FREE ebook: Building, Testing, and Operating LLM Guardrails in Production

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A ten-layer defense model on FastAPI, LangGraph, Ollama & pgvector — input & output guards, tool gates with HITL, retrieval screening, budgets, audit, and versioned policy packs.

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Companion code: https://github.com/lamhotsiagian/guardrail-system-rag

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