🎮 Join the game

⏱️ Two minutes. No account, no install, nothing to download.

Below is an app. Not a picture of one — the thing itself, running on this page, on your phone if that is what you are holding. Everything you touch here was written as text, and you are about to change some.

🐕 The shelter’s dogs

Shelter Desk

Nova has no fee yet. Double-click her fee cell — double-tap on a phone — type any number, and watch the chart answer. That is the whole trick: one source of truth, every view follows. Nobody wired those two together; they read the same three lines of text.

And that window is not a picture of an app. It is one: its own file, running inside this page.

🧪 Now make the page prove it

A page can carry its own promises and check them out loud. Press ▶.

Feature: Every dog can go home
  Scenario: No dog is missing its fee
    Given the shelter's list
    :::python
    self.dogs: Dataset = self.page.dogs
    :::
    Then every dog has a fee
    :::python
    names: list = self.dogs.values("name")
    fees: list = self.dogs.values("fee")
    missing: list = [n for n, f in zip(names, fees) if not f.strip()]
    assert not missing, "no fee yet for: " + ", ".join(missing)
    :::

Red until you fill Nova’s fee, green the moment you do. Not a screenshot of a test — the test, on the page, forever, for anyone who opens it.

🧠 One question

Q: You just typed a number and a chart moved. What did you change?

• The chart — its bars were redrawn by hand.
• Nothing; the page reloaded from a server.
• The data. The chart reads it, so it followed.

• A setting saved in your browser.

  One source, many views. That is the first idea of the whole course, and you just used it before anyone explained it.

🚪 So — want one of your own?

What you just did was ours. The course is about pages that are yours: your data, your app, your proof, kept in your own space and graded from it.

That is what a bench is, and it takes one invitation.

You are on the class roster, so your GitHub invitation is on its way to your @uwm.edu address. Two things, once: sign up for GitHub with that same address — the invitation is waiting for it — then accept, and your bench opens. Nothing else to install, ever.

No mail? Check spam, but you do not need it: sign in to GitHub and open github.com/orgs/uwm-build-ai/invitation — a waiting invitation shows up there. Still nothing after a week? Invitations expire; write to build-ai@uwm.edu and we send a new one.

BUILD-AI runs as a cohort at the University of Wisconsin–Milwaukee. If you want in, contact us at build-ai@uwm.edu.

bot: doc
face:
  zoom: 1.2
script:
  - say: "Two minutes, and you build something. No account needed."
  - at: dog_list
    say: "Nova has no adoption fee. Type any number in her row."
  - at: fee_chart
    say: "The chart followed. You changed the data, not the picture."
  - at: fee_proof
    say: "Now press play. The page checks its own promise, out loud."
  - say: "That is the deal. Pages that run, and prove themselves."
stories: {}