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, Bilal enabled granular control over logging, allowing effects to run only when a specified log level is active. This approach leveraged functional programming principles and focused on enhancing observability while reducing unnecessary computation and logging overhead. The work demonstrated thoughtful API design and seamless integration with the existing effects framework, addressing the need for more efficient logging control without introducing new bugs or regressions during the development period.