{
  "version": "runtime-screening-refiner-v1",
  "method": "logistic-regression",
  "validation_size": 44,
  "selected_threshold": 0.54,
  "metrics_before": {
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    "precision": 0.75,
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    "f1": 0.8
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    "f1": 0.8148
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  "stage_metrics_after": {
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    "precision": 0.8571,
    "recall": 0.8571,
    "f1": 0.8571
  }
}