this is kind of a weird position to take. you're the captain, you're the person reviewing the code the LLM (agent or not) generates, you're the one asking for the code you want, you're in charge of deciding how much effort to put in to things, and especially which things are most worth your effort.

all this agent stuff sounded stupid to me until I tried it out in the last few weeks, and personally, it's been great - I give a not-that-detailed explanation for what I want, point it at the existing code and get back a patch to review once I'm done making my coffee. sometimes it's fine to just apply, sometimes I don't like a variable name or whatever, sometimes it doesn't fit in with the other stuff so I get it to try again, sometimes (<< 10% of the time) it's crap. the experience is pretty much like being a senior dev with a bunch of very eager juniors who read very fast.

anyway, obviously do whatever you want, but deriding something you've not looked in to isn't a hugely thoughtful process for adapting to a changing world.