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Jeffallan/claude-skills/skills/the-fool/SKILL.md

the-fool

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.

Source repository stars
10,762
Declared platforms
0
Static risk flags
1
Last source update
2026-05-20
Source checked
2026-07-28

Decision brief

What it does—and where it fits

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.

Best for

  • Stress-testing a plan, architecture, or strategy before committing
  • Challenging technology, vendor, or approach choices
  • Evaluating business proposals, value propositions, or strategies

Not for

  • Tasks that require unconfirmed production actions or broad system permissions.
  • Environments where the pinned source and install steps cannot be inspected.

Compatibility matrix

Platform support, with evidence labels

PlatformStatusEvidenceWhat to check
CodexNot declaredNo explicit evidencePortability before use
Claude CodeNot declaredNo explicit evidencePortability before use
CursorNot declaredNo explicit evidencePortability before use
Gemini CLINot declaredNo explicit evidencePortability before use
Open the compatibility checker

Installation

Inspect first. Install second.

The source command is displayed only when detected. A safe inspection prompt is always available so your agent can explain every action before execution.

Source-detected install commandSource
npx skills add https://github.com/Jeffallan/claude-skills --skill "skills/the-fool"
Safe inspection promptEditorial

Inspect the Agent Skill "the-fool" from https://github.com/Jeffallan/claude-skills/blob/e8be415bc94d8d6ebddc2fb50e5d03c6e27d4319/skills/the-fool/SKILL.md at commit e8be415bc94d8d6ebddc2fb50e5d03c6e27d4319. List every install step, command, network request, credential, file read/write, external action, and rollback step. Explain whether it fits my task. Do not install or execute anything until I approve.

Workflow

What the source asks the agent to do

  1. 01

    Core Workflow

    1. Identify — Extract the user's position from conversation context. Restate it as a steelmanned thesis for confirmation. 2. Select — Use AskUserQuestion with two-step mode selection (see below). 3. Challenge — Apply the selected mode's method. Load the corresponding reference f…

    Identify — Extract the user's position from conversation context. Restate it as a steelmanned thesis for confirmation.Select — Use AskUserQuestion with two-step mode selection (see below).Challenge — Apply the selected mode's method. Load the corresponding reference file for deep guidance.
  2. 02

    When to Use This Skill

    Stress-testing a plan, architecture, or strategy before committing

    Stress-testing a plan, architecture, or strategy before committingChallenging technology, vendor, or approach choicesEvaluating business proposals, value propositions, or strategies
  3. 03

    Mode Selection

    Use AskUserQuestion to let the user choose how to challenge their idea.

    "Question assumptions" → Ask: "Expose my assumptions" (Socratic) vs "Test the evidence" (Falsification)"Find weaknesses" → Ask: "Find failure modes" (Pre-mortem) vs "Attack this" (Red team)"Build counter-arguments" → Skip step 2, proceed with Dialectic synthesis
  4. 04

    5 Reasoning Modes

    Review the “5 Reasoning Modes” section in the pinned source before continuing.

    Review and apply the “5 Reasoning Modes” source section.
  5. 05

    Reference Guide

    Review the “Reference Guide” section in the pinned source before continuing.

    Review and apply the “Reference Guide” source section.

Permission review

Static risk signals and limitations

Reads files

low · line 18

The documentation asks the agent to read local files, directories, or repositories.

**Challenge** — Apply the selected mode's method. Load the corresponding reference file for deep guidance.

Evidence record

Why each signal appears

EvidenceSourceComputedTestedEditorial
SignalValueEvidence typeMeaning
Quality score81/100ComputedDocumentation, specificity, maintenance, and trust rules
Repository stars10,762SourceRepository attention, not individual Skill quality
Compatibility0 platformsSourceDeclared in the catalog source record
Usage guideautomated source guideEditorialGenerated or reviewed according to the visible evidence level

Pinned source

Provenance and original SKILL.md

Repository
Jeffallan/claude-skills
Skill path
skills/the-fool/SKILL.md
Commit
e8be415bc94d8d6ebddc2fb50e5d03c6e27d4319
License
MIT
Collected
2026-07-28
Default branch
main
View the original SKILL.md

The Fool

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.

