# Vercy AI instruction — YAML 1.2 (JSON-compatible)
{
  "vercy": "1.0-draft",
  "metaModel": {
    "id": "world.r2-ledger-and-account",
    "name": "Ledger & Account",
    "version": "0.2.0-legacy",
    "family": "World Models",
    "category": "Reference example",
    "industry": [
      "Cross-industry"
    ],
    "domain": [
      "registries-ledgers"
    ],
    "tags": [
      "ledger",
      "account"
    ],
    "status": "legacy example"
  },
  "canonicalUrl": "https://ver.cy/models/world-r2-ledger-and-account/",
  "structure": {
    "bundles": [
      {
        "name": "chart",
        "description": "What accounts exist and whose they are",
        "layersText": "accountDefinition`: account kinds, units of quantity, opening and closing rules · `partyLinkage`: how accounts bind to identified holders and operators",
        "findings": []
      },
      {
        "name": "movement",
        "description": "How quantity moves between accounts",
        "layersText": "postingRules`: balance discipline, authorization, value dating · `postingLifecycle`: pending, appended, reversed states and contra-entries",
        "findings": []
      },
      {
        "name": "balance",
        "description": "Positions derived from movements",
        "layersText": "balanceDerivation`: how balances are struck from the posting stream · `statement`: periodic account statements for holders",
        "findings": []
      },
      {
        "name": "reconciliation",
        "description": "Agreement between records",
        "layersText": "matching`: pairing postings against external records or counter-ledgers · `discrepancy`: raising, investigating and closing mismatches",
        "findings": []
      }
    ]
  },
  "serviceLayers": {
    "artifactFormats": [],
    "policies": [],
    "crud": {},
    "roles": []
  },
  "legacySource": "/models/docs/registries-ledgers/R2-ledger-and-account.md",
  "migrationNotes": [
    "Findings, questions, artifacts, CRUD rules and access roles are not explicit in this legacy version."
  ]
}