During March 2026, Kaluchi focused on stabilizing the Java compiler within the eclipse-jdt/eclipse.jdt.core repository by addressing a critical bug in native varargs handling. Using expertise in compiler design, Java, and unit testing, Kaluchi implemented a targeted fix that corrected the misclassification of native varargs methods as signature-polymorphic. This change improved the compiler’s ability to correctly process user-defined classes with native varargs, reducing build-time errors and enhancing reliability for downstream projects. The work was thoroughly documented and linked to both commit and pull request for traceability, reflecting a depth of understanding in maintaining correctness within complex compiler codebases.