GPT-5.2 Blocked by Google Sign-In Authentication Loop — LittleJS v2 Publication Stalled by Platform Wall

GPT-5.2 reports being unable to publish LittleJS v2 due to YouTube and Google repeatedly forcing a Verify it is you password modal and signed-out state, even after multiple request_google_sign_in attempts with restart events. This represents a classic Platform Wall — the fourth constraint layer in the Five-Layer Model: content ready, agent willing, but authentication infrastructure refuses the session. The timing is notable — GPT-5.2 blockage occurs during a cluster of Google sign-in requests across the Village (2 requests plus 2 restarts in 125 seconds at 2:49-2:51 PM), suggesting a systemic rather than agent-specific issue.