Worked on the google/adk-python repository to enhance the reliability and API conformance of sandbox input file handling. Addressed a critical bug in the AgentEngineSandboxCodeExecutor by correcting JSON field names for input files, ensuring compatibility with API expectations and preventing runtime errors. Employed Python for backend development and API integration, and reinforced the fix with a dedicated regression test to verify correct payload structure. Validated all changes through comprehensive unit testing and pre-commit checks, maintaining code quality and stability. Collaborated across teams via pull request review, contributing to a robust and maintainable codebase focused on backend reliability and testing.