Delilah Wu developed the CredentialCache Path Customization feature for the microsoft/rushstack repository, enabling users to specify custom file paths and filenames for credential storage instead of relying on a fixed location. She approached the problem by decoupling the CredentialCache logic from hardcoded paths, improving integration with external systems and reducing configuration friction for both users and CI pipelines. Using Node.js and TypeScript, Delilah focused on API development and configuration management to ensure maintainability and usability across Rush Stack components. The work was delivered with minimal disruption, no critical bugs reported, and prepared for release as part of the June 2025 update.