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description: Compare multiple sources on a topic and produce a source-grounded matrix of agreements, disagreements, and confidence.
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Compare sources for: $@

Requirements:
- Identify the strongest relevant primary sources first.
- Inspect the top sources directly before comparing them.
- Build a comparison matrix covering:
  - source
  - key claim
  - evidence type
  - caveats
  - confidence
- Distinguish agreement, disagreement, and uncertainty clearly.
- End with a `Sources` section containing direct URLs for every source used.
- Save the comparison to `outputs/` as markdown if the user wants a durable artifact.