Bestellterminal in einem Restaurant
you order.
a tray appears.
what happened
in between?
image: ai-generated (gpt-image-2)

every computable piece has this shape

a box with clear edges brings its own test

if you know the input and expected output, you have a test.

the sender is a box

what enters the receiver?

your eyes see red. the box sees four numbers.

try it: what does the sensor see?

boxes connect when their edges agree

an agreement at every boundary.
to find the fault,
follow the data.
test one boundary at a time.

one box from the outside

open a box only as far as your question requires.

the shape survives every level

two relationships, two questions

the right level is the one
you can test.

every box leaves two questions

the map of the next weeks

an AI agent is a box, too

you do not need trust when you have a test.
Ausgabe einer Restaurantküche
next:
open the box.
image: ai-generated (gpt-image-2)