Worked on the SAP/fundamental-ngx repository to enhance build reliability by introducing a local Yarn version lock, ensuring all environments use Yarn 4.7.0. This approach addressed dependency drift and improved reproducibility across development, CI, and deployment workflows. The solution involved adding a yarn-4.7.0.cjs file to the codebase, which enforces consistent dependency management and streamlines onboarding for new contributors. Focused on build tools and dependency management using JavaScript, the work prioritized maintenance and process stability over feature expansion or bug fixes. The update provided a safeguard for reproducible builds, supporting long-term maintainability and reducing environment-specific inconsistencies.