https://github.com/metakirby5/codi.vim this is similar to a nREPL client in some ways.

I just played with hooking it up lumo, quite fun

nice! It looks like an interesting project

It is. They've probably also solved problems like output buffers & such

https://github.com/roxma/nvim-completion-manager also, this vs deoplete, because it is callback based, whilst all current sources are python, no reason they must be.

holy moly - in the preview gif is this plugin autocompleting from the other tmux frame?!?

Yes, yes it is

mother of god...

I've seen an autocomplete that uses the OSX magic thingy to pull autocompletions from text in your open browser

https://github.com/roxma/nvim-completion-manager/issues/20 This opens up a lot of options!