{
  "family": "uncertainty_propagate",
  "generator_id": "uncertainty-propagate-mpmath-o3",
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  "seed": "20260916.uncertainty-o3",
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  "precision_bits": 265,
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  "notes": "Linear GUM u_c from high-precision hypot/RSS; independent of Node Math and the IUT. Not Monte Carlo.",
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      "id": "o3-budget",
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          {
            "name": "drift",
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}