In January 2025, Bilal Mahmoud developed a new API for the Effect-TS/effect repository, introducing conditional execution of effects based on log level. By designing and implementing the Effect.whenLogLevel function in TypeScript, he enabled granular control over logging, allowing effects to run only when a specified log level is active. This approach improved observability and reduced unnecessary computation, enhancing application performance. Bilal applied functional programming principles and library development expertise to integrate the feature seamlessly with the existing effects framework. The work demonstrated a focused, feature-driven contribution, addressing logging overhead without introducing bug fixes during the period of development.