{ "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": "definite-integral", "version": "1.1.1", "title": "Definite Integral Calculator", "formula_family": "definite_integral", "capability_id": "math.numerical.definite_integral", "verification_revision": "2026-10-07.integral-stability-iface2" }, "profile": "core", "verified_scope": "all published methods", "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": "definite-integral", "version": "1.1.1", "uri": "https://www.calculatorx.com/evidence/math.numerical.definite_integral/1.1.1.json", "verification_revision": "2026-10-07.integral-stability-iface2" }, "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-XCAL-01", "CVP-IFACE-01" ], "provenance": { "mode": "direct", "sources": [ { "label": "ISO 80000-2:2019 Quantities and units — Mathematics", "kind": "standard", "reference": "Definite integral ∫_a^b f(x) dx" }, { "label": "CRC Standard Mathematical Tables — composite trapezoid, Simpson 1/3, Gauss–Legendre", "kind": "other", "reference": "Composite trapezoid and Simpson 1/3; n-point Gauss–Legendre exact for degree ≤ 2n−1" } ] }, "controls": { "CVP-PROV-01": { "result": "PASS", "applicability": "required", "notes": "Sources present on evidence" }, "CVP-MODEL-01": { "result": "PASS", "applicability": "required", "notes": "Independent high-precision quadrature and closed-form baseline fixtures; fixed panel/node methods" }, "CVP-SCOPE-01": { "result": "PASS", "applicability": "required", "notes": "Definite ∫_a^b only. Discovery /simpson-rule, /trapezoidal-rule, /gauss-quadrature lock method. Not indefinite CAS." }, "CVP-UNIT-01": { "result": "PASS", "applicability": "required", "notes": "dimensionless" }, "CVP-REF-01": { "result": "PASS", "applicability": "required", "notes": "O1 model + O2 expected_values + O2 numerical_behavior" }, "CVP-GOLD-01": { "result": "PASS", "applicability": "required", "notes": "5/5 legacy golden; 83/83 oracle-backed numeric" }, "CVP-BND-01": { "result": "PASS", "applicability": "required", "notes": "1/1 numeric-edge Evidence + 1/1 near-singularity numeric; illegal enum/system is Invalid only" }, "CVP-INV-01": { "result": "PASS", "applicability": "required", "notes": "2 Evidence illegal-input + 3/3 oracle-backed error-code (exact_error_match, not ULP)" }, "CVP-NUM-01": { "result": "PASS", "applicability": "required", "notes": "max_error_observed_ulp=20681; policy declared a priori" }, "CVP-COV-01": { "result": "PASS", "applicability": "required", "notes": "4/4 declared partitions (simpson, trapezoid, gauss, invalid-domain) · 5 legacy golden / 2 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 definite-integral; 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 @ 2026-10-13T09:44:14.989Z · live site-wide report stale @ 2026-10-13T09:44:44.229Z (13 other capabilities) · local checks pass · attestation_id=791a7e77ad1162029d35e7954ae29a482e2dfaa49ee44dc28716333e8e1e7ae6 · This calculator CURRENT · This calculator is not affected · Bound attestation PASS @ 2026-10-13T09:44:14.989Z · Live production status STALE (13 capabilities; 363 remain CURRENT) @ 2026-10-13T09:44:44.229Z · Public schema 1.1.1 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.1.1 · 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 · 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=5bf309227321d70df5fa56834ed00961a3b8648c53cc4f030c9937ef1f65f879 · verified_at=2026-10-06T23:48:59.219Z · evidence_attested_at=2026-10-06T23:48:59.219Z · last_confirmed_current_at=2026-10-13T09:44:14.989Z · rendered_at=2026-10-13T09:44:44.452Z · binds=cvp_core_sha256", "check_result": "PASS", "production_state": "CURRENT", "binding_current": true }, "CVP-DIM-01": { "result": "PASS", "applicability": "applicable", "notes": "definite integral of a scalar" }, "CVP-PROP-01": { "result": "PASS", "applicability": "applicable", "notes": "1/1 property · enumerated fixed assertions (not generated; no seed)" }, "CVP-META-01": { "result": "PASS", "applicability": "applicable", "notes": "3/3 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": "PASS", "applicability": "applicable", "notes": "1/1 cross-calculator · xcal-unit-ode-euler