> Agent code can only be read and understood by agents.

This just fundamentally isn't true and if this is your perspective then you're using LLMs wrong.

There was always bad code. Extend that to the general challenge of a bad hire doing net-negative things for the company. AI is a new problem because it 1000x a bad hire's blast radius. Personally, I'd even state that AI tends to turn an average and sometimes-but-not-always-good hire into bad hires because finally they get to do the thing they've always wanted at lightning speed in a way that previously the company red-tape wouldn't allow.

> These giant files of doom were being generated by humans anyway

Right, I've never seen an agent produce code anywhere near as bad as some of the human-generated code that I've worked on.

And, if your agent is producing huge files or functions, you can just tell it not to and it'll comply.