I can't agree here. https://pelorus-nav.com/ (one of my side projects) is 95-98% written by Claude Opus 4.6, all in very nice typescript which I carefully review and correct, and use good prompting and context hygiene to ensure it doesn't take shortcuts. It's taken a month or so but so worth it. And my packing list app packzen.org is also pretty decent typescript all through.
So you do agree? If you are having to review and correct then it's not really the LLM writing it anymore. I have little doubt that you can write good Typescript, but that's not what I said. I said LLMs cannot write good Typescript and it seems you agree given your purported actions towards it. Which is quite unlike some other languages where LLMs write good code all the time — no hand holding necessary.
I find correction is rarely necessary with Opus 4.6. Definitely not so much that "it's not really the LLM writing it anymore." More like it's the author and I'm the editor (in this limited case -- of course architecturally the ideas are all mine.)
But I totally respect that my prompt style, the type of app I'm writing, and other factors could be influencing my success vs. others' lack of success.
> of course architecturally the ideas are all mine.
What else would you need to correct? I've never had trouble with LLMs generating basic syntax in any language. Architecture is exactly the aspect of language where LLMs seem to like to go to crazytown when in Typescript. It seems you've noticed too if the ideas in that area have had to come all from you.