I use :append-output, :insert-output to insert content from shell scripts in my files. However, :append-output, :insert-output and :sh do not provide a hint or autocomplete for executables (shell or otherwise) in my PATH.

Would it be feasible to do so? My suggestion would be to do something similar to :open, open a panel with my executables and adapt the suggestions when I type.

If this already exists elsewhere (both an implementation and/or an issue/Discussion), I'll happily close this issue and report there instead.