langgraph-workflow — Stateful Multi-Agent Graph Design

LangGraph is the industry-standard framework for production multi-agent workflows. Build StateGraph-based pipelines with checkpointing, conditional edges, HITL gates, and parallel execution.

When to use this skill

• Building a multi-step AI pipeline where intermediate state must persist between nodes
• Implementing retry/loop logic (e.g., Editor re-routes to upstream node on low quality)
• Adding Human-in-the-Loop approval gates before destructive operations
• Running nodes in parallel to reduce latency
• Recovering from partial failures via checkpoint resume
• Integrating LangSmith tracing for observability (@traceable)

Core Concepts

StateGraph and State Schema