Worked on the letta-ai/letta repository, focusing on backend reliability and user action attribution. Addressed two targeted bugs by updating Python code to ensure that load_file_to_source correctly identifies the acting user through an added actor argument, improving auditability and correctness. Additionally, resolved an AttributeError in the LettaResponse HTML representation by correcting attribute usage in the _repr_html_ method, which stabilized UI rendering and reduced potential support incidents. The work demonstrated strong debugging skills and attention to robust rendering, with all changes delivered as precise, patch-level updates. Utilized Python and backend development expertise to enhance system reliability and maintainability.