{
  "protocol": {
    "name": "CVP",
    "version": "1.0.0-proposed"
  },
  "document_status": "proposed",
  "calculator": {
    "id": "amps-to-volts",
    "version": "1.4.2",
    "title": "Amps to Volts Calculator",
    "formula_family": "ohms-law-real-power",
    "capability_id": "electrical.amps_to_volts"
  },
  "profile": "engineering",
  "status": "VERIFIED",
  "runner": {
    "name": "cvp-runner",
    "version": "1.0.0"
  },
  "environment": {
    "runtime": "node",
    "runtime_version": "20.19.2",
    "numeric_model": "IEEE-754 binary64",
    "os": "darwin"
  },
  "suite": {
    "id": "amps-to-volts",
    "version": "1.4.2",
    "uri": "https://www.calculatorx.com/evidence/electrical.amps_to_volts/1.4.2.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-ROUND-01",
    "CVP-IFACE-01"
  ],
  "provenance": {
    "mode": "direct",
    "sources": [
      {
        "label": "Watt’s law / power identity",
        "kind": "other",
        "reference": "Real power P = V × I × PF (1φ); P = √3 × V × I × PF (3φ L-L)"
      },
      {
        "label": "Ohm’s law",
        "kind": "other",
        "reference": "Ohmic conductors V = I × R"
      },
      {
        "label": "IEC 60050 — International Electrotechnical Vocabulary",
        "kind": "standard",
        "reference": "Active power (IEV 131-11-42)",
        "url": "https://www.electropedia.org/iev/iev.nsf/display?openform&ievref=131-11-42"
      },
      {
        "label": "IEC 60050 — International Electrotechnical Vocabulary",
        "kind": "standard",
        "reference": "Power factor (IEV 131-11-46)",
        "url": "https://www.electropedia.org/iev/iev.nsf/display?openform&ievref=131-11-46"
      },
      {
        "label": "IEEE Std 1459-2025",
        "kind": "standard",
        "reference": "Power factor in AC real-power calculations",
        "url": "https://standards.ieee.org/ieee/1459/7578/"
      },
      {
        "label": "BIPM SI Brochure (9th edition, version 4.01)",
        "kind": "other",
        "reference": "SI units for ampere, volt, ohm, and watt",
        "url": "https://www.bipm.org/en/publications/si-brochure"
      }
    ]
  },
  "reference": {
    "items": [
      {
        "class": "O1",
        "reference_scope": "model",
        "scope": "model",
        "label": "IEC 60050 active power / power factor + Ohm’s law / Watt’s law citations"
      },
      {
        "class": "O2",
        "reference_scope": "expected_values",
        "scope": "expected_values",
        "label": "Separate-module Node arithmetic oracle (amps-volts-reference) — same V8 binary64 runtime as IUT",
        "engine": {
          "name": "amps-volts-reference",
          "precision_bits": 53,
          "independent_of_iut": true,
          "same_runtime_as_iut": true,
          "runtime": "node-v8-binary64"
        }
      },
      {
        "class": "O2",
        "reference_scope": "numerical_behavior",
        "scope": "numerical_behavior",
        "label": "Same O2 module backs ≤2 ULP binary64 comparison vs IUT (common-mode Node/V8 risk acknowledged)",
        "engine": {
          "name": "amps-volts-reference",
          "precision_bits": 53,
          "independent_of_iut": true,
          "same_runtime_as_iut": true,
          "runtime": "node-v8-binary64"
        }
      }
    ],
    "notes": "Golden expected values and ULP comparisons use a separate O2 module (not IUT transcription). O2 shares Node/V8 binary64 with the IUT — language-isolated O3 is optional for stronger numerical assurance."
  },
  "controls": {
    "CVP-PROV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "IEC/IEEE/BIPM/NIST citations on page + evidence"
    },
    "CVP-MODEL-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Published formulas V=IR / V=P/(I·PF) with AC √3"
    },
    "CVP-SCOPE-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Engineering applicability: DC / AC 1φ / AC 3φ L-L"
    },
    "CVP-UNIT-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "SI units A, V, Ω, W"
    },
    "CVP-REF-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "O1 model + O2 expected_values + O2 numerical_behavior"
    },
    "CVP-GOLD-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "11/11 legacy golden; 7/7 oracle-backed numeric"
    },
    "CVP-BND-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "20/20 boundary"
    },
    "CVP-INV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "18 invalid-domain cases"
    },
    "CVP-NUM-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "max_error_observed_ulp=0; policy declared a priori"
    },
    "CVP-COV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "8/8 declared partitions (a-v-ohm, v-a-ohm, a-v-watt-dc, a-v-watt-ac_single, a-v-watt-ac_three, v-a-watt, invalid-domain, round-trip) · 11 golden / 20 boundary unique cases · 18 Evidence invalid-input (may overlap boundary)"
    },
    "CVP-CONTRACT-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "36/36 contract checks"
    },
    "CVP-DEP-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "engine amps-volts; Node binary64"
    },
    "CVP-ART-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "release_integrity.status=verified · evidence_digest=CVP verification fingerprint v2 (canonical inputs, expected/actual/status, policy, versions; independent of generated_at) · evidence_bundle_sha256=legacy Evidence JSON bytes · production_sha256=bound production attestation report"
    },
    "CVP-PROD-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "CURRENT · site report pass · local checks pass · attestation_id=00c818a77ba026c2d6aa3f7402680cd2dac2a40a816209600bc3c3fcd0b8921c · CURRENT · Public schema 1.4.2 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.4.2 · report output-const=pass · evidence-sha256=pass · semantic-contract=pass · capability-html-public-origin-agree=pass · cvp-manifest-public-origin-agree=pass · calculator-html-cvp-projection=pass · evidence-html-cvp-projection=pass · attested_evidence_sha256=9424f31d3ca937ec4a453e41479201945df6495214f0a220ebb742e7fd1c3f20"
    },
    "CVP-DIM-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "Dimensional V,A,Ω,W relations"
    },
    "CVP-PROP-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "11/11 property"
    },
    "CVP-META-01": {
      "result": "SKIP",
      "applicability": "not_applicable",
      "notes": "No input→output transformation vectors in pack — control not in obligation set"
    },
    "CVP-ROUND-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "2/2 round-trips"
    },
    "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."
