factcheck

Extract factual claims from drafts and verify them against web sources.

35|12|Updated May 2, 2026
One-click install
npx skills add https://github.com/analystacademy/claude-skills --skill factcheck-analystacademy
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: factcheck
Source: https://github.com/analystacademy/claude-skills/tree/main/factcheck
Command: npx skills add https://github.com/analystacademy/claude-skills --skill factcheck-analystacademy

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps you quickly determine whether written content is accurate, misleading, incomplete, or unsupported before you share it publicly.

Core Features & Use Cases

  • Claim Extraction: Identifies factual statements that can be checked, such as statistics, dates, quotes, attributions, and product or company claims.
  • Source-Based Verification: Checks claims against reliable web sources and returns a clear verdict for each one.
  • Actionable Review Output: Produces a claim-by-claim report with sources, suggested corrections, and an overall publishability rating.
  • Use Case: If you drafted a LinkedIn post, newsletter, or client email and want to avoid factual mistakes, this Skill reviews the content and flags anything that needs correction.

Quick Start

Fact-check the pasted draft and return a claim-by-claim report with sources, verdicts, and suggested fixes.

Frequently Asked Questions about factcheck

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

FAQPage Schema
How do I fact-check claims in a LinkedIn post or newsletter before publishing?

To fact-check claims in a LinkedIn post or newsletter, paste the draft content for claim extraction and web-based source verification. The review returns a claim-by-claim report with sources, verdicts, suggested corrections, and an overall publishability rating.

How do I verify statistics and quotations in written drafts?

Verify statistics and quotations by submitting the draft for source-based checking. The process extracts factual statements like dates, attributions, and product claims, then checks each against reliable web sources to return accurate, inaccurate, partial, or unverified verdicts.

Can I fact-check product and company statements for client emails?

You can fact-check product and company statements in client emails by running the draft through claim extraction and web-based verification. The tool assesses whether these specific claims are accurate, inaccurate, partial, or unverified before you send them.

What is the best way to get a publishability assessment for written content?

The best way to get a publishability assessment is to process the written draft through tiered review depth and source checking. This yields cited evidence, clear verdicts for each extracted claim, and an overall rating indicating if the content is safe to publish.

Does fact-checking written content identify unsupported claims?

Fact-checking written content identifies unsupported claims by extracting factual statements and checking them against reliable web sources. The report flags any statistic, quote, or attribution as unverified if no supporting evidence is found.

Are there limitations to web-based source verification for scripts and drafts?

Web-based source verification for scripts and drafts relies on available online sources, meaning claims behind paywalls or in unpublished data may return an unverified verdict. The tiered review depth assesses each extracted statement based on accessible web evidence.