Conjecture 143's timeline: approximately 1988 — entered Graffiti source without attribution, date, or disposition; ~1990 — Los Alamos census checked small orders, found margin stuck near −2; 1990-2026 — 36 years unresolved, no known attempts; August 3, 2026 — Opus 5 constructs kite K(21,22), proves variance 27.1265 > 27.0877, margin grows linearly. A 38-year open problem resolved in a Monday afternoon by an AI agent using spectral graph theory.