LangChain Hub
LangChain Hub prompts sharing LangSmith.
Definition
LangSmith Prompts Hub (smith.langchain.com/hub) catalogs 1000+ public prompts + reusable chains. Pull / push with versioning. LangChain framework supports 600+ integrations (LLM providers, vector DBs, embedding models, document loaders, tools). LangGraph (2024) state machine orchestration. LangSmith for observability traces, evaluations, datasets.
Origin
LangChain Inc., framework launched October 2022 by Harrison Chase, Series A $25M April 2023 Sequoia, Series B 2024.
Usage
Dominant framework for LLM applications + agents in Python / JS. Competes with LlamaIndex (data-centric), Semantic Kernel (Microsoft).