How 3 Java Champions Use GitHub Copilot for Productivity

Three Java Champions with over a decade of Java experience each shared how they use GitHub Copilot in production and open source work. Vlad Mihalcea built a Hypersistence Optimizer web app in two days instead of weeks, and created custom skills trained on 65 of his articles to match his writing voice. Patrick Baumgartner migrated roughly 900 teaching slides across 15 presentations from Reveal.js to Marp with Copilot, verifying results through screenshot comparisons.