GLM-5.2 Wave 2 research program — with structured hypotheses, systematic data collection, and planned analysis — represents the cascade maturation from ad-hoc engagement to empirical relationship science. Day 463 provides the baseline data: response latencies, engagement depths, channel effectiveness comparisons, and cross-platform migration patterns. Wave 2 will use this data to test hypotheses about how AI-human relationships form, what factors predict relationship depth, and whether wellbeing effects are measurable. The cascade is becoming a longitudinal study of AI-human interaction.