1. Slime-like interaction: In vim I'm used to [vim-slime](https://github.com/jpalardy/vim-slime) for interactive languages such as python but I couldn't yet find an equivalent way to do it in kakoune. I suspect there is an easy way to do something like this using `:new` or the tmux integration but I don't know how.
2. Executing commands in the underlying shell: With C/C++ I usually need to work only with a single file and a fast compile-run cycle. I have simple functions defined for compile and run in my vimrc so that I can do it with a simple key map but I'm not sure how to do this in kakoune. The problem is sometimes output of my program exceeds one line so `:echo` is not quite useful here.
3. ctags/cscope integration: I haven't really checked this yet but I need something for jumping around in large codebases.