During December 2025, Mikhail focused on security maintenance for the aignostics/python-sdk, addressing a critical vulnerability in the marshmallow dependency. He upgraded marshmallow to version 3.26.2 to remediate CVE-2025-68480, thereby reducing security risk and improving reliability for downstream users. The work emphasized secure dependency management and compliance, with careful validation through continuous integration pipelines to ensure backward compatibility. Although no new user-facing features were introduced, Mikhail’s targeted approach maintained the SDK’s stability and trustworthiness. His efforts leveraged Python and security compliance best practices, demonstrating depth in risk mitigation and maintainable engineering within the context of open-source software development.