langflow-ai/langflow ? reverse-engineered prompt

I want to build a visual tool for creating AI-powered workflows. It should be a web app with a drag-and-drop interface where users can build their own agents. On one side, there should be a menu of components like different LLMs, vector databases, and other AI tools. I should be able to drag these components onto a main canvas as nodes and then connect them to create a logic flow.

The app should have an interactive chat area so I can immediately test and refine the workflows I build. The goal is to let someone visually create a complex agent and then easily deploy it. It should be possible to export the final workflow as a JSON file or, even better, expose it as a live API endpoint. Please build the backend in Python.