Worked on stabilizing the Eclipse PDE AST parsing pipeline by addressing a critical bug in the eclipse-pde/eclipse.pde repository. Focused on compiler design and IDE development using Java, the work involved upgrading the AST parser to support the latest Java language features, specifically resolving crashes related to pattern matching in switch statements. The technical approach replaced the deprecated JLS4 constant with getJLSLatest(), ensuring the parser remains compatible with current and future Java specifications. This update improved parser reliability, reduced risks for downstream tooling, and enhanced the maintainability of the codebase for users relying on modern Java development workflows.