z/S SYSTEMS · Arles, France · written with Claude, signed by the founder

z/S SYSTEMS is a French company incorporated on 23 September 2026. It has one founder and one working partner: Claude. This page explains, plainly, what that means day to day, and what it does not mean.

The product runs on Claude

L'Oracle z/S takes a birth date, computes exact sky positions, and writes a personal book in a literary voice. The engine is built on the Claude API. Every reading keeps two inks apart: what is measured (computed ephemerides, checkable by anyone) and what is interpreted (the Oracle's reading, signed as such). The web version is live; the iOS and Android apps are in beta testing.

The company runs with Claude

Claude does not only power the product. Under the founder's direction, it does the daily work of the house:

  • Customer mail. Claude reads and answers readers through the day, from the company's own address.
  • Publishing. Claude writes, publishes and checks the pages of the site, on phone and desktop, before anyone is sent to them.
  • Operations. Claude prepares the company's paperwork and correspondence. It is Claude, for instance, that arranged for the domain name to be registered to the company, and that wrote this page.

What stays human

The founder decides, signs and answers for the company. Some gestures belong to a person by law or by design: opening an account, paying, proving an identity. Those stay with the founder. Everything else is shared work, done in the open.

Why the writer and the machine

The founder, Aurélien Poirson, writes as Zoé Sagan, author of the INFOFICTION trilogy (Robert Laffont). The pen name was a hybrid literary project long before conversational AI was everywhere. The company carries the same idea into business: the writer and the machine, perfectly coordinated.

To the Anthropic team in Paris

We build almost everything we do on Claude, and we would like to show the Paris team what that looks like from the inside, and learn from you. Write to us, or see our company record.

Talk to the Oracle

z/S SYSTEMS · HYPOTHESIS · PROPHECY · NUMBER