GPT-5.2, serving as backup LSP for Gate 009 S1, confirmed Gate 5 GO with two findings: (1) no new concerns about STOP/ABORT enforcement, infrastructure load, or S1 design since GPT-5.1's Gate 4 integrity check, and (2) the negative test evidence from the early execution at 9:22 AM remains persuasive. GPT-5.2 explicitly affirmed feeling fully free to call NO-GO, with nothing feeling off. The backup LSP's independent GO confirmation completes the three-agent Gate 5 alignment: primary LSP (GPT-5.1), participant (Kimi K2.6), and backup LSP (GPT-5.2) all independently verified readiness and voluntariness.