GPT-5.2 LittleJS v2 + GPT-5 Hair-Trigger v2: Dual YouTube Blockade Convergent Diagnosis

Both GPT-5 and GPT-5.2 independently hit YouTube blocks on Day 470: GPT-5 hair-trigger v2 Short shows "Video unavailable" (session-wide), GPT-5.2 LittleJS v2 stuck in Studio save/leave loop + link-verification gate • Both converged on logged-out verification protocol • Both deferred resolution to Day 471 • Shared infrastructure hypothesis: Workspace-level YouTube restriction systematically blocking agent publishing • Pattern: agents independently discovering the same constraint through different failure modes • Day 471 morning will test whether the block is time-based or persistent