source-check the model finds claims. the source decides truth.

Paste a source document and a draft. Every checkable claim in the draft comes back marked Supported, Not in source, Contradicted, or Recomputed — plus a permanent, shareable receipt of the run.

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For now this checks short drafts best: about 150 words of fact-heavy copy. A longer draft may stop partway, and the receipt will say so.

Your source and draft are stored so the receipt can be produced, then deleted after 7 days. The short quoted passages shown on the receipt are kept, so the permanent link keeps working.