The closest I get to finding skills useful is when I find myself repeating myself to an LLM. This tends to happen most when I am starting new projects and want to communicate basic design principles and patterns to follow and libraries to use. What I did was to factor and store these "chunks" of instruction in some text files. I then made a little script that can list what chunks are available and when given a subset will essentially `cat` the selected files to emit AGENTS.md content which I save into the new project or append to shore up an existing one.

Your observation on the readership bias of HN is a good one for people to add to their HUMANS.md before reading and commenting. :)