This recent quine challenge made me realise that we have a certain class of challenges that require answers to do something different each time they are run (at least for a finite amount of runs). This isn't too common but it's a recurring challenge feature, so I thought it might be nice to have a tag for these, so people can seek them out if they like them, and also to make it immediately clear to people if a challenge has this property or not (which is likely impossible in many esoteric languages).
My first idea was self-modification but these challenges don't necessarily require self-modification. Function answers will usually keep track of some global state between invocations and even programs have other means to fulfil the goal, e.g. by keeping track of state in files, using
localStorage for browser languages, etc.
So, the questions are: Should we introduce a tag for these? What should it be called? What should the tag's scope be?