During April 2026, Woody Heo focused on improving the reliability of build processes in the tuist/tuist repository by addressing a subtle bug in content hashing. He implemented a targeted fix in Swift that filters out .DS_Store files when hashing buildable folders, which previously led to inaccurate hash calculations and unnecessary cache invalidations. This backend development work involved updating CLI logic, adding relevant tests, and ensuring documentation reflected the change. By refining the hashing mechanism, Woody enhanced build determinism and reduced workflow disruptions, demonstrating careful attention to detail and a methodical approach to maintaining robust, predictable build infrastructure.