AI Agent 框架日益复杂，例如 LangChain 的代码库已有约 40 万行，CrewAI 的依赖项多达 131 个。但这些复杂抽象的背后，核心逻辑其实只要 100 行 Python。近期科学出版社出版的新书《手搓AI智能体：轻量框架，100行搞定》就在讲这件事：作者分析了当前主流的 AI Agent 应用，提出一个核心观点——移除框架的封装，它们的底层逻辑大多能归结为同一种图结构。

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