I would like to submit a new package to ELPA. It enchances eshell and
comint (M-x shell for example) by displaying an "auto-suggestion" as you
type, a preview of the most recent matching history element.

Example: if your command history contains "wget example.com" and you
type "wg" at the command prompt, an overlay containing "et example.com"
will be shown after point. You can then type [C-e] to insert the text
from the overlay or [M-f] to insert a word from the overlay and so on.

If there aren't any history candidates that match input, an overlay for
the first completion candidate will be shown.

This package is inspired by the same functionality from the fish
shell[1] and zsh-autosuggestions[2] plugin for the zsh shell.

Source code is available at https://repo.or.cz/emacs-coterm.git

Thanks and best regards.

[1] https://fishshell.com/
[2] https://github.com/zsh-users/zsh-autosuggestions