Worked on the symfony/ai-store repository to enhance vector search capabilities and standardize API behavior across backend implementations. Developed a flexible distance metric system for the Postgres vector store by introducing a Distance enum, allowing users to specify various distance metrics beyond the default L2 during store initialization. Updated the query interface by replacing the minScore argument with maxScore, ensuring consistent filtering by maximum similarity across both MariaDB and PostgreSQL backends. Focused on backend development and database integration using PHP, PostgreSQL, and vector database concepts, the work improved cross-store compatibility and provided clearer traceability for changes within the codebase.