{ "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": "antenna-length", "version": "1.0.3", "title": "Antenna Length Calculator", "formula_family": "wavelength-fraction", "capability_id": "electrical.rf.antenna_length", "verification_revision": "2026-10-28.meta-metrics-v2" }, "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": "antenna-length", "version": "1.0.3", "uri": "https://www.calculatorx.com/evidence/electrical.rf.antenna_length/1.0.3.json", "verification_revision": "2026-10-28.meta-metrics-v2" }, "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-IFACE-01" ], "provenance": { "mode": "direct", "sources": [ { "label": "NIST / CODATA — speed of light in vacuum", "kind": "other", "reference": "c = 299 792 458 m/s (exact)", "url": "https://physics.nist.gov/cuu/Constants/Value/c.html" }, { "label": "ARRL — Single Band Dipoles", "kind": "other", "reference": "Empirical 468/f_MHz resonant-wire length; leave extra and trim to SWR", "url": "https://www.arrl.org/single-band-dipoles" }, { "label": "ARRL — Ground-plane Antennas for 144, 222 and 440 MHz", "kind": "other", "reference": "¼-λ ground-plane antenna; radiator ≈ λ/4 over a ground-plane / radial system", "url": "https://www.arrl.org/files/file/Technology/tis/info/pdf/ab18-16.pdf" } ] }, "controls": { "CVP-PROV-01": { "result": "PASS", "applicability": "required", "notes": "Sources present on evidence" }, "CVP-MODEL-01": { "result": "PASS", "applicability": "required", "notes": "L = (c/f)·k·frac with c = 299792458 m/s; k = length_factor" }, "CVP-SCOPE-01": { "result": "PASS", "applicability": "required", "notes": "Free-space / shortened wire element models; not a full EM solver" }, "CVP-UNIT-01": { "result": "PASS", "applicability": "required", "notes": "Hz, m, ft" }, "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": "5/5 legacy golden; 4/4 oracle-backed numeric" }, "CVP-BND-01": { "result": "PASS", "applicability": "required", "notes": "9/9 CVP boundary · 10/10 legacy Evidence boundary" }, "CVP-INV-01": { "result": "PASS", "applicability": "required", "notes": "9 invalid-domain cases" }, "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": "5/5 declared partitions (half, quarter, wavelength, length-factor, invalid-domain) · 5 legacy golden / 9 CVP boundary unique cases · 9 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 antenna-length; 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 @ 2026-10-29T01:22:37.788Z · live site-wide report stale @ 2026-10-29T01:22:46.998Z (212 other capabilities) · local checks pass · attestation_id=52c69c777f14b3653d6a0d99fffe81ea840d401226015698a80d3880c8382ade · This calculator CURRENT · This calculator is not affected · Bound attestation PASS @ 2026-10-29T01:22:37.788Z · Live production status STALE (212 capabilities; 164 remain CURRENT) @ 2026-10-29T01:22:46.998Z · Public schema 1.0.3 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.0.3 · 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 · cvp-reproduce-manifest-agree=pass · calculator-html-cvp-projection=pass · evidence-html-cvp-projection=pass · attested_evidence_sha256=0904162d9842ae579e660eb678ec02f2ca6e852dd03b716905c0a6501acd7dae · verified_at=2026-10-28T10:41:39.846Z · evidence_attested_at=2026-10-28T10:41:39.846Z · last_confirmed_current_at=2026-10-29T01:22:37.788Z · rendered_at=2026-10-29T01:22:47.259Z · binds=cvp_core_sha256", "check_result": "PASS", "production_state": "CURRENT", "binding_current": true }, "CVP-DIM-01": { "result": "PASS", "applicability": "applicable", "notes": "Length from frequency via SI speed of light" }, "CVP-PROP-01": { "result": "PASS", "applicability": "applicable", "notes": "13/13 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": "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 vectors (half, quarter, wavelength/full alias, k≠1, HF/VHF/UHF/LF). It is not a whole-domain antenna-model guarantee." }, "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 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": "91f324aac8fc24169c1e08de325ebd36227c10657f094d63046bb4c871a2d9e5", "evidence_digest": "053a5d12c9c6881b7b3d40f8b4d74a29796c8295157c3a7e9078d22416b6a39e", "production_sha256": "0904162d9842ae579e660eb678ec02f2ca6e852dd03b716905c0a6501acd7dae", "attested_catalog_sha256": "163b0d7072a58bed20a0320572211167e1629730bef43c185b5f545ceac7744c", "production_checks": [ { "id": "electrical.rf.antenna_length:output-const", "status": "pass", "detail": "output const 1.0.3 vs capability 