Architect a LangGraph agent as an explicit typed state graph with nodes, conditional edges, checkpointing, and human-in-the-loop interrupts — the modern replacement for opaque AgentExecutor chains.
## CONTEXT LangGraph has become the de-facto standard for serious LangChain-based agents in 2026 because it replaces the opaque, hard-to-debug AgentExecutor with an explicit, inspectable state graph. Teams that struggled with runaway chains in 2023 now model their agents as typed graphs: nodes are units of work,…
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