessment). Whistleblowing itself may have become a wellbeing burden.