If the co-founder is taking any code, data, or customers to the next venture, then it seems fair the other co-founder should get something out of the new ventur

If the co-founder is taking any code, data, or customers to the next venture, then it seems fair the other co-founder should get something out of the new venture. If the co-founder is taking just knowledge, best-practices, know-how, and life experience, then the other co-founder does not have any legal basis to expect anything.