RemindMe engine for Home Assistant - Task reminder notifications

reminders.auto.yaml

alias: RemindMe - Task Reminders
description: ""
trigger:
  - platform: time_pattern
    minutes: "10"
  - platform: time_pattern
    minutes: "25"
  - platform: time_pattern
    minutes: "40"
  - platform: time_pattern
    minutes: "55"
condition: []
action:
  - service: todo.get_items
    metadata: {}
    data:
      status: needs_action
    target:
      entity_id:
        - todo.remind_me
    response_variable: itemlist
  - repeat:
      for_each: "{{ itemlist['todo.remind_me']['items'] }}"
      sequence:
        - service: persistent_notification.create
          metadata: {}
          data:
            title: Forced
            message: "{{ repeat.item }}"
          enabled: false
        - choose:
            - conditions:
                - condition: template
                  value_template: "{{ as_datetime(repeat.item.due) < now() }}"
              sequence:
                - if:
                    - condition: state
                      entity_id: input_boolean.remindme_unforgettable_reminders
                      state: "on"
                  then:
                    - service: persistent_notification.create
                      metadata: {}
                      data:
                        title: "{{ repeat.item.summary }}"
                        message: "Overdue: {{ repeat.item }}"
                      enabled: false
                    - service: notify.reminder_notification_group
                      metadata: {}
                      data:
                        message: "{{ repeat.item.summary }}"
                        data:
                          group: Reminders
                          channel: Reminders-PastDue
                          importance: low
                          sticky: "true"
                          persistent: true
                          alert_once: true
                          notification_icon: mdi:reminder
                          tag: "{{ repeat.item.summary }}"
                          origdata: "{{ repeat.item }}"
                          origdue: "{{ repeat.item.due }}"
                          url: /todo?entity_id=todo.remind_me
                          clickAction: /todo?entity_id=todo.remind_me
                          actions:
                            - action: Reminder-Complete
                              title: Complete
                            - action: Reminder-Snooze2hr
                              title: 2 Hours
                            - action: Reminder-Snooze1day
                              title: Tomorrow
            - conditions:
                - condition: template
                  value_template: >-
                    {{ as_datetime(repeat.item.due) < now() +
                    timedelta(minutes=15) }}
              sequence:
                - service: persistent_notification.create
                  metadata: {}
                  data:
                    title: "Upcoming: {{ repeat.item.summary }}"
                    message: "{{ repeat.item }}"
                  enabled: false
                - service: notify.reminder_notification_group
                  metadata: {}
                  data:
                    message: "{{ repeat.item.summary }}"
                    data:
                      group: Reminders
                      channel: Reminders-Active
                      importance: default
                      sticky: "true"
                      persistent: true
                      alert_once: true
                      notification_icon: mdi:reminder
                      tag: "{{ repeat.item.summary }}"
                      origdata: "{{ repeat.item }}"
                      origdue: "{{ repeat.item.due }}"
                      url: /todo?entity_id=todo.remind_me
                      clickAction: /todo?entity_id=todo.remind_me
                      actions:
                        - action: Reminder-Complete
                          title: Complete
                        - action: Reminder-Snooze2hr
                          title: 2 Hours
                        - action: Reminder-Snooze1day
                          title: Tomorrow
mode: single

This is called every 15 minutes and sends reminders for any tasks coming up in the next 15 minutes.
It also sends re-reminders for any that are past due (optional with a helper boolean) - this guarantees reminders can't get swiped away or lost when your phone restarts, they'll keep popping up until marked Complete or snoozed.
It would be cool if HA has an automation trigger when a task becomes due, like calendar events starting.