[mikewarot]

This is close to the functionality that Borland Delphi had back in the 1990s. The pascal language and the design of their GUI toolkit were a really good impedance match, so you could freely switch between GUI design and editing the text version of it.

Doing so for languages like C++, was a sea of boilerplate that you couldn't touch, which is why I never moved away from Pascal. Similar fragility was evident in WxPython and it's builder.

I'm glad to see that LLMs can provide a match for less well suited Language/GUI pairs. We all deserve to get that kind of productivity.

[lmz]

Delphi's form files weren't pascal. The gui-sync was in my memory just editing the class definition when adding components / event handlers.

[RossBencina]

Borland C++ Builder did the same thing as Delphi, used the Delphi VCL class library, worked great.