Weather and comfort report.yaml

alias: Weather and comfort report
sequence:
  - action: ai_task.generate_data
    data:
      task_name: weather comfort report
      instructions: |
        Based on the current conditions:
        - Outdoor temperature: {{ states('sensor.outdoor_temperature') }}°C
        - Indoor temperature: {{ states('sensor.family_room_temperature') }}°C
        - Indoor humidity: {{ states('sensor.family_room_humidity') }}%

        Generate a funny weather description and assess indoor comfort level.
      structure:
        weather_description:
          description: A humorous description of the current weather outside
          required: true
          selector:
            text: null
        indoor_comfort:
          description: Assessment of how comfortable it is inside compared to outside
          required: true
          selector:
            text: null
    response_variable: comfort_report
  - action: notify.persistent_notification
    data:
      title: 🏠 Home climate report
      message: |
        🌤️ **Weather outside:**
        {{ comfort_report.data.weather_description }}

        🛋️ **Indoor comfort:**
        {{ comfort_report.data.indoor_comfort }}

Hmmmm!? I get: Message malformed: extra keys not allowed @ data['sequence']

Hmmmm!? I get: Message malformed: extra keys not allowed @ data['sequence']

I just test this script again and it worked flawlessly. Where did you get that error during saving of the script or when you are trying to execute it? Also double check that you are saving the above YAML code as script and not as automation

Sorry, my bad!
Tinkering with HA when tired, is a bad idea...
Script! Not automation ;-)
It works fine :-)