Sorry, I miquoted the company, it was Vercel, not Cursor.
"A compressed 8KB docs index embedded directly in AGENTS.md achieved a 100% pass rate, while skills maxed out at 79% even with explicit instructions telling the agent to use them. Without those instructions, skills performed no better than having no documentation at all."
https://vercel.com/blog/agents-md-outperforms-skills-in-our-...