Public evidence

electrical.pcb.trace_thermal

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· Lumped Rth; default copper ρ · Protocol · Schema · Production report

Declared partition coverage: PASS · 3/3 declared partitions (rise, power, invalid-domain)
Versions: Calculation 1.0.0 · CVP protocol 1.0.0-proposed
CVP identity: 1/1 property · digest 2f9ad6e41010

Verification

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

Three distinct suites: educational examples on the calculator page, this legacy regression count (4/4 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 · 1/1 CVP boundary · 1/1 invalid · 1/1 property · 1/1 cross-interface · 1/1 CVP contract. digest 2f9ad6e41010.

Golden (oracle-backed) 2 / 2
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:fd9e715cfa719fcd06d83f433d33ab62ed0b7df67d6961aa7bf3894deebe83cd

Input schema sha256:48f72081a3f83919941edcb1332c070d71af16d2dedb850179655860e454ac7c · Output schema sha256:ebf06f24de63198fff85739d66316d2d79b25f2fd65ec7d545f3af857f739f59 · 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: pcb-trace-thermal
Engine: pcb-trace-thermal
Engine build: 2026-09-10
Evidence core: 2026-09-06T13:16:40.891Z
Rendered: 2026-09-16T22:03:43.744Z
Last reviewed: 2026-08-08

Limitations

Uniform copper; lumped board Rth

Sources

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

IPC / copper resistivity practice — I²R heating
Supports: R=ρL/A; P=I²R
JEDEC / PCB thermal design notes — Lumped Rth rise
Supports: dT = P·Rth

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
`rise`	golden	pass	Expected dT_C=240 · Actual mode=rise · I_A=10 · L_m=0.1 · W_m=0.001 · t_m=0.000035 · rho_ohm_m=1.68e-8 · A_m2=3.4999999999999996e-8 · R_ohm=0.04800000000000001
`power`	golden	pass	Expected P_W=4.8 · Actual mode=power · I_A=10 · L_m=0.1 · W_m=0.001 · t_m=0.000035 · rho_ohm_m=1.68e-8 · A_m2=3.4999999999999996e-8 · R_ohm=0.04800000000000001
`bad-I`	boundary	pass	Expected VALUE_MUST_BE_POSITIVE · Actual VALUE_MUST_BE_POSITIVE
`property-dT`	property	pass	240