{ "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": "tolerance-stackup", "version": "1.4.0", "title": "Tolerance Stackup Calculator", "formula_family": "tolerance-rss-wca", "capability_id": "engineering.tolerance.stackup", "verification_revision": "2026-09-16.o3-linear" }, "profile": "engineering", "verified_scope": "Basic RSS/WCA + Engineering dimensions[] + O3 mpmath tabulated RSS/WCA", "deferred_scope": "Geometric GD&T, 3-D assembly loops, and Monte Carlo remain out of this calculator (see Monte Carlo Tolerance). O3 does not cover GD&T.", "unit_contract": { "model": "homogeneous implied unit", "conversion": "none", "mixed_unit_input": "unsupported" }, "status": "STALE", "verification_status": "VERIFIED", "production_freshness": "STALE", "overall_trust": "VERIFIED_STALE", "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": "tolerance-stackup", "version": "1.4.0", "uri": "https://www.calculatorx.com/evidence/engineering.tolerance.stackup/1.4.0.json", "verification_revision": "2026-09-16.o3-linear" }, "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": "ASME Y14.5 — Dimensioning and Tolerancing", "kind": "standard", "reference": "GD&T symbols, rules, and drawing requirements", "url": "https://www.asme.org/codes-standards/find-codes-standards/y14-5-dimensioning-tolerancing" }, { "label": "Mekid, S. — Metrology and Instrumentation (Wiley-ASME Press)", "kind": "other", "reference": "§6.5.4 Worst-Case Tolerance Stack-Up in Asymmetric Dimensional Tolerance; §6.6.2 Worst-Case vs RSS", "url": "https://www.wiley.com/en-us/Metrology+and+Instrumentation%3A+Practical+Applications+for+Engineering+and+Manufacturing-p-9781119721734" }, { "label": "SAE 2007-01-0407 — Tolerance Analysis of Mechanical Assemblies with Asymmetric Tolerances", "kind": "other", "reference": "Modified worst-case and RSS accumulation for asymmetric tolerances", "url": "https://doi.org/10.4271/2007-01-0407" }, { "label": "NIST Technical Note 1297", "kind": "other", "reference": "5. Combined standard uncertainty", "url": "https://www.nist.gov/pml/nist-technical-note-1297/nist-tn-1297-5-combined-standard-uncertainty" }, { "label": "NIST — Evaluating uncertainty components: Type B", "kind": "other", "reference": "Uniform (rectangular) distribution", "url": "https://physics.nist.gov/cuu/Uncertainty/typeb.html" } ] }, "reference": { "items": [ { "class": "O1", "reference_scope": "model", "scope": "model", "label": "RSS and worst-case 1-D tolerance stack (Basic + Engineering)" }, { "class": "O3", "reference_scope": "expected_values", "scope": "expected_values", "label": "Precomputed mpmath high-precision RSS/WCA stack (80 dps) rounded to nearest binary64 — not V8 hypot", "engine": { "name": "tolerance-stackup-mpmath-o3", "precision_bits": 265, "independent_of_iut": true, "same_runtime_as_iut": false, "library": "mpmath 1.4.1", "mpmath_dps": 80, "generator_version": "1.0.0", "generator_sha256": "8c24d35958d7699cd309e037f8607c6b6eca8186be81d0acf9d74beedd683ff1", "table_sha256": "c4a42ddcea761a928f5000550fe934a9fdc7e76b98583d5fa12f5551ad08c917", "seed": "20260916.stackup-o3", "source": "https://www.calculatorx.com/developers/cvp/reproduce/tolerance-stackup-o3-tables.json", "public_table": "/developers/cvp/reproduce/tolerance-stackup-o3-tables.json", "public_generator": "/developers/cvp/reproduce/generate-tolerance-stackup-o3.py" } }, { "class": "O3", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Same O3 table vs IUT stack / W± / nom; ≤2 ULP on tabulated vectors only, independent of Node/V8", "engine": { "name": "tolerance-stackup-mpmath-o3", "precision_bits": 265, "independent_of_iut": true, "same_runtime_as_iut": false, "library": "mpmath 