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Public evidence

electrical.rf.skin_depth

Machine-checked verification for calculation version 1.0.0 · tier expert_verified

Open calculator API Capability Download JSON CVP Manifest MCP Review policy

CVP: CVP VERIFIED · CVP protocol 1.0.0-proposed · Engineering assurance· Good-conductor approximation; SI only · Protocol · Schema · Production report

Declared partition coverage
PASS · 2/2 declared partitions (nominal, invalid-domain)
Versions
Calculation 1.0.0 · CVP protocol 1.0.0-proposed
CVP identity
2/2 property · digest 29a379f1211f

Verification

Legacy regression suite: 6/6 calculation tests · Production surface contract 4/4

Three distinct suites: educational examples on the calculator page, this legacy regression count (6/6 golden + boundary), and the CVP verification suite below. They are not the same number. Property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the CVP Manifest . SKIP (0/0) means that suite has no published vectors.

    This calculator CURRENT · Public schema 1.0.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓

CVP verification suite

Protocol checks from the Evidence Manifest. Distinct from the legacy regression suite above. Calculation version 1.0.0. CVP 1.0.0-proposed. 2/2 golden · 2/2 CVP boundary · 2/2 invalid · 2/2 property · 1/1 cross-interface · 1/1 CVP contract. digest 29a379f1211f.

  • Golden (oracle-backed) 2 / 2
  • CVP boundary 2 / 2
  • Invalid input 2 / 2
  • Property 2 / 2
  • Cross-interface 1 / 1
  • CVP contract 1 / 1
  • Interfaces PASS · UI (SSR) / REST / MCP
  • Interface claim ui-ssr is query-result HTML, not a live browser session.
  • Assurance Engineering
  • release artifacts aligned PASS
  • schema valid input executes PASS
  • engine success output validates schema PASS
  • schema rejects incomplete input PASS

Fingerprint sha256:e21f6d199817e3257d0030e0837a0767fb429369d1715d3d9ccd9c1c94a2b0b2

Input schema sha256:53e2a079a2ade8b6e84248da892dc274102496951a6de1eeace8263eb744ee3f · Output schema sha256:077d9f5f5237c36c8d07e781e1ecf0d69f4a5818530b7ac7c3ed034b81a908f1 · Build-time SHA-256 digests prove published artifacts agree with each other (release_integrity.scope=workspace). Production attestation GETs canonical URLs twice (public/cached view and origin), including Capability HTML, via npm run attest:production --write (published at /.well-known/calculatorx-production-attestation.json) and fails if the public Capability page advertises a different calculation_version. This is artifact consistency, not an independent immutable release log.

Build & scope

Engine identity and declared limitations.

Tool
skin-depth
Engine
skin-depth
Engine build
2026-09-10
Evidence core
2026-09-06T13:16:40.891Z
Rendered
2026-09-16T22:03:43.731Z
Last reviewed
2026-08-08

Limitations

  • Good-conductor approximation

Sources

Standards and references supporting this tool specification. Methods are listed separately — they are algorithms, not bibliographic sources.

Legacy published checks

Golden and boundary cases from the legacy Evidence JSON. CVP property, metamorphic, round-trip, O3, and interface statuses/checks are recorded in the Manifest — including SKIP when a suite has no vectors.

IDKindStatusDetail
cu-1mhzgoldenpassExpected delta_m=0.00006523411464087014 · Actual mode=skin · f_Hz=1000000 · rho_ohm_m=1.68e-8 · mur=1 · mu=0.0000012566370614359173 · delta_m=0.00006523411464087014 · delta_um=65.23411464087015 · delta_mm=0.06523411464087014
bad-fboundarypassExpected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
missingboundarypassExpected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT
halfgoldenpassExpected delta_m=0.00003261705732043507 · Actual mode=skin · f_Hz=4000000 · rho_ohm_m=1.68e-8 · mur=1 · mu=0.0000012566370614359173 · delta_m=0.00003261705732043507 · delta_um=32.61705732043507 · delta_mm=0.03261705732043507
property-skinpropertypassδ
property-halfpropertypass4f → δ/2