LangGraph 0.4 Agent Memory 2026: Checkpointers, Stores & Recall
LangGraph agent memory in 0.4: how checkpointers, stores, and recall patterns fix agents that forget users, context, and their own answers mid-conversation.
Chapter 1: Why Agent Memory Broke Your LangGraph App (And What Changed in 0.4) You built an agent. It worked in the demo. Then a user asked a follow-up question and the agent had no idea who they were, what they'd asked thirty seconds ago, or why it had just contradicted itself. Welcome to the memory problem — the single most common reason LangGraph apps look brilliant in a notebook and fall apart in production. This chapter is the diagnosis. We're going to be precise about what broke, because "the agent forgot" is three or four distinct failures wearing a...