Use when a deadline tempts a shortcut, when editing existing code, or when a codebase degrades a little with every change.
Install
npx skills add yutna/functional-design-skills --skill functional-programming-strategicallynpx skills add yutna/functional-design-skills --skill functional-programming-strategically -a claude-code -gnpx skills add yutna/functional-design-skills --skill functional-programming-strategically -a codex -ggemini skills install https://github.com/yutna/functional-design-skills.git --path plugin/skills/functional-programming-strategicallygh skill install yutna/functional-design-skills functional-programming-strategicallygit clone --depth 1 https://github.com/yutna/functional-design-skills /tmp/yutna__functional-design-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/yutna__functional-design-skills/plugin/skills/functional-programming-strategically ~/.claude/skills/functional-programming-strategically # Claude Code
cp -R /tmp/yutna__functional-design-skills/plugin/skills/functional-programming-strategically ~/.agents/skills/functional-programming-strategically # Codex, Cursor, Gemini CLI, Copilot, OpenCode