Question

In Vim CLI (with a script, and without relying on a plugin), is it possible to imitate :

:browse old

and create a numbered menu (e.g.of scripts) ?

Answer 1

Maybe you are looking for inputlist?

 " build your list in whatever way is appropriate for your task
let somelist = map(range(1,&lines-2), '"Item #".v:val')

let numberedlist = map(copy(somelist), 'string(v:key+1).": ".v:val')
let chosen = inputlist(['Pick an item:'] + numberedlist)
if 0 < chosen && chosen < len(somelist)
  echo 'User chose item #' . chosen . ': <<<' . somelist[chosen-1] . '>>>'
else
  echo 'Invalid selection!'
endif