Worked on the langfuse/langfuse repository to implement a robust prompt-folder deletion workflow, focusing on user safety and data integrity. Developed a feature that enables users to delete entire prompt folders with a confirmation step, ensuring that nested prompts are removed while preserving those with identical folder names elsewhere. Enhanced the workflow by strengthening SQL LIKE injection protections and expanding end-to-end test coverage to address complex nested deletion scenarios. Utilized JavaScript, TypeScript, and React within a Node environment to deliver maintainable, well-tested code. Also contributed to code quality by applying linting and formatting improvements, supporting long-term maintainability and reliability of the project.