ad combines ideas from other editors and tools:

    - plan 9's acme
        - https://research.swtch.com/acme
        - http://acme.cat-v.org/

    - vi's modal editing
        - https://www.vim.org/
        - https://neovim.io/
        - https://kakoune.org/

    - dmenu's dynamic text filtering
        - https://tools.suckless.org/dmenu/
