Very smooth, downloaded it and played around a bit.

My first thought is why not use built-in shell autocompletion functions instead of redefining them in JS?

Zsh completions are super powerful: https://github.com/zsh-users/zsh-completions/blob/master/zsh...

Typing `git a` yields this in my terminal:

    ~ git add
    add        -- add file contents to index
    am         -- apply patches from a mailbox
    apply      -- apply patch to files and/or to index
    archimport -- import an Arch repository into git
    archive    -- create archive of files from named tree

(btw, broken link at the bottom of this page: https://fig.io/docs/getting-started - https://fig.io/concepts/dynamic-suggestions should be https://fig.io/docs/concepts/dynamic-suggestions)

ble.sh[0] is also good autocompletion and syntax highlighting solution for bash.

[0]: https://github.com/akinomyoga/ble.sh