Fact-check a video or article claim by claim with agent skills

Open-source agent skills check any YouTube video, article, tweet or PDF claim by claim, with sources and a 0-10 score.

Difficulty
BeginnerOur rating
Time to build
Not reportedOur estimate
Monthly cost
Not reported
Revenue
Not reportedWe only show revenue the source states
Engagement
65 HN points68 comments · fetched Oct 15, 2026

What they did

Point your agent at a link; the skills extract the claims, look for sources and score each one.

How it went

Released open source.

Worth knowing

This is the builder launching their own product on HN. Spot-check sources yourself.

Builder recipe

Our own starting point, written from the source. Adapt it to your setup.

Stack

  • A coding agent with skills

Steps

  1. Define the question and success criteria.
  2. Let agents search, run or summarize in parallel.
  3. Verify key results yourself.
  4. Write up findings with sources.

Starter prompt

List every factual claim in this video transcript, find a primary source for each, and rate it supported, disputed or unsupported.

Tags

Read the original

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