{ "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": "add", "version": "1.0.2", "title": "Sum Calculator", "formula_family": "summation", "capability_id": "math.sum", "verification_revision": "2026-09-16.sources-no-wolfram" }, "profile": "core", "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": "add", "version": "1.0.2", "uri": "https://www.calculatorx.com/evidence/math.sum/1.0.2.json", "verification_revision": "2026-09-16.sources-no-wolfram" }, "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-PROP-01", "CVP-META-01", "CVP-IFACE-01" ], "provenance": { "mode": "direct", "sources": [ { "label": "OpenStax Prealgebra 2e — Add Whole Numbers", "kind": "other", "reference": "1.2 Place-value addition", "url": "https://openstax.org/books/prealgebra-2e/pages/1-2-add-whole-numbers" }, { "label": "OpenStax Prealgebra 2e — Add Integers", "kind": "other", "reference": "3.2 Signed addition", "url": "https://openstax.org/books/prealgebra-2e/pages/3-2-add-integers" }, { "label": "CalculatorX mathematical conventions", "kind": "other", "reference": "Neumaier compensated summation for scientific-notation lists" } ] }, "controls": { "CVP-PROV-01": { "result": "PASS", "applicability": "required", "notes": "Sources present on evidence" }, "CVP-MODEL-01": { "result": "PASS", "applicability": "required", "notes": "exact decimal list sum; Neumaier for scientific-notation lists; long addition for non-negative decimals" }, "CVP-SCOPE-01": { "result": "PASS", "applicability": "required", "notes": "Declared partitions are sum-exact-decimal, sum-scientific, long-integer, long-decimal, invalid-domain — aligned with published algorithms (exact-decimal vs Neumaier) and Long addition integer/decimal work. O2 checks numeric totals; column-work strings are not an independent numerical claim." }, "CVP-UNIT-01": { "result": "PASS", "applicability": "required", "notes": "unit-agnostic (inputs should share a unit; the sum inherits it; units are not parsed)" }, "CVP-REF-01": { "result": "PASS", "applicability": "required", "notes": "O1 model + O2 expected_values / numerical_behavior (exact rationals; Node used only to round scientific sums to binary64)" }, "CVP-GOLD-01": { "result": "PASS", "applicability": "required", "notes": "24/24 legacy golden; 10/10 oracle-backed numeric" }, "CVP-BND-01": { "result": "PASS", "applicability": "required", "notes": "6/6 CVP boundary · 7/7 legacy Evidence boundary" }, "CVP-INV-01": { "result": "PASS", "applicability": "required", "notes": "6 Evidence illegal-input + 3/3 oracle-backed error-code (exact_error_match, not ULP)" }, "CVP-NUM-01": { "result": "PASS", "applicability": "required", "notes": "Plain-decimal and long-addition goldens: exact sumStr identity vs independent BigInt rationals. Scientific-notation goldens: ≤2 ULP on value vs the same exact rational rounded to binary64. Tabulated vectors only — not a whole-domain ≤2 ULP guarantee, including unlisted cancellation or mixed-format lists. Legacy Evidence `tol` is not this policy." }, "CVP-COV-01": { "result": "PASS", "applicability": "required", "notes": "5/5 declared partitions (sum-exact-decimal, sum-scientific, long-integer, long-decimal, invalid-domain) · 24 legacy golden / 6 CVP boundary unique cases · 6 Evidence invalid-input (may overlap boundary)" }, "CVP-CONTRACT-01": { "result": "PASS", "applicability": "required", "notes": "3/3 CVP contract" }, "CVP-DEP-01": { "result": "PASS", "applicability": "required", "notes": "engine sum; 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 @ 2026-09-16T23:19:11.710Z (21 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 (21 capabilities; 142 remain CURRENT) @ 2026-09-16T23:19:11.710Z · 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=58fe84b53a8948a8ed33bf1d0f10c2dc305d423b0415cb204b41bee40e09d0f5 · verified_at=2026-09-16T06:43:07.596Z · evidence_attested_at=2026-09-16T06:43:07.596Z · last_confirmed_current_at=2026-09-16T23:18:54.751Z · rendered_at=2026-09-16T23:19:11.766Z · binds=cvp_core_sha256", "check_result": "PASS", "production_state": "CURRENT", "binding_current": true }, "CVP-DIM-01": { "result": "SKIP", "applicability": "not_applicable", "notes": "Unit-agnostic core calculator — units are not parsed; no physical dimension algebra" }, "CVP-PROP-01": { "result": "PASS", "applicability": "applicable", "notes": "3/3 property" }, "CVP-META-01": { "result": "PASS", "applicability": "applicable", "notes": "1/1 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": "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 1/1 (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 1/1 (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": "34be24657eefe8952f665439461b97aa7f851c3799cc5c4d9934342a87d9e5f9", "evidence_digest": "a295d54714a48c041cbadca14376bf1c079a84dc528c44869816c1b57c329c1f", "production_sha256": "58fe84b53a8948a8ed33bf1d0f10c2dc305d423b0415cb204b41bee40e09d0f5", "attested_catalog_sha256": "006a786d7fd29244ed7da1c582af2a6072358ff25a2e07cbc8909b3ae65fb0af", "production_checks": [ { "id": "math.sum: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": "2026-09-16T06:43:07.596Z" }, { "id": "math.sum:evidence-sha256", "status": "pass", "detail": "42b19eb5b573", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z" }, { "id": "math.sum:semantic-contract", "status": "pass", "detail": "31/31", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z" }, { "id": "math.sum: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": "2026-09-16T06:43:07.596Z" }, { "id": "math.sum:cvp-manifest-public-origin-agree", "status": "pass", "detail": "math.sum/1.0.2/2026-09-16.sources-no-wolfram/core/a295d54714a4", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z", "projection_compared": false }, { "id": "math.sum:cvp-latest-alias-agrees", "status": "pass", "detail": "math.sum/1.0.2/2026-09-16.sources-no-wolfram/core/a295d54714a4", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z", "projection_compared": false }, { "id": "math.sum:cvp-immutable-manifest-fetch", "status": "pass", "detail": "public=200 origin=200", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z" }, { "id": "math.sum:cvp-immutable-manifest-sha256", "status": "pass", "detail": "a295d54714a4", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z" }, { "id": "math.sum:cvp-latest-alias-matches-immutable", "status": "pass", "detail": "math.sum/1.0.2/2026-09-16.sources-no-wolfram/core/a295d54714a4", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z", "projection_compared": false }, { "id": "math.sum:calculator-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z" }, { "id": "math.sum:evidence-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-09-16T06:43:07.596Z" } ], "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": "a295d54714a48c041cbadca14376bf1c079a84dc528c44869816c1b57c329c1f", "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": "a295d54714a48c041cbadca14376bf1c079a84dc528c44869816c1b57c329c1f", "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": "42b19eb5b57350e467933f57ae4fddd60b536ecb948f0f8f79719f1eb08de3cb", "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": "a295d54714a48c041cbadca14376bf1c079a84dc528c44869816c1b57c329c1f" }, "dependencies": [ { "name": "sum-engine", "version": "1.0.2" }, { "name": "sum-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": "2026-09-16T06:43:07.596Z", "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": "2026-09-16T23:19:11.710Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-09-16T23:18:54.751Z", "site_stale_count": 21 }, "live_site_status": { "href": "/.well-known/calculatorx-production-attestation.json" }, "bound_snapshot_site_stale_count": 21, "site_stale_capability_count": 