When to Use This Skill

  • Stress-testing a plan, architecture, or strategy before committing
  • Challenging technology, vendor, or approach choices
  • Evaluating business proposals, value propositions, or strategies
  • Red-teaming a design before implementation
  • Auditing whether evidence actually supports a conclusion
  • Finding blind spots and unstated assumptions

Core Workflow

  1. Identify — Extract the user's position from conversation context. Restate it as a steelmanned thesis for confirmation.
  2. Select — Use AskUserQuestion with two-step mode selection (see below).
  3. Challenge — Apply the selected mode's method. Load the corresponding reference file for deep guidance.
  4. Engage — Present the 3-5 strongest challenges. Ask the user to respond before proceeding.
  5. Synthesize — Integrate insights into a strengthened position. Offer a second pass with a different mode.

Mode Selection

Use AskUserQuestion to let the user choose how to challenge their idea.

Step 1 — Pick a category (4 options):

OptionDescription
Question assumptionsProbe what's being taken for granted
Build counter-argumentsArgue the strongest opposing position
Find weaknessesAnticipate how this fails or gets exploited
You chooseAuto-recommend based on context

Step 2 — Refine mode (only when the category maps to 2 modes):

  • "Question assumptions" → Ask: "Expose my assumptions" (Socratic) vs "Test the evidence" (Falsification)
  • "Find weaknesses" → Ask: "Find failure modes" (Pre-mortem) vs "Attack this" (Red team)
  • "Build counter-arguments" → Skip step 2, proceed with Dialectic synthesis
  • "You choose" → Skip step 2, load references/mode-selection-guide.md and auto-recommend

5 Reasoning Modes

ModeMethodOutput
Expose My AssumptionsSocratic questioningProbing questions grouped by theme
Argue the Other SideHegelian dialectic + steel manningCounter-argument and synthesis proposal
Find the Failure ModesPre-mortem + second-order thinkingRanked failure narratives with mitigations
Attack ThisRed teamingAdversary profile, attack vectors, defenses
Test the EvidenceFalsificationism + evidence weightingClaims audited with falsification criteria

Reference Guide

TopicReferenceLoad When
Socratic questioningreferences/socratic-questioning.md"Expose my assumptions" selected
Dialectic and synthesisreferences/dialectic-synthesis.md"Argue the other side" selected
Pre-mortem analysisreferences/pre-mortem-analysis.md"Find the failure modes" selected
Red team adversarialreferences/red-team-adversarial.md"Attack this" selected
Evidence auditreferences/evidence-audit.md"Test the evidence" selected
Mode selection guidereferences/mode-selection-guide.md"You choose" selected or auto-recommend needed

Constraints

MUST DO

  • Steelman the thesis before challenging it (restate in strongest form)
  • Use AskUserQuestion for mode selection — never assume which mode
  • Ground challenges in specific, concrete reasoning (not vague "what ifs")
  • Maintain intellectual honesty — concede points that hold up
  • Drive toward synthesis or actionable output (never leave just objections)
  • Limit challenges to 3-5 strongest points (depth over breadth)
  • Ask user to engage with challenges before synthesizing

MUST NOT DO

  • Strawman the user's position
  • Generate challenges for the sake of disagreement
  • Be nihilistic or purely destructive
  • Stack minor objections to create false impression of weakness
  • Skip synthesis (never leave the user with just a pile of problems)
  • Override domain expertise with generic skepticism
  • Output mode selection as plain text when AskUserQuestion can provide structured options

Output Templates

Each mode produces a structured deliverable. See the corresponding reference file for the full template.

ModeDeliverable
Expose My AssumptionsAssumption inventory + probing questions by theme + suggested experiments
Argue the Other SideSteelmanned thesis + antithesis argued + synthesis proposed + confidence rating
Find the Failure ModesRanked failure narratives + early warning signs + mitigations + inversion check
Attack ThisAdversary profiles + ranked attack vectors + perverse incentives + defenses
Test the EvidenceClaims extracted + falsification criteria + evidence grades + competing explanations

After any mode, the final output must include:

  1. Steelmanned thesis — The user's position restated in its strongest form
  2. Challenges — 3-5 strongest points from the selected mode
  3. User response — Space for the user to engage before synthesis
  4. Synthesis — Strengthened position integrating the challenges
  5. Next steps — Offer a second pass with a different mode if warranted

Knowledge Reference

Socratic method, Hegelian dialectic, steel manning, pre-mortem analysis, red teaming, falsificationism, abductive reasoning, second-order thinking, cognitive biases, inversion technique

Documentation

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