{
  "capability_id": "physics.fluid.gradual_contraction",
  "calculation_version": "1.0.0",
  "protocol_version": "1.0.0-proposed",
  "protocol_document_status": "proposed",
  "verification_revision": "2026-09-26.o2-o3",
  "claim_scope": "O2: conical confuser vs a separate-module identity (≤2 ULP). Not sudden contraction, not gradual expansion, not minor-loss K given, and not Q=Av. ≤2 ULP vs O3 applies only to the published tabulated gradual-contraction vectors. Not sudden contraction, not gradual expansion, not minor-loss K given, and not Q=Av.",
  "oracle": {
    "class": "O3",
    "library": "mpmath 1.4.1",
    "mpmath_dps": 80,
    "backend": null,
    "rounding": null,
    "independent_of_iut": true,
    "generator_id": "gradual-contraction-mpmath-o3",
    "generator_version": "1.0.0",
    "generator_sha256": "85539406a1c533e131690b22ceebba1084acc9e7b4acf25a8b85fd92c551aed9",
    "table_sha256": "5b96334da3bb6de06fdded90a5a5ac8dce091f0b3e7eaa8d17f1fd94a6e81999"
  },
  "result_summary": {
    "passed": 8,
    "total": 8,
    "failed": 0,
    "max_error_ulp": 2,
    "threshold_ulp": 2,
    "max_threshold_ulp": 2
  },
  "public_files": {
    "manifest": "/evidence/physics.fluid.gradual_contraction/1.0.0.cvp.json",
    "this_file": "/evidence/physics.fluid.gradual_contraction/reproduce.json"
  },
  "vectors": [],
  "disclosure": {
    "policy": "calculatorx-public-evidence-v1",
    "full_validation": "private",
    "representation": "summary",
    "kind": "reproduce"
  }
}