{
  "id": "regime_meta_v1",
  "hypothesis": "A shallow walk-forward GradientBoostingClassifier metalabeling P(our ORB makes money THIS session) from the same free pre-open features beats the threshold_v1 rule net, out-of-sample, and zeroing the ORB on unfavorable sessions raises whole-population expR.",
  "population": {"min_entry_gap_pct": 0.10, "min_day_volume": 300000, "price_min": 2.0, "price_max": 20.0},
  "intervention": {"kind": "regime_gate", "model_version": "meta_v1"},
  "bars": {"expR_delta_min": 0.05, "min_n": 300},
  "fidelity": {"atr_frac": 0.25, "spread_mult": 3, "adverse_ticks": 1}
}