Autonomous Legacy Web Application Upgrades Using a Multi-Agent System. - Valtteri Ala-Salmi; Zeeshan Rasheed; Malik Abdul Sami; Zheying Zhang; Kai-Kristian Kemell; Jussi Rasku; Shahbaz Siddeeq; Mika Saari; Pekka Abrahamsson (ENASE, 2025)