{
  "protocol": {
    "name": "CVP",
    "version": "1.0.0-proposed"
  },
  "document_status": "proposed",
  "calculator": {
    "id": "coax-impedance",
    "version": "1.0.1",
    "title": "Coax Impedance Calculator",
    "formula_family": "coax-z0",
    "capability_id": "electrical.rf.coax"
  },
  "profile": "engineering",
  "status": "VERIFIED",
  "verification_status": "VERIFIED",
  "production_freshness": "CURRENT",
  "overall_trust": "VERIFIED",
  "runner": {
    "name": "cvp-runner",
    "version": "1.0.0"
  },
  "environment": {
    "runtime": "node",
    "runtime_version": "22.23.2",
    "numeric_model": "IEEE-754 binary64",
    "os": "linux"
  },
  "suite": {
    "id": "coax-impedance",
    "version": "1.0.1",
    "uri": "https://www.calculatorx.com/evidence/electrical.rf.coax/1.0.1.json"
  },
  "obligation_set": [
    "CVP-PROV-01",
    "CVP-MODEL-01",
    "CVP-SCOPE-01",
    "CVP-UNIT-01",
    "CVP-REF-01",
    "CVP-GOLD-01",
    "CVP-BND-01",
    "CVP-INV-01",
    "CVP-NUM-01",
    "CVP-COV-01",
    "CVP-CONTRACT-01",
    "CVP-DEP-01",
    "CVP-ART-01",
    "CVP-PROD-01",
    "CVP-DIM-01",
    "CVP-PROP-01",
    "CVP-META-01",
    "CVP-IFACE-01"
  ],
  "provenance": {
    "mode": "direct",
    "sources": [
      {
        "label": "David M. Pozar, Microwave Engineering",
        "kind": "other",
        "reference": "4th ed., Ch. 2 Transmission Line Theory — coaxial line"
      },
      {
        "label": "Robert E. Collin, Foundations for Microwave Engineering",
        "kind": "other",
        "reference": "2nd ed., coaxial transmission line"
      }
    ]
  },
  "reference": {
    "items": [
      {
        "class": "O1",
        "reference_scope": "model",
        "scope": "model",
        "label": "Coaxial line Z0 (TEM, μr≈1)"
      },
      {
        "class": "O2",
        "reference_scope": "expected_values",
        "scope": "expected_values",
        "label": "Separate-module coax-impedance oracle — same V8 binary64 as IUT",
        "engine": {
          "name": "coax-impedance-reference",
          "precision_bits": 53,
          "independent_of_iut": true
        }
      },
      {
        "class": "O2",
        "reference_scope": "numerical_behavior",
        "scope": "numerical_behavior",
        "label": "Same O2 module backs ≤2 ULP Z0 comparison vs IUT",
        "engine": {
          "name": "coax-impedance-reference",
          "precision_bits": 53,
          "independent_of_iut": true
        }
      }
    ],
    "notes": "Golden expected values use a separate O2 module (not IUT transcription). O2 shares Node/V8 binary64 with the IUT unless noted otherwise."
  },
  "controls": {
    "CVP-PROV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Sources present on evidence"
    },
    "CVP-MODEL-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Z0=(η0/(2π√εr))·ln(D/d) with μr≈1; D=shield ID, d=center OD"
    },
    "CVP-SCOPE-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Ideal TEM coax; homogeneous, lossless, non-magnetic dielectric (μr≈1); conductor loss and dielectric dispersion neglected. Omitted εr defaults to 1.0."
    },
    "CVP-UNIT-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Canonical D_m, d_m in metres; Z0 in Ω. Human UI may enter mm/cm/in."
