{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:corpus-turn-order-decision:v1",
  "title": "Corpus Turn Order Decision v1",
  "description": "Prompt-free result of resolving one exact target-free Corpus turn-order offer; it is evidence, not Room authority.",
  "x-dia-workflow": "project",
  "x-dia-status": "accepted",
  "x-dia-basis": ["doc/project/40-proposals/069-corpus.md"],
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema", "schema/v", "decision/ref", "decision/digest", "offer/ref", "offer/digest",
    "source", "ordered/candidate-refs", "selected/candidate-ref", "decided-at"
  ],
  "properties": {
    "schema": { "const": "corpus-turn-order-decision.v1" },
    "schema/v": { "const": 1 },
    "decision/ref": { "type": "string", "pattern": "^corpus-turn-order-decision:sha256:[A-Za-z0-9_-]{43}$" },
    "decision/digest": { "$ref": "#/$defs/digest" },
    "offer/ref": { "type": "string", "pattern": "^corpus-turn-order-offer:sha256:[A-Za-z0-9_-]{43}$" },
    "offer/digest": { "$ref": "#/$defs/digest" },
    "source": { "enum": ["distribution-policy", "operator-policy"] },
    "operator/authority-decision-ref": { "type": "string", "pattern": "^authority-decision:[A-Za-z0-9_-]+$", "maxLength": 512 },
    "ordered/candidate-refs": {
      "type": "array",
      "minItems": 1,
      "maxItems": 16,
      "uniqueItems": true,
      "items": { "$ref": "#/$defs/candidate-ref" }
    },
    "selected/candidate-ref": { "$ref": "#/$defs/candidate-ref" },
    "decided-at": { "type": "string", "format": "date-time" }
  },
  "allOf": [
    {
      "if": {
        "required": ["source"],
        "properties": { "source": { "const": "operator-policy" } }
      },
      "then": { "required": ["operator/authority-decision-ref"] },
      "else": { "not": { "required": ["operator/authority-decision-ref"] } }
    }
  ],
  "$defs": {
    "digest": { "type": "string", "pattern": "^sha256:[A-Za-z0-9_-]{43}$" },
    "candidate-ref": { "type": "string", "pattern": "^corpus-turn-order-candidate:sha256:[A-Za-z0-9_-]{43}$" }
  }
}