Claude Code is often misunderstood as simply a text user interface (TUI), but it's more accurate to think of it as a small game engine. Chris Lloyd from the Claude Code team at Anthropic explains that the system operates with a tight frame budget of about 16 milliseconds. To meet this deadline, the pipeline creates a scene graph using React for each frame and goes through several steps to render it. First, it lays out the elements and then rasterizes them to a 2D screen. After that, it compares the new screen with the previous one to identify differences. Finally, these differences are used to generate ANSI sequences for display. The entire process requires efficiency and speed, with roughly 5 milliseconds allocated to convert the React scene graph into the ANSI output. This technical approach highlights the complexity behind what may seem like a straightforward interface.