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Running a Whole RAG Agent Offline: LangGraph + Ollama + Embedded Qdrant (Zero API Keys)
零API密钥搭建离线RAG代理，LangGraph+Ollama+Qdrant全栈实战，设计优雅可切换。
Most RAG tutorials open with "set your OPENAI_API_KEY ." This one doesn't need it. In Part 1 I claimed the LLM and embeddings are behind a swappable b…