fact-checker

Extract verifiable claims from drafts and check cited URLs for supporting evidence.

12|2|Updated Jan 27, 2026
One-click install
npx skills add https://github.com/jikig-ai/soleur --skill fact-checker-jikig-ai
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: fact-checker
Source: https://github.com/jikig-ai/soleur/tree/main/.openhands/skills/fact-checker
Command: npx skills add https://github.com/jikig-ai/soleur --skill fact-checker-jikig-ai

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Manual verification of factual claims, statistics, and attributed quotes is time-consuming and error-prone, leading to misinformation and credibility loss for content creators and editors. This Skill automates extraction of verifiable assertions and checks each against its cited source so teams can publish with confidence.

Core Features & Use Cases

  • Claim extraction: Identifies hyperlinked assertions, inline statistics, attributed quotes, temporal claims, and comparative statements from drafts.
  • Source verification: Fetches cited URLs, searches page content for exact numbers, quotes, or supporting text, and returns evidence excerpts.
  • Structured output: Produces a Verification Report with PASS/FAIL/UNSOURCED tags and summaries for editorial workflows, marketing copy checks, and research validation.

Quick Start

Verify this draft for all verifiable claims and produce the Verification Report with pass/fail verdicts and brief evidence excerpts for each claim.

Frequently Asked Questions about fact-checker

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I verify factual claims and cited sources in a draft automatically?

To verify factual claims and cited sources, this tool extracts verifiable assertions like statistics and quotes from your draft, fetches the linked URLs, and compares the content to produce a structured pass/fail Verification Report.

What is the best way to check if a linked URL directly supports a statistic in my blog post?

The best way to check if a linked URL supports a statistic is to use source verification, which fetches the cited page, extracts its text, searches for the exact numbers, and returns an evidence excerpt confirming the match.

Can I use automated fact-checking for marketing copy and press releases with hyperlinks?

Yes, you can use automated fact-checking for marketing copy and press releases. It identifies hyperlinked assertions and temporal claims, then validates them against the cited web pages to ensure content accuracy before publishing.

How does citation verification handle claims that are missing a source link?

Citation verification handles unsourced claims by flagging them with an UNSOURCED tag in the Verification Report, allowing editorial teams to identify assertions that lack supporting hyperlinks before publication.

Does claim extraction work on comparative statements and attributed quotes in editorial drafts?

Yes, claim extraction works on comparative statements and attributed quotes in editorial drafts. It isolates these verifiable assertions and checks each against its referenced source to output structured pass or fail verdicts.