Marc Bellavista Fabrega focused on improving code quality and maintainability in the Som-Energia/openerp_som_addons repository during November 2024. He addressed formatting inconsistencies in the GiscedataPolissaModcontractual module, making targeted cosmetic adjustments to whitespace and newlines in som_auvidi/giscedata_polissa.py. Working exclusively in Python and following OpenERP/Odoo addon development practices, Marc used Git for disciplined version control and code review. While no new features were introduced and there were no user-facing changes, his efforts reduced the risk of future formatting errors and improved overall code readability. The work demonstrated attention to maintainable engineering, though the technical depth was limited.