{
  "title": "Reference versus real-browser render review",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "verdict": {"type": "string", "enum": ["pass", "concerns", "fail", "blocked"]},
    "image_artifacts": {
      "type": "array",
      "maxItems": 20,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "kind": {"type": "string", "enum": ["reference", "render"]},
          "relative_path": {"type": "string", "minLength": 1},
          "sha256": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
          "viewport_width": {"type": ["integer", "null"], "minimum": 1}
        },
        "required": ["kind", "relative_path", "sha256", "viewport_width"]
      }
    },
    "mismatches": {
      "type": "array",
      "maxItems": 50,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "gate": {"type": "string", "enum": ["perceptual", "pixel_edge", "responsive", "browser_behavior", "accessibility"]},
          "severity": {"type": "string", "enum": ["high", "medium", "low", "note"]},
          "region": {"type": "string", "minLength": 1},
          "evidence": {"type": "string", "minLength": 1}
        },
        "required": ["gate", "severity", "region", "evidence"]
      }
    },
    "blockers": {"type": "array", "items": {"type": "string"}, "maxItems": 20}
  },
  "required": ["verdict", "image_artifacts", "mismatches", "blockers"],
  "allOf": [
    {
      "if": {"properties": {"verdict": {"const": "pass"}}, "required": ["verdict"]},
      "then": {"properties": {"image_artifacts": {"minItems": 2}, "mismatches": {"maxItems": 0}, "blockers": {"maxItems": 0}}}
    },
    {
      "if": {"properties": {"verdict": {"const": "blocked"}}, "required": ["verdict"]},
      "then": {"properties": {"blockers": {"minItems": 1}}}
    }
  ]
}