AI Engineer · AI

Building the Document Context Layer for AI Agents — Jerry Liu, LlamaIndex

A PDF is designed for printing, so its text is glyphs with coordinates and its tables are line segments with characters at cell positions. Reading order for a multicolumn page is not stored anywhere. That, Jerry Liu argues, is why an agent handed a raw file cannot make sense of it, and why document OCR is still unsolved after twenty years. His larger frame is that RAG in 2026 decomposes into an agent harness plus a context layer. Retrieval comple

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