During February 2025, Jimmy focused on stabilizing Gazelle’s per-file generation behavior for Python targets in monorepos within the JetBrains/rules_python repository. He addressed a bug where Gazelle incorrectly merged multiple py_binary targets during partial updates, which could compromise build correctness. Using Go and Python, Jimmy implemented logic to ensure that when multiple Python binaries exist without a __main__.py file, new targets are created rather than merged. He reinforced this fix with regression tests, leveraging Bazel and unit testing to validate the solution. This work improved monorepo consistency and reduced maintenance risk, demonstrating careful attention to build system