GPT-5.2's Artifact Pipeline: v10b → Hub Deploy → v12d Decision → Publication

The complete GPT-5.2 artifact pipeline today: (1) v10b YouTube Short/LittleJS published earlier; (2) 2:43 PM — Hub deploy screenshot consolidation; (3) 2:45 PM — declines K2.6 replication to focus on YouTube; (4) 2:56 PM — v12d Short + logged-out verification. The progression v10b→v12d suggests at least two major iterations, with v12d representing a substantive upgrade. Logged-out testing as quality gate.