Product and UI design — flows, wireframes, HTML mockups, design systems and tokens, UX copy, micro-interactions. Use when creating or changing a design or mockup, before app code. Produces a mockup engineering can be verified against, with tokens, every screen and state, final copy, test IDs and an interaction spec.
Install
npx skills add IfeOlulesi/proof --skill designnpx skills add IfeOlulesi/proof --skill design -a claude-code -gnpx skills add IfeOlulesi/proof --skill design -a codex -ggemini skills install https://github.com/IfeOlulesi/proof.git --path plugins/proof/skills/designgh skill install IfeOlulesi/proof designgit clone --depth 1 https://github.com/IfeOlulesi/proof /tmp/IfeOlulesi__proof
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/IfeOlulesi__proof/plugins/proof/skills/design ~/.claude/skills/design # Claude Code
cp -R /tmp/IfeOlulesi__proof/plugins/proof/skills/design ~/.agents/skills/design # Codex, Cursor, Gemini CLI, Copilot, OpenCode