{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://wanxiang.ai/contracts/play-loop/match3-visual-transaction.schema.json",
  "title": "Match3VisualTransactionV1",
  "description": "视觉事务 sidecar 的最小可信投影；保留 move、轮次命中和 runtime transactionHash。",
  "type": "object",
  "required": [
    "schemaVersion", "transactionId", "transactionHash", "moveId", "valid",
    "visualComplete", "degradedReason", "rounds"
  ],
  "properties": {
    "schemaVersion": { "const": "Match3VisualTransaction/1" },
    "transactionId": { "$ref": "#/$defs/id" },
    "transactionHash": { "$ref": "#/$defs/sha256" },
    "moveId": { "$ref": "#/$defs/id" },
    "valid": { "type": "boolean" },
    "visualComplete": { "type": "boolean" },
    "degradedReason": { "anyOf": [{ "enum": ["round_limit", "duration_limit"] }, { "type": "null" }] },
    "rounds": { "type": "array", "maxItems": 7, "items": { "$ref": "#/$defs/round" } }
  },
  "additionalProperties": false,
  "$defs": {
    "sha256": { "type": "string", "pattern": "^[0-9a-f]{64}$" },
    "id": { "type": "string", "pattern": "^[A-Za-z0-9][A-Za-z0-9._-]{0,127}$" },
    "cell": {
      "type": "object",
      "required": ["row", "column"],
      "properties": {
        "row": { "type": "integer", "minimum": 1, "maximum": 8 },
        "column": { "type": "integer", "minimum": 1, "maximum": 8 }
      },
      "additionalProperties": false
    },
    "round": {
      "type": "object",
      "required": ["cascadeIndex", "matchedCells"],
      "properties": {
        "cascadeIndex": { "type": "integer", "minimum": 0, "maximum": 6 },
        "matchedCells": { "type": "array", "minItems": 3, "items": { "$ref": "#/$defs/cell" } }
      },
      "additionalProperties": false
    }
  }
}