If you want to really confuse your replacement, do what my predecessor did: write class (has a new() method which returns a blessed reference) with methods that are named (by convention) as private ( sub _do_something { } ) or "double private" ( sub __double_secret_probation { } ) and then add them to @EXPORT. Oh, and while you're at it, add every subroutine to @EXPORT. That'll teach people to learn a convention and then have unfair expectations when they see it used elsewere.

I think my predecessor lived (and may die) by this.