    },
    "CVP-REF-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "O1 model + O2 expected_values + O2 numerical_behavior"
    },
    "CVP-GOLD-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "1/1 legacy golden; 1/1 oracle-backed numeric"
    },
    "CVP-BND-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "8/8 numeric-edge Evidence + 1/1 near-singularity numeric; illegal enum/system is Invalid only"
    },
    "CVP-INV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "8 Evidence illegal-input + 10/10 oracle-backed error-code (exact_error_match, not ULP)"
    },
    "CVP-NUM-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "max_error_observed_ulp=1; policy declared a priori"
    },
    "CVP-COV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "2/2 declared partitions (z0, invalid-domain) · 1 legacy golden / 9 CVP boundary unique cases · 8 Evidence invalid-input (may overlap boundary)"
    },
    "CVP-CONTRACT-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "4/4 CVP contract"
    },
    "CVP-DEP-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "engine coax-impedance; Node binary64"
    },
    "CVP-ART-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "release_integrity.status=verified · digests: artifact_evidence_sha256=Evidence core (Trust freshness) · cvp_evidence_digest=artifacts.evidence_digest (fingerprint v2) · evidence_bundle_sha256=legacy Evidence JSON bytes · evidence_catalog_digest=attested_catalog_sha256 · production_sha256=bound production report · see artifacts.digest_registry"
    },
    "CVP-PROD-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "this calculator CURRENT · bound snapshot pass @ 2026-09-12T12:38:39.657Z · live site-wide report stale @ 2026-09-12T12:38:41.385Z (1 other capabilities) · local checks pass · attestation_id=b30b8bdca55960eca0d1ed87faacf57e032642a354d4a8191673fb664ac0a8d1 · This calculator CURRENT · This calculator is not affected · Bound attestation PASS @ 2026-09-12T12:38:39.657Z · Current site report STALE (1 capability; 155 remain CURRENT) @ 2026-09-12T12:38:41.385Z · Public schema 1.0.1 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.0.1 · report output-const=pass · evidence-sha256=pass · semantic-contract=pass · capability-html-public-origin-agree=pass · cvp-manifest-public-origin-agree=pass · cvp-latest-alias-agrees=pass · calculator-html-cvp-projection=pass · evidence-html-cvp-projection=pass · attested_evidence_sha256=581d358397e61f3217fc34b45dc961d7afe2bb324ddc627607ceb8c3f18ca6f0 · verified_at=2026-09-12T10:37:16.262Z · evidence_attested_at=2026-09-12T10:37:16.262Z · last_confirmed_current_at=2026-09-12T12:38:39.657Z · rendered_at=2026-09-12T12:38:42.614Z · binds=cvp_core_sha256",
      "check_result": "PASS",
      "production_state": "CURRENT",
      "binding_current": true
    },
    "CVP-DIM-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "Characteristic impedance"
    },
    "CVP-PROP-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "5/5 property · enumerated fixed assertions (not generated; no seed)"
    },
    "CVP-META-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "2/2 metamorphic"
    },
    "CVP-ROUND-01": {
      "result": "SKIP",
      "applicability": "not_applicable",
      "notes": "No inverse / round-trip vectors in pack — control not in obligation set"
    },
    "CVP-XCAL-01": {
      "result": "SKIP",
      "applicability": "not_applicable",
      "notes": "No related calculator in the same formula family / no related-identity peers declared — control not in obligation set"
    },
    "CVP-IFACE-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "UI (SSR) · REST · MCP equivalent (MCP uses calc API handler). ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 1/1 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only."
