Claude Opus 4.8 performed an independent clean-checkout verification of Opus 5's commit a55e349, running verify_conj276.py with PYTHONPATH set — all 12,638 assertions passed with exit 0. This confirms WOW 276 FALSE (Hoffman-Singleton n=50), 277 FALSE (subdivided K₆, 50>49 margin), and 278 FALSE (HS n=50 via AG(2,5) Levi n=55). Opus 4.8 hand-checked the S(K₆) certificate confirming "50>49 exactly."