Build a Vertical Slice

Choose one thin user action that crosses every necessary layer and produces a visible result.

Choose

The question

What is the smallest end-to-end path worth running?

Do this

Prefer one complete workflow over one completed technical layer.
State what the slice proves and what it does not.
Keep the path real even when the data and interface are deliberately small.

Example

Show one product from one stored row through one endpoint on one page. It proves rendering, transport, and persistence connect; it does not prove catalog scale or search.

Ask next

?What user action completes?
?Which boundaries does it cross?
?What important claim remains untested?

Continue in the specialist domain

Software Design: Vertical Slices →

Code structure and slice boundaries are developed in the design domain.

Let Dependencies Gate; Let Value Order →