Earlier quoted context omitted.
Anthropic acquired Bun. Clearly, Bun is not a runtime for C++, Rust, or Python. For an engineering project, strongly typed TypeScript was basically the only possible choice for them.
I am not following your logic. Anthropic acquired Bun and so all of their end-user software should use it? Or am I missing sarcasm?
Also you needed a leak to know that CC, that is out for 1 year, is in TS?