Râu is written entirely in Elisp, even the communication with the wayland socket. External (to Emacs) Wayland Windows feel like Emacs buffers. Thus an Emacs user can use the already known keybindings and mechanisms from Emacs to manage windows.

Every output gets one fullscreen Emacs frame assigned that stays in the background. Every external Wayland Window gets one Emacs buffer assigned. When this buffer is displayed, the external Wayland Window for this buffer gets displayed exactly on top of the buffer.