Firewood / Cord Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-120

Effect

Computation or source lookup only

Input and validation requirements

Very large finite-looking inputs overflow JavaScript arithmetic and produce Infinity rather than a finite cord value. Negative dimensions also produce a negative result unless physical-input validation rejects them.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "L_ft": 8,
    "W_ft": 4,
    "H_ft": 4
  },
  "expected_outputs": {
    "cords": 1
  },
  "working": "Volume = 8 ft × 4 ft × 4 ft = 128 ft³. Cords = 128 ÷ 128 = 1 cord."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json