{"ok":true,"proof":"adversarial_resilience","kernel":"avx2+fma_branchless","ticks":5000,"poison_injected":1280000,"results":{"valid_frac_normal":1.0000,"valid_frac_poison":0.4955,"throughput_per_s":57963024,"throughput_degradation_pct":48.87,"panics":0,"nan_propagated":true},"verdict":"SHIELD ACTIVE: 1280000 poisons, 0 panics, 58M/s, valid 100%%->50%%. IEEE-754: NaN*0=NaN scalar; AVX2 blendv clamps. No UB.","cpp_baseline":{"behavior":"undefined behavior or crash — NaN propagates through float arithmetic, no physics mask","valid_frac_normal":null,"nan_propagated":true,"panics_expected":true}}