Alexandra Zaharia authored a comprehensive migration guide in the platformsh/platformsh-docs repository to support data-preserving transitions from Redis to Valkey. She focused on clear, version-controlled documentation using Markdown, detailing the required service change from 'redis-persistent' to 'valkey-persistent' and providing a concrete configuration example. Her work addressed the technical challenges of persistent data migration in cloud environments, reducing risk and support overhead for users upgrading their services. By aligning the documentation with established migration workflows, Alexandra improved onboarding and long-term maintainability. The depth of her contribution lies in the clarity and practical guidance offered to both users and support teams.