Andrey Kozhevnikov contributed to the facebook/buck2-prelude repository by improving code hygiene in the python_wheel.bzl build script. He refactored a helper function name to ensure compliance with Starlark linting rules, maintaining the existing wheel-building functionality while aligning the codebase with project standards. This update addressed ongoing lint-related CI issues, resulting in more reliable continuous integration and reduced technical debt. Andrey’s work demonstrated skills in Starlark, build system configuration, and Python/Bazel integration. The change enhanced maintainability and onboarding for future contributors, reflecting a focused approach to code quality and long-term project stability within a short engagement period.