I never allow ai to write code, certainly not unsupervised. I like to write some code and then have claude check my work. Not just for bugs, but for architecture and style as well.

I let it write boilerplate, or other low impact stuff like html/css. It worked nicely converting Svelte components from Svelte 4 to 5 for example. And AI autocomplete has been a genuine productivity win although not without the occasional subtle bug. But I can't imagine trusting it for an entire codebase. If you're letting the AI write your code you're not thinking about it deeply enough to critique it imo. Which is fine for CSS or whatever but not most code.

It's such a great tool for learning, double checking your work, figuring out syntax or console commands, writing one-off bash scripts etc.