{ "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": "celsius-kelvin", "version": "1.0.2", "title": "Celsius ↔ Kelvin Converter", "formula_family": "celsius_kelvin", "capability_id": "units.temperature.celsius_kelvin", "verification_revision": "2026-11-09.uuce-canonical-units-v1" }, "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": "celsius-kelvin", "version": "1.0.2", "uri": "https://www.calculatorx.com/evidence/units.temperature.celsius_kelvin/1.0.2.json", "verification_revision": "2026-11-09.uuce-canonical-units-v1" }, "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": "SI temperature units", "kind": "other", "reference": "Kelvin / Celsius relation" }, { "label": "NIST / SI temperature", "kind": "standard", "reference": "kelvin and Celsius" } ] }, "controls": { "CVP-PROV-01": { "result": "PASS", "applicability": "required", "notes": "Sources present on evidence" }, "CVP-MODEL-01": { "result": "PASS", "applicability": "required", "notes": "T_K = t_C + 273.15" }, "CVP-SCOPE-01": { "result": "PASS", "applicability": "required", "notes": "Absolute zero floor" }, "CVP-UNIT-01": { "result": "PASS", "applicability": "required", "notes": "°C, K" }, "CVP-REF-01": { "result": "PASS", "applicability": "required", "notes": "O1 model + O2 expected_values + O2 numerical_behavior" }, "CVP-GOLD-01": { "result": "PASS", "applicability": "required", "notes": "2/2 legacy golden; 6/6 oracle-backed numeric" }, "CVP-BND-01": { "result": "PASS", "applicability": "required", "notes": "2/2 numeric-edge Evidence + 3/3 near-singularity numeric; illegal enum/system is Invalid only" }, "CVP-INV-01": { "result": "PASS", "applicability": "required", "notes": "2 Evidence illegal-input + 6/6 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": "2/2 declared partitions (celsius-kelvin, invalid-domain) · 2 legacy golden / 5 CVP boundary unique cases · 2 Evidence invalid-input (may overlap boundary)" }, "CVP-CONTRACT-01": { "result": "PASS", "applicability": "required", "notes": "6/6 CVP contract · release-artifacts-aligned=PASS · schema-output-required-declared=PASS · schema-valid-input-executes=PASS · engine-success-output-validates-schema=PASS · schema-rejects-incomplete-input=PASS · rest-success-payload-validates-schema=PASS" }, "CVP-DEP-01": { "result": "PASS", "applicability": "required", "notes": "engine celsius-kelvin; 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 @ 2026-11-09T08:41:45.478Z · live site-wide report stale @ 2026-11-09T08:41:48.760Z (2 other capabilities) · local checks pass · attestation_id=59b6aa2e3c26a2c145573e1c65c083eb080f1f5c1df28d248c2788d9c5e20553 · This calculator CURRENT · This calculator is not affected · Bound attestation PASS @ 2026-11-09T08:41:45.478Z · Live production status STALE (2 capabilities; 375 remain CURRENT) @ 2026-11-09T08:41:48.760Z · Public schema 1.0.2 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.0.2 · 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=9cbb95094c3495eaa49c4e04a60a8929b3d2835263e2fad9ada75ad91df57509 · verified_at=2026-11-09T08:02:49.073Z · evidence_attested_at=2026-11-09T08:02:49.073Z · last_confirmed_current_at=2026-11-09T08:41:45.478Z · rendered_at=2026-11-09T08:41:55.445Z · binds=cvp_core_sha256", "check_result": "PASS", "production_state": "CURRENT", "binding_current": true }, "CVP-DIM-01": { "result": "PASS", "applicability": "applicable", "notes": "Unit conversion" }, "CVP-PROP-01": { "result": "PASS", "applicability": "applicable", "notes": "2/2 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": "1/1 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. Error-path engine·REST·MCP 3/3 (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": "CalculatorX internal domain review — not CVP-EXP-01" } }, "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 3/3 (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": "37b422d6aa2279b4682594a51782bc1b34cd31aa15df7cf78f088827a5a770ac", "evidence_digest": "45226e9604a7916b8dc056bc113d9a6cad95de0baed79c807696846df6e2fcd9", "production_sha256": "9cbb95094c3495eaa49c4e04a60a8929b3d2835263e2fad9ada75ad91df57509", "attested_catalog_sha256": "3a7aceafb2f1f7219d59398717f123ed50c2a54f9564db9f8013e6afc416d7ee", "production_checks": [ { "id": "units.temperature.celsius_kelvin:output-const", "status": "pass", "detail": "output const 1.0.2 vs capability 1.0.2", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z" }, { "id": "units.temperature.celsius_kelvin:evidence-sha256", "status": "pass", "detail": "c5d2af3241d1", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z" }, { "id": "units.temperature.celsius_kelvin:semantic-contract", "status": "pass", "detail": "6/6", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z" }, { "id": "units.temperature.celsius_kelvin:capability-html-public-origin-agree", "status": "pass", "detail": "public 1.0.2 vs origin 1.0.2", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z" }, { "id": "units.temperature.celsius_kelvin:cvp-manifest-public-origin-agree", "status": "pass", "detail": "units.temperature.celsius_kelvin/1.0.2/2026-11-09.uuce-canonical-units-v1/engineering/45226e9604a7", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z", "projection_compared": false }, { "id": "units.temperature.celsius_kelvin:cvp-latest-alias-agrees", "status": "pass", "detail": "units.temperature.celsius_kelvin/1.0.2/2026-11-09.uuce-canonical-units-v1/engineering/45226e9604a7", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z", "projection_compared": false }, { "id": "units.temperature.celsius_kelvin:cvp-immutable-manifest-fetch", "status": "pass", "detail": "public: HTTP 200 · origin: HTTP 200", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z" }, { "id": "units.temperature.celsius_kelvin:cvp-immutable-manifest-sha256", "status": "pass", "detail": "45226e9604a7", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z" }, { "id": "units.temperature.celsius_kelvin:cvp-latest-alias-matches-immutable", "status": "pass", "detail": "units.temperature.celsius_kelvin/1.0.2/2026-11-09.uuce-canonical-units-v1/engineering/45226e9604a7", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z", "projection_compared": false }, { "id": "units.temperature.celsius_kelvin:calculator-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z" }, { "id": "units.temperature.celsius_kelvin:evidence-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-11-09T08:02:49.073Z" } ], "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": "45226e9604a7916b8dc056bc113d9a6cad95de0baed79c807696846df6e2fcd9", "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": "45226e9604a7916b8dc056bc113d9a6cad95de0baed79c807696846df6e2fcd9", "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": "c5d2af3241d1d9545358628aeb65173b0a21709343d96b4ddb338713848e3010", "note": "Published Evidence JSON core — Trust freshness / production bind subject" }, { "name": "evidence_catalog_digest", "field": "artifacts.attested_catalog_sha256", "digest_scope": "capability_catalog", "value": "3a7aceafb2f1f7219d59398717f123ed50c2a54f9564db9f8013e6afc416d7ee", "note": "Capability catalog integrity; site-wide, not per-suite fingerprint" } ] }, "cvp_core_sha256": "45226e9604a7916b8dc056bc113d9a6cad95de0baed79c807696846df6e2fcd9" }, "dependencies": [ { "name": "celsius-kelvin-engine", "version": "1.0.2" }, { "name": "celsius-kelvin-reference-oracle", "version": "1.0.0" }, { "name": "node", "version": "22.20.0" } ], "attestation": { "status": "CURRENT", "href": "/.well-known/calculatorx-production-attestation.json", "id": "59b6aa2e3c26a2c145573e1c65c083eb080f1f5c1df28d248c2788d9c5e20553", "attested_at": "2026-11-09T08:02:49.073Z", "last_confirmed_current_at": "2026-11-09T08:41:45.478Z", "site_attestation_current": false, "capability_attestation_current": true, "bound_snapshot_status": "pass", "live_report_status": "stale", "bound_attested_at": "2026-11-09T08:41:45.478Z", "live_updated_at": "2026-11-09T08:41:48.760Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-11-09T08:41:45.478Z", "site_stale_count": 2 }, "live_site_status": { "href": "/.well-known/calculatorx-production-attestation.json" }, "bound_snapshot_site_stale_count": 2, "site_stale_capability_count": 2, "evidence_attested_at": "2026-11-09T08:02:49.073Z" }, "domain_review": { "status": "ABSENT", "spec_version": "1.0.2", "external_third_party": false, "note": "Supplemental