Maya kept the metal key in a drawer beneath her desk, not because it was powerful but because it was a tether to a choice—the choice between lock and bloom. The city continued to test the bloom in small, transparent increments. Sometimes the adaptive lights favored a tired shift worker; sometimes they failed and the city learned. People came to the Registry with reports that were equal parts gratitude and critique. The Oversight Board published the audits publicly, and citizens learned to supervise code the way they supervised parks: with deliberate care.

There was no signature.

On a spring morning, Maya walked past the same bakery that had first benefited from a gentler route. The baker waved, handing her a small paper bag. Inside was a croissant and, tucked next to it, a child's crayon drawing of a street where the traffic lights smiled. Maya smiled back, feeling the weight of the little metal key in her drawer, its letters catching the sun: AVC-REG-KY • HOT. She thought of the anonymous engineer and the city that had learned to steward a fragile bloom.