Whether it was deliberate or not, I do not think it's a good choice. When agents can write in any language, there's no reason to pick the wrong tool for the job. At this point Javascript/Typescript belongs only in the browser. It's the suboptimal choice for every other environment. Especially for a command line tool. Even if the back-end is written in Typescript (also not the best choice imho), the clients need not be in the same language.

Code should be written for the user.