: They became each other’s backup systems. When one crashed, the other held the recovery key.

: A compressed archive of the first trip they took together.

: The soundtrack of their car rides, constantly updated but never quite finished.Their lives began to mirror one another through Version Control . If one made a change—a new job, a move to a new city—the other’s life auto-updated to match the new parameters.

: A mention of a specific scent would trigger a query that brought up a memory from five years prior.