{
  "engine": "decimal.js",
  "version": "10.6.0",
  "precision": 40,
  "inputs": "Three strictly positive plain decimal levels <=1000000000, <=12 fraction digits",
  "contract": "Compatible same-unit prior original, prior revised and new-period level; syntax cannot validate source compatibility",
  "rule": "Original-base headline; revised-base period growth; same-original-base additive contributions; multiplicative reconstruction",
  "not_computed": [
    "actual economic statistic",
    "source compatibility",
    "forecast surprise",
    "market causality",
    "probability",
    "account return",
    "independent financial master"
  ]
}