AI Field Notes #001 | Is AI frontend development finally getting good? Our Opus 4.6 test says yes. (And no.)

In December 2025, I wrote about trying to build a full page with AI with a much smaller scope, and it didn’t go well. At that time, my conclusion was that while implementing a simple, small UI component with AI and Figma MCP worked quite well, it was surprising how badly it handled the implementation of a full page. The small UI component generation wasn't perfect either. I could get a ~90% "close enough" output that I could quickly align to the requirements by hand. But when I asked AI to implement a simple login page that contained only already-existing components, even with Figma MCP, the result was disappointing. The layout was far from the design, and it hallucinated elements that weren't in the design at all. No matter how I prompted, it just produced different hallucinations. Which I really don't understand, because Figma MCP provides a structured description of the design. In the end, I spent much more time experimenting with AI than it would have taken to puzzle the components