discourse-custom-wizard/spec/fixtures/actions/create_topic.json

{
  "id": "create_topic_1",
  "type": "create_topic",
  "post_builder": true,
  "post_template": "First post in the topic!",
  "title": [
    {
      "type": "assignment",
      "output_type": "text",
      "output_connector": "set",
      "output": "My new topic"
    }
  ]
}