Window Swallowing & Fibonacci Tiling?

I'm a long time i3 user, I have a config that I'm comfortable and happy with that I use on all of my systems.

I've been considering making the switch to Wayland. I have an X11 tool that is a must-have for me, devour, a window-swallowing script.. I need to be able to launch programs graphical programs from a terminal without it spawning a new window (primarily for things like zathura).

I would also like to be able to change i3/Sway's default tiling behavior to a Fibonacci-style tiling. I do not currently have this, but would like to find a way to make it happen.

I'd prefer not to switch to Hyperland because I prefer a more minimal approach. I don't use i3-gaps or anything like that, I don't need Hyperland's "flashiness". I like i3/Sway for using text files for configuration, being well documented, and having a lot of support available online. I'm nervous to switch to even-more-fringe WM/Compositors due to lack of these things. even if they have the features I want out-of-the-box.

Does anyone have any recommendations? Thanks!