Before you start
Full text, reference date and available sources. Enable web search for external checks; without access, limit the review to supplied documents. Pack in English.
Fact-checking with Claude: build a traceable report →
1. Download the native pack
Keep the complete ZIP without extracting it. If already installed and enabled, skip to step 3.
Download the ZIP pack ↓2. Install and enable in Claude
In Customize > Skills, use + > Create skill > Upload a skill to import the ZIP, then enable it. Check code execution and file creation. Attaching Markdown to a chat does not install a skill.
3. Prepare the inputs
Attach the text and original source. Prioritize numbers, quotations and comparisons. Separate publication dates from event dates.
4. Request the result
Request a verdict for each claim, evidence, available URL and date, suggested correction and an unchecked list. Inaccessible evidence cannot support certainty.
A request to try
Use fact-checker. Fictional document-only check: source “12 participants responded; 8 found the session useful.” Draft “All participants found the session useful.” Compare, distinguish respondents from participants and suggest a correction without inventing external sources.
5. Check the result
- Open sources and locate cited passages.
- Recount claims by verdict.
- Separate false, unverifiable and unchecked.
Files and advanced installation
With Claude Code already installed, run this command in your project terminal, restart Claude Code and invoke the skill with your data.
npx educasium --skill fact-checker --global