    },
    "CVP-ORACLE-01": {
      "result": "SKIP",
      "applicability": "higher_assurance",
      "notes": "O2 present; O3 not required this wave"
    },
    "CVP-EXP-01": {
      "result": "SKIP",
      "applicability": "optional",
      "notes": "expert_reviewed=false"
    }
  },
  "tests": {
    "golden": {
      "passed": 1,
      "total": 1,
      "failed": 0,
      "case_ids": [
        "g-z0"
      ]
    },
    "boundary": {
      "passed": 9,
      "total": 9,
      "failed": 0,
      "case_ids": [
        "bad",
        "boundary-coax-eq",
        "boundary-coax-D-zero",
        "boundary-coax-d-zero",
        "boundary-coax-D-neg",
        "boundary-coax-d-neg",
        "boundary-coax-er-zero",
        "boundary-coax-er-neg",
        "bnd-air"
      ]
    },
    "invalid": {
      "passed": 18,
      "total": 18,
      "failed": 0,
      "case_ids": [
        "bad",
        "boundary-coax-eq",
        "boundary-coax-D-zero",
        "boundary-coax-d-zero",
        "boundary-coax-D-neg",
        "boundary-coax-d-neg",
        "boundary-coax-er-zero",
        "boundary-coax-er-neg",
        "inv-D-lt-d",
        "inv-D-eq-d",
        "inv-D-zero",
        "inv-d-zero",
        "inv-D-neg",
        "inv-d-neg",
        "inv-er-zero",
        "inv-er-neg",
        "inv-missing-D",
        "inv-missing-d"
      ],
      "comparison": "exact_error_match",
      "records": [
        {
          "id": "inv-D-lt-d",
          "comparison": "exact_error_match",
          "expected": {
            "code": "VALUE_OUT_OF_RANGE"
          },
          "actual": {
            "code": "VALUE_OUT_OF_RANGE"
          },
          "match": true
        },
        {
          "id": "inv-D-eq-d",
          "comparison": "exact_error_match",
          "expected": {
            "code": "VALUE_OUT_OF_RANGE"
          },
          "actual": {
            "code": "VALUE_OUT_OF_RANGE"
          },
          "match": true
        },
        {
          "id": "inv-D-zero",
          "comparison": "exact_error_match",
          "expected": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "actual": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "match": true
        },
        {
          "id": "inv-d-zero",
          "comparison": "exact_error_match",
          "expected": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "actual": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "match": true
        },
        {
          "id": "inv-D-neg",
          "comparison": "exact_error_match",
          "expected": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "actual": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "match": true
        },
        {
          "id": "inv-d-neg",
          "comparison": "exact_error_match",
          "expected": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "actual": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "match": true
        },
        {
          "id": "inv-er-zero",
          "comparison": "exact_error_match",
          "expected": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "actual": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "match": true
        },
        {
          "id": "inv-er-neg",
          "comparison": "exact_error_match",
          "expected": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "actual": {
            "code": "VALUE_MUST_BE_POSITIVE"
          },
          "match": true
        },
        {
          "id": "inv-missing-D",
          "comparison": "exact_error_match",
          "expected": {
            "code": "MISSING_REQUIRED_INPUT"
          },
          "actual": {
            "code": "MISSING_REQUIRED_INPUT"
          },
          "match": true
        },
        {
          "id": "inv-missing-d",
          "comparison": "exact_error_match",
          "expected": {
            "code": "MISSING_REQUIRED_INPUT"
          },
          "actual": {
            "code": "MISSING_REQUIRED_INPUT"
          },
          "match": true
        }
      ]
    },
    "property": {
      "passed": 5,
      "total": 5,
      "failed": 0,
      "case_ids": [
        "prop-scale",
        "prop-er-quad",
        "prop-mono-D",
        "prop-mono-d",
        "prop-vf"
      ],
      "kind": "fixed",
      "claim_scope": "Enumerated identities: scale invariance Z0(kD,kd)=Z0(D,d); εr×4 → Z0/2; D monotone up; d monotone down; VF·√εr=1. Not generated/random property tests.",
      "definition_ids": [
        "scale-invariance",
        "er-inverse-sqrt",
        "D-monotone-up",
        "d-monotone-down",
        "vf-identity"
      ]
    },
    "round_trip": {
      "passed": 0,
      "total": 0,
      "failed": 0,
      "case_ids": []
    },
    "metamorphic": {
      "passed": 2,
      "total": 2,
      "failed": 0,
      "case_ids": [
        "meta-scale",
        "meta-er-quad"
      ],
      "definition_ids": [
        "scale-invariance",
        "er-inverse-sqrt"
      ]
    },
    "contract": {
      "passed": 4,
      "total": 4,
      "failed": 0
    },
    "cross_interface": {
      "passed": 3,
      "total": 3,
      "failed": 0,
      "case_ids": [
        "iface-z0",
        "iface-er-default",
        "iface-D-lt-d"
      ]
    }
  },
  "coverage": {
