[fredsir]

If I'm not mistaken, that's one of the features of Tslime[1], which is a Vim plugin that allows Vim to communicate with Tmux.

[1]: https://github.com/jgdavey/tslime.vim/

[leblancfg]

Yup! There are in fact quite a few similar vim plug-ins that do the same.

This is one of the longest-standing line in my vimrc so far:

    Plug 'epeli/slimux'

Works best for what I do.