> I still have no idea how to signal to people that I actually know what I’m talking about.

presumably if this is true, it should be obvious by the quality of your product. If it isnt, then maybe you need to need to rethink the value of your artisanal hand written code.

I think that the problem is that LLMs are good at making plausible-looking text and discerning if a random post is good or bad requires effort. And it's really bad when signal-to-noise ratio is low, due to slop being easier to make.