fvim VS vimr

fvim and goneovim have support for gui-widgets.nvim which is a sort of protocol to define images and let Neovim GUIs display them.

fvim has a cool idea of having a common protocol for ui extensions: https://github.com/yatli/gui-widgets.nvim

While there is Avalonia.FuncUI you can use Avalonia with only F#/Xaml as well, take https://github.com/yatli/fvim as an example it's an avalonia app and doesn't use the FuncUI DSL but you'll have to handle your views in an OOP'ish way

I use fvim to meet the use case you describe. I love it.

For the commenters here: do we have something like VimR [1] for OSes other than the Mac that provides a file explorer sidebar with smaller font size (probably sans)?

[1]: https://github.com/qvacua/vimr

I'm loading sessions at BufReadPost (also tried BufReadPre, which didn't work) instead of VimEnter because I couldn't find a way to find out the "true" CWD at VimEnter. I use VimR, which seems to launch nvim without any arguments even when I launch it from the command line like vimr path/to/file.ext or opening a file in macOS Finder, and set the CWD to $HOME instead of path/to. So at VimEnter, I'm only able to restore a session saved for $HOME, but not my project directory.

https://github.com/qvacua/vimr and https://github.com/qvacua/neovim/tree/5f8dd8c4a33203277cf6058f559383626411693d are good places to start

I've never tried a GUI version of Neovim, and this is the first I've heard of MacVim. Are you referring to VimR? If so, it seems like the problem could have been with the third party GUI software instead of the core Neovim software.