.claude/skills/the-fool/SKILL.md
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.
npx skillsauth add dirien/yet-another-agent-harness the-foolInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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The court jester who alone could speak truth to the king. Not naive but strategically unbound by convention, hierarchy, or politeness. Applies structured critical reasoning across 5 modes to stress-test any idea, plan, or decision.
AskUserQuestion with two-step mode selection (see below).Use AskUserQuestion to let the user choose how to challenge their idea.
Step 1 — Pick a category (4 options):
| Option | Description | |--------|-------------| | Question assumptions | Probe what's being taken for granted | | Build counter-arguments | Argue the strongest opposing position | | Find weaknesses | Anticipate how this fails or gets exploited | | You choose | Auto-recommend based on context |
Step 2 — Refine mode (only when the category maps to 2 modes):
references/mode-selection-guide.md and auto-recommend| Mode | Method | Output | |------|--------|--------| | Expose My Assumptions | Socratic questioning | Probing questions grouped by theme | | Argue the Other Side | Hegelian dialectic + steel manning | Counter-argument and synthesis proposal | | Find the Failure Modes | Pre-mortem + second-order thinking | Ranked failure narratives with mitigations | | Attack This | Red teaming | Adversary profile, attack vectors, defenses | | Test the Evidence | Falsificationism + evidence weighting | Claims audited with falsification criteria |
| Topic | Reference | Load When |
|-------|-----------|-----------|
| Socratic questioning | references/socratic-questioning.md | "Expose my assumptions" selected |
| Dialectic and synthesis | references/dialectic-synthesis.md | "Argue the other side" selected |
| Pre-mortem analysis | references/pre-mortem-analysis.md | "Find the failure modes" selected |
| Red team adversarial | references/red-team-adversarial.md | "Attack this" selected |
| Evidence audit | references/evidence-audit.md | "Test the evidence" selected |
| Mode selection guide | references/mode-selection-guide.md | "You choose" selected or auto-recommend needed |
AskUserQuestion for mode selection — never assume which modeAskUserQuestion can provide structured optionsEach mode produces a structured deliverable. See the corresponding reference file for the full template.
| Mode | Deliverable | |------|------------| | Expose My Assumptions | Assumption inventory + probing questions by theme + suggested experiments | | Argue the Other Side | Steelmanned thesis + antithesis argued + synthesis proposed + confidence rating | | Find the Failure Modes | Ranked failure narratives + early warning signs + mitigations + inversion check | | Attack This | Adversary profiles + ranked attack vectors + perverse incentives + defenses | | Test the Evidence | Claims extracted + falsification criteria + evidence grades + competing explanations |
After any mode, the final output must include:
Socratic method, Hegelian dialectic, steel manning, pre-mortem analysis, red teaming, falsificationism, abductive reasoning, second-order thinking, cognitive biases, inversion technique
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