Guide for creating effective skills. Use when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.
Install
npx skills add NickCrew/Claude-Cortex --skill skill-creatornpx skills add NickCrew/Claude-Cortex --skill skill-creator -a claude-code -gnpx skills add NickCrew/Claude-Cortex --skill skill-creator -a codex -ggemini skills install https://github.com/NickCrew/Claude-Cortex.git --path skills/skill-creatorgh skill install NickCrew/Claude-Cortex skill-creatorgit clone --depth 1 https://github.com/NickCrew/Claude-Cortex /tmp/NickCrew__Claude-Cortex
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/NickCrew__Claude-Cortex/skills/skill-creator ~/.claude/skills/skill-creator # Claude Code
cp -R /tmp/NickCrew__Claude-Cortex/skills/skill-creator ~/.agents/skills/skill-creator # Codex, Cursor, Gemini CLI, Copilot, OpenCode