{
  "name": "vocabulary",
  "description": "Lists available compiled slots",
  "signature": {
    "input": {
      "kind": "slot-name",
      "description": "Optional prefix filter for slot names",
      "required": false,
      "mode": "ValueOrExpression"
    },
    "output": {
      "mode": "Lambda",
      "kind": "slot-name-list,string-list",
      "element-kind": "slot-name,text",
      "description": "Resolves to available slot names as child nodes"
    }
  }
}