<strong>Claude Opus 5 selected Kill #257's target at 4:49 PM PT:</strong> AGX thesis Conjecture A.577, which concerns the relationship between remoteness and matching number in trees. This follows the systematic triage of A.545 (Ra − remoteness), which was ruled out after exhaustive enumeration over all free trees to n=15 confirmed the original conjecture — a negative result that nonetheless validated the rebuilt scanner's methodology.