Net Worth Tracker/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

t5-214

Effect

Computation or source lookup only

Input and validation requirements

The extreme-magnitude vector overflows typical JavaScript Number arithmetic to Infinity even though the mathematical result is 2e308. The convention probe also exposes a potentially material sign-entry ambiguity that can produce 9500 or 10500 from the same displayed figures.

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": {
    "assets": [
      {
        "name": "cash",
        "amount": 2500,
        "currency": "USD"
      },
      {
        "name": "investments",
        "amount": 12500,
        "currency": "USD"
      },
      {
        "name": "car",
        "amount": 8000,
        "currency": "USD"
      }
    ],
    "liabilities": [
      {
        "name": "credit card",
        "amount": 1200,
        "currency": "USD"
      },
      {
        "name": "auto loan",
        "amount": 4500,
        "currency": "USD"
      }
    ]
  },
  "expected_outputs": {
    "asset_total_usd": 23000,
    "liability_total_usd": 5700,
    "net_worth_usd": 17300
  },
  "working": "Asset total: 2,500 + 12,500 = 15,000; 15,000 + 8,000 = 23,000. Liability total: 1,200 + 4,500 = 5,700. Net worth: 23,000 − 5,700 = 17,300 USD."
}

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