Custom authentication flows and component appearance - hooks (useSignIn, useSignUp), themes, colors, fonts, CSS. Use for custom sign-in/sign-up flows, appearance styling, visual customization, branding.
Install
npx skills add clerk/skills --skill clerk-custom-uinpx skills add clerk/skills --skill clerk-custom-ui -a claude-code -gnpx skills add clerk/skills --skill clerk-custom-ui -a codex -ggemini skills install https://github.com/clerk/skills.git --path skills/clerk-custom-uigh skill install clerk/skills clerk-custom-uigit clone --depth 1 https://github.com/clerk/skills /tmp/clerk__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/clerk__skills/skills/clerk-custom-ui ~/.claude/skills/clerk-custom-ui # Claude Code
cp -R /tmp/clerk__skills/skills/clerk-custom-ui ~/.agents/skills/clerk-custom-ui # Codex, Cursor, Gemini CLI, Copilot, OpenCode