Worked on the JetBrains/hirschgarten repository to improve the Bazel build system by addressing a mutation issue with frozen Python info lists in the python_info BSP aspect. The solution involved a targeted bug fix in Python, ensuring that imports are processed safely and without unintended side effects, which enhanced build determinism and stability. This change was delivered through a single commit, integrated via a pull request and cherry-picked for traceability. The work demonstrated a strong understanding of Bazel build system internals, Python development, and software engineering practices, focusing on preventing subtle bugs that could impact build reliability in complex environments.