In September 2025, Caztanj focused on stabilizing cyclic module evaluation within the LadybirdBrowser/ladybird repository, addressing a critical bug in the JavaScript engine’s module loading process. By removing a redundant verification step from the CyclicModule’s evaluate function, Caztanj streamlined the evaluation path and reduced the risk of edge-case failures, particularly in asynchronous cycles. The work included expanding targeted test coverage to validate asynchronous cyclic module behavior and prevent regressions. Using C++ and JavaScript, Caztanj’s contributions improved the maintainability and reliability of the module system, demonstrating a thoughtful approach to code quality and long-term stability in complex engine internals.