Worked on the google/adk-python repository to enhance agent name validation, focusing on preventing naming collisions with user-authored events. Addressed a critical bug by updating the validation logic to explicitly reject the reserved keyword 'user' while allowing case variations such as 'User' and 'USER', thereby maintaining flexibility without compromising data integrity. Developed and expanded unit tests using Python and pytest to confirm the exact rejection criteria and to document expected behavior, ensuring future changes remain robust. This targeted update improved the reliability of agent identification and provided clear guardrails for future development, with all changes tracked and thoroughly validated.