1.4.1", "mpmath_dps": 80, "generator_version": "1.0.0", "generator_sha256": "8c24d35958d7699cd309e037f8607c6b6eca8186be81d0acf9d74beedd683ff1", "table_sha256": "c4a42ddcea761a928f5000550fe934a9fdc7e76b98583d5fa12f5551ad08c917", "seed": "20260916.stackup-o3", "source": "https://www.calculatorx.com/developers/cvp/reproduce/tolerance-stackup-o3-tables.json", "public_table": "/developers/cvp/reproduce/tolerance-stackup-o3-tables.json", "public_generator": "/developers/cvp/reproduce/generate-tolerance-stackup-o3.py" } }, { "class": "O2", "reference_scope": "expected_values", "scope": "expected_values", "label": "Separate-module tolerance-stackup oracle (Basic + Engineering) — same V8 binary64 as IUT", "engine": { "name": "tolerance-stackup-reference", "precision_bits": 53, "independent_of_iut": true } }, { "class": "O2", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Same O2 module backs ≤2 ULP comparison vs IUT on stack / W± / nom / Stat center", "engine": { "name": "tolerance-stackup-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": "Basic RSS/WCA on |tol| magnitudes; Engineering dimensions[] with direction-aware W+/W− and statistical_basis → u" }, "CVP-SCOPE-01": { "result": "PASS", "applicability": "required", "notes": "O2 covers Basic tol[] / tol1…n and Engineering dimensions[] (symmetric, asymmetric, 1σ, 3σ, uniform). Geometric GD&T, 3-D loops, and Monte Carlo are not this calculator." }, "CVP-UNIT-01": { "result": "PASS", "applicability": "required", "notes": "Homogeneous implied unit. All contributors must use the same unit. CalculatorX performs no implicit unit conversion; mixed-unit input is unsupported." }, "CVP-REF-01": { "result": "PASS", "applicability": "required", "notes": "O1 model + O3 expected_values + O3 numerical_behavior + O2 expected_values + O2 numerical_behavior" }, "CVP-GOLD-01": { "result": "PASS", "applicability": "required", "notes": "4/4 legacy golden; 10/10 oracle-backed numeric" }, "CVP-BND-01": { "result": "PASS", "applicability": "required", "notes": "11/11 CVP boundary · 13/13 legacy Evidence boundary" }, "CVP-INV-01": { "result": "PASS", "applicability": "required", "notes": "4 Evidence illegal-input + 1/1 oracle-backed error-code (exact_error_match, not ULP)" }, "CVP-NUM-01": { "result": "PASS", "applicability": "required", "notes": "max_error_observed_ulp=1; policy declared a priori" }, "CVP-COV-01": { "result": "PASS", "applicability": "required", "notes": "8/8 declared partitions (basic-rss, basic-wca, engineering-symmetric, engineering-asymmetric, engineering-1sigma, engineering-3sigma, engineering-uniform, invalid-domain) · 4 legacy golden / 11 CVP boundary unique cases · 4 Evidence invalid-input (may overlap boundary)" }, "CVP-CONTRACT-01": { "result": "PASS", "applicability": "required", "notes": "8/8 CVP contract" }, "CVP-DEP-01": { "result": "PASS", "applicability": "required", "notes": "engine tolerance-stackup; 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": "STALE (freshness / digest drift after last PASS snapshot) · site report stale · local checks pass · local production checks PASS; site attestation is not CURRENT — final status must stay STALE, not VERIFIED · attestation_id=1fdd351e49d9a9103d52e8d4d216269454fafffce59ccada2570a57ac43a6b27 · This calculator STALE · This calculator is not affected · Bound attestation PASS @ 2026-09-14T00:43:05.498Z · Live production status STALE (2 capabilities; 155 remain CURRENT) @ 2026-09-16T02:14:53.894Z · Public schema 1.4.