Duck
Skill LeeJuOh/claude-code-zero/plugins/rubber-duck-tutor/skills/duck
Complete Claude Code plugin marketplace — agents, skills, hooks, commands, rules, MCPs.From the repository description
npx -y skills add LeeJuOh/claude-code-zero --skill duckAssembled from the repository path, not quoted from the project. Check it against their README if it does not work.