Thanks for the comment. I am very familiar with Buf+Protobuf, I think it's a great system overall but has many limitations which I think can be overcome by redesigning the language from scratch instead of building on top of the .proto syntax.
In the Skir vs Protobuf part of the blog post [https://medium.com/@gepheum/i-spent-15-years-with-protobuf-t...], only 2 out of 10 pertain to "syntax" (and they're a bit more than syntax). Since you mention compatibility check, Buf's compatibility check prevents message renaming, which is a huge limitation. With Skir, that's not the case. You also get the compatibility checks verified in the IDE.
They are using an LLM. I've seen accounts that are very obviously LLM bots, but have a human in the loop to reply when you accuse them. Then, of course, they go back to posting obvious LLM text.