During January 2025, João Barbosa focused on improving the correctness of vector instruction semantics in the jasmin-lang/jasmin repository. He addressed a subtle bug in the VPCMPGT operation by updating the comparison logic within JWord.ec, replacing the <= operator with < to ensure accurate 'greater than' behavior. This targeted fix, implemented using ECL and leveraging his expertise in compiler development and low-level programming, reduced misbehavior in vector compare paths and improved downstream code generation reliability. João’s work demonstrated careful isolation of the issue and delivered a low-risk, well-validated change that enhanced the predictability of compiler behavior for users.