@langchain/core

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@langchain/core contains the core abstractions and schemas of LangChain.js, including base classes for language models, chat models, vectorstores, retrievers, and runnables.

@langchain/core contains the base abstractions that power the rest of the LangChain ecosystem. These abstractions are designed to be as modular and simple as possible. Examples of these abstractions include those for language models, document loaders, embedding models, vectorstores, retrievers, and more. The benefit of having these abstractions is that any provider can implement the required interface and then easily be used in the rest of the LangChain ecosystem.

For example, you can install other provider-specific…

Excerpted from www.npmjs.com/package/@langchain/core