Tried this on chat.deepseek.com, it seems to be able to do it.

Does it compile? Put the full chat in Pastebin and let’s check it out!

I haven’t used their official chat interface or API for privacy reasons.

Thanks for adding detail! My prompts have been very in-the-bubble-of-Qt I'd say, less so about mashing together Qt and something else, which I agree is a good real-world test case.

I haven’t had the chance to try it out with R1 yet but if you implement a debugger class that screenshots the widget/QML element, dumps its metadata like GammaRay, and includes the source, you can feed that context into Sonnet and o1. They are scarily good at identifying bugs and making modifications if you include all that context (although you have to be selective with what metadata you include. I usually just dump a few things like properties, bindings, signals, etc).

Some have said (for what little that's worth) that Kagi's version is not the real thing, but one of the distillations.