in reply to Converting a coderef back to code

I am wondering if it's possible to 'stringify' a coderef

Yes, this is possible:

my $stringify = B::Deparse->new->coderef2text($coderef);

See Is it useful to edit code at execution time? for an example of what you are trying to accomplish (I'm happy to see that you will give a "yes" to that question). Also, the module Sub::Compose uses this technique.

Hope this helps,