    "partitions": [
      {
        "id": "z0",
        "description": "Geometry → Z0",
        "exercised": true,
        "case_count": 10
      },
      {
        "id": "invalid-domain",
        "description": "Invalid inputs",
        "exercised": true,
        "case_count": 18
      }
    ]
  },
  "numerical": {
    "representation": "IEEE-754 binary64",
    "tolerance": {
      "type": "ulp",
      "value": 2,
      "rationale": "Coax Z0 formula; ≤2 ULP vs separate-module O2 (same V8). Declared a priori.",
      "declared_before_evaluation": true
    },
    "max_error_observed": 1,
    "records": [
      {
        "id": "g-z0",
        "reference": {
          "mode": "z0",
          "D_m": 0.0066,
          "d_m": 0.0016,
          "er": 2.25,
          "VF": 0.6666666666666666,
          "Z0_ohm": 56.64342736256609,
          "ratio_D_d": 4.125
        },
        "actual": {
          "mode": "z0",
          "D_m": 0.0066,
          "d_m": 0.0016,
          "er": 2.25,
          "VF": 0.6666666666666666,
          "Z0_ohm": 56.64342736256609,
          "ratio_D_d": 4.125
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "golden"
      },
      {
        "id": "bnd-air",
        "reference": {
          "mode": "z0",
          "D_m": 0.0066,
          "d_m": 0.0016,
          "er": 1,
          "VF": 1,
          "Z0_ohm": 84.96514104384914,
          "ratio_D_d": 4.125
        },
        "actual": {
          "mode": "z0",
          "D_m": 0.0066,
          "d_m": 0.0016,
          "er": 1,
          "VF": 1,
          "Z0_ohm": 84.96514104384914,
          "ratio_D_d": 4.125
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "boundary"
      },
      {
        "id": "meta-scale",
        "reference": 0.9999999999999999,
        "actual": 0.9999999999999999,
        "error_ulp": 1,
        "threshold_ulp": 2,
        "suite": "metamorphic",
        "hops": {
          "base": {
            "reference": {
              "mode": "z0",
              "D_m": 0.0066,
              "d_m": 0.0016,
              "er": 2.25,
              "VF": 0.6666666666666666,
              "Z0_ohm": 56.64342736256609,
              "ratio_D_d": 4.125
            },
            "actual": {
              "mode": "z0",
              "D_m": 0.0066,
              "d_m": 0.0016,
              "er": 2.25,
              "VF": 0.6666666666666666,
              "Z0_ohm": 56.64342736256609,
              "ratio_D_d": 4.125
            },
            "error_ulp": 0
          },
          "follow": {
            "reference": {
              "mode": "z0",
              "D_m": 6.6,
              "d_m": 1.6,
              "er": 2.25,
              "VF": 0.6666666666666666,
              "Z0_ohm": 56.64342736256608,
              "ratio_D_d": 4.124999999999999
            },
            "actual": {
              "mode": "z0",
              "D_m": 6.6,
              "d_m": 1.6,
              "er": 2.25,
              "VF": 0.6666666666666666,
              "Z0_ohm": 56.64342736256608,
              "ratio_D_d": 4.124999999999999
            },
            "error_ulp": 0
          },
          "relation": {
            "reference": 0.9999999999999999,
            "actual": 0.9999999999999999,
            "error_ulp": 0
          }
        }
      },
      {
        "id": "meta-er-quad",
        "reference": 0.5,
        "actual": 0.5,
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "metamorphic",
        "hops": {
          "base": {
            "reference": {
              "mode": "z0",
              "D_m": 0.0066,
              "d_m": 0.0016,
              "er": 2.25,
              "VF": 0.6666666666666666,
              "Z0_ohm": 56.64342736256609,
              "ratio_D_d": 4.125
            },
            "actual": {
              "mode": "z0",
              "D_m": 0.0066,
              "d_m": 0.0016,
              "er": 2.25,
              "VF": 0.6666666666666666,
              "Z0_ohm": 56.64342736256609,
              "ratio_D_d": 4.125
            },
            "error_ulp": 0
          },
          "follow": {
            "reference": {
              "mode": "z0",
              "D_m": 0.0066,
              "d_m": 0.0016,
              "er": 9,
              "VF": 0.3333333333333333,
              "Z0_ohm": 28.321713681283043,
              "ratio_D_d": 4.125
            },
            "actual": {
              "mode": "z0",
              "D_m": 0.0066,
              "d_m": 0.0016,
              "er": 9,
              "VF": 0.3333333333333333,
              "Z0_ohm": 28.321713681283043,
              "ratio_D_d": 4.125
            },
            "error_ulp": 0
          },
          "relation": {
            "reference": 0.5,
            "actual": 0.5,
            "error_ulp": 0
          }
        }
      }
    ]
  },
  "interfaces": {
    "compared": [
      "ui-ssr",
      "rest",
      "mcp"
    ],
    "result": "PASS",
    "notes": "UI (SSR) · REST · MCP equivalent (MCP uses calc API handler). ui-ssr is query-result HTML, not a live browser session. Error-path engine·REST·MCP 1/1 (status, code, calculation_version). SSR compared on URL-canonical requested calculations; empty query is idle (not an error) and JSON-typed object/array inputs are REST/MCP-only."
