[pro] How to interact with a running lisp instance?

[Nick Levine]

   Maybe your button should only allow "load this asdf system".  Then
   every code you use as a patch is a system that can be checked in --
   hopefully just the same as you'd have in a fresh image, though
   sometime you need special magic (unintern, fmakunbound, etc.) to
   upgrade a live system that you don't need in a dead one.

international-lisp-conference.org does precisely that (the "button"
being a backdoor URL).

- nick