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claude-codeverification

Claude-skill-registry fact-check

Verify factual claims against database sources

install
source · Clone the upstream repo
git clone https://github.com/majiayu000/claude-skill-registry
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/fact-check" ~/.claude/skills/majiayu000-claude-skill-registry-fact-check && rm -rf "$T"
manifest: skills/data/fact-check/SKILL.md
source content

Fact-Checking Skill

Verify factual claims in manuscript against ingested sources.

Usage

/fact-check --section section_123
/fact-check --chapter 3
/fact-check --claim "SOE training lasted six weeks"

How It Works

  1. Extract Claims: Identify factual statements
  2. Source Lookup: Find relevant sources in database
  3. Verification: Compare claim to source content
  4. Reliability Check: Assess source quality
  5. Report: Flag unsupported or conflicting claims

Claim Categories

Verifiable

  • Dates and timelines
  • Statistics and numbers
  • Historical events
  • Technical specifications
  • Geographic information
  • Names and titles

Subjective

  • Opinions and interpretations
  • Character motivations (fiction)
  • Artistic choices

Verification Levels

✅ Verified: 2+ high-reliability sources agree ⚠️ Partially Verified: 1 source, or medium reliability ❌ Unverified: No source support ⚡ Conflicting: Sources disagree

Example Report

FACT-CHECK REPORT - Section 3.2

✅ "SOE training center at Beaulieu"
   Sources: [High] SOE Official History
            [High] Beaulieu Archives

⚠️ "Training lasted six weeks"
   Sources: [Medium] Memoir - Agent testimony
   Note: Duration varied by agent specialty

❌ "All agents carried cyanide capsules"
   Sources: None found
   Recommendation: Research or remove/hedge claim

⚡ "Over 400 agents deployed to France"
   Conflicting: [High] Official records say 393
                [Medium] Historian estimates 420+
   Recommendation: Cite range or specific source

Integration

Runs automatically during 

/bookstrap-edit-path
Can be run manually on specific sections