I think this is why I've been feeling less productive overall lately. Partly due to the fact that more code is expected to be produced more quickly, and partly because using an agent or something puts me into the wrong frame of mind where I don't really have the full context of what I've written and why, and the amount of quality work I can produce is necessarily qualified by how much I can reliably review, line-by-line, over whatever period of time.

I've been using them more conservatively, slowing down, and manually writing things more. It's easier when I'm just replicating logic over a bunch of different well-defined properties of a clear type definition or spec, but even then results are a bit questionable sometimes.