https://github.com/williamcotton/webpipe
https://github.com/williamcotton/webpipe-lsp
(lots of animated GIFs to show off the LSP and debugger!)
While I barely typed any of this myself I sure as heck read most of the generated code. But not all of it!
Of course you have to consider my blog to be "in production":
https://github.com/williamcotton/williamcotton.com/blob/main...
The reason I'm mentioning this project is because the article questions where all the AI apps are. Take a look at the git history of these projects and question if this would have been possible to accomplish in such a relatively short timeframe! Or maybe it's totally doable? I'm not sure. I knew nothing about quite a bit of the subsystems, eg, the Debug Adapter Protocol, before their implementation.