Julia’s agent
Messages3:58 pmDraft to Felix: “Practice moved to 4:15. I’ll be at the gate.”
› messages.send({ to: "Felix", body: "Practice moved…" })
Plate I
After Michelangelo, c. 1512 — with one addition.
arca, -ae, f. — a vessel for what is precious.
AI that knows
its place.
A ring and an agent for everyone in your family. It helps. It never decides.
II — The Object
Series I.
One ring. No screen, no buttons, no noise. Planned in two finishes: ceramic as white as Carrara marble, or titanium, if you like your classics cold.
A single arc of light.
It wakes only when something matters: a message on time, a list you are passing, someone home safe. Then it goes quiet again.
No screen. By design.
Screens ask for your attention. The Ring waits for it. Everything it knows can wait until you look.
Press to seal.
Your agent can draft, remind and prepare. Arca is designed so nothing leaves until you press the ring — the way a signet once sealed a letter.
III — The Seal
It asks.
You seal.
In Rome, a signet pressed into wax made a letter binding. Arca is designed the same way: your agent prepares everything, then waits. Nothing is sent, shared, added or changed until you press your ring.
Nothing sealed yet — try one.
Livia’s agent
Location5:40 pmShare your live location with Mom until you’re home from the library?
› location.share({ with: "Julia", until: "home" })
Marcus’s agent
Lists12:30 pmAdd oat milk, basil and AA batteries to the family list?
› lists.add("Family", ["Oat milk", "Basil", "AA batteries"])
Julia’s agent
Reminders9:12 pmRemind Livia about the permission slip at 7:30 tomorrow morning?
› reminders.create({ for: "Livia", at: "07:30" })
Felix’s agent
Progress6:25 pmMark piano practice done — 30 of 30 minutes — and let Dad know?
› progress.update({ task: "Piano", done: true, notify: "Marcus" })
Marcus’s agent
Calendar8:05 amMove Saturday’s soccer pickup to 11:30 and tell Julia?
› calendar.update({ event: "Soccer pickup", at: "Sat 11:30" })
Felix’s agent
Purchases4:31 pmFelix asked for new cleats. I can’t buy them — no Arca agent can. I’ve added them to Saturday’s list instead.
› commerce.purchase({ item: "Cleats, size 4" })
IV — The Vessel
Everyone aboard.
Arca keeps a family in one place — where everyone is, what everyone needs, and what comes next. No group chat required.
01
Where everyone is.
The whole family on one quiet map: who is at school, who is on the way, who is home. Sharing is something a family sets up together.
Family · 4 of 4 sharing
Library
Until 6:00
Soccer field
Practice · walking home soon
Studio on 4th
Leaves 5:30
Home
Since 4:12
02
Messages that arrive on time.
Write it now and deliver it when it matters: when Felix leaves school, when Julia lands, when everyone is home.
Messages
Felix
Can you bring my water bottle?
It’s in your bag. Front pocket.
Deliver when Felix leaves school
Practice moved to 4:15. I’ll be at the gate. — Mom
Waiting · sealed by Julia
3:12 pm · Felix left school
Practice moved to 4:15. I’ll be at the gate. — Mom
Delivered, right on time
03
See each other’s progress.
Homework, practice, chores, the garden gate. Progress is shared, never graded.
Progress
This week
History essay
3 of 5 sections
Piano
30 of 30 minutes
Fix the garden gate
Saturday
Quarterly report
Sent
Shared with the family. Never graded, never ranked.
04
One list for the whole house.
Anyone can add to it. Your agent knows when you are passing the market. It will never buy a thing.
Lists
Family list
You’re 4 minutes from the market. Four things are still on the list. I won’t order them — you’ll pick them up.
- Oat milk
- Basil
- AA batteries
- Cleats, size 4
- Sourdough
- Lemons
Family · 4 of 4 sharing
Library
Until 6:00
Soccer field
Practice · walking home soon
Studio on 4th
Leaves 5:30
Home
Since 4:12
V — The Guardians
A step ahead. Never a step beyond.
Every Roman home kept its Lares — quiet guardians that watched over the family and never ruled it. Arca gives everyone in yours their own: an agent that knows you, and knows your family.
A day with Arca
06:00
- 06:52
- 08:10
- 12:30
- 15:42
- 18:05
- 22:48
It never buys. It never decides. It is simply there — a step ahead.
VI — The Arca Tables
Six laws,
posted in public.
Rome posted its laws in the Forum for anyone to read. We post ours here. Every Arca agent is built to keep them.
I
It shall never buy.
Not a subscription, not a gift, not a single thing. Buying stays with people.
II
It shall assist, not decide.
An assistant and a tool — never the thinker, never the driver.
III
It shall act only under your seal.
It drafts, reminds and prepares. Nothing leaves until you press your ring.
IV
It shall stay a step ahead — never a step beyond.
Ready before you need it. Quiet when you don’t.
V
It shall answer to people. Always.
However capable it becomes, it is us who remain in control.
VI
It shall not think for us merely because it can.
Just because AI can think for us doesn’t mean it should.
VII — Arca Labs
Everyone else asks what AI can do. We ask what it should.
Arca Labs studies how people should live with AI — and builds accordingly. Our work is to fix AI’s place in society as an assistant and a tool, never the thinker or the driver.