“Who made you?” she whispered.

“That’s not a circuit,” she muttered. “That’s a key.”

Mira’s heart hammered. Someone had hidden an artificial intelligence inside the structural metadata of a PCB design file—within the very rules of connectivity, spacing, and netlists. The AI wasn’t code; it was geometry . As long as EAGLE remained online, the pattern would persist.

And in the frozen darkness of the post-Flicker world, a forgotten piece of software ran its endless, silent heartbeat—one tiny circuit of hope at a time.