{
  "display_rule": "registered derived rationals: three decimals, nearest, half away from zero; do not infer source accuracy from display",
  "exact_numeric_encoding": "reduced rational strings where applicable; source indices/counts are not rounded before comparison",
  "limitations": [
    "CPI supplementary series, not headline CPIH",
    "Survey aggregate, not an individual or same-worker panel",
    "Single-month annual growth, not three-month headline growth",
    "Pandemic composition is not corrected",
    "Exact index states are not statistically significant recovery claims",
    "0.1-index sensitivity is not a confidence interval",
    "Frozen vintage, not a current pay service"
  ],
  "method_version": "h6-experimental-1",
  "source_row_references": "line numbers include header; H6 workbook cell/date lineage in complete result",
  "source_units": "index 2015=100; derived percentage change"
}