PASS vs math.numerical.ode" }, "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 2/2 (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": "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. Error-path engine·REST·MCP 2/2 (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": "0a71cd58bfd976031c22e5c23c446e171ef388da2c929d5607b13f72ccc57318", "evidence_digest": "f22f649f5f61d553b643bd066fb457e203223e9dd75ba0bd50464234f8b7c7ad", "production_sha256": "5bf309227321d70df5fa56834ed00961a3b8648c53cc4f030c9937ef1f65f879", "attested_catalog_sha256": "07c3e82e13401c468959a4de769220c1d2e01621be660164456cb47f7ddb3906", "production_checks": [ { "id": "math.numerical.definite_integral:output-const", "status": "pass", "detail": "output const 1.1.1 vs capability 1.1.1", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z" }, { "id": "math.numerical.definite_integral:evidence-sha256", "status": "pass", "detail": "1d5a044099e5", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z" }, { "id": "math.numerical.definite_integral:semantic-contract", "status": "pass", "detail": "13/13", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z" }, { "id": "math.numerical.definite_integral:capability-html-public-origin-agree", "status": "pass", "detail": "public 1.1.1 vs origin 1.1.1", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z" }, { "id": "math.numerical.definite_integral:cvp-manifest-public-origin-agree", "status": "pass", "detail": "math.numerical.definite_integral/1.1.1/2026-10-07.integral-stability-iface2/core/f22f649f5f61", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z", "projection_compared": false }, { "id": "math.numerical.definite_integral:cvp-latest-alias-agrees", "status": "pass", "detail": "math.numerical.definite_integral/1.1.1/2026-10-07.integral-stability-iface2/core/f22f649f5f61", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z", "projection_compared": false }, { "id": "math.numerical.definite_integral:cvp-immutable-manifest-fetch", "status": "pass", "detail": "public=200 origin=200", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z" }, { "id": "math.numerical.definite_integral:cvp-immutable-manifest-sha256", "status": "pass", "detail": "f22f649f5f61", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z" }, { "id": "math.numerical.definite_integral:cvp-latest-alias-matches-immutable", "status": "pass", "detail": "math.numerical.definite_integral/1.1.1/2026-10-07.integral-stability-iface2/core/f22f649f5f61", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z", "projection_compared": false }, { "id": "math.numerical.definite_integral:calculator-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z" }, { "id": "math.numerical.definite_integral:evidence-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-06T23:48:59.219Z" } ], "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": "f22f649f5f61d553b643bd066fb457e203223e9dd75ba0bd50464234f8b7c7ad", "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": "f22f649f5f61d553b643bd066fb457e203223e9dd75ba0bd50464234f8b7c7ad", "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": "1d5a044099e5d0212b58ba8a07ed33d38e83466c45e866a61af7bc1f19ebea82", "note": "Published Evidence JSON core — Trust freshness / production bind subject" }, { "name": "evidence_catalog_digest", "field": "artifacts.attested_catalog_sha256", "digest_scope": "capability_catalog", "value": "07c3e82e13401c468959a4de769220c1d2e01621be660164456cb47f7ddb3906", "note": "Capability catalog integrity; site-wide, not per-suite fingerprint" } ] }, "cvp_core_sha256": "f22f649f5f61d553b643bd066fb457e203223e9dd75ba0bd50464234f8b7c7ad" }, "dependencies": [ { "name": "definite-integral-engine", "version": "1.1.1" }, { "name": "definite-integral-reference-oracle", "version": "1.0.0" }, { "name": "math.numerical.ode", "version": "1.1.0", "role": "cross_calculator_peer", "capability_id": "math.numerical.ode", "evidence_digest": "1db1ab47c2db40e339230dc9e2617a2e3452b64e8427abe79f6b6e74167bcbf6", "evidence": "https://www.calculatorx.com/evidence/math.numerical.ode/1.1.0.cvp.json" }, { "name": "node", "version": "22.20.0" } ], "attestation": { "status": "CURRENT", "href": "/.well-known/calculatorx-production-attestation.json", "id": "791a7e77ad1162029d35e7954ae29a482e2dfaa49ee44dc28716333e8e1e7ae6", "attested_at": "2026-10-06T23:48:59.219Z", "last_confirmed_current_at": "2026-10-13T09:44:14.989Z", "site_attestation_current": false, "capability_attestation_current": true, "bound_snapshot_status": "pass", "live_report_status": "stale", "bound_attested_at": "2026-10-13T09:44:14.989Z", "live_updated_at": "2026-10-13T09:44:44.229Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-10-13T09:44:14.989Z", "site_stale_count": 13 }, "live_site_status": { "href": "/.well-known/calculatorx-production-attestation.json" }, "bound_snapshot_site_stale_count": 13, "site_stale_capability_count": 13, "evidence_attested_at": "2026-10-06T23:48:59.219Z" }, "domain_review": { "status": "ABSENT", "spec_version": "1.1.1", "external_third_party": false, "note": "Named expert review not performed" }, "timestamps": { "verified_at": "2026-10-06T23:48:59.219Z", "generated_at": "2026-10-06T23:48:59.219Z", "rendered_at": "2026-10-13T09:44:44.452Z", "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": 83, "total": 83, "failed": 0 }, "boundary": { "passed": 2, "total": 2, "failed": 0 }, "invalid": { "passed": 5, "total": 5, "failed": 0, "comparison": "exact_error_match" }, "property": { "passed": 1, "total": 1, "failed": 0, "kind": "fixed" }, "round_trip": { "passed": 0, "total": 0, "failed": 0 }, "metamorphic": { "passed": 3, "total": 3, "failed": 0 }, "contract": { "passed": 6, "total": 6, "failed": 0 }, "cross_interface": { "passed": 7, "total": 7, "failed": 0 }, "cross_calculator": { "passed": 1, "total": 1, "failed": 0 } }, "numerical": { "representation": "IEEE-754 binary64; 12 significant digits, no absolute zero floor", "tolerance": { "type": "relative", "value": 2e-10, "declared_before_evaluation": true, "rationale": "Independent mpmath 90/140 dps references evaluate each requested quadrature separately from its closed-form integral; relative 2e-10 plus 4 smallest subnormals, no generic near-zero floor." }, "max_error_observed": 20681 }, "coverage": { "partitions": [ { "id": "simpson", "description": "simpson", "exercised": true, "case_count": 42 }, { "id": "trapezoid", "description": "trapezoid", "exercised": true, "case_count": 28 }, { "id": "gauss", "description": "gauss", "exercised": true, "case_count": 30 }, { "id": "invalid-domain", "description": "Invalid inputs", "exercised": true, "case_count": 5 } ] }, "reference": { "items": [ { "class": "O1", "reference_scope": "model", "scope": "model", "label": "∫_a^b f; composite trapezoid, Simpson 1/3, n-point Gauss–Legendre" }, { "class": "O2", "reference_scope": "expected_values", "scope": "expected_values", "label": "Independent mpmath 90/140 dps fixtures: requested quadrature and analytic integral evaluated separately; no IUT imports", "engine": { "name": "mpmath-90/140dps-fixtures", "precision_bits": 299, "independent_of_iut": true, "same_runtime_as_iut": false } }, { "class": "O2", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Independent high-precision quadrature vs binary64 publication; relative 2e-10 plus 4 subnormals", "engine": { "name": "mpmath-90/140dps-fixtures", "precision_bits": 299, "independent_of_iut": true, "same_runtime_as_iut": false } } ] }, "links": { "legacy_evidence": "https://www.calculatorx.com/evidence/math.numerical.definite_integral/1.1.1.json", "evidence_page": "https://www.calculatorx.com/evidence/math.numerical.definite_integral/1.1.1", "calculator": "https://www.calculatorx.com/calc/math/definite-integral", "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/math.numerical.definite_integral/1.1.1.cvp.json", "manifest_immutable": "https://www.calculatorx.com/evidence/math.numerical.definite_integral/1.1.1/2026-10-07.integral-stability-iface2.cvp.json", "manifest_core": "https://www.calculatorx.com/evidence/math.numerical.definite_integral/1.1.1/2026-10-07.integral-stability-iface2.f22f649f5f61.cvp.json" }, "disclosure": { "policy": "calculatorx-public-evidence-v1", "full_validation": "private", "representation": "summary" } }