{
  "observation": "One selected named dish at an exact branch; price is USD before unmodeled tax and other purchases.",
  "format": "Individual Main or Per-Person Package; do not pool them.",
  "checkedAt": "Actual menu-source review or retrieval date, not proof of a newly printed menu.",
  "selectionNotes": "Known portion and inclusion context; unknown portions remain unstandardized.",
  "sourceEvidenceHash": "SHA-256 of captured source where available; original pilot provenance remains in its prior version.",
  "sourceReview": "Editorial source review or structured item/visible-price/address verification, not an independent operator confirmation.",
  "cityName": "Restaurant postal place label; municipal boundary not independently geocoded.",
  "sourceGroup": "Source-domain grouping is a proxy for clustering, not verified restaurant ownership.",
  "charges": "Only verified terms; empty list means unestablished, not a zero-fee guarantee.",
  "coffee": "One verified regular order with a separate source date; sizes and refills are not standardized.",
  "collectionPanel": "Candidate branches and source outcomes; no approved row is not a closure or a zero price.",
  "version": "2026-10-25-national-menu-study-v1",
  "currency": "USD",
  "categoryMedian": "Median of within-branch selected-item medians; each branch receives equal weight within the category. Descriptive of this panel only.",
  "paymentMethod": "unspecified, cash_debit or credit_card. A relevant card-dependent fee with unknown payment withholds the combined estimate.",
  "chargeBase": "Modeled pre-tax selected-food-and-coffee subtotal. Multiple applicable charges with unresolved stacking produce no combined total.",
  "amountRounding": "Convert menu prices to integer cents. Multiply quantities, then round each single applicable percentage charge to the nearest cent.",
  "localBriefs": "One record per actual postal place in the approved panel, with named examples and official sources. Not a city ranking.",
  "missingnessDenominators": "1,692 branch candidates; 3,770 attempted source URLs; 3,517 HTTP 200 source responses; 179 branches with approved prices; 18 with documented charge policies; 8 with separately priced regular coffee. These denominators measure different things.",
  "shareableURLs": "Explorer filters and planner scenarios preserve selected parameters in URLs. Filtered pages use the index canonical and noindex,follow. No separate city-research pages are generated."
}