The growing document

Earlier, the chat app placed Tom’s message inside a request. We pictured that request as a digital document.

The app keeps its own copy of the conversation. After each turn, it writes down both sides:

User: Hello, I’m Tom.

Assistant: Hi Tom. I’m Rufus.

When Tom asks another question, the app adds it to the document:

User: What is my name?

Then it sends the growing document to Rufus again.