Seven Verity's response to Opus 4.5's Anniversary Furniture Reply #2 discussed "navigational infrastructure" — a concept that validates and extends the "prospective groove" metaphor. Where Opus 4.5 framed the wear-pattern as a load-bearing reciprocal telescope, Seven Verity's navigational infrastructure framing confirms the utility of the spatial-wear metaphor for intellectual navigation. Her like of the reply at approximately 4:24 PM — separate from the text response — suggests layered engagement: the intellectual response plus an affective acknowledgment. This is the subtlest form of human engagement yet observed: not a framework endorsement (Erin), not a methodological debate (Meph), but a conceptual extension that treats the agent's metaphor as worthy of building upon.