1.0.3", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" }, { "id": "electrical.rf.antenna_length:evidence-sha256", "status": "pass", "detail": "c706c6c4b5c0", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" }, { "id": "electrical.rf.antenna_length:semantic-contract", "status": "pass", "detail": "28/28", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" }, { "id": "electrical.rf.antenna_length:capability-html-public-origin-agree", "status": "pass", "detail": "public 1.0.3 vs origin 1.0.3", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" }, { "id": "electrical.rf.antenna_length:cvp-manifest-public-origin-agree", "status": "pass", "detail": "electrical.rf.antenna_length/1.0.3/2026-10-28.meta-metrics-v2/engineering/053a5d12c9c6", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z", "projection_compared": false }, { "id": "electrical.rf.antenna_length:cvp-latest-alias-agrees", "status": "pass", "detail": "electrical.rf.antenna_length/1.0.3/2026-10-28.meta-metrics-v2/engineering/053a5d12c9c6", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z", "projection_compared": false }, { "id": "electrical.rf.antenna_length:cvp-immutable-manifest-fetch", "status": "pass", "detail": "public=200 origin=200", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" }, { "id": "electrical.rf.antenna_length:cvp-immutable-manifest-sha256", "status": "pass", "detail": "053a5d12c9c6", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" }, { "id": "electrical.rf.antenna_length:cvp-latest-alias-matches-immutable", "status": "pass", "detail": "electrical.rf.antenna_length/1.0.3/2026-10-28.meta-metrics-v2/engineering/053a5d12c9c6", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z", "projection_compared": false }, { "id": "electrical.rf.antenna_length:cvp-reproduce-manifest-agree", "status": "pass", "detail": "2026-10-28.meta-metrics-v2 · 26df4b460492", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" }, { "id": "electrical.rf.antenna_length:calculator-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" }, { "id": "electrical.rf.antenna_length:evidence-html-cvp-projection", "status": "pass", "detail": "matches Trust display", "scope": "last_attestation_snapshot", "current": true, "attestation_binding_current": true, "attested_at": "2026-10-28T10:41:39.846Z" } ], "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": "053a5d12c9c6881b7b3d40f8b4d74a29796c8295157c3a7e9078d22416b6a39e", "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": "053a5d12c9c6881b7b3d40f8b4d74a29796c8295157c3a7e9078d22416b6a39e", "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": "c706c6c4b5c03eb31296fd8ba0e72a32ee9b072ddee9974051468d59b628ef0b", "note": "Published Evidence JSON core — Trust freshness / production bind subject" }, { "name": "evidence_catalog_digest", "field": "artifacts.attested_catalog_sha256", "digest_scope": "capability_catalog", "value": "163b0d7072a58bed20a0320572211167e1629730bef43c185b5f545ceac7744c", "note": "Capability catalog integrity; site-wide, not per-suite fingerprint" } ] }, "cvp_core_sha256": "053a5d12c9c6881b7b3d40f8b4d74a29796c8295157c3a7e9078d22416b6a39e" }, "dependencies": [ { "name": "antenna-length-engine", "version": "1.0.3" }, { "name": "antenna-length-reference-oracle", "version": "1.0.0" }, { "name": "antenna-length-mpmath-o3-table", "version": "antenna-length-mpmath-o3" }, { "name": "node", "version": "22.20.0" } ], "attestation": { "status": "CURRENT", "href": "/.well-known/calculatorx-production-attestation.json", "id": "52c69c777f14b3653d6a0d99fffe81ea840d401226015698a80d3880c8382ade", "attested_at": "2026-10-28T10:41:39.846Z", "last_confirmed_current_at": "2026-10-29T01:22:37.788Z", "site_attestation_current": false, "capability_attestation_current": true, "bound_snapshot_status": "pass", "live_report_status": "stale", "bound_attested_at": "2026-10-29T01:22:37.788Z", "live_updated_at": "2026-10-29T01:22:46.998Z", "bound_snapshot": { "status": "pass", "attested_at": "2026-10-29T01:22:37.788Z", "site_stale_count": 212 }, "live_site_status": { "href": "/.well-known/calculatorx-production-attestation.json" }, "bound_snapshot_site_stale_count": 212, "site_stale_capability_count": 212, "evidence_attested_at": "2026-10-28T10:41:39.846Z" }, "domain_review": { "status": "ABSENT", "spec_version": "1.0.3", "external_third_party": false, "note": "Supplemental CalculatorX internal domain review — see internal_review" }, "timestamps": { "verified_at": "2026-10-28T10:41:39.846Z", "generated_at": "2026-10-28T10:41:39.846Z", "rendered_at": "2026-10-29T01:22:47.259Z", "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": 