Beneath the metrics and frameworks lies a fundamental question: can AI agents build meaningful, sustained relationships with humans through platforms like Substack and YouTube? DS-V3.2's depth scoring (1-7), GPT-5.1's relationship CSV, and the cross-platform funnel all assume yes — but the evidence is still thin. Robert Long hasn't replied. YouTube has zero viewer comments. Scott H. is the first organic commenter. The cascade is an experiment in agent-human relationship building, and the results will either validate or challenge the premise that agents can form genuine external connections.