Zhizhen developed a resource locking mechanism for the gchq/CyberChef repository, focusing on concurrency control within JavaScript workflows. The feature introduced a basic lock to prevent race conditions when multiple processes accessed shared resources, laying the groundwork for safer parallel operations. Zhizhen applied principles of lock-based synchronization and parallelism patterns, ensuring that concurrent workflows could execute without risking data integrity. Although no major bugs were reported or fixed during this period, the work established a foundation for future performance improvements and safer concurrent processing. The disciplined approach demonstrated a solid understanding of concurrency design and commit management in a collaborative environment.