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Public evidence

physics.optics.snell

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· Planar interface; TIR rejected · Protocol · Schema · Production report

Declared partition coverage
PASS · 2/2 declared partitions (snell, invalid-domain)
Versions
Calculation 1.0.0 · CVP protocol 1.0.0-proposed
CVP identity
1/1 property · digest 83f5975c3069

Verification

Legacy regression suite: 3/3 calculation tests · Production surface contract 4/4

Three distinct suites: educational examples on the calculator page, this legacy regression count (3/3 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. 1/1 golden · 1/1 CVP boundary · 1/1 invalid · 1/1 property · 1/1 cross-interface · 1/1 CVP contract. digest 83f5975c3069.

  • Golden (oracle-backed) 1 / 1
  • CVP boundary 1 / 1
  • Invalid input 1 / 1
  • Property 1 / 1
  • 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:d1d4bdd0524cc903b5f46a459b39c085fcfab6b66cc961ff67736bca10dc305b

Input schema sha256:139f8a0910675cb9efd6f72bef2055c918ed573d8501dfb26316481bbfeb08f2 · Output schema sha256:6558947ef76773cf2680e8842f841dc149a153501eec0a270a56f1851f8cda2b · 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
snell
Engine
snell
Engine build
2026-09-10
Evidence core
2026-09-06T13:16:40.891Z
Rendered
2026-09-16T22:03:43.762Z
Last reviewed
2026-08-09

Limitations

  • Geometric optics; TIR flagged as error in refraction modes

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
t2goldenpassExpected theta2_deg=48.59037789072913 · Actual mode=theta2 · n1=1.5 · n2=1 · theta1_deg=30 · theta2_deg=48.59037789072913
tirboundarypassExpected VALUE_OUT_OF_RANGE · Actual VALUE_OUT_OF_RANGE
property-snell-cpropertypass41.810314895778596