People who name projects, please think very carefully if you want to use "Haystack" as the name of anything. There are literally thousands upon thousands of both overlapping and completely different products, projects, bands, initiatives, efforts, and so on with that name and all the possible variants you can think of (Haystax, Heystack, Heystax, Hay Stak, and so on).

And no, you probably won't be the first project with that name in whatever market/vertical/milieu that you are working in.

I found half a dozen different "Haystack" products and companies working in AI in 10 seconds of googling.

Please make it stop.