langgraph-fundamentals

| Need fine-grained control over agent orchestration | Quick prototyping → LangChain agents | | Building complex workflows with branching/loops | Simple stateless workflows → LangChain direct | | Require human-in-the-loop, persistence | Batteries-included features → Deep Agents |

| Overwrite value | No reducer (default) | Simple fields like counters | | Append to list | Reducer (operator.add / concat) | Message history, logs | | Custom logic | Custom reducer function | Complex merging |

Define state schema with reducers for accumulating lists and summing integers.

استخدم هذه المهارة عند كتابة أي رمز LangGraph. يغطي StateGraph ومخططات الحالة والعقد والحواف والأوامر والإرسال والاستدعاء والتدفق ومعالجة الأخطاء. المصدر: langchain-ai/langchain-skills.