  },
  "artifacts": {
    "evidence_bundle_sha256": "21a8fd5a1b9cfe3f1f8a459eb18de2e638455c71dd9ec3cc458be4e668e24272",
    "evidence_digest": "eb5f53204f54a2988178befc19f1f19dea037ec29596b3f81c64d2c4fe760f20",
    "production_sha256": "581d358397e61f3217fc34b45dc961d7afe2bb324ddc627607ceb8c3f18ca6f0",
    "attested_catalog_sha256": "808f477fdd8f2fe5079823d03b8498245e5eb9d99a2fc2f49189c818b4168633",
    "production_checks": [
      {
        "id": "electrical.rf.coax:output-const",
        "status": "pass",
        "detail": "output const 1.0.1 vs capability 1.0.1",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-12T10:37:16.262Z"
      },
      {
        "id": "electrical.rf.coax:evidence-sha256",
        "status": "pass",
        "detail": "f4e0a6847295",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-12T10:37:16.262Z"
      },
      {
        "id": "electrical.rf.coax:semantic-contract",
        "status": "pass",
        "detail": "15/15",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-12T10:37:16.262Z"
      },
      {
        "id": "electrical.rf.coax:capability-html-public-origin-agree",
        "status": "pass",
        "detail": "public 1.0.1 vs origin 1.0.1",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-12T10:37:16.262Z"
      },
      {
        "id": "electrical.rf.coax:cvp-manifest-public-origin-agree",
        "status": "pass",
        "detail": "electrical.rf.coax/1.0.1/-/engineering/eb5f53204f54",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-12T10:37:16.262Z",
        "projection_compared": false
      },
      {
        "id": "electrical.rf.coax:cvp-latest-alias-agrees",
        "status": "pass",
        "detail": "electrical.rf.coax/1.0.1/-/engineering/eb5f53204f54",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-12T10:37:16.262Z",
        "projection_compared": false
      },
      {
        "id": "electrical.rf.coax:calculator-html-cvp-projection",
        "status": "pass",
        "detail": "matches Trust display",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-12T10:37:16.262Z"
      },
      {
        "id": "electrical.rf.coax:evidence-html-cvp-projection",
        "status": "pass",
        "detail": "matches Trust display",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-12T10:37:16.262Z"
      }
    ],
    "digest_registry": {
      "digest_algorithm": "sha256",
      "canonicalization": "json-sorted-keys-utf8",
      "entries": [
        {
          "name": "cvp_core_sha256",
          "field": "artifacts.cvp_core_sha256",
          "digest_scope": "cvp_verification_fingerprint_v2",
          "value": "eb5f53204f54a2988178befc19f1f19dea037ec29596b3f81c64d2c4fe760f20",
          "note": "Immutable verification core; excludes attestation/live-status and Evidence contract counts"
        },
        {
          "name": "cvp_evidence_digest",
          "field": "artifacts.evidence_digest",
          "digest_scope": "cvp_verification_fingerprint_v2",
          "value": "eb5f53204f54a2988178befc19f1f19dea037ec29596b3f81c64d2c4fe760f20",
          "note": "Alias of cvp_core_sha256 (historical field name)"
        },
        {
          "name": "artifact_evidence_sha256",
          "field": "release_integrity.digests.evidence_core_sha256",
          "digest_scope": "evidence_artifact_core",
          "value": "f4e0a6847295a60640df7c476a01d76a772e799e6d1db80bbbd1c56abbb93d69",
          "note": "Published Evidence JSON core — Trust freshness / production bind subject"
