LangChain AI Application Platform

A production multi-tenant platform built on LangChain's full stack — LCEL pipelines, ConversationalRetrievalChain, custom tool-calling agents (AgentExecutor), memory backends (ConversationSummaryBufferMemory), and structured output parsers. Integrates LangSmith for tracing and eval, LangServe for one-command API deployment, and LangGraph for stateful multi-step agent workflows. Supports hot-swappable LLM providers, retrieval over 50M+ documents, and per-user session persistence.