> Every single skill I see just strikes me as a prompt

Both of which are just blocks of text being stomped into an LLM.

I've got a feeling that prompting as we're doing currently (huge blocks of text with very little structure), at least when looking for a deterministic result, will be looked back on as if we were living in the Stone Age. Not sure what the alternative will be, but I'm imagining something like a CI pipeline definition in YAML.