How can tools like Harpist automate API documentation and web workflows?

Harpist is an innovative tool that allows users to convert any website into a refined and documented API. It consists of a Chrome extension for recording HTTP Archive (HAR) files and a CLI for refining these files into usable API contracts. This tool leverages AI to enhance the automation of web workflows, making it easier for developers to interact with undocumented APIs. What are your thoughts on using such tools in full stack development? Have you tried automating web workflows, and what challenges did you face?