Public evidence

units.temperature.celsius_kelvin

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· Absolute zero floor · Protocol · Schema · Production report

Declared partition coverage: PASS · 2/2 declared partitions (celsius-kelvin, invalid-domain)
Versions: Calculation 1.0.0 · CVP protocol 1.0.0-proposed
CVP identity: 2/2 property · digest 599cc260cf9c

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. 1/1 golden · 2/2 CVP boundary · 2/2 invalid · 2/2 property · 1/1 cross-interface · 1/1 CVP contract. digest 599cc260cf9c.

Golden (oracle-backed) 1 / 1
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 sha256:23cc8adc3695d881c26d7e0fe82d28caf8480090341d5aa869b100b9453a01cb

Input schema sha256:a14f2e95659e10c31f38d519e7a1fc8756b33a05a269232533cb84f45eb9cf15 · Output schema sha256:e10d7df0b3290002803e6e73e9319d982149662218d43d22bcd6a0b1e42c4dc5 · 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: celsius-kelvin
Engine: celsius-kelvin
Engine build: 2026-09-10
Evidence core: 2026-09-06T13:16:40.891Z
Rendered: 2026-09-16T22:03:43.746Z
Last reviewed: 2026-08-09

Limitations

Not Fahrenheit/Rankine

Sources

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

SI temperature units — Kelvin / Celsius relation
Supports: K = °C + 273.15
NIST / SI temperature — kelvin and Celsius
Supports: T/K = t/°C + 273.15

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.

ID	Kind	Status	Detail
`25C`	golden	pass	Expected 298.15 · Actual 298.15
`0K`	golden	pass	Expected -273.15 · Actual -273.15
`neg-K`	boundary	pass	Expected VALUE_OUT_OF_RANGE · Actual VALUE_OUT_OF_RANGE
`missing`	boundary	pass	Expected MISSING_REQUIRED_INPUT · Actual MISSING_REQUIRED_INPUT
`property-25C`	property	pass	298.15
`property-roundtrip`	property	pass	25