    },
    "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": 7,
      "total": 7,
      "failed": 0,
      "case_ids": [
        "g-ohm-24v",
        "g-ohm-1p2",
        "g-watt-dc",
        "g-watt-1ph",
        "g-watt-3ph",
        "g-rev-ohm",
        "g-rev-dc"
      ]
    },
    "boundary": {
      "passed": 20,
      "total": 20,
      "failed": 0,
      "case_ids": [
        "zero-I-hard",
        "pf-zero-hard",
        "zero-R-quotient-hard",
        "boundary-ohm-product-zero-r",
        "boundary-ohm-quotient-0-over-0",
        "boundary-watt-0-over-0",
        "boundary-pf-gt-1",
        "boundary-dc-ignores-pf",
        "boundary-ac-missing-pf",
        "boundary-neg-current",
        "boundary-neg-resistance",
        "boundary-neg-power",
        "boundary-invalid-mode",
        "boundary-invalid-system",
        "boundary-invalid-phase",
        "boundary-missing-current",
        "boundary-missing-resistance",
        "boundary-invalid-number",
        "boundary-watt-zero-v",
        "boundary-overflow"
      ]
    },
    "invalid": {
      "passed": 18,
      "total": 18,
      "failed": 0,
      "case_ids": [
        "zero-I-hard",
        "pf-zero-hard",
        "zero-R-quotient-hard",
        "boundary-ohm-quotient-0-over-0",
        "boundary-watt-0-over-0",
        "boundary-pf-gt-1",
        "boundary-ac-missing-pf",
        "boundary-neg-current",
        "boundary-neg-resistance",
        "boundary-neg-power",
        "boundary-invalid-mode",
        "boundary-invalid-system",
        "boundary-invalid-phase",
        "boundary-missing-current",
        "boundary-missing-resistance",
        "boundary-invalid-number",
        "boundary-watt-zero-v",
        "boundary-overflow"
      ]
    },
    "property": {
      "passed": 11,
      "total": 11,
      "failed": 0,
      "case_ids": [
        "property-ohm",
        "property-watt-dc",
        "property-watt-1phi",
        "property-watt-3phi",
        "property-ohm-roundtrip",
        "property-rest-alias",
        "property-watt-roundtrip-dc",
        "property-watt-roundtrip-1phi",
        "property-watt-roundtrip-3phi",
        "property-sci-notation",
        "property-large-finite"
      ],
      "kind": "fixed"
    },
    "round_trip": {
      "passed": 2,
      "total": 2,
      "failed": 0,
      "case_ids": [
        "rt-ohm",
        "rt-watt-dc"
      ]
    },
    "metamorphic": {
      "passed": 0,
      "total": 0,
      "failed": 0,
      "case_ids": []
    },
    "contract": {
      "passed": 36,
      "total": 36,
      "failed": 0
    },
    "cross_interface": {
      "passed": 2,
      "total": 2,
      "failed": 0,
      "case_ids": [
        "iface-ohm",
        "iface-watt-dc"
      ]
    }
  },
  "coverage": {
    "partitions": [
      {
        "id": "a-v-ohm",
        "description": "Ohm’s law A→V",
        "exercised": true,
        "case_count": 12
      },
      {
        "id": "v-a-ohm",
        "description": "Ohm’s law V→A",
        "exercised": true,
        "case_count": 4
      },
      {
        "id": "a-v-watt-dc",
        "description": "Watts A→V DC",
        "exercised": true,
        "case_count": 11
      },
      {
        "id": "a-v-watt-ac_single",
        "description": "Watts A→V AC 1φ",
        "exercised": true,
        "case_count": 5
      },
      {
        "id": "a-v-watt-ac_three",
        "description": "Watts A→V AC 3φ L-L",
        "exercised": true,
        "case_count": 2
      },
      {
        "id": "v-a-watt",
        "description": "Watts V→A (all systems)",
        "exercised": true,
        "case_count": 3
      },
      {
        "id": "invalid-domain",
        "description": "Invalid / boundary errors",
        "exercised": true,
        "case_count": 18
      },
      {
        "id": "round-trip",
        "description": "Round-trip / property inverses",
        "exercised": true,
        "case_count": 4
      }
    ]
  },
  "numerical": {
    "representation": "IEEE-754 binary64",
    "tolerance": {
      "type": "ulp",
      "value": 2,
      "rationale": "Elementary binary64 ops for Ohm’s-law / P=VI family; ≤2 ULP vs separate-module O2 oracle (same Node/V8 numeric model; not language-isolated). Declared before IUT evaluation.",