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.4.0 · 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=3c45d14ff1258b0eea59837f3942585dd6825ab0585ca7cb85b4608e08c1f590 · verified_at=2026-09-16T02:28:23.325Z · evidence_attested_at=2026-09-16T02:28:23.325Z · last_confirmed_current_at=2026-09-16T02:28:23.325Z · rendered_at=2026-09-16T02:28:23.325Z · binds=cvp_core_sha256 · attestation snapshot core 5758d2f24cfc ≠ live cvp_core_sha256 9ae988cdc138 (2026-09-16.o3-linear)", "check_result": "PASS", "production_state": "STALE", "binding_current": false }, "CVP-DIM-01": { "result": "PASS", "applicability": "applicable", "notes": "1-D stack magnitude; Engineering nom / W± / Stat center are the same implied unit" }, "CVP-PROP-01": { "result": "PASS", "applicability": "applicable", "notes": "18/18 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. 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": "PASS", "applicability": "higher_assurance", "notes": "O3 10/10 tabulated vectors vs IUT · ≤2 ULP vs O3 applies only to the published tabulated Basic RSS/WCA and Engineering dimensions[] vectors (symmetric, asymmetric, 1σ, 3σ, uniform). It is not a whole-domain stack guarantee and does not cover GD&T or 3-D loops." }, "CVP-EXP-01": { "result": "SKIP", "applicability": "optional", "notes": "CalculatorX internal domain review — not CVP-EXP-01" } }, "tests": { "golden": { "passed": 10, "total": 10, "failed": 0, "case_ids": [ "g-rss", "g-wca", "g-rss-fields", "g-eng-symmetric", "g-eng-asymmetric", "g-eng-asymm-rss", "g-eng-1sigma", "g-eng-3sigma", "g-eng-uniform", "g-eng-uniform-center" ] }, "boundary": { "passed": 11, "total": 11, "failed": 0, "case_ids": [ "empty", "boundary-tol8", "boundary-single", "boundary-zero-pad", "boundary-eng-abc", "boundary-eng-asymm", "boundary-eng-uniform", "boundary-eng-3sigma", "boundary-eng-legacy-normal", "boundary-eng-uniform-center", "boundary-eng-empty" ] }, "invalid": { "passed": 5, "total": 5, "failed": 0, "case_ids": [ "empty", "bad-mode", "boundary-invalid-mode", "boundary-eng-empty", "g-eng-bad-basis" ], "comparison": "exact_error_match", "records": [ { "id": "g-eng-bad-basis", "comparison": "exact_error_match", "expected": { "code": "INVALID_MODE" }, "actual": { "code": "INVALID_MODE" }, "match": true } ] }, "property": { "passed": 18, "total": 18, "failed": 0, "case_ids": [ "property-rss", "property-wca", "property-permute", "property-zero", "property-single-eq", "property-scale", "property-rss-le-wca", "property-tol-alias", "property-eng-nom", "property-eng-matches-basic", "property-eng-asymm", "property-eng-asymm-sides", "property-eng-half-ne-worst", "property-eng-range", "property-eng-3sigma", "property-eng-default-basis", "property-eng-uniform-center", "property-eng-mag-no-shift" ], "kind": "fixed" }, "round_trip": { "passed": 0, "total": 0, "failed": 0, "case_ids": [] }, "metamorphic": { "passed": 0, "total": 0, "failed": 0, "case_ids": [] }, "contract": { "passed": 8, "total": 8, "failed": 0 }, "cross_interface": { "passed": 6, "total": 6, "failed": 0, "case_ids": [ "iface-basic-rss", "iface-basic-wca", "iface-eng-symmetric", "iface-eng-asymmetric", "iface-eng-uniform", "iface-invalid" ] }, "o3": { "passed": 10, "total": 10, "failed": 0, "case_ids": [ "o3-rss", "o3-wca", "o3-rss-fields", "o3-eng-symmetric", "o3-eng-asymmetric", "o3-eng-asymm-rss", "o3-eng-1sigma", "o3-eng-3sigma", "o3-eng-uniform", "o3-eng-uniform-center" ], "generator_id": "tolerance-stackup-mpmath-o3", "seed": "20260916.stackup-o3", "table_sha256": "c4a42ddcea761a928f5000550fe934a9fdc7e76b98583d5fa12f5551ad08c917", "max_error_ulp": 1, "reproduce": "python3 generate-tolerance-stackup-o3.py", "table_url": "/developers/cvp/reproduce/tolerance-stackup-o3-tables.json", "generator_url": "/developers/cvp/reproduce/generate-tolerance-stackup-o3.py", "claim_scope": "≤2 