Allow setting custom attributes when creating "helpers" from UI

[Sir_Goodenough ((SG) WhatAreWeFixing.Today)]

Extend Sensor with custom attribute

It’s possible to add custom attributes to an existing entity. You can do it via Configuration > Customizations or by adding the new attribute to the customize.yaml file (explained here). However, the custom attribute’s value cannot be defined by a template. The value must be a constant like a string or integer. It is possible to change the value of an entity’s state or attribute. It can be done with a python_script like this one. However, that change is not permanent and is lost when Home Assi…

Is there a way to create custom attributes for entities?

Yes, just add them via customize as you can see here: https://github.com/PedroLamas/home-assistant-config/blob/acb58a2b9d6cec24d2c5f2e88548df155ed43352/config/customize.yaml#L25 I do it myself and use those extra attributes in automation and scripting!