      "declared_before_evaluation": true
    },
    "max_error_observed": 0,
    "records": [
      {
        "id": "g-ohm-24v",
        "reference": 24,
        "actual": 24,
        "error_ulp": 0,
        "threshold_ulp": 2
      },
      {
        "id": "g-ohm-1p2",
        "reference": 24,
        "actual": 24,
        "error_ulp": 0,
        "threshold_ulp": 2
      },
      {
        "id": "g-watt-dc",
        "reference": 12,
        "actual": 12,
        "error_ulp": 0,
        "threshold_ulp": 2
      },
      {
        "id": "g-watt-1ph",
        "reference": 120,
        "actual": 120,
        "error_ulp": 0,
        "threshold_ulp": 2
      },
      {
        "id": "g-watt-3ph",
        "reference": 413.87116070940914,
        "actual": 413.87116070940914,
        "error_ulp": 0,
        "threshold_ulp": 2
      },
      {
        "id": "g-rev-ohm",
        "reference": 2,
        "actual": 2,
        "error_ulp": 0,
        "threshold_ulp": 2
      },
      {
        "id": "g-rev-dc",
        "reference": 10,
        "actual": 10,
        "error_ulp": 0,
        "threshold_ulp": 2
      }
    ]
  },
  "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."
  },
  "artifacts": {
    "evidence_bundle_sha256": "9d90f43b55a80a3769fca135581c58513a3c72a251c4bcd3f99804c4a07e32df",
    "evidence_digest": "b787583c1faa2b19da32590bf458eb01c7cfd8bf346716e2c0f4f0badec4415c",
    "production_sha256": "9424f31d3ca937ec4a453e41479201945df6495214f0a220ebb742e7fd1c3f20",
    "attested_catalog_sha256": "e03ef81b30568018b171fd1fc4757c2abe9df7220d9ff35bbaf08038d7630cdb",
    "production_checks": [
      {
        "id": "electrical.amps_to_volts:output-const",
        "status": "pass",
        "detail": "output const 1.4.2 vs capability 1.4.2",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "electrical.amps_to_volts:evidence-sha256",
        "status": "pass",
        "detail": "8404a655e237",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "electrical.amps_to_volts:semantic-contract",
        "status": "pass",
        "detail": "42/42",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "electrical.amps_to_volts:capability-html-public-origin-agree",
        "status": "pass",
        "detail": "public 1.4.2 vs origin 1.4.2",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "electrical.amps_to_volts:cvp-manifest-public-origin-agree",
        "status": "pass",
        "detail": "electrical.amps_to_volts/1.4.2/-/engineering/b787583c1faa",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z",
        "projection_compared": false,
        "observed_live_projection_at_attestation": "VERIFIED"
      },
      {
        "id": "electrical.amps_to_volts:calculator-html-cvp-projection",
        "status": "pass",
        "detail": "matches Manifest",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "electrical.amps_to_volts:evidence-html-cvp-projection",
        "status": "pass",
        "detail": "matches Manifest",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      }
    ]
  },
  "dependencies": [
    {
      "name": "amps-volts-engine",
      "version": "1.4.2"
    },
    {
      "name": "amps-volts-reference-oracle",
      "version": "1.0.0"
    },
    {
      "name": "node",
      "version": "20.19.2"
    }
  ],
  "attestation": {
    "status": "CURRENT",
    "href": "/.well-known/calculatorx-production-attestation.json",
    "id": "00c818a77ba026c2d6aa3f7402680cd2dac2a40a816209600bc3c3fcd0b8921c",
    "attested_at": "2026-09-10T02:52:51.379Z"
  },
  "domain_review": {
    "status": "ABSENT",
    "spec_version": "1.4.2"
  },
  "timestamps": {
    "verified_at": "2026-09-10T03:41:41.946Z",
    "generated_at": "2026-09-10T03:41:41.946Z"
  },
  "links": {
    "legacy_evidence": "https://www.calculatorx.com/evidence/electrical.amps_to_volts/1.4.2.json",
    "evidence_page": "https://www.calculatorx.com/evidence/electrical.amps_to_volts/1.4.2",
    "calculator": "https://www.calculatorx.com/calc/electric/amps-to-volts",
    "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.amps_to_volts/1.4.2.cvp.json"
  }
}