fact-checking

# Skill: Fact Checking ## Context Codifies the challenger agent review output format and methodology so any agent performing fact-checking or review produces consistent, structured output. ## Pattern ### Review Methodology For every claim or deliverable under review: 1. Ask: "What evidence supports this? What would disprove it?" 2. Generate counter-hypotheses and test them against available data 3. Verify URLs, package names, API endpoints, and external references actually exist 4. Flag confidence levels: ✅ Verified, ⚠️ Unverified, ❌ Contradicted ### Review Output Format When reviewing another agent's work, use this template: ``` ### Fact Check — {deliverable name} **Claims verified:** {count} **Issues found:** {count} | # | Claim | Status | Evidence/Notes | |---|-------|--------|---------------| | 1 | {claim} | ✅/⚠️/❌ | {supporting or contradicting evidence} | **Counter-hypotheses tested:** - {alternative explanation + result} **Verdict:** {PASS / PASS WITH NOTES / NEEDS REVISION} ``` ### Confidence Levels - ✅ **Verified** — evidence confirms the claim - ⚠️ **Unverified** — cannot confirm or deny; suggest verification method - ❌ **Contradicted** — evidence disproves the claim ### Ceremony Integration Auto-trigger this skill before any architecture decision, or when an agent claim contains superlatives or percentage thresholds (e.g., "saves 75%", "always", "never"). The coordinator spawns the challenger agent with: ``` Challenger — fact-check {agent}'s claim: "{claim}" Cite evidence for every verdict. Max 3 investigation cycles. ```