In April 2025, Alex contributed to the HaxeFoundation/haxe repository by enhancing the mutability of loop variables in IntIterator-based for loops. Focusing on compiler development and language design, Alex relaxed strict checks and improved the handling of unrolled loops, allowing loop variables to be modified within the loop body. This change increased the expressiveness and flexibility of for loops in Haxe, while ensuring correctness by generating loop variables only when modifications occurred. The work demonstrated a thoughtful approach to static analysis and code generation in ML, addressing both performance and maintainability concerns within the Haxe language’s core iteration constructs.