阶段4(上):LangGraph、Function Calling、MCP(SDK 2.x)、Agent 评测与运维、Agent 设计专题;run_examples 设置 RUN_EXAMPLES=1
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@@ -4,12 +4,41 @@ title: LangGraph
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type: index
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domain: ai
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stack: [langgraph]
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tags: []
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tags: [LangGraph, 状态图, 检查点, 人机协作]
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week: [11, 12]
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---
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# LangGraph
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状态图、条件路由、检查点续跑、interrupt、长期记忆。
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用有状态的图编排 Agent。岗位要求里的“工作流编排、多 Agent、人工介入、任务状态、异常恢复”基本都落在这里。先在第 10 周手写工具调用循环,再用 LangGraph 重写。
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> 本专题建设中:课程、企业场景、面试题和示例代码会陆续补充。
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## 学习路线
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| 顺序 | 课程 | 级别 | 预计 |
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| --- | --- | --- | --- |
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| 1 | [LangGraph 状态图:状态、节点、边、条件路由和流式输出](01-state-graph.md) | 进阶 | 3 小时 |
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| 2 | [检查点、人机协作和异常恢复:checkpointer、interrupt、RetryPolicy、任务状态](02-persistence-hitl.md) | 高级 | 4 小时 |
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## 企业场景
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- [退款工单 Agent:人工审批、任务状态和崩溃恢复](scenarios/refund-approval.md)
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## 面试题
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- [LangGraph 面试题](interview.md)
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## 示例代码
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- [examples/ticket-flow](examples/ticket-flow/):工单处理图——pydantic 校验结构化输出、`RetryPolicy` 重试、`interrupt` 人工审批、`custom` 流式进度、`SqliteSaver` 崩溃续跑、幂等发送;带 pytest 测试(需要 `langgraph`、`langgraph-checkpoint-sqlite`、`pydantic`)
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## 在 16 周计划中
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- [第 11 周:LangGraph 多 Agent 编排](../../../plan/week11-agent-m2-langgraph.md)、[第 12 周:持久化和人机协作](../../../plan/week12-agent-m3-persistence.md)
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## 官方资料
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LangGraph 更新很快,以官方文档为准:
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- https://docs.langchain.com/oss/python/langgraph/overview
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- 持久化:https://docs.langchain.com/oss/python/langgraph/persistence
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- 人机协作:https://docs.langchain.com/oss/python/langgraph/interrupts
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