{
  "schema": {
    "thoughts": {
      "type": "array",
      "title": "Thoughts",
      "items": {
        "type": "string",
        "title": "A thought",
        "default": "Grmpf"
      }
    }
  },
  "form": [
    {
      "type": "tabarray",
      "items": [
        {
          "type": "section",
          "legend": "{{idx}}. {{value}}",
          "items": [
            {
              "key": "thoughts[]",
              "title": "Thought {{idx}}",
              "valueInLegend": true
            }
          ]
        }
      ]
    }
  ]
}