{
  "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
      } ]
    } ]
  } ]
}