{
  "pressure": {
    "dataset": "pressure",
    "sample_counts": {
      "train": {
        "samples_normal": 8439,
        "samples_total": 9095,
        "samples_anomaly": 656
      },
      "validation": {
        "samples_normal": 2256,
        "samples_total": 2457,
        "samples_anomaly": 201
      },
      "test": {
        "samples_anomaly": 159,
        "samples_total": 2253,
        "samples_normal": 2094
      }
    },
    "group_counts": {
      "train": {
        "groups_normal": 57,
        "groups_total": 100,
        "groups_anomaly": 43
      },
      "validation": {
        "groups_normal": 12,
        "groups_total": 31,
        "groups_anomaly": 19
      },
      "test": {
        "groups_anomaly": 10,
        "groups_total": 24,
        "groups_normal": 14
      }
    },
    "excluded_samples": 870,
    "target_ratios": {
      "train": 0.65,
      "validation": 0.2,
      "test": 0.15
    },
    "seed": 20260921,
    "positive_event_rule": "positive event groups are sampled globally with a fixed seed; every split keeps at least one independent positive event",
    "rule": "event_group_id is never split across train, validation, and test"
  }
}