{ "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": "energy-cost", "version": "1.4.2", "title": "Energy Cost Calculator", "formula_family": "energy-cost", "capability_id": "electrical.energy_cost", "verification_revision": "2026-09-13.ssr-dollar-literal" }, "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": "20.19.2", "numeric_model": "IEEE-754 binary64", "os": "darwin" }, "suite": { "id": "energy-cost", "version": "1.4.2", "uri": "https://www.calculatorx.com/evidence/electrical.energy_cost/1.4.2.json", "verification_revision": "2026-09-13.ssr-dollar-literal" }, "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-IFACE-01" ], "provenance": { "mode": "direct", "sources": [ { "label": "NIST Guide to the SI (SP 811)", "kind": "other", "reference": "Kilowatt-hour as a common commercial unit of electrical energy", "url": "https://www.nist.gov/pml/special-publication-811" }, { "label": "U.S. Energy Information Administration (EIA)", "kind": "other", "reference": "Electricity prices reported per kilowatt-hour", "url": "https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_5_6_a" } ] }, "reference": { "items": [ { "class": "O1", "reference_scope": "model", "scope": "model", "label": "Simple energy cost from watts or kWh" }, { "class": "O2", "reference_scope": "expected_values", "scope": "expected_values", "label": "Separate-module energy-cost oracle — same V8 binary64 as IUT", "engine": { "name": "energy-cost-reference", "precision_bits": 53, "independent_of_iut": true } }, { "class": "O2", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Same O2 module backs ≤2 ULP scalar comparison vs IUT", "engine": { "name": "energy-cost-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": "watts:(W·h·days/1000)·rate; kwh:kWh·rate" }, "CVP-SCOPE-01": { "result": "PASS", "applicability": "required", "notes": "Flat unit rate only; no standing/fee (see electricity bill)" }, "CVP-UNIT-01": { "result": "PASS", "applicability": "required", "notes": "W, h, days, currency/kWh" }, "CVP-REF-01": { "result": "PASS", "applicability": "required", "notes": "O1 model + O2 expected_values + O2 numerical_behavior" }, "CVP-GOLD-01": { "result": "PASS", "applicability": "required", "notes": "10/10 legacy golden; 2/2 oracle-backed numeric" }, "CVP-BND-01": { "result": "PASS", "applicability": "required", "notes": "12/12 CVP boundary · 13/13 legacy Evidence boundary" }, "CVP-INV-01": { "result": "PASS", "applicability": "required", "notes": "12 Evidence illegal-input + 9/9 oracle-backed error-code (exact_error_match, not ULP)" }, "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": "3/3 declared partitions (watts, kwh, invalid-domain) · 10 legacy golden / 12 CVP boundary unique cases · 12 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 energy-cost; 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 @ 2026-09-16T23:18:54.751Z · live site-wide report stale @ 2026-09-16T23:19:01.075Z (9 other capabilities) · local checks pass · attestation_id=bf3fe5ab59e4bbc9e50f340c6c537d3cf046a9b32473980b03131666eea4e751 · This calculator CURRENT · This calculator is not affected · Bound attestation PASS @ 2026-09-16T23:18:54.751Z · Live production status STALE (9 capabilities; 155 remain CURRENT) @ 2026-09-16T23:19:01.075Z · 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=58fe84b53a8948a8ed33bf1d0f10c2dc305d423b0415cb204b41bee40e09d0f5 · verified_at=2026-09-13T00:12:25.264Z · evidence_attested_at=2026-09-13T00:12:25.264Z · last_confirmed_current_at=2026-09-16T23:18:54.751Z · rendered_at=2026-09-16T23:19:01.110Z · binds=cvp_core_sha256", "check_result": "PASS", "production_state": "CURRENT", "binding_current": true }, "CVP-DIM-01": { "result": "PASS", "applicability": "applicable", "notes": "Energy cost" }, "CVP-PROP-01": { "result": "PASS", "applicability": "applicable", "notes": "5/5 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": "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. Public share URLs use UI ids (powerInput/hoursInput/daysInput/kwhInput/rateInput). CVP-IFACE includes those serialized queries, not only canonical engine keys." }, "CVP-ORACLE-01": { "result": "SKIP", "applicability": "higher_assurance", "notes": "O2 present; O3 not required this wave" }, "CVP-EXP-01": { "result": "SKIP", "applicability": "optional", "notes": "CalculatorX internal domain review — not CVP-EXP-01" } }, "tests": { "golden": { "passed": 2, "total": 2, "failed": 0, "case_ids": [ "g-watts", "g-kwh" ] }, "boundary": { "passed": 12, "total": 12, "failed": 