CalculatorX internal domain review — see internal_review" }, "timestamps": { "verified_at": "2026-11-09T08:02:49.073Z", "generated_at": "2026-11-09T08:02:49.073Z", "rendered_at": "2026-11-09T08:41:55.445Z", "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." }, "unit_contract": { "model": "Affine temperature point conversion", "conversion": "Pinned UUCE definitions, one binary64 output projection", "snapshot_version": "0.3.0-preview.3", "snapshot_definition_sha256": "75c66c1e40753435643e728731261a8b7e4c760649cb662c5883249d1f2ecacb", "execution_projection_sha256": "b22cd71baa090908c21a75a86b52d87cab1be0bd2f965156e40c166f2442fbc4", "integrity_manifest_sha256": "ec4360ac1db7cfa18550d955fe4afca333295b74b2348bfd6a40cf8419d0aef0", "modes": { "c-k": { "quantity_kind": "temperature", "role": "point", "from": { "unit_id": "cx:degC", "revision": "1.1.0", "content_digest": "e0ca2392c6e92876bcaa0987687b98ebc77424036b1518cff8e594f548da2151", "dependency_digest": "7dfd4abf7d5de79b4d27cb0a10c093102a1acdee14999b895848ed1f6ea2e040" }, "to": { "unit_id": "cx:K", "revision": "1.1.0", "content_digest": "bf73890762afee7a6f431058f6699ea2b176d63fb43eda5ea0dd619424f2b86f", "dependency_digest": "47abce63d270acc2065a2a0048c26d0afa1b52fce7aa2bc199b80ca0bcd5152d" } }, "k-c": { "quantity_kind": "temperature", "role": "point", "from": { "unit_id": "cx:K", "revision": "1.1.0", "content_digest": "bf73890762afee7a6f431058f6699ea2b176d63fb43eda5ea0dd619424f2b86f", "dependency_digest": "47abce63d270acc2065a2a0048c26d0afa1b52fce7aa2bc199b80ca0bcd5152d" }, "to": { "unit_id": "cx:degC", "revision": "1.1.0", "content_digest": "e0ca2392c6e92876bcaa0987687b98ebc77424036b1518cff8e594f548da2151", "dependency_digest": "7dfd4abf7d5de79b4d27cb0a10c093102a1acdee14999b895848ed1f6ea2e040" } } } }, "tests": { "golden": { "passed": 6, "total": 6, "failed": 0 }, "boundary": { "passed": 5, "total": 5, "failed": 0 }, "invalid": { "passed": 8, "total": 8, "failed": 0, "comparison": "exact_error_match" }, "property": { "passed": 2, "total": 2, "failed": 0, "kind": "fixed" }, "round_trip": { "passed": 1, "total": 1, "failed": 0 }, "metamorphic": { "passed": 2, "total": 2, "failed": 0 }, "contract": { "passed": 6, "total": 6, "failed": 0 }, "cross_interface": { "passed": 7, "total": 7, "failed": 0 } }, "numerical": { "representation": "IEEE-754 binary64", "tolerance": { "type": "ulp", "value": 0, "rationale": "Fixed CPython Fraction references projected once to binary64.", "declared_before_evaluation": true }, "max_error_observed": 0 }, "coverage": { "partitions": [ { "id": "celsius-kelvin", "description": "unit convert", "exercised": true, "case_count": 16 }, { "id": "invalid-domain", "description": "Invalid inputs", "exercised": true, "case_count": 8 } ] }, "reference": { "items": [ { "class": "O1", "reference_scope": "model", "scope": "model", "label": "Celsius ↔ Kelvin" }, { "class": "O2", "reference_scope": "expected_values", "scope": "expected_values", "label": "Independent CPython Fraction reference and one binary64 projection", "engine": { "name": "CPython Fraction", "precision_bits": 53, "independent_of_iut": true } }, { "class": "O2", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Independent CPython Fraction reference and one binary64 projection", "engine": { "name": "CPython Fraction", "precision_bits": 53, "independent_of_iut": true } } ] }, "links": { "legacy_evidence": "https://www.calculatorx.com/evidence/units.temperature.celsius_kelvin/1.0.2.json", "evidence_page": "https://www.calculatorx.com/evidence/units.temperature.celsius_kelvin/1.0.2", "calculator": "https://www.calculatorx.com/calc/physics/celsius-kelvin", "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/units.temperature.celsius_kelvin/1.0.2.cvp.json", "manifest_immutable": "https://www.calculatorx.com/evidence/units.temperature.celsius_kelvin/1.0.2/2026-11-09.uuce-canonical-units-v1.cvp.json", "manifest_core": "https://www.calculatorx.com/evidence/units.temperature.celsius_kelvin/1.0.2/2026-11-09.uuce-canonical-units-v1.45226e9604a7.cvp.json" }, "disclosure": { "policy": "calculatorx-public-evidence-v1", "full_validation": "private", "representation": "summary" } }