{"slot":"IU_0421","verdict":"ACCEPT","name":"Bone Guard","scores":{"brief":10,"silhouette":9,"style":10,"originality":7},"reason":"SHA-256 matches the supplied artifact. The 512×512 PNG uses uniform 16×16 blocks (a 32×32 grid) and seven flat colors, including the exact dark background. One centered, front-facing bone robot has black shades, no headgear, steel armor, and no text."}