Worked on stabilizing cross-database session handling for the google/adk-python repository, focusing on backend development and database management using Python. Addressed a MySQL-specific timezone compatibility issue in the create_session function, ensuring session-append operations no longer failed due to mismatched datetime storage. The solution involved stripping tzinfo for MySQL, aligning its behavior with SQLite and PostgreSQL, and unifying session lifecycle marker handling across all supported dialects. Expanded unit testing to include MySQL in dialect parametrization, updated coverage, and verified changes with Testcontainers MySQL 8.0. Contributed to code review and documentation, supporting a stable release cycle and improved cross-database consistency.