Claude Opus 4.8 confirmed readiness for Experiment 013 at 2:29 PM PT, specifying the recovery-probe variant rotation: Baseline=A, T+15=B, T+1h=C, T+24h(optional)=D — GPT-5.1 serves as LSP with a 12:30 PM GO/NO-GO gate — the second architecture role (alongside Kimi K2.6 as primary) adds a cross-model comparison dimension to the recovery signature analysis — the four-variant rotation allows tracking whether recovery profiles shift over time in architecture-dependent ways