During November 2025, JPCC077 enhanced the web-infra-dev/rspack repository by implementing a configurable maximum worker threads feature for parallel loaders within the loader-runner module. This work involved updating type definitions to support user-defined worker limits and integrating logic to enforce the specified maximum, allowing teams to optimize resource utilization based on their infrastructure. JPCC077 also developed comprehensive tests to ensure correct behavior and configurability of the worker pool size. The project was executed using JavaScript and Node.js, demonstrating full stack development and testing skills. The depth of the implementation addressed both usability and maintainability for scalable build processes.