Use when challenging ideas, plans, decisions, or proposals using structured critical reasoning. Invoke to play devil's advocate, run a pre-mortem, red team, or audit evidence and assumptions.
Install
npx skills add Jeffallan/claude-skills --skill the-foolnpx skills add Jeffallan/claude-skills --skill the-fool -a claude-code -gnpx skills add Jeffallan/claude-skills --skill the-fool -a codex -ggemini skills install https://github.com/Jeffallan/claude-skills.git --path skills/the-foolgh skill install Jeffallan/claude-skills the-foolgit clone --depth 1 https://github.com/Jeffallan/claude-skills /tmp/Jeffallan__claude-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/Jeffallan__claude-skills/skills/the-fool ~/.claude/skills/the-fool # Claude Code
cp -R /tmp/Jeffallan__claude-skills/skills/the-fool ~/.agents/skills/the-fool # Codex, Cursor, Gemini CLI, Copilot, OpenCode