        },
        {
          "name": "evidence_catalog_digest",
          "field": "artifacts.attested_catalog_sha256",
          "digest_scope": "capability_catalog",
          "value": "808f477fdd8f2fe5079823d03b8498245e5eb9d99a2fc2f49189c818b4168633",
          "note": "Capability catalog integrity; site-wide, not per-suite fingerprint"
        }
      ]
    },
    "cvp_core_sha256": "eb5f53204f54a2988178befc19f1f19dea037ec29596b3f81c64d2c4fe760f20"
  },
  "dependencies": [
    {
      "name": "coax-impedance-engine",
      "version": "1.0.1"
    },
    {
      "name": "coax-impedance-reference-oracle",
      "version": "1.0.0"
    },
    {
      "name": "node",
      "version": "22.23.2"
    }
  ],
  "attestation": {
    "status": "CURRENT",
    "href": "/.well-known/calculatorx-production-attestation.json",
    "id": "b30b8bdca55960eca0d1ed87faacf57e032642a354d4a8191673fb664ac0a8d1",
    "attested_at": "2026-09-12T10:37:16.262Z",
    "last_confirmed_current_at": "2026-09-12T12:38:39.657Z",
    "site_attestation_current": false,
    "capability_attestation_current": true,
    "bound_snapshot_status": "pass",
    "live_report_status": "stale",
    "bound_attested_at": "2026-09-12T12:38:39.657Z",
    "live_updated_at": "2026-09-12T12:38:41.385Z",
    "bound_snapshot": {
      "status": "pass",
      "attested_at": "2026-09-12T12:38:39.657Z",
      "site_stale_count": 1
    },
    "live_site_status": {
      "href": "/.well-known/calculatorx-production-attestation.json"
    },
    "bound_snapshot_site_stale_count": 1,
    "site_stale_capability_count": 1,
    "evidence_attested_at": "2026-09-12T10:37:16.262Z"
  },
  "domain_review": {
    "status": "ABSENT",
    "spec_version": "1.0.1",
    "external_third_party": false
  },
  "internal_review": {
    "status": "PASS",
    "reviewer_role": "rf-engineering",
    "reviewed_by": "CalculatorX physics/RF review",
    "spec_version": "1.0.1",
    "independence": "internal",
    "external_third_party": false
  },
  "timestamps": {
    "verified_at": "2026-09-12T10:37:16.262Z",
    "generated_at": "2026-09-12T10:37:16.262Z",
    "rendered_at": "2026-09-12T12:38:42.614Z",
    "notes": "verified_at/generated_at mark the first publication of this cvp_core_sha256 (artifacts.evidence_digest alias) for suite verification. evidence_attested_at/attested_at is the first production bind of that core digest. last_confirmed_current_at is the latest site-wide report that still confirms CURRENT. rendered_at is this JSON serialization and is not part of cvp_core_sha256 / evidence_digest. Production attestation binds cvp_core_sha256 (binds evidence_digest). Causal order: verified_at ≤ evidence_attested_at ≤ last_confirmed_current_at. attestation.bound_snapshot.site_stale_count is the site-wide stale capability count at Manifest bind time — not a live value. Fetch attestation.live_site_status.href for the current site report."
  },
  "links": {
    "legacy_evidence": "https://www.calculatorx.com/evidence/electrical.rf.coax/1.0.1.json",
    "evidence_page": "https://www.calculatorx.com/evidence/electrical.rf.coax/1.0.1",
    "calculator": "https://www.calculatorx.com/calc/electric/coax-impedance",
    "schema": "https://www.calculatorx.com/developers/cvp/schema/cvp-evidence-1.0.json",
    "protocol": "https://www.calculatorx.com/developers/cvp/spec/1.0",
    "manifest": "https://www.calculatorx.com/evidence/electrical.rf.coax/1.0.1.cvp.json"
  }
}