21, "evidence_attested_at": "2026-09-16T06:43:07.596Z" }, "domain_review": { "status": "ABSENT", "spec_version": "1.0.2", "external_third_party": false, "note": "Named expert review not performed" }, "timestamps": { "verified_at": "2026-09-16T06:43:07.596Z", "generated_at": "2026-09-16T06:43:07.596Z", "rendered_at": "2026-09-16T23:19:11.766Z", "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": 10, "total": 10, "failed": 0 }, "boundary": { "passed": 6, "total": 6, "failed": 0 }, "invalid": { "passed": 9, "total": 9, "failed": 0, "comparison": "exact_error_match" }, "property": { "passed": 3, "total": 3, "failed": 0 }, "round_trip": { "passed": 0, "total": 0, "failed": 0 }, "metamorphic": { "passed": 1, "total": 1, "failed": 0 }, "contract": { "passed": 3, "total": 3, "failed": 0 }, "cross_interface": { "passed": 6, "total": 6, "failed": 0 } }, "numerical": { "representation": "exact decimal-string identity (plain/long); IEEE-754 binary64 vs exact-rational sum (scientific-notation lists)", "tolerance": { "type": "ulp", "value": 2, "rationale": "Scientific-notation lists: ≤2 ULP on value vs independent exact-rational sum rounded to binary64. Plain decimal and long addition use exact sumStr identity (ULP not applicable). Declared a priori.", "declared_before_evaluation": true }, "max_error_observed": 1, "claim_scope": "Plain-decimal and long-addition goldens: exact sumStr identity vs independent BigInt rationals. Scientific-notation goldens: ≤2 ULP on value vs the same exact rational rounded to binary64. Tabulated vectors only — not a whole-domain ≤2 ULP guarantee, including unlisted cancellation or mixed-format lists." }, "coverage": { "partitions": [ { "id": "sum-exact-decimal", "description": "Sum mode, plain decimals — exact base-10 addition (no scientific notation)", "exercised": true, "case_count": 25 }, { "id": "sum-scientific", "description": "Sum mode with a scientific-notation token — Neumaier compensated IEEE-754", "exercised": true, "case_count": 8 }, { "id": "long-integer", "description": "Long addition of non-negative integers (no decimal point)", "exercised": true, "case_count": 3 }, { "id": "long-decimal", "description": "Long addition of non-negative decimals (place-value columns)", "exercised": true, "case_count": 3 }, { "id": "invalid-domain", "description": "Missing values, invalid tokens, long-mode negatives / scientific notation, invalid mode", "exercised": true, "case_count": 9 } ] }, "reference": { "items": [ { "class": "O1", "reference_scope": "model", "scope": "model", "label": "Sum of a list of real numbers" }, { "class": "O2", "reference_scope": "expected_values", "scope": "expected_values", "label": "Separate-module sum oracle — independent exact-rational list sum (not IUT transcription; not shared IEEE-754 accumulation)", "engine": { "name": "sum-reference", "numeric_model": "exact_rational_sum", "independent_of_iut": true, "same_runtime_as_iut": true } }, { "class": "O2", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Same O2 module backs exact sumStr identity for plain/long and ≤2 ULP vs exact-rational rounded binary64 for scientific-notation lists", "engine": { "name": "sum-reference", "numeric_model": "exact_rational_sum", "independent_of_iut": true, "same_runtime_as_iut": true } } ] }, "links": { "legacy_evidence": "https://www.calculatorx.com/evidence/math.sum/1.0.2.json", "evidence_page": "https://www.calculatorx.com/evidence/math.sum/1.0.2", "calculator": "https://www.calculatorx.com/calc/math/add", "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.sum/1.0.2.cvp.json", "manifest_immutable": "https://www.calculatorx.com/evidence/math.sum/1.0.2/2026-09-16.sources-no-wolfram.cvp.json", "manifest_core": "https://www.calculatorx.com/evidence/math.sum/1.0.2/2026-09-16.sources-no-wolfram.a295d54714a4.cvp.json" }, "disclosure": { "policy": "calculatorx-public-evidence-v1", "full_validation": "private", "representation": "summary" } }