KMKaushik Mindocguard-sentinel.hashnode.dev·6h ago · 2 min readYour PDF Is Lying to Your AI — Here's How DocGuard: Sentinel Catches ItThe Problem: Every day, people paste PDFs, resumes, and reports into AI chatbots and RAG pipelines without a second thought. But a PDF isn't just text on a page, it can carry hidden instructions invis00