LangChainAI Coding ToolsLangChain is an open-source AI application development framework for developers. It does not provide large language models itself; instead, it uses component-based interfaces to connect models with external data, APIs, and databases. Developers can combine chains, retrieval-augmented generation (RAG), and agent capabilities to build knowledge-base question answering, intelligent customer service, coding assistants, and other applications that need to perform multi-step tasks. Together with LangSmith, it can also be used to trace, debug, and evaluate application workflows. It is suitable for AI application developers, enterprise technology leaders, and researchers. Note that LangChain is a development framework rather than a ready-to-use end-user product, so real-world projects still require code development, model configuration, and integration with business systems.027.5All tools with this tag are shown.