Fact Checker

Overview

Fact Checker is a targeted verification workflow for one factual assertion at a time. It exists because agents often produce claims that sound plausible but may be hallucinated, copied from a weak source, contradicted by later data, or stale after new reporting. A normal research pass can gather useful background while still failing to answer the narrow question: is this specific claim supported, contradicted, outdated, or not verifiable from available sources?

Use this skill to turn a claim into structured search queries, collect confirming and contradicting passages from multiple independent sources, assess source independence and recency, then produce a concise verification report with citations and a calibrated verdict.

Quick Start

From this skill directory:

python scripts/verify.py structure --claim "Singapore's GDP grew 4.1% in 2025"

Or use the compatibility shortcut: