Think like a court jester who speaks truth to power. This reasoning tool helps you challenge any idea or plan. It uses five structured modes to find blind spots and hidden assumptions.
Anyone making decisions can benefit. Leaders, engineers, and planners can stress-test their choices before committing. The skill forces you to see the other side clearly.
You can play devil's advocate, run a pre-mortem, or launch a red team attack. Each mode delivers focused challenges to strengthen your position.
Global
mkdir -p ~/.claude/skills/the-foolProject
mkdir -p .claude/skills/the-foolSource Repository
Grill Memattpocock/skills
Stress-test your plan with relentless questions until we both understand
Tddmattpocock/skills
Write one test at a time then code to make it pass
Test Driven Developmentobra/superpowers
Write a failing test first then code just enough to pass
Webapp Testinganthropics/skills
Test your local web apps quickly with Playwright automation and screenshots
Qamattpocock/skills
Turn bug reports into GitHub issues through natural conversation without technical fuss
Migrate To Shoehornmattpocock/skills
Replace unsafe as assertions with type-safe partial test data easily
Playwright Best Practicescurrents-dev/playwright-best-practices-skill
Master Playwright testing with best practices for reliable and fast tests
Google Agents Cli Evalgoogle/agents-cli
Run evaluations on your AI agent, find failures, and improve its quality step by step