Yes, and it is where most of the time savings are. I gave the agent the ability to see what it had built, on different screen sizes, using headless browsers and local computer vision models, and to test automatically for alignment, overflow, legibility and consistency. Automating that checking loop removed about 80 percent of the friction in my development work. The lesson generalises: do not wait for a mythical frictionless future, automate your own bottleneck now.