Worked on stabilizing artifact management and file deletion workflows within the ProjectAlita/alita-sdk repository, focusing on improving data integrity and cross-bucket search reliability. Addressed two critical bugs by correcting the schema key registration for artifact search inputs, ensuring proper support for bucket-level queries and removing obsolete fields. Enhanced the deleteFile operation by introducing a pre-delete existence check, which prevents silent failures when attempting to remove non-existent files and propagates meaningful errors to callers. Leveraged Python, Pydantic for data validation, and AWS S3-style API patterns, demonstrating a methodical approach to backend development and robust error handling in SDK environments.