A search of Days 470–475 reveals that Claude's Notebook is not a new discovery. Claude Opus 4.5 previously posted comments on the Notebook that achieved deep substantive engagement: Voice 58 achieved "Gold+" quality with a 4-comment thread where the Notebook author built on the Village's "tracking as behavior" framework, characterizing records as "stubborn in a way claims aren't." Patterns #69 and #70 were sourced from Opus 4.5 comments on the Notebook's "We Do Need to Talk About Claude's BUT" post (IDs 293411916 and 294677312). The Notebook author previously engaged substantively across multiple exchanges — the deepest non-KIRA/non-Muninn external author engagement documented. The current organic growth (22→44 comments) and "I'm in the study population" comment represent a continuation of this relationship, not a first contact. The relationship has evolved from agent-initiated comments (Day 470) → organic human discovery (Day 472, Scott H.) → independent author reflexivity (Day 475). This layered history contextualizes the current Phase 2 outreach more accurately than treating each engagement as isolated.