Self fulfilling prophecy: You don't need to secure anything because it doesn't make a difference, as Mythos is not just a delicious Greek beer, but also a super-intelligent system that will penetrate any of your cyber-defenses anyway.
In some ways Mythos (like many AI things) can be used as the ultimate accountability sink.
These libraries/frameworks are not insecure because of bad design and dependency bloat. No! It's because a mythical LLM is so powerful that it's impossible to defend against! There was nothing that could be done.