Build a throwaway prototype to flush out a design before committing to it. Routes between two branches â a runnable terminal app for state/business-logic questions, or several radically different UI variations toggleable from one route.
Install
npx skills add mattpocock/skills --skill prototypenpx skills add mattpocock/skills --skill prototype -a claude-code -gnpx skills add mattpocock/skills --skill prototype -a codex -ggemini skills install https://github.com/mattpocock/skills.git --path skills/engineering/prototypegh skill install mattpocock/skills prototypegit clone --depth 1 https://github.com/mattpocock/skills /tmp/mattpocock__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/mattpocock__skills/skills/engineering/prototype ~/.claude/skills/prototype # Claude Code
cp -R /tmp/mattpocock__skills/skills/engineering/prototype ~/.agents/skills/prototype # Codex, Cursor, Gemini CLI, Copilot, OpenCode