So just checking my ~/bin directory tree, and the median line count for my 287 scripts is 4. I am unlikely to add this framework to these.

Here is one example called 'date8sl.sh':

  #!/bin/sh
  date +%Y/%m/%d

This gives the date in a nice slash delimited form, suitable for creating date-structured directories, as in

  mkdir  -pv $(date8sl.sh)

The longest of the useful ones is 22 lines.

My tendency is to put anything more complicated in code, these days preferring sbcl lisp with :inferior-shell, :cl-readline. Also occasionally python.

I'm just uncomfortable with shell scripts long enough to benefit from this framework.