Alexandr Wang, the 28-year-old cofounder of Scale AI and Meta’s chief AI officer, is urging young tech enthusiasts to immerse themselves in “vibe-coding”—hands-on experimentation with AI coding tools.

Sometimes, reading Python code just isn’t enough to see what’s really going on. You can stare at lines for hours and still miss how variables change, or why a bug keeps popping up. That’s where a ...