Breaking Down LangChain 1.0 Core Concepts: From Chained Connections to the Agent Runtime
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The article outlines the technology stack layering after LangChain 1.0 and LangGraph 1.0 reached GA simultaneously, explaining that create_agent replaces create_react_agent and runs on top of the LangGraph runtime. It breaks down six core concepts including the unified model interface, tools, memory, and middleware, gives the selection boundaries between LangChain and LangGraph, and includes a runnable minimal Agent example based on the DeepSeek model.
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The original article breaks down LangChain 1.0's layering, Agent loop, and middleware mechanisms, and provides a runnable minimal example to help assess selection boundaries.
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