
What It Is: LangChain is an open-source framework for building Large Language Model (LLM) applications. It provides developers with a structured toolset to connect LLMs with external data sources and tools, thereby creating more powerful and context-aware AI agents.
How to Use It: Developers use LangChain’s modules to build “chains,” which link different functionalities (e.g., searching, calculating, database querying) together, allowing the LLM to perform multi-step tasks.
Application Scenarios: Building smart search engines, document Q&A systems, data analysis agents, and complex automated workflows.
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