He built Amazon’s robot army. Then walked away. Why? To build something bigger. Top of Mind is a weekly 2–5 minute audio drop from Brad Porter—former Amazon VP of Robotics, Scale AI CTO, and now founder of Cobot. Each short episode delivers raw, unfiltered insights on leadership, automation, and the chaos of building at the edge of physical AI. From warehouse floors to the frontier of machine intelligence, this is what it sounds like when a Silicon Valley leader thinks out loud.