sensors.yaml:

- platform: rest
  name: Home Assistant Docker Latest Image Build
  scan_interval: 300
  resource: https://registry.hub.docker.com/v1/repositories/homeassistant/home-assistant/tags
  headers:
    Content-Type: application/json
    User-Agent: Home Assistant REST sensor
  value_template: >-
        {% for image_build in value_json | reverse if image_build.name.split(".")[0]=="0"  %}
          {% if loop.first %}
               {{image_build.name}}
          {% endif %}
        {% endfor %}
- platform: rest
  name: Home Assistant Released Version
  scan_interval: 300
  json_attributes:
      - body
      - html_url
  resource: https://api.github.com/repos/home-assistant/home-assistant/releases/latest
  username: !secret github_username
  password: !secret github_access_token
  authentication: basic
  value_template: '{{ value_json.tag_name }}'
  headers:
    Accept: application/vnd.github.v3+json
    Content-Type: application/json
    User-Agent: Home Assistant REST sensor

- alias: Home Assistant Release Check
  initial_state: on
  trigger:
  - platform: template
    value_template: >-
      {% if states.sensor.home_assistant_released_version %}
        {% if states.sensor.current_version %}
          {% if states.sensor.home_assistant_docker_latest_image_build %}
            {% if states('sensor.home_assistant_released_version') != states('sensor.current_version') %}
              {{ states('sensor.home_assistant_released_version') == states('sensor.home_assistant_docker_latest_image_build') }}
            {% endif %}
          {% endif %}
        {% endif %}
      {% endif %}
  - platform: homeassistant
    event: start
  condition:
    condition: and
    conditions:
      - condition: template
        value_template: >-
          {% if states.sensor.home_assistant_released_version %}
            {% if states.sensor.current_version %}
              {% if states.sensor.home_assistant_docker_latest_image_build %}
                {% if states('sensor.home_assistant_released_version') != states('sensor.current_version') %}
                  {{ states('sensor.home_assistant_released_version') == states('sensor.home_assistant_docker_latest_image_build') }}
                {% endif %}
              {% endif %}
            {% endif %}
          {% endif %}
  action:
  - service: persistent_notification.create
    data_template:
      title: Home Assistant Release
      notification_id: hass_release_{{states('sensor.home_assistant_docker_latest_image_build')}}
      message: >-
        A new version of Home Assistant is available, {{ states('sensor.home_assistant_released_version') }}, while current version is {{states('sensor.current_version') }}

        Link: {{states.sensor.home_assistant_released_version.attributes.html_url}}

        Release notes:

        {{states.sensor.home_assistant_released_version.attributes.body.split("## All changes")[0]}}

  - service: notify.telegram_notifier
    data_template:
      message: >-
        A new version of Home Assistant is available, {{ states('sensor.home_assistant_released_version') }}, while current version is {{states('sensor.current_version') }}

        Link: {{states.sensor.home_assistant_released_version.attributes.html_url}}