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How to check documents for hidden text before your AI agent reads them

If your agent or RAG pipeline reads documents from outside — résumés, contracts, supplier PDFs, email attachments — some of them will contain text a person can't see but your model reads. White text on a white page. A 1pt font. Characters that render as nothing. This isn't hypothetical. A study of…

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  1. 2026-11-12 07:23 · DEV Community — AI
    How to check documents for hidden text before your AI agent reads them

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