Depending on the framework, I’ve basically found the same as OP. On some tool chains it hallucinates and gives commands / scaffolding that is outdated or wrong. But for popular frameworks like next.js or similar and HTML/CSS it can build out the basics very quickly. I’ve also found it useful for explaining rust idioms in a way that I can understand. There are still issues when you have a long discussion and ask it to tweak something. Not an expert but that might be down to context window size. Sometimes it reverts to an older version of the framework and gives code that I can tell won’t work.