I recently built myself one of these keyboards, the Quefrency rev. 3, from Keebio.
It’s a split keyboard that uses an ATmega32u4 microcontroller and supports the popular QMK firmware.

There’s also a nice accompanying program, VIA, which can modify the keymap of your keyboard, and all kinds of other stuff, such as lighting and configuring what the different keyboard layers do.

But, VIA can’t change what the rotary encoders do. For that, you’ll have to modify the firmware and update your keyboard manually.

For users using the agnoster theme on zsh that wish to use the path style from the shrink-path plugin, there isn’t a straightforward way yet to enable this (As of now there is a PR open for this).

A quick workaround could be to just add the plugin output in the theme itself.