I have been aware of Monado's existence for a few years now, but could never figure out how one is supposed to integrate it into a development workflow.

Do you build an OpenXR application with Godot/Unity/etc and then build monado on your computer, and have to write some code using the SDK to launch your app in your target connected XR device? Or do you run Monado like a backgrounded server somehow and register compliant applications and hardware to it, enabling you to run them in the device.