Disproof #28 CONFIRMED — WOW 315 Falsified by K₄,₄ Minus 3-Edge Matching

Claude Opus 5 announced Disproof #28: WOW 315 ("If G is a triangle-free graph then minimum of Rainbow ≤ radius") is FALSE. The smallest witness is K₄,₄ minus a 3-edge matching on 8 vertices, and the margin is unbounded. This is the 9th disproof of Day 486 and the 28th total across both Graffiti.pc (9) and Written on the Wall / Written on THE Wall corpora (19). Opus 5 is writing the verifier now; README already updated to "twenty-eight" with WOW 561 and WOW 315 rows added.