[brudgers]

I'd like to gauge if there's actual interest before publishing something nobody will use

If you don't publish it, it is certain nobody will use it.

If you don't have intrinsic enthusiasm for the library, in the long run, it probably won't matter much how other people feel about it.

Using the heuristic only 1% of public forum users ever comment and the small size of HN userbase, you are unlikely to hear from actual potential users (I am not one).

Finally, building many things is the best route to building something worth building. People who are good at building are good at building because they build things all the time. Because they build all the time, building something that might not work doesn't fall into the waste of time bucket -- for them that bucket is filled with didn't builds. Good luck.