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Command

/fact-check

Fact-check claims or verify information

BOOST
From plugin
claude-agent-sdk-demos
2.8k5 skills1 agent5 commands
Install
$ npx -y skills add anthropics/claude-agent-sdk-demos --agent claude-code

How it fires

How this command gets triggered: by you, by Claude, or both.

  • Fires itselfClaude auto-loads it when your prompt matches the work.
  • You can call itInvoke it directly when you want it.
  • Slash command/fact-check

Context preview

What this command does when you run it.

Fact-check claims or verify information

Command definition

fact-check.md
description: Fact-check claims or verify information
argument-hint: "<claim or statement to verify>"

Fact-check the following claim: $ARGUMENTS

Verification Process

1. Claim Decomposition

  • Break the claim into verifiable components
  • Identify key facts that need checking
  • Note any ambiguities in the claim

2. Source Search

For each factual component:

  • Find primary sources (official data, academic papers)
  • Find secondary sources (reputable journalism)
  • Look for counter-evidence

3. Verification Assessment

For each component, determine:

  • **TRUE**: Strong evidence supports this
  • **FALSE**: Strong evidence contradicts this
  • **PARTIALLY TRUE**: Some aspects correct, others not
  • **UNVERIFIABLE**: Cannot confirm with available sources
  • **MISLEADING**: Technically true but lacks context

4. Context Analysis

  • Is the claim missing important context?
  • Is it outdated information presented as current?
  • Are there caveats being omitted?

5. Source Quality Evaluation

Rate sources on:

  • Authority (expertise of source)
  • Recency (how current)
  • Objectivity (potential bias)
  • Corroboration (multiple sources agree)

Output Format

FACT CHECK REPORT
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Claim: [Original claim]
Verdict: [TRUE / FALSE / PARTIALLY TRUE / MISLEADING / UNVERIFIABLE]
Confidence: [HIGH / MEDIUM / LOW]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

SUMMARY:
[1-2 sentence summary of finding]

DETAILED ANALYSIS:
[Component-by-component breakdown]

KEY SOURCES:
[List of primary sources used]

IMPORTANT CONTEXT:
[Any context needed to fully understand]
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Be rigorous and objective. Acknowledge uncertainty where it exists.

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⚠️ IMPORTANT: These are demo applications by Anthropic. They are intended for local development only and should NOT be deployed to production or used at scale.

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