I had a similar experience trying to get feedback on my attempt to help different role families adopt AI evals as a common language (hands on tutorial or tool comparison).
https://news.ycombinator.com/item?id=47026263
I attribute it mostly to my own inability to pitch something that is aimed for many audiences at once and needs more UX polishing and maybe a bit on timing.
It's tough when you're not looking to sell a product but moreso engage in a community without going the twitter/bluesky route (which I'll bregudgingly may start using).
Maybe evals is a problem that people don't have yet because they can just build their custom thing or maybe it needs a "hey, you're building agent skills, here's the mental model" (e.g. https://alexhans.github.io/posts/series/evals/building-agent... ) and once they get to the evals part, we start to interact.
In any case, I still find quite a lot of cool things in SHOW HN but the volume will definitely be a challenge going forward.