LangChain (2)

What LangChain (2) is

LangChain provides abstractions over prompts, model providers, vector stores and tool calling, plus a graph-based runtime for stateful agent workflows.

How it works

Applications define nodes and edges over shared state, with built-in integrations for common providers and stores. A separate tracing product handles observability.

Why it matters

It shortens the path to a working prototype; many teams later replace parts of it with direct provider calls for control.

Common uses

• →RAG prototypes
• →Agent workflows
• →Provider abstraction