整理文件路径：Technical→AI/

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--- a/wiki/entities/LangChain.md
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+---
+id: langchain
+title: "LangChain"
+type: entity
+tags: [LLM, framework, RAG]
+sources:
+  - "[[RAG从入门到精通系列1：基础RAG]]"
+last_updated: 2025-12-18
+---
+
+## Overview
+
+LangChain是RAG实现框架，用于构建基于LLM的应用。
+
+## Key Features
+
+- RAG流程封装
+- 多种数据源连接
+- Chain构建能力
+- Agent支持
+
+## Connections
+- [[RAG]] ← uses ← [[LangChain]]
+- [[LLM应用开发]] ← uses ← [[LangChain]]