It says it right in the program. All vegetables and fruit.
Whole30 and Cranberries
The Whole30 program is not a diet. It’s a way of eating that has you eating mostly natural foods and eliminating most of the other types of foods like sugar, alcohol, dairy and grains that are usually responsible for causing; those bad cravings and habits, blood sugar spikes and hormone changes, digestion issues, immune system flare ups, and inflammation problems, among other issues.
YES: Fresh cranberries are whole30 approved.
NO: Dried cranberries are not whole30 approved due to the fact that they have lots and lots of added sugar.
I personally am a fan of diets that try their best to use mostly natural foods. I would tweak them here and there so that I’m not eating large bowls of mashed potatoes all day, but in general the principle is sound.
Lots of protein, vegetables and fruit like cranberries are a great foundation for any diet or way of eating.
Hope this helps.