{
  "$schema": "https://openpresentation.org/schema/opf/v1",
  "name": "Block Composition",
  "description": "Technical fixture showing multiple content payloads in a renderer-positioned blocks array.",
  "slides": [
    {
      "title": "Mixed Evidence Blocks",
      "blocks": [
        {
          "metric": {
            "value": "18%",
            "label": "Cycle time reduction",
            "trend": "up"
          }
        },
        {
          "chart": {
            "type": "column",
            "data": {
              "columns": [
                "Sprint",
                "Escalations"
              ],
              "rows": [
                [
                  "S1",
                  14
                ],
                [
                  "S2",
                  10
                ],
                [
                  "S3",
                  6
                ]
              ]
            }
          }
        },
        {
          "quote": {
            "text": "Blocks let authors provide coherent content without deciding exact placement.",
            "attribution": "Layout resolver"
          }
        },
        {
          "table": {
            "columns": [
              "Block",
              "Renderer decision"
            ],
            "rows": [
              [
                "Metric",
                "Hero number"
              ],
              [
                "Chart",
                "Main visual"
              ],
              [
                "Quote",
                "Supporting proof"
              ]
            ]
          }
        }
      ]
    }
  ]
}