Sounds fascinating. I realized that the functions for my interfaces would have to be generic and abstract to allow for the flexibility I wanted.

Could you give a short demonstration of an API modifying the interface as you described? That's what I'm curious about, and I'm not really sure how to do that.

Also, wrapping my use in an eval, would it be:

$interface="MyInterface"; #demo, could be any of my interface packages
eval "use $interface";
die "Interface dead" if $@;

#...rest of program here
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