langgraph-interrupt-workflow-template
langgraph-interrupt-workflow-template is a production-ready developer kit for building human-in-the-loop AI workflows using LangGraph v1. It combines a FastAPI backend with a Next.js 15 frontend to enable real-time collaboration between AI agents and human operators. The system supports pausing agent execution at strategic points to allow users to approve, edit, redirect, or reject actions before resuming exactly where the workflow left off. It offers three distinct implementation patterns: a custom multi-step interrupt graph for complex decision chains, a draft-then-review approval flow, and a middleware-based approach for tool-using agents. Key capabilities include parallel research execution with live progress streaming, persistent long-term memory across sessions using LangGraph Store, and time-travel features to rewind to previous checkpoints and fork new execution paths. The template is provider-agnostic, supporting major LLM providers like OpenAI, Anthropic, Google, and Ollama without requiring initial