I receive and AI newsletter each day that has a prompt library idea in one section. I am trying to build an agent that will monitor either the incoming emails or look at a the URL daily to scrape that section of text and append it to an existing document so that I can build a document of prompt ideas. However, when I build the agent to find the content it does fine, but it wants to create a new document, rather than find an existing one and append the information to the end of the file. Has anyone had any success trying this? I don't even see an option to edit a file, only create.