LangGraph Implementation Core Concepts LangGraph builds stateful, multi-actor agent applications using a graph-based architecture: - StateGraph : Builder class for defining graphs with shared state - Nodes : Functions that read state and return partial updates - Edges : Define execution flow (static or conditional) - Channels : Internal state management (LastValue, BinaryOperatorAggregate) - Checkpointer : Persistence for pause/resume capabilities Implementation gates Use these sequenced checks for persistence and human-in-the-loop flows (avoid “it should work” without evidence): 1. Checkpoin…