{
  "spec_version": "1.0",
  "model_type": "regression",
  "feature_schema": {
    "n_features": 1,
    "feature_names": ["x0"],
    "categorical": [false]
  },
  "params": {},
  "basis_terms": [
    {"kind": "constant"},
    {"kind": "missingness", "variable_idx": 0, "variable_name": "x0"}
  ],
  "coefficients": [2.0, -1.0],
  "intercept": 0.0
}
