A student only collects final work and does not see how it has improved. I propose an essential portfolio with an attempt, a review and a brief explanation of the choice.
In the example, the comparison makes visible what he has also learned with assistance. The material should be selected, avoiding unnecessarily invasive archives.
The documentation should serve the student and the teacher. It does not automatically demonstrate every skill, but offers more informative elements than just the product finished at the last moment.