During April 2025, Xiao Sai developed bind variable support for the Oracle ADB document loader in the langchain-ai/langchain repository. This work introduced a new parameters argument, allowing users to execute secure, parameterized SQL queries and reducing the risk of SQL injection. Xiao refactored the Python loader to support dynamic query construction and updated the documentation to guide users on best practices for bind variables and security. The project demonstrated skills in Python development, SQL, and database integration, with a focus on API design and open-source collaboration. The feature was merged into the main branch, reflecting a well-scoped engineering contribution.