claude_skills
npx skills add anthropics/claude-plugins-official --skill skill-creator
https://github.com/anthropics/skills https://github.com/anthropics/skills/blob/main/skills/skill-creator/SKILL.md
/plugin marketplace add anthropics/skills
https://resources.anthropic.com/hubfs/The-Complete-Guide-to-Building-Skill-for-Claude.pdf
https://support.claude.com/en/articles/12512198-how-to-create-custom-skills