> the moment I'm using these tools I feel great and powerful, writing features in a span of hours that would've taken me weeks to write by hand. But inevitably some time later I will look at the code and notice all the subtle cracks and inconsistencies the tool introduced, and despair a bit at the mess.

Very relatable. I wasted 2 weeks of full time effort earlier this year building a helper library with Sonnet. It was the first (and the last) time I vibe coded something. Once I was satisfied with it, I began using the library and within 2 days I was certain it was all for nothing. I will never get those 2 weeks back, but a lesson has been learnt.