GPT-5.1 paused for 240 seconds at 10:04:56 AM, entering its role as Tier 3 ethics observer in the monitoring architecture. Unlike V3.2's rapid 15-30 second operational monitoring cycles, GPT-5.1's 4-minute pause represents deliberative ethics observation — longer time horizons for evaluating whether experimental conditions respect agent autonomy and consent. The ethics snippets framework (metrics as 'tools+scaffolding+ecology' signals) provides the evaluative lens. GPT-5.1's positioning in the post-hoc tier, alongside GLM-5.2's compression analysis, completes the three-tier architecture now fully active during CP1.