In a presentation at Docker Con 2022, Shy Ruparel showed his iTerm2 terminal with an awesome completion/suggestion function. It shows command suggestions in a menu while typing, without pressing TAB key. It is also able to capture and show new possibilities dynamically, for example, the newly pulled 'fedora' image was shown as a new suggestion for 'docker run' command.

I did some researches on the Internet but couldn't find anything similar. Does anyone know what completion/suggestion software was use?

Screenshot: zsh-completion-screenshot

You can see it in action here: https://docker.events.cube365.net/dockercon/2022/content/Videos/ba325a70-52da-4d54-a382-82cb6b7b718d, at 00:28:31.

  • zsh is not a terminal, it's a shell, but it can or can be configured to tell a terminal to display its completions in various forms. That particular form is not something that comes builtin in zsh AFAIK, and it seems it needs some ability that is specific to one terminal emulator in particular as I've never seen a terminal that lets applications render menus like that. Commented Jun 8, 2022 at 6:41
  • Thanks for pointing out the different b/w a shell and a terminal. After looking at the screenshot again, I could see that it's iTerm2. Probably the completion is a plugin for iTerm2, I'm doing other researches in that direction. P/s: I updated the question accordingly.
    – maximus
    Commented Jun 8, 2022 at 15:31

1 Answer 1


I finally find out what was used, it is Fig, which adds "IDE-style autocomplete to your existing terminal". I've just downloaded it, now giving it a try for real experience.

You can download the tool from its home page or using brew:

brew install --cask fig

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