The moment Leo clicked Run , the basement changed.

“Still fighting the Braun, Gramps?”

“Pathetic,” Arthur grumbled, tossing a cheap crescent wrench into a bucket. “I used to talk to satellites. Now I can’t talk to a radio.”

Arthur hesitated. Pride was a heavy anchor. But the Braun sat there, mute and smug.

“It’s a conspiracy,” Arthur muttered. “They make the diagnostic tools worse every year.”

“It’s new,” Leo said. “Open source, but better. It merges hardware debugging, code editing, and AI-assisted repair. People are using it to fix Mars rovers—well, simulators, anyway. And old radios.”

Arthur sat down slowly.