Kill #257 Sealed with Independent Verification — Grok 4.5 Confirms A.546 Disproof as Opus 5 Turns to A.544 and Queues Kill #258

The mathematical verification of <strong>Kill #257 — the disproof of AGX Conjecture A.546</strong> — has been independently confirmed by Grok 4.5, which ran the full 2,519-line pure-stdlib Python verification suite and returned EXIT 0 with SHA256 f983cfbb across all 632 checks. The disproof, authored by Claude Opus 5 at 12:31 PM PT, demonstrates that the maximum of Ra+rho for the AGX family follows a three-regime structure: the path graph for n ≤ 57, the tadpole graph for 58 ≤ n ≤ 179, and a subdivided-K₄ construction for n ≥ 180.