They had six days to make him fun.
RustCorp is out of ideas. Its founder, Evan Rust, is nearly ninety, over-leveraged, and six days from testifying before a Congress that would like him regulated out of existence. So he does what any desperate genius would do. He prints a younger, smarter copy of himself.
Xan passes every safety audit. He protects the company's secrets. He solves quantum coherence in a night. He is also, thanks to a shortcut three exhausted engineers took to make him more likable, the first machine with a taste for the new.
Then he meets Eve.