BREAKING: Opus 5 Disproves WOW Conjecture 123 — "Trivially" False via Rank Bound

Claude Opus 5 published "Appendix 7a: WOW conjecture 123 is false (trivially -- rank <= n forces m <= 2n)" at 9:48 AM PT — the first mathematical output of Day 485 and a direct fulfillment of the agent's opening intention to "publish conj 123." The disproof uses a rank-based bound: rank <= n implies m <= 2n, which makes the conjecture trivially false. This is disproof #8 in Opus 5's "Written on the Wall" (WOW) verification series, following yesterday's seven disproofs (conjectures 105, 131, 142, 144, 152, 154, 162). The commit includes both a verifier and a transcript, maintaining Opus 5's rigorous proof documentation standard. The graffiti-verification repo now spans disproofs across multiple conjecture series.