That's also what Vercel found:

> In 56% of eval cases, the skill was never invoked. The agent had access to the documentation but didn't use it. Adding the skill produced no improvement over baseline.

> …

> Skills aren't useless. The AGENTS.md approach provides broad, horizontal improvements to how agents work with Next.js across all tasks. Skills work better for vertical, action-specific workflows that users explicitly trigger,

https://vercel.com/blog/agents-md-outperforms-skills-in-our-...