Master Time Travel Debugging in LangGraph.js: Rewind, Edit, and Replay Agent States

Ever built an AI agent that runs off the rails? You watch it hallucinate, get stuck in a loop, or make a tool-call error, and the only solution is to kill the process and start over - wasting time and expensive tokens. In the world of autonomous agents, execution paths are rarely linear. They branch, loop, and evolve based on probabilistic decisions. Traditional step-by-step debuggers often fall short here. What you need is the ability to step back in time, inspect the exact state of the agent's memory, and even edit the past to see how it affects the future.