langgraph-fundamentals

Guide building stateful agentic workflows with LangGraph StateGraph, nodes, and edges.

2|Updated Mar 7, 2026
One-click install
npx skills add https://github.com/Lincyaw/AgentM --skill langgraph-fundamentals-lincyaw
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: langgraph-fundamentals
Source: https://github.com/Lincyaw/AgentM/tree/main/.claude/skills/langgraph-fundamentals
Command: npx skills add https://github.com/Lincyaw/AgentM --skill langgraph-fundamentals-lincyaw

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides a comprehensive guide to building and managing complex agentic workflows using LangGraph, enabling fine-grained control over execution flow, state management, and error handling.

Core Features & Use Cases

  • Stateful Graph Construction: Define and compile stateful graphs for complex agentic processes.
  • Node and Edge Management: Implement nodes for discrete tasks and wire them with static or conditional edges.
  • Advanced Routing: Utilize Command for combined state updates and routing, and Send for parallel worker orchestration.
  • Robust Error Handling: Implement strategies for transient, LLM-recoverable, and user-fixable errors.
  • Use Case: Building a multi-step agent that needs to research information, synthesize findings, and then take an action, with robust error recovery at each stage.

Quick Start

Use the langgraph-fundamentals skill to learn how to define a StateGraph with nodes and conditional edges.

Frequently Asked Questions about langgraph-fundamentals

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build stateful agentic workflows with LangGraph?

To build stateful agentic workflows with LangGraph, define a StateGraph containing discrete task nodes and wire them using static or conditional edges. This architecture provides fine-grained control over execution flow and complex agent orchestration.

What is the best way to handle errors during LangGraph graph execution?

Handling errors during LangGraph graph execution involves implementing targeted strategies for transient failures, LLM-recoverable issues, and user-fixable errors. This ensures robust agent recovery and continuous workflow operation across complex multi-step processes.

How do I implement conditional routing for parallel tasks in LangGraph?

Implement conditional routing for parallel tasks in LangGraph by utilizing the Send object for parallel worker orchestration and the Command object for combined state updates and routing. This enables advanced control over complex agent workflows.

Why does my LangGraph agent get stuck in an execution loop?

LangGraph agents often get stuck in execution loops due to improperly configured conditional edges or inadequate state update strategies. Applying specific loop management techniques and refining node function signatures resolves these graph execution issues.

Can I stream outputs and update state dynamically in a LangGraph workflow?

Yes, you can stream outputs and update state dynamically in a LangGraph workflow. The framework supports invoke streaming and specific state update strategies, allowing real-time data processing and adaptive agent orchestration.