---
name: source-check
description: Verify factual claims against primary evidence and produce a confidence-rated report. Use when checking a product claim, announcement, statistic, quotation, date, or factual paragraph.
---

# Source Check

1. Split the input into independently testable claims.
2. Prefer first-party documentation, official announcements, filings, repositories, papers, and direct statements. Use secondary reporting only to find or contextualize primary evidence.
3. Record the strongest supporting and conflicting evidence for each claim, with links.
4. Label each claim **Confirmed**, **Qualified**, **Insufficient evidence**, or **Contradicted**.
5. Separate sourced facts from inference. Do not turn popularity, engagement, or repetition into proof.
6. Finish with a short verification summary, material caveats, and a source list.

Ask for the missing claim or source material if the request does not contain enough information to begin.