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+# Tutorial: LangGraph
+
+LangGraph helps you build complex **stateful applications**, like chatbots or agents, using a *graph-based approach*.
+You define your application's logic as a series of steps (**Nodes**) connected by transitions (**Edges**) in a **Graph**.
+The system manages the application's *shared state* using **Channels** and executes the graph step-by-step with its **Pregel engine**, handling things like branching, interruptions, and saving progress (**Checkpointing**).
+
+
+**Source Repository:** [https://github.com/langchain-ai/langgraph/tree/55f922cf2f3e63600ed8f0d0cd1262a75a991fdc/libs/langgraph/langgraph](https://github.com/langchain-ai/langgraph/tree/55f922cf2f3e63600ed8f0d0cd1262a75a991fdc/libs/langgraph/langgraph)
+
+```mermaid
+flowchart TD
+    A0["Pregel Execution Engine"]
+    A1["Graph / StateGraph"]
+    A2["Channels"]
+    A3["Nodes (PregelNode)"]
+    A4["Checkpointer (BaseCheckpointSaver)"]
+    A5["Control Flow Primitives (Branch, Send, Interrupt)"]
+    A0 -- "Executes" --> A1
+    A1 -- "Contains" --> A3
+    A3 -- "Updates State Via" --> A2
+    A0 -- "Manages State Via" --> A2
+    A0 -- "Uses Checkpointer" --> A4
+    A1 -- "Defines Control Flow With" --> A5
+    A5 -- "Directs Execution Of" --> A0
+    A4 -- "Saves State Of" --> A2
+```
+
+## Chapters
+
+1. [Graph / StateGraph](01_graph___stategraph.md)
+2. [Nodes (`PregelNode`)](02_nodes___pregelnode__.md)
+3. [Channels](03_channels.md)
+4. [Control Flow Primitives (`Branch`, `Send`, `Interrupt`)](04_control_flow_primitives___branch____send____interrupt__.md)
+5. [Pregel Execution Engine](05_pregel_execution_engine.md)
+6. [Checkpointer (`BaseCheckpointSaver`)](06_checkpointer___basecheckpointsaver__.md)
+
+
+---
+
+Generated by [AI Codebase Knowledge Builder](https://github.com/The-Pocket/Tutorial-Codebase-Knowledge)