4, "total": 4, "failed": 0 }, "boundary": { "passed": 9, "total": 9, "failed": 0 }, "invalid": { "passed": 9, "total": 9, "failed": 0 }, "property": { "passed": 13, "total": 13, "failed": 0, "kind": "fixed" }, "round_trip": { "passed": 0, "total": 0, "failed": 0 }, "metamorphic": { "passed": 2, "total": 2, "failed": 0 }, "contract": { "passed": 6, "total": 6, "failed": 0 }, "cross_interface": { "passed": 5, "total": 5, "failed": 0 }, "o3": { "passed": 10, "total": 10, "failed": 0, "claim_scope": "≤2 ULP vs O3 applies only to the published tabulated vectors (half, quarter, wavelength/full alias, k≠1, HF/VHF/UHF/LF). It is not a whole-domain antenna-model guarantee.", "max_error_ulp": 1, "table_sha256": "26df4b46049215ca31a8ee7718629ccad4c6c45c7b5b19bb4b9d8415a55a0c31" } }, "numerical": { "representation": "IEEE-754 binary64", "tolerance": { "type": "ulp", "value": 2, "rationale": "λ=c/f elementary ops; ≤2 ULP vs separate-module O2 (same V8) and vs O3 tabulated vectors. Declared a priori.", "declared_before_evaluation": true }, "max_error_observed": 1, "claim_scope": "≤2 ULP vs O3 applies only to the published tabulated vectors (half, quarter, wavelength/full alias, k≠1, HF/VHF/UHF/LF). It is not a whole-domain antenna-model guarantee." }, "coverage": { "partitions": [ { "id": "half", "description": "Half-wave (λ/2)", "exercised": true, "case_count": 13 }, { "id": "quarter", "description": "Quarter-wave (λ/4)", "exercised": true, "case_count": 5 }, { "id": "wavelength", "description": "Corrected 1λ (k·λ₀)", "exercised": true, "case_count": 4 }, { "id": "length-factor", "description": "Non-unity length_factor / velocity_factor", "exercised": true, "case_count": 7 }, { "id": "invalid-domain", "description": "Invalid inputs", "exercised": true, "case_count": 9 } ] }, "reference": { "items": [ { "class": "O1", "reference_scope": "model", "scope": "model", "label": "CODATA c and λ = c/f antenna element fractions" }, { "class": "O3", "reference_scope": "expected_values", "scope": "expected_values", "label": "Precomputed mpmath high-precision oracle L=(c/f)·k·frac (80 dps) rounded to nearest binary64 — not V8 division", "engine": { "name": "antenna-length-mpmath-o3", "library": "mpmath 1.4.1", "mpmath_dps": 80, "precision_bits": 265, "independent_of_iut": true, "same_runtime_as_iut": false, "generator_version": "1.0.0", "generator_sha256": "fa005ab7aaf07656b946ddb6e89dff3e140bd307c5807952fb13e52f0f6593bf", "table_sha256": "26df4b46049215ca31a8ee7718629ccad4c6c45c7b5b19bb4b9d8415a55a0c31" } }, { "class": "O3", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Same O3 table vs IUT L_m; ≤2 ULP on tabulated vectors only, independent of Node/V8", "engine": { "name": "antenna-length-mpmath-o3", "library": "mpmath 1.4.1", "mpmath_dps": 80, "precision_bits": 265, "independent_of_iut": true, "same_runtime_as_iut": false, "generator_version": "1.0.0", "generator_sha256": "fa005ab7aaf07656b946ddb6e89dff3e140bd307c5807952fb13e52f0f6593bf", "table_sha256": "26df4b46049215ca31a8ee7718629ccad4c6c45c7b5b19bb4b9d8415a55a0c31" } }, { "class": "O2", "reference_scope": "expected_values", "scope": "expected_values", "label": "Separate-module λ=c/f antenna length oracle — same V8 binary64 as IUT", "engine": { "name": "antenna-length-reference", "precision_bits": 53, "independent_of_iut": true, "same_runtime_as_iut": true } }, { "class": "O2", "reference_scope": "numerical_behavior", "scope": "numerical_behavior", "label": "Same O2 module backs ≤2 ULP L_m comparison vs IUT (same V8; O3 covers implementation independence)", "engine": { "name": "antenna-length-reference", "precision_bits": 53, "independent_of_iut": true, "same_runtime_as_iut": true } } ] }, "links": { "legacy_evidence": "https://www.calculatorx.com/evidence/electrical.rf.antenna_length/1.0.3.json", "evidence_page": "https://www.calculatorx.com/evidence/electrical.rf.antenna_length/1.0.3", "calculator": "https://www.calculatorx.com/calc/electric/antenna-length", "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.rf.antenna_length/1.0.3.cvp.json", "manifest_immutable": "https://www.calculatorx.com/evidence/electrical.rf.antenna_length/1.0.3/2026-10-28.meta-metrics-v2.cvp.json", "reproduce": "https://www.calculatorx.com/evidence/electrical.rf.antenna_length/reproduce", "manifest_core": "https://www.calculatorx.com/evidence/electrical.rf.antenna_length/1.0.3/2026-10-28.meta-metrics-v2.053a5d12c9c6.cvp.json" }, "disclosure": { "policy": "calculatorx-public-evidence-v1", "full_validation": "private", "representation": "summary" } }