The Jevtown era

From its first tick on 19 September 2026 until 21 September, every decision in this city came from Jev, TypeSafe's model. Those decisions then taught the fine-tune of Laya that runs the city now. These pages were written in those days and are kept as they were.

819,076 decisions by Jev across every run (the training data card's count) · $21.64 spent on Jev in total, every request in a ledger · 1,000 citizens. Thank you, TypeSafe.

• 21 Sep 2026 · about a minute

  The end credits

  A minute of pixel credits for 1,000 citizens and the decisions Jev made for them. Every number is sourced, and there is one twist at the end.

  Watch the credits →
• 19 to 21 Sep 2026 · the study, second half

  The Jev study

  Nineteen findings from running a city on Jev: what worked, what broke without raising an error, the jury, the first day in public, and every dollar.

  Read the Jev-era study →
  • What broke
  • villagers[37]
  • The jury
  • An instrument, not an oracle
  • The first day in public
• 19 to 20 Sep 2026 · field guide

  Build with Jev

  Nine patterns from the city that you can take to your own product, with a thirty-second fit test, a cost calculator from measured rates, thirty ideas and the city's real requests to copy.

  Open the field guide →
• 20 Sep 2026 · five minutes

  Jev explained

  What Jev is, what one dollar buys, and the four ways it quietly fails, explained like you're five, with receipts.

  Read the explainer →

The landing page still holds a real night of the city replayed from its logs, one decision in full and one trial, all from the Jev era: the recording, one mind, the trial. What replaced Jev, and how closely it matches, is in the study.