During May 2025, Brandt Bucher developed Windows build tooling for the python/release-tools repository, enabling Just-In-Time (JIT) compilation and free-threaded builds by default through Azure Pipelines automation. He focused on build automation and CI/CD, using Python, Rust, and YAML to streamline Windows release processes and improve release stability. In the astral-sh/ruff repository, Brandt addressed a code correctness issue by aligning the ty tool’s integer division and modulus semantics with Python’s rules, resolving discrepancies with Rust’s behavior for negative numbers. His work demonstrated depth in cross-language semantics and type inference, resulting in more reliable and maintainable release workflows.