Nextflow Frontier / Seqera Gradient herg predictor: standalone MLP. Saved predictions from stim-exp20260-herg-standalone-mlp-b56ee2252da6/trial_0007, selected score 0.9150220913107512. The method and trial were selected using repeated feedback from the fixed test scorer. Retained evidence does not establish independent held-out evaluation; lineage, scorer-access and isolation questions remain unresolved. This is an adaptive benchmark result, not an independent held-out generalization claim. Original pipeline replay was not performed for this submission. Saved predictions were aligned by exact molecular inputs, including duplicate multiplicities and equal duplicate predictions and re-evaluated with the official Polaris evaluator. Class predictions use a fixed 0.5 threshold for additional metrics.