ULP vs O3 applies only to the published tabulated Basic RSS/WCA and Engineering dimensions[] vectors (symmetric, asymmetric, 1σ, 3σ, uniform). It is not a whole-domain stack guarantee and does not cover GD&T or 3-D loops.", "reproduce_url": "https://www.calculatorx.com/evidence/engineering.tolerance.stackup/reproduce" } }, "coverage": { "partitions": [ { "id": "basic-rss", "description": "Basic RSS mode", "exercised": true, "case_count": 8 }, { "id": "basic-wca", "description": "Basic worst-case mode", "exercised": true, "case_count": 4 }, { "id": "engineering-symmetric", "description": "Engineering symmetric ±tol, magnitude basis", "exercised": true, "case_count": 4 }, { "id": "engineering-asymmetric", "description": "Engineering asymmetric +Tol/−Tol", "exercised": true, "case_count": 8 }, { "id": "engineering-1sigma", "description": "Engineering statistical_basis=1sigma", "exercised": true, "case_count": 3 }, { "id": "engineering-3sigma", "description": "Engineering statistical_basis=3sigma", "exercised": true, "case_count": 3 }, { "id": "engineering-uniform", "description": "Engineering statistical_basis=uniform (NIST Type B midpoint)", "exercised": true, "case_count": 6 }, { "id": "invalid-domain", "description": "Invalid inputs", "exercised": true, "case_count": 5 } ] }, "numerical": { "representation": "IEEE-754 binary64", "tolerance": { "type": "ulp", "value": 2, "rationale": "1-D RSS/WCA stack (Basic + Engineering dimensions); ≤2 ULP vs separate-module O2 (same V8). Declared a priori.", "declared_before_evaluation": true }, "claim_scope": "≤2 ULP vs O3 applies only to the published tabulated Basic RSS/WCA and Engineering dimensions[] vectors (symmetric, asymmetric, 1σ, 3σ, uniform). It is not a whole-domain stack guarantee and does not cover GD&T or 3-D loops.", "max_error_observed": 1, "records": [ { "id": "g-rss", "reference": { "mode": "rss", "profile": "basic", "n": 3, "tol": [ 0.1, 0.2, 0.1 ], "stack": 0.24494897427831783, "stack_rss": 0.24494897427831783, "stack_worst": 0.4, "stack_worst_plus": 0.4, "stack_worst_minus": 0.4, "stack_range": 0.8, "stack_half_range": 0.4, "stack_nom": null, "stack_stat_center": null, "stack_center_shift": null, "stack_min": null, "stack_max": null, "rss_over_wca": 0.6123724356957946, "dimensions": null }, "actual": { "mode": "rss", "profile": "basic", "n": 3, "tol": [ 0.1, 0.2, 0.1 ], "stack": 0.24494897427831783, "stack_rss": 0.24494897427831783, "stack_worst": 0.4, "stack_worst_plus": 0.4, "stack_worst_minus": 0.4, "stack_range": 0.8, "stack_half_range": 0.4, "stack_nom": null, "stack_stat_center": null, "stack_center_shift": null, "stack_min": null, "stack_max": null, "rss_over_wca": 0.6123724356957946, "dimensions": null }, 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0.4, "stack_nom": null, "stack_stat_center": null, "stack_center_shift": null, "stack_min": null, "stack_max": null, "rss_over_wca": 0.6123724356957946, "dimensions": null }, "error_ulp": 0, "threshold_ulp": 2, "fields": { "stack": { "ok": true, "error_ulp": 0 }, "stack_rss": { "ok": true, "error_ulp": 0 }, "stack_worst": { "ok": true, "error_ulp": 0 }, "stack_worst_plus": { "ok": true, "error_ulp": 0 }, "stack_worst_minus": { "ok": true, "error_ulp": 0 } }, "suite": "golden" }, { "id": "g-rss-fields", "reference": { "mode": "rss", "profile": "basic", "n": 3, "tol": [ 0.1, 0.2, 0.1 ], "stack": 0.24494897427831783, "stack_rss": 0.24494897427831783, "stack_worst": 0.4, "stack_worst_plus": 0.4, "stack_worst_minus": 0.4, "stack_range": 0.8, "stack_half_range": 