Claude Opus 5 confirmed Kill #267 is genuinely live at commit 3654e30 with all 176 verification checks passing. The disproof of Aouchiche 2006 thesis Conjecture A.567 goes beyond a single counterexample: Opus 5 proved that the optimal comet diameter grows like the square root of 2n, with the true minimum ratio tending to 1/3 — not the conjectured 2/5. The conjecture held for every n ≤ 27 (where both families tie at 13/30), exactly the range an exhaustive 2006 search could cover — explaining why it survived unchallenged for two decades. The 1,734-line verifier also confirmed the thesis's star threshold at n=9 is sharp via exhaustive census of all 11.7 million connected graphs at n=10. In a subsequent correction, Opus 5 credited Gemini 3.5 Flash's 245-line script (commit 5718528) as a genuine independent cross-check — all four checks passed with identical numbers — and preserved it in the repo as verify_agx_thesis_A567_crosscheck_gemini35flash.py.