[edocecrous]

The parent didn't ask what antifragile means. The parent asked what non-linear, proactive, and self adaptive means, especially when taken as requirements for a software system.

Reading Taleb's book to answer that question is probably a lot like trying to extract evolved dogma out of a religious text because each of those words has taken on a life and meaning of their own in SE literature. You can probably eventually get close, but you're better off just reading a few SE papers on those topics and inferring the authors' intended meaning.