Agent Skills package current, sourced rules so an AI coding agent can apply them directly instead of relying on what it picked up during training. A skill here is an Agent Skill folder packaged as a portable Agent Plugin, so it installs through a plugin marketplace or as a plain folder copy – in Claude Code, Codex or Cursor.
They are written for agents, not for people: you don’t read a skill; you give it to your agent.
SEO and GEO rules for search engines and AI answer engines, built only from official vendor documentation, with an audit procedure and a list of debunked SEO folklore.