core/homeassistant/components/openai_conversation/services.yaml

generate_image:
  fields:
    config_entry:
      required: true
      selector:
        config_entry:
          integration: openai_conversation
    prompt:
      required: true
      selector:
        text:
          multiline: true
    size:
      required: true
      example: "512"
      default: "512"
      selector:
        select:
          options:
            - "256"
            - "512"
            - "1024"