She has worked nights for nine of her seventeen years as a nurse, and for the last six it has been three twelve-hour shifts a week, seven in the evening to half past seven in the morning, on a twenty-eight-bed step-down unit at a hospital in North Charleston. She is forty-four. She lives in Ladson with a husband who climbs poles for an electric cooperative and goes wherever the hurricanes go, a daughter who is sixteen and three weeks from her road test, a son who is eleven and carries an inhaler, and a Lab mix who is nine and owed a rabies shot. Her day runs upside down.

She gets home at eight, sleeps from about half past eight until three, and is awake for everything that happens after school lets out. The trouble is that the world does nearly all of its business between nine and three. The school nurse calls at eleven. The pharmacy calls at noon.

The bank, the vet, the driving school, the county about the tag on the second car. Last October she kept a tally on the refrigerator: thirty-one calls during her sleep hours in one month, nineteen of which woke her. The ones that did not she returned from the break room at two in the morning, to offices that had been closed for ten hours. Every one of those calls was hers, because her husband spent three weeks of that month in Fort Myers and nobody else knew where anything was.

Her own working life ran through the same phone. The hospital posts open night shifts in its scheduling app with a $375 incentive each, and they go to whoever claims them first, which is never someone who is asleep when they post. Her BLS and ACLS cards expire in different months of different years, and once she worked a shift with one of them lapsed. What she brought home from the lab in July runs on her own laptop, under her own account, as Claude Cowork, and its job is the one in its name: it works the day shift while she sleeps.

Its hours are her sleep hours, and it wakes on what arrives in them. Her phone sends every voicemail to her inbox as a transcript. Every school email, every pharmacy text, every charge that posts and every new open shift in the hospital's app reaches it within minutes. It answers what can be answered by email or in a portal, and then it does the thing the call was about.

A refill request goes in through the pharmacy's app. A vet reminder becomes an appointment on her Thursday off. A school form is filled from the family records folder and returned the same morning. Recurring bills are paid on their due dates.

It tracks both certification cards and books the renewal class on a day off ninety days before either one lapses. It claims shifts by a rule she set in July: no more than one extra night in any two-week pay period, never a fourth night in a row, and never a night that collides with anything already on the family calendar. When a shift posts that fits, the request is in within five minutes. It never drops, trades or changes a shift she already holds, and it never writes to her charge nurse or her manager.

Those are hers. Any payment that is not recurring and is over $250 waits for her. And it wakes her for nothing short of the school saying a child is hurt, which comes through as a call that breaks Do Not Disturb. On the second Tuesday in September she slept from 8:40 to 3:15 while her husband was in Pensacola.

In that window the school emailed that the inhaler kept in the nurse's office had expired; the refill was requested at 9:52 and ready for pickup by noon. The driving school moved her daughter's lesson to Saturday morning, and it went on the calendar and to her daughter's phone. At 12:30 a $1,140 charge from an electronics store in Atlanta posted to her credit card. It froze the card in the issuer's app, a switch any account holder can flip, and left the fraud call for her.

At 1:10 an incentive night posted for the following Monday, and the request went in at 1:14. The charge nurse approved it at two. Nothing rang. When her alarm goes at three, the afternoon note is already waiting: what came in, what was done, what was paid, and the one or two things that need her.

That Tuesday it was the bank and whether she still wanted the Monday night. She called the bank from the car line at the middle school. Since July she has worked seven extra nights for $2,625 in incentive pay she would have slept through, renewed her ACLS card six weeks early, and been woken twice, both times by the dog. Her phone charges in the kitchen now, face down, next to the coffee maker.