{ "protocol": { "name": "CVP", "version": "1.0.0-proposed", "revision": "2026-09-13", "spec_sha256": "f62725968356c92930531cd6085db76e216da06e95be53d636b0d2cf3218b148", "spec": "https://www.calculatorx.com/developers/cvp/spec/1.0" }, "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", "verification_revision": "2026-10-28.meta-metrics-v2" }, "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": "22.20.0", "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", "verification_revision": "2026-10-28.meta-metrics-v2" }, "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-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" } ] }, "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": "18/18 CVP boundary · 20/20 legacy Evidence 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 legacy golden / 18 CVP boundary unique cases · 18 Evidence invalid-input (may overlap boundary)" }, "CVP-CONTRACT-01": { "result": "PASS", "applicability": "required", "notes": "38/38 CVP contract · contract-page-version=PASS · contract-capability-version=PASS · contract-input-schema-version=PASS · contract-output-schema-version=PASS · evidence-version-matches-manifest=PASS · schema-output-required-declared=PASS · schema-valid-input-executes=PASS · engine-success-output-validates-schema=PASS · schema-rejects-incomplete-input=PASS · operation-input-oneof=PASS · output-units-include-v-and-a=PASS · operation-a-v-ohm-schema-valid=PASS · operation-v-a-ohm-schema-valid=PASS · operation-a-v-watt-schema-valid=PASS · operation-v-a-watt-schema-valid=PASS · operation-dc-omits-pf=PASS · operation-dc-rejects-power-factor=PASS · operation-requires-mode=PASS · operation-ac-requires-power-factor=PASS · operation-a-v-ohm-unit-V=PASS · operation-a-v-watt-unit-V=PASS · operation-v-a-ohm-unit-A=PASS · operation-v-a-watt-unit-A=PASS · output-mode-unit-binding=PASS · operation-result-matches-detail=PASS · operation-formula-matches-system=PASS · versioned-schema-pin=PASS · versioned-schema-id=PASS · jsonld-valid-json=PASS · jsonld-type-webapplication=PASS · jsonld-name-match=PASS · jsonld-canonical-url=PASS · jsonld-software-version-match=PASS · jsonld-system-semantics=PASS · jsonld-offer-free-match=PASS · jsonld-breadcrumb-match=PASS · jsonld-visible-content-match=PASS · rest-success-payload-validates-schema=PASS" }, "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 · 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 @ 2026-10-29T01:22:37.788Z · live site-wide report stale @ 2026-10-29T01:22:44.716Z (213 other capabilities) · local checks pass · attestation_id=52c69c777f14b3653d6a0d99fffe81ea840d401226015698a80d3880c8382ade · This calculator CURRENT · This calculator is not affected · Bound attestation PASS @ 2026-10-29T01:22:37.788Z · Live production status STALE (213 capabilities; 163 remain CURRENT) @ 2026-10-29T01:22:44.716Z · 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 · cvp-latest-alias-agrees=pass · cvp-immutable-manifest-fetch=pass · cvp-immutable-manifest-sha256=pass · cvp-latest-alias-matches-immutable=pass · calculator-html-cvp-projection=pass · evidence-html-cvp-projection=pass · attested_evidence_sha256=0904162d9842ae579e660eb678ec02f2ca6e852dd03b716905c0a6501acd7dae · verified_at=2026-10-28T10:41:39.329Z · evidence_attested_at=2026-10-28T10:41:39.329Z · last_confirmed_current_at=2026-10-29T01:22:37.788Z · rendered_at=2026-10-29T01:22:46.722Z · binds=cvp_core_sha256", "check_result": "PASS", "production_state": "CURRENT", "binding_current": true }, "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": "PASS", "applicability": "applicable", "notes": "2/2 metamorphic; domain=1; input-contract=1; limited to assessed relations/preconditions" }, "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": "named expert review not performed" } }, "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": "20422422703614ad489f0de71bb2c86b4f42747feb32af24ca102a04242a0897", "evidence_digest": "48f35e3a2921cd21e1132ae07bcee37e77883bb19323926a876495b65599badd", "production_sha256": "0904162d9842ae579e660eb678ec02f2ca6e852dd03b716905c0a6501acd7dae", "attested_catalog_sha256": "163b0d7072a58bed20a0320572211167e1629730bef43c185b5f545ceac7744c", "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": "2026-10-28T10:41:39.329Z" }, { "id": "electrical.amps_to_volts:evidence-sha256", "status": "pass", "detail": "2446074a048e", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z" }, { "id": "electrical.amps_to_volts:semantic-contract", "status": "pass", "detail": "42/42", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z" }, { "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": "2026-10-28T10:41:39.329Z" }, { "id": "electrical.amps_to_volts:cvp-manifest-public-origin-agree", "status": "pass", "detail": "electrical.amps_to_volts/1.4.2/2026-10-28.meta-metrics-v2/engineering/48f35e3a2921", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z", "projection_compared": false }, { "id": "electrical.amps_to_volts:cvp-latest-alias-agrees", "status": "pass", "detail": "electrical.amps_to_volts/1.4.2/2026-10-28.meta-metrics-v2/engineering/48f35e3a2921", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z", "projection_compared": false }, { "id": "electrical.amps_to_volts:cvp-immutable-manifest-fetch", "status": "pass", "detail": "public=200 origin=200", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z" }, { "id": "electrical.amps_to_volts:cvp-immutable-manifest-sha256", "status": "pass", "detail": "48f35e3a2921", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z" }, { "id": "electrical.amps_to_volts:cvp-latest-alias-matches-immutable", "status": "pass", "detail": "electrical.amps_to_volts/1.4.2/2026-10-28.meta-metrics-v2/engineering/48f35e3a2921", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z", "projection_compared": false }, { "id": "electrical.amps_to_volts:calculator-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z" }, { "id": "electrical.amps_to_volts:evidence-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.329Z" } ], "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": "48f35e3a2921cd21e1132ae07bcee37e77883bb19323926a876495b65599badd", "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": "48f35e3a2921cd21e1132ae07bcee37e77883bb19323926a876495b65599badd", "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": "2446074a048ebbf41418eedc3afbd89f65ab65c8e62d32313eab10cbc3c56ebf", "note": "Published Evidence JSON core — Trust freshness / production bind subject" }, { "name": "evidence_catalog_digest", "field": "artifacts.attested_catalog_sha256", "digest_scope": "capability_catalog", "value": "163b0d7072a58bed20a0320572211167e1629730bef43c185b5f545ceac7744c", "note": "Capability catalog integrity; site-wide, not per-suite fingerprint" } ] }, "cvp_core_sha256": "48f35e3a2921cd21e1132ae07bcee37e77883bb19323926a876495b65599badd" }, "dependencies": [ { "name": "amps-volts-engine", "version": "1.4.2" }, { "name": "amps-volts-reference-oracle", "version": "1.0.0" }, { "name": "node", "version": "22.20.0" } ], "attestation": { "status": "CURRENT", "href": "/.well-known/calculatorx-production-attestation.json", "id": "52c69c777f14b3653d6a0d99fffe81ea840d401226015698a80d3880c8382ade", "attested_at": "2026-10-28T10:41:39.329Z", "last_confirmed_current_at": "2026-10-29T01:22:37.788Z", "site_attestation_current": false, "capability_attestation_current": true, "bound_snapshot_status": "pass", "live_report_status": "stale", "bound_attested_at": "2026-10-29T01:22:37.788Z", "live_updated_at": "2026-10-29T01:22:44.716Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-10-29T01:22:37.788Z", "site_stale_count": 213 }, "live_site_status": { "href": "/.well-known/calculatorx-production-attestation.json" }, "bound_snapshot_site_stale_count": 213, "site_stale_capability_count": 213, "evidence_attested_at": "2026-10-28T10:41:39.329Z" }, "domain_review": { "status": "ABSENT", "spec_version": "1.4.2", "external_third_party": false, "note": "Named expert review not performed" }, "timestamps": { "verified_at": "2026-10-28T10:41:39.329Z", "generated_at": "2026-10-28T10:41:39.329Z", "rendered_at": "2026-10-29T01:22:46.722Z", "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." }, "tests": { "golden": { "passed": 7, "total": 7, "failed": 0 }, "boundary": { "passed": 18, "total": 18, "failed": 0 }, "invalid": { "passed": 18, "total": 18, "failed": 0 }, "property": { "passed": 11, "total": 11, "failed": 0, "kind": "fixed" }, "round_trip": { "passed": 2, "total": 2, "failed": 0 }, "metamorphic": { "passed": 2, "total": 2, "failed": 0 }, "contract": { "passed": 38, "total": 38, "failed": 0 }, "cross_interface": { "passed": 2, "total": 2, "failed": 0 } }, "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 }, "coverage": { "partitions": [ { "id": "a-v-ohm", "description": "Ohm’s law A→V", "exercised": true, "case_count": 14 }, { "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 } ] }, "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 } }, { "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 } } ] }, "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", "manifest_immutable": "https://www.calculatorx.com/evidence/electrical.amps_to_volts/1.4.2/2026-10-28.meta-metrics-v2.cvp.json", "manifest_core": "https://www.calculatorx.com/evidence/electrical.amps_to_volts/1.4.2/2026-10-28.meta-metrics-v2.48f35e3a2921.cvp.json" }, "disclosure": { "policy": "calculatorx-public-evidence-v1", "full_validation": "private", "representation": "summary" } }