langgraph

Design LangGraph stateful workflows with TypedDict state and conditional routing.

186|15|Updated Apr 2, 2026
One-click install
npx skills add https://github.com/kid-sid/claude-spellbook --skill langgraph-kid-sid
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: langgraph
Source: https://github.com/kid-sid/claude-spellbook/tree/main/skills/langgraph
Command: npx skills add https://github.com/kid-sid/claude-spellbook --skill langgraph-kid-sid

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

LangGraph patterns enable building stateful multi-step LLM workflows as directed graphs, with persistent state, routing decisions, and human-in-the-loop control.

Core Features & Use Cases

  • StateGraph: define nodes as Python functions, edges for routing, and a TypedDict state with reducers for modular, scalable workflows.
  • Conditional routing, checkpointers, streaming, and subgraphs for coordinating complex, multi-agent tasks.
  • Human-in-the-loop interrupts, error handling, and debugging utilities to coordinate large, long-running processes.

Quick Start

Create a StateGraph, add a few nodes, compile with a checkpointer, and invoke with initial state to run a simple workflow.

Frequently Asked Questions about langgraph

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

FAQPage Schema
What is a StateGraph in multi-step LLM workflows?

A StateGraph defines multi-step LLM workflows as directed graphs using Python functions as nodes, edges for routing, and a TypedDict state with reducers for modular, scalable pipelines.

How do I build a stateful LangGraph workflow with conditional routing?

Create a StateGraph, add Python function nodes, define edges for conditional routing, compile with a checkpointer for persistence, and invoke with initial state to run the workflow.

Can I add human-in-the-loop interrupts to a multi-agent LLM pipeline?

Yes, multi-agent LLM pipelines support human-in-the-loop interrupts, allowing you to pause long-running processes for manual review before resuming execution via checkpointer persistence.

How does subgraph orchestration work for complex multi-agent tasks?

Subgraph orchestration coordinates complex multi-agent tasks by allowing you to define smaller directed graphs as nodes within a larger StateGraph, maintaining shared state with TypedDict reducers.

What's the best way to debug long-running multi-step LLM pipelines?

Debug long-running multi-step LLM pipelines using built-in debugging utilities, checkpointer persistence for state recovery, and streaming to monitor execution flow across graph nodes.