0, "case_ids": [ "missing-rate", "neg-rate", "boundary-zero-rate", "boundary-neg-W", "boundary-neg-hours", "boundary-hours-gt-24", "boundary-neg-days", "boundary-neg-kWh", "boundary-missing-W", "boundary-missing-hours", "boundary-missing-days", "boundary-missing-kWh" ] }, "invalid": { "passed": 21, "total": 21, "failed": 0, "case_ids": [ "missing-rate", "bad-mode", "neg-rate", "boundary-neg-W", "boundary-neg-hours", "boundary-hours-gt-24", "boundary-neg-days", "boundary-neg-kWh", "boundary-missing-W", "boundary-missing-hours", "boundary-missing-days", "boundary-missing-kWh", "inv-neg-W", "inv-neg-hours", "inv-hours-gt-24", "inv-neg-days", "inv-neg-kWh", "inv-missing-W", "inv-missing-hours", "inv-missing-days", "inv-missing-kWh" ], "comparison": "exact_error_match", "records": [ { "id": "inv-neg-W", "comparison": "exact_error_match", "expected": { "code": "VALUE_MUST_BE_NON_NEGATIVE" }, "actual": { "code": "VALUE_MUST_BE_NON_NEGATIVE" }, "match": true }, { "id": "inv-neg-hours", "comparison": "exact_error_match", "expected": { "code": "VALUE_MUST_BE_NON_NEGATIVE" }, "actual": { "code": "VALUE_MUST_BE_NON_NEGATIVE" }, "match": true }, { "id": "inv-hours-gt-24", "comparison": "exact_error_match", "expected": { "code": "HOURS_PER_DAY_OUT_OF_RANGE" }, "actual": { "code": "HOURS_PER_DAY_OUT_OF_RANGE" }, "match": true }, { "id": "inv-neg-days", "comparison": "exact_error_match", "expected": { "code": "VALUE_MUST_BE_NON_NEGATIVE" }, "actual": { "code": "VALUE_MUST_BE_NON_NEGATIVE" }, "match": true }, { "id": "inv-neg-kWh", "comparison": "exact_error_match", "expected": { "code": "VALUE_MUST_BE_NON_NEGATIVE" }, "actual": { "code": "VALUE_MUST_BE_NON_NEGATIVE" }, "match": true }, { "id": "inv-missing-W", "comparison": "exact_error_match", "expected": { "code": "MISSING_REQUIRED_INPUT" }, "actual": { "code": "MISSING_REQUIRED_INPUT" }, "match": true }, { "id": "inv-missing-hours", "comparison": "exact_error_match", "expected": { "code": "MISSING_REQUIRED_INPUT" }, "actual": { "code": "MISSING_REQUIRED_INPUT" }, "match": true }, { "id": "inv-missing-days", "comparison": "exact_error_match", "expected": { "code": "MISSING_REQUIRED_INPUT" }, "actual": { "code": "MISSING_REQUIRED_INPUT" }, "match": true }, { "id": "inv-missing-kWh", "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": [ "property-cost", "property-kwh-mode", "property-linear-load", "property-linear-rate", "property-linear-hours" ], "kind": "fixed" }, "round_trip": { "passed": 0, "total": 0, "failed": 0, "case_ids": [] }, "metamorphic": { "passed": 0, "total": 0, "failed": 0, "case_ids": [] }, "contract": { "passed": 4, "total": 4, "failed": 0 }, "cross_interface": { "passed": 3, "total": 3, "failed": 0, "case_ids": [ "iface-watts", "iface-watts-share", "iface-kwh-share" ] } }, "coverage": { "partitions": [ { "id": "watts", "description": "Watts·hours·days mode", "exercised": true, "case_count": 14 }, { "id": "kwh", "description": "Direct kWh mode", "exercised": true, "case_count": 4 }, { "id": "invalid-domain", "description": "Invalid inputs", "exercised": true, "case_count": 21 } ] }, "numerical": { "representation": "IEEE-754 binary64", "tolerance": { "type": "ulp", "value": 2, "rationale": "Energy cost algebra; ≤2 ULP vs separate-module O2 (same V8). Declared a priori.", "declared_before_evaluation": true }, "max_error_observed": 0, "records": [ { "id": "g-watts", "reference": 18, "actual": 18, "error_ulp": 0, "threshold_ulp": 2, "suite": "golden" }, { "id": "g-kwh", "reference": 18, "actual": 18, "error_ulp": 0, "threshold_ulp": 2, "suite": "golden" } ] }, "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. Public share URLs use UI ids (powerInput/hoursInput/daysInput/kwhInput/rateInput). CVP-IFACE includes those serialized queries, not only canonical engine keys." }, "artifacts": { "evidence_bundle_sha256": "fbf1ef569025fd01cd50eebee93141c912452930670486bc239be7bb23dd587b", "evidence_digest": "b2d8bb7116f1eee4d96517a0203b39ff460fb1f61cb017f5fa417d2ae05b9c39", "production_sha256": "58fe84b53a8948a8ed33bf1d0f10c2dc305d423b0415cb204b41bee40e09d0f5", "attested_catalog_sha256": "006a786d7fd29244ed7da1c582af2a6072358ff25a2e07cbc8909b3ae65fb0af", "production_checks": [ { "id": "electrical.energy_cost: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": "2026-09-13T00:12:25.264Z" }, { "id": "electrical.energy_cost:evidence-sha256", "status": "pass", "detail": "3c233b6d9c6b", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z" }, { "id": "electrical.energy_cost:semantic-contract", "status": "pass", "detail": "28/28", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z" }, { "id": "electrical.energy_cost: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": "2026-09-13T00:12:25.264Z" }, { "id": "electrical.energy_cost:cvp-manifest-public-origin-agree", "status": "pass", "detail": "electrical.energy_cost/1.4.2/2026-09-13.ssr-dollar-literal/engineering/b2d8bb7116f1", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z", "projection_compared": false }, { "id": "electrical.energy_cost:cvp-latest-alias-agrees", "status": "pass", "detail": "electrical.energy_cost/1.4.2/2026-09-13.ssr-dollar-literal/engineering/b2d8bb7116f1", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z", "projection_compared": false }, { "id": "electrical.energy_cost:cvp-immutable-manifest-fetch", "status": "pass", "detail": "public=200 origin=200", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z" }, { "id": "electrical.energy_cost:cvp-immutable-manifest-sha256", "status": "pass", "detail": "b2d8bb7116f1", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z" }, { "id": "electrical.energy_cost:cvp-latest-alias-matches-immutable", "status": "pass", "detail": "electrical.energy_cost/1.4.2/2026-09-13.ssr-dollar-literal/engineering/b2d8bb7116f1", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z", "projection_compared": false }, { "id": "electrical.energy_cost:calculator-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z" }, { "id": "electrical.energy_cost:evidence-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-13T00:12:25.264Z" } ], "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": "b2d8bb7116f1eee4d96517a0203b39ff460fb1f61cb017f5fa417d2ae05b9c39", "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": "b2d8bb7116f1eee4d96517a0203b39ff460fb1f61cb017f5fa417d2ae05b9c39", "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": "3c233b6d9c6bb5c27f2530246be721bf3d9f1d5a4c01529fc775fe968cedbaf0", "note": "Published Evidence JSON core — Trust freshness / production bind subject" }, { "name": "evidence_catalog_digest", "field": "artifacts.attested_catalog_sha256", "digest_scope": "capability_catalog", "value": "006a786d7fd29244ed7da1c582af2a6072358ff25a2e07cbc8909b3ae65fb0af", "note": "Capability catalog integrity; site-wide, not per-suite fingerprint" } ] }, "cvp_core_sha256": "b2d8bb7116f1eee4d96517a0203b39ff460fb1f61cb017f5fa417d2ae05b9c39" }, "dependencies": [ { "name": "energy-cost-engine", "version": "1.4.2" }, { "name": "energy-cost-reference-oracle", "version": "1.0.0" }, { "name": "node", "version": "20.19.2" } ], "attestation": { "status": "CURRENT", "href": "/.well-known/calculatorx-production-attestation.json", "id": "bf3fe5ab59e4bbc9e50f340c6c537d3cf046a9b32473980b03131666eea4e751", "attested_at": "2026-09-13T00:12:25.264Z", "last_confirmed_current_at": "2026-09-16T23:18:54.751Z", "site_attestation_current": false, "capability_attestation_current": true, "bound_snapshot_status": "pass", "live_report_status": "stale", "bound_attested_at": "2026-09-16T23:18:54.751Z", "live_updated_at": "2026-09-16T23:19:01.075Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-09-16T23:18:54.751Z", "site_stale_count": 9 }, "live_site_status": { "href": "/.well-known/calculatorx-production-attestation.json" }, "bound_snapshot_site_stale_count": 9, "site_stale_capability_count": 9, "evidence_attested_at": "2026-09-13T00:12:25.264Z" }, "domain_review": { "status": "ABSENT", "spec_version": "1.4.2", "external_third_party": false, "note": "Supplemental CalculatorX internal domain review — see internal_review" }, "internal_review": { "status": "PASS", "reviewer_role": "electrical-engineer", "reviewed_by": "CalculatorX electrical review", "spec_version": "1.4.2", "independence": "internal", "external_third_party": false }, "timestamps": { "verified_at": "2026-09-13T00:12:25.264Z", "generated_at": "2026-09-13T00:12:25.264Z", "rendered_at": "2026-09-16T23:19:01.110Z", "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.energy_cost/1.4.2.json", "evidence_page": "https://www.calculatorx.com/evidence/electrical.energy_cost/1.4.2", "calculator": "https://www.calculatorx.com/calc/electric/energy-cost", "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.energy_cost/1.4.2.cvp.json", "manifest_immutable": "https://www.calculatorx.com/evidence/electrical.energy_cost/1.4.2/2026-09-13.ssr-dollar-literal.cvp.json", "manifest_core": "https://www.calculatorx.com/evidence/electrical.energy_cost/1.4.2/2026-09-13.ssr-dollar-literal.b2d8bb7116f1.cvp.json" } }