Expert at creating and modifying Claude Code skills. Auto-invokes when the user wants to create, update, modify, enhance, validate, or standardize skills, or when modifying skill YAML frontmatter fields (especially 'allowed-tools', 'description'), needs help designing skill architecture, or wants to understand when to use skills vs agents.
Install
npx skills add aiskillstore/marketplace --skill building-skillsnpx skills add aiskillstore/marketplace --skill building-skills -a claude-code -gnpx skills add aiskillstore/marketplace --skill building-skills -a codex -ggemini skills install https://github.com/aiskillstore/marketplace.git --path skills/c0ntr0lledcha0s/building-skillsgh skill install aiskillstore/marketplace building-skillsgit clone --depth 1 https://github.com/aiskillstore/marketplace /tmp/aiskillstore__marketplace
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/aiskillstore__marketplace/skills/c0ntr0lledcha0s/building-skills ~/.claude/skills/building-skills # Claude Code
cp -R /tmp/aiskillstore__marketplace/skills/c0ntr0lledcha0s/building-skills ~/.agents/skills/building-skills # Codex, Cursor, Gemini CLI, Copilot, OpenCode