Project four
The one that did not ship but changed how you work.
The brief
What you were asked to do, or what you set out to do. One paragraph, with the constraint that made it interesting.
The work
What you actually did, the decision you are proudest of, and the one you would make differently. Specifics beat adjectives.
The result
What changed because of it — a number if you have one, a quote if you do not, and an honest line if neither.