During December 2025, Petz Bloom developed the Card Assignee Management feature for the basecamp/fizzy repository, focusing on enhancing task ownership and collaboration within teams. Using Ruby on Rails and Jbuilder, Petz updated the _card.json.jbuilder file to include assignee data in card objects and implemented logic to enforce a five-assignee limit per card. This approach improved visibility into task assignments, supported better workload distribution, and facilitated faster handoffs. The work demonstrated solid back end development skills in Ruby, with careful attention to data modeling and performance considerations. No major bugs were addressed during this period, reflecting a focused feature delivery.