langchain_core

Reference documentation for the langchain-core package.

langchain-core contains the core interfaces and abstractions used across the LangChain ecosystem. Most users will primarily interact with the main langchain package, which builds on top of langchain-core and provides implementations for all the core interfaces.

• Caches: Caching mechanisms.
• Callbacks: Callback handlers and management.
• Documents: Document abstractions.
• Embeddings: Embedding abstractions.
• Exceptions: Common LangChain exception types.
• Language models: Base interfaces for language models.
• Serialization: Components for serialization and deserialization.
• Output parsers: Parsing model outputs.
• Prompts: Prompt templates and related utilities.
• Rate limiters: Rate limiting utilities.
• Retrievers: Retriever interfaces and implementations.
• Runnables: Runnables and related abstractions.
• Utilities: Various utility functions and classes.
• Vector stores: Vector store interfaces and implementations.