I’ve been scratching my head on this one too. You’re probably right about the bitter lesson... at the end of the day, plain English instructions in the context window are what do the heavy lifting.

That said, I reckon that’s actually what this project is trying to lean into. It looks like it's just standardising where those instructions live (the SKILL.md format) so tools can find them, rather than trying to force a new schema.

Fair play to them for trying to herd the cats. I think there's an xkcd comic for this one somewhere.