What auto-entities does is it takes any lovelace card, and populates the entities parameter of it.
Eg:
type: custom:auto-entities
filter:
include:
- domain: light
card:
type: entities
title: My lights
will turn into
type: entities
title: My lights
entities:
- entity: light.all
- entity: light.your
- entity: light.lights
And the options are added to each entity that matches that filter, such that:
type: custom:auto-entities
filter:
include:
- domain: light
options:
icon: mdi:gear
card:
type: entities
title: My lights
is turned into
type: entities
title: My lights
entities:
- entity: light.all
icon: mdi:gear
- entity: light.your
icon: mdi:gear
- entity: light.lights
icon: mdi:gear