New Template - Two Way Settings Sensor - "Setting Slider"

There are currently
template switch - Bidirectional switch to device
template sensor - One way sensor from device
template light/climate - does bidirectional values and switches

But there is no basic basic “template analogue/setting/value”
that would do a bi-directional of a numerical value, depending which end changed it. Either update from device or set to device. The template then for example can make use of commandline_shell and commandline_sensor

This is specifically use for changing a % setting on a device, lots of devices out there have settings and currently can only be achieved by combination of many elements.