Basal Metabolic Rate → Weight Change Projector 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

t5-198

Effect

Computation or source lookup only

Input and validation requirements

An extreme but syntactically numeric input causes JavaScript floating-point overflow during daily_caloric_balance_kcal × duration_days, producing Infinity and therefore no valid finite projected weight. The instrument should reject or explicitly flag the result.

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": {
    "daily_caloric_balance_kcal_per_day": -500,
    "duration": 14,
    "duration_unit": "days"
  },
  "expected_outputs": {
    "total_energy_delta_kcal": -7000,
    "projected_weight_change_kg": -0.9090909
  },
  "working": "1. Daily balance = -500 kcal/day. 2. Duration = 14 days. 3. Total energy change = -500 × 14 = -7000 kcal. 4. Projected weight change = -7000 ÷ 7700 = -0.9090909 kg."
}

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