Developed a practical code example for the renovate-bot/java-spanner repository, focusing on demonstrating the Repeatable Read isolation level in Google Cloud Spanner. The work included both client-level and transaction-level configuration, highlighting transaction-level precedence, and incorporated a basic read and update operation within a transaction to clarify correct usage patterns. By updating documentation and providing a tangible Java snippet, the contribution aimed to improve developer onboarding and reduce the risk of misconfiguration. Leveraging skills in Java development, database configuration, and code snippet generation, the work addressed reliable transactional semantics and supported more robust application behavior under concurrent workloads.