How Agents Plan Tasks with To-Do Lists

LLM agents can use to-do lists to effectively plan and track complex tasks, which is especially useful for multi-tool coordination and long-running operations. This process involves breaking down a complex request into an initial set of steps, organizing them with dependencies, and updating the plan as tasks are completed. The article demonstrates this concept using a travel planning agent built with LangChain, which plans an itinerary by creating tasks for booking flights, hotels, and insurance. This functionality is enabled by LangChain's `TodoListMiddleware`, which injects custom code to manage the to-do list by adding a specific tool and updating the agent's system prompt.