Worked on the lichess-org/zulip repository to enhance the reliability of data imports, specifically addressing the handling of direct and group direct messages during database migration. Focused on backend development using Python, Django, and SQL, the work introduced an is_direct_message_type flag to ensure that imported direct messages do not retain a topic name, improving data integrity and user interface consistency. Additionally, a batch-capable migration was implemented to reset any existing non-empty topic names for these messages, ensuring consistency across third-party exports. The approach emphasized efficient data hygiene and stability, with changes delivered through targeted bug fixes and migration scripts.