Worked on the PCL-Community/PCL2-CE repository to deliver a new LegacyFix compatibility wrapper, replacing the older RetroWrapper and extending support for legacy Minecraft versions. The approach involved updating launch logic, configuration files, and UI components using C#, Java, and XAML, while also adding a dedicated LegacyFix JAR resource. Refactoring the legacy-check flow in ModLaunch.cs simplified version detection and reduced code complexity, paving the way for easier maintenance. By consolidating legacy support into a single, forward-compatible wrapper, the work broadened the potential user base and reduced compatibility issues, resulting in a more streamlined and maintainable legacy support strategy.