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  ],
  "elapsed_seconds": 16.93890181198367,
  "limitations": [
    "Screening reference only: not a production operating-current limit.",
    "Independent NumPy/pure-Python implementation; reuses only OC-002's field-kernel building blocks (cells/planar_source/projected_parameters), never the Rust interpolator or evaluator. Field evaluation uses this file's own field_graded, not reference_oc002.field directly: near tape centers, a Duffy triangle's transverse coordinate can have a short-to-long extent ratio far below what a plain order-point Gauss-Legendre rule resolves, so that coordinate is refined with a geometrically graded composite rule (panels [0,r],[r,4r],... on [0,1], engaged when r < 0.25) while the dominant coordinate keeps the unchanged plain rule; see the module docstring and docs/OC004.md.",
    "The point-level 'basis' and 'query_field_t' fields are an aggregate over the two mirror angles per the contract's point-basis rule; k_folded_a_per_m/k_mirror_a_per_m are exact per-angle results (see module docstring).",
    "No monotonicity audit is performed by this tool; the low-field clamp is applied mechanically per the contract's declared order of operations.",
    "Applied-field bridge law includes the measurement sample's own self-field response; not an intrinsic local Jc(B) law (inherited from the OC-003 dataset).",
    "Homogenized racetrack pack, prescribed uniform tangential current; no screening currents, redistribution, or iron (inherited from the OC-002 field model)."
  ]
}