I Told a Robot to "Clean the Kitchen", and It Actually Did

I typed "Clean the kitchen" into a chat box. A robot turned toward the right room, drove over, swept the floor in a tidy back-and-forth pattern, and came back home, while describing what it was doing the whole way. No buttons, no coordinates, no code to write each time. Just a sentence. I built this over the last few weeks. It's called NavMind, and it's the first project I'm writing up as I learn robotics in public. Here's what it does, the one idea that makes it work, and the things that brok...