0.4, "stack_nom": null, "stack_stat_center": null, "stack_center_shift": null, "stack_min": null, "stack_max": null, "rss_over_wca": 0.6123724356957946, "dimensions": null }, "actual": { "mode": "rss", "profile": "basic", "n": 3, "tol": [ 0.1, 0.2, 0.1 ], "stack": 0.24494897427831783, "stack_rss": 0.24494897427831783, "stack_worst": 0.4, "stack_worst_plus": 0.4, "stack_worst_minus": 0.4, "stack_range": 0.8, "stack_half_range": 0.4, "stack_nom": null, "stack_stat_center": null, "stack_center_shift": null, "stack_min": null, "stack_max": null, "rss_over_wca": 0.6123724356957946, "dimensions": null }, "error_ulp": 0, "threshold_ulp": 2, "fields": { "stack": { "ok": true, "error_ulp": 0 }, "stack_rss": { "ok": true, "error_ulp": 0 }, "stack_worst": { "ok": true, "error_ulp": 0 }, "stack_worst_plus": { "ok": true, "error_ulp": 0 }, "stack_worst_minus": { "ok": true, "error_ulp": 0 } }, "suite": "golden" }, { "id": "g-eng-symmetric", "reference": { "mode": "rss", "profile": "engineering", "n": 3, "tol": [ 0.1, 0.2, 0.1 ], "stack": 0.24494897427831783, "stack_rss": 0.24494897427831783, "stack_worst": 0.4, "stack_worst_plus": 0.4, "stack_worst_minus": 0.4, "stack_range": 0.8, "stack_half_range": 0.4, "stack_nom": 8, 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"suite": "o3" } ] }, "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": "401c496d589086bc386d37909b3789db6031e8a7df92c4f41ba5ae8609f1573f", "evidence_digest": "9ae988cdc138cb64fb85617df7842060c25debec031a19d030a145db654fa8bf", "production_sha256": "3c45d14ff1258b0eea59837f3942585dd6825ab0585ca7cb85b4608e08c1f590", "attested_catalog_sha256": "d7330775e814d9fe1f97af28b52db2ecba2f32e2e3e82f08076f10a72d85c01b", "production_checks": [ { "id": "engineering.tolerance.stackup:output-const", "status": "pass", "detail": "output const 1.4.0 vs capability 1.4.0", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core" }, { "id": "engineering.tolerance.stackup:evidence-sha256", "status": "pass", "detail": "86d06167d359", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core" }, { "id": "engineering.tolerance.stackup:semantic-contract", "status": "pass", "detail": "35/35", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core" }, { "id": "engineering.tolerance.stackup:capability-html-public-origin-agree", "status": "pass", "detail": "public 1.4.0 vs origin 1.4.0", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core" }, { "id": "engineering.tolerance.stackup:cvp-manifest-public-origin-agree", "status": "pass", "detail": "engineering.tolerance.stackup/1.4.0/2026-09-16.o3-linear/engineering/9ae988cdc138", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core", "projection_compared": false }, { "id": "engineering.tolerance.stackup:cvp-latest-alias-agrees", "status": "pass", "detail": "engineering.tolerance.stackup/1.4.0/2026-09-16.o3-linear/engineering/9ae988cdc138", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core", "projection_compared": false }, { "id": "engineering.tolerance.stackup:cvp-immutable-manifest-fetch", "status": "pass", "detail": "public=200 origin=200", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core" }, { "id": "engineering.tolerance.stackup:cvp-immutable-manifest-sha256", "status": "pass", "detail": "5758d2f24cfc", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core" }, { "id": "engineering.tolerance.stackup:cvp-latest-alias-matches-immutable", "status": "pass", "detail": "engineering.tolerance.stackup/1.4.0/2026-09-16.o3-linear/engineering/9ae988cdc138", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core", "projection_compared": false }, { "id": "engineering.tolerance.stackup:calculator-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core" }, { "id": "engineering.tolerance.stackup:evidence-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": false, "attestation_binding_current": false, "attested_at": "2026-09-16T02:28:23.325Z", "attestation_revision": "core" } ], "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": "9ae988cdc138cb64fb85617df7842060c25debec031a19d030a145db654fa8bf", "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": "9ae988cdc138cb64fb85617df7842060c25debec031a19d030a145db654fa8bf", "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": "86d06167d359abcfac5b6e644ce6fdfa40fd0396f347d59226029166af899424", "note": "Published Evidence JSON core — Trust freshness / production bind subject" }, { "name": "evidence_catalog_digest", "field": "artifacts.attested_catalog_sha256", "digest_scope": "capability_catalog", "value": "d7330775e814d9fe1f97af28b52db2ecba2f32e2e3e82f08076f10a72d85c01b", "note": "Capability catalog integrity; site-wide, not per-suite fingerprint" } ] }, "cvp_core_sha256": "9ae988cdc138cb64fb85617df7842060c25debec031a19d030a145db654fa8bf" }, "dependencies": [ { "name": "tolerance-stackup-engine", "version": "1.4.0" }, { "name": "tolerance-stackup-reference-oracle", "version": "1.0.0" }, { "name": "tolerance-stackup-mpmath-o3-table", "version": "tolerance-stackup-mpmath-o3" }, { "name": "node", "version": "20.19.2" } ], "attestation": { "status": "STALE", "href": "/.well-known/calculatorx-production-attestation.json", "id": "1fdd351e49d9a9103d52e8d4d216269454fafffce59ccada2570a57ac43a6b27", "attested_at": "2026-09-16T02:28:23.325Z", "last_confirmed_current_at": "2026-09-16T02:28:23.325Z", "site_attestation_current": false, "capability_attestation_current": false, "bound_snapshot_status": "pass", "live_report_status": "stale", "bound_attested_at": "2026-09-14T00:43:05.498Z", "live_updated_at": "2026-09-16T02:14:53.894Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-09-14T00:43:05.498Z", "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": "2026-09-16T02:28:23.325Z", "stale_reason": "attestation snapshot core 5758d2f24cfc ≠ live cvp_core_sha256 9ae988cdc138 (2026-09-16.o3-linear)" }, "domain_review": { "status": "ABSENT", "spec_version": "1.4.0", "external_third_party": false, "note": "Supplemental CalculatorX internal domain review — see internal_review" }, "internal_review": { "status": "PASS", "reviewer_role": "metrology-engineer", "reviewed_by": "CalculatorX engineering review", "spec_version": "1.4.0", "independence": "internal", "external_third_party": false }, "timestamps": { "verified_at": "2026-09-16T02:28:23.325Z", "generated_at": "2026-09-16T02:28:23.325Z", "rendered_at": "2026-09-16T02:28:23.325Z", "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/engineering.tolerance.stackup/1.4.0.json", "evidence_page": "https://www.calculatorx.com/evidence/engineering.tolerance.stackup/1.4.0", "calculator": "https://www.calculatorx.com/calc/engineering/tolerance-stackup", "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/engineering.tolerance.stackup/1.4.0.cvp.json", "manifest_immutable": "https://www.calculatorx.com/evidence/engineering.tolerance.stackup/1.4.0/2026-09-16.o3-linear.cvp.json", "reproduce": "https://www.calculatorx.com/evidence/engineering.tolerance.stackup/reproduce", "o3_table": "https://www.calculatorx.com/developers/cvp/reproduce/tolerance-stackup-o3-tables.json", "o3_generator": "https://www.calculatorx.com/developers/cvp/reproduce/generate-tolerance-stackup-o3.py", "manifest_core": "https://www.calculatorx.com/evidence/engineering.tolerance.stackup/1.4.0/2026-09-16.o3-linear.9ae988cdc138.cvp.json" } }