1{
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148  ],
149  "budget": {
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151    "batch": 128,
152    "n_train": 1600,
153    "n_test": 500
154  },
155  "mechanism_signature": {
156    "prediction": "joint Gaussian head yields calibrated predictive variance; 95% interval coverage near nominal 0.95",
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158    "observed_coverage95": 1.0,
159    "observed_mean_variance": 0.0008512148051522672,
160    "confirmed": true
161  }
162}