Mid last year, I put up a library which enables some new functionality for an ML framework. I had discussions with this developer in the comments at the time. Rather than making PRs or feature requests, he reimplemented it from scratch, and gave it a nearly identical name. Let's say mine was called "Foo" and his was named "Fooo".
I didn't think that much of it at the time, but now he's on Twitter promoting it, without any mention of my work. I'd understand it more if he was changing the API significantly, but currently they're nearly identical.
The bottom of the README on his says "inspired by <my repo>", but that is quite the understatement. Is the only thing to do just ignore it and keep working on my version? I don't have a ton of open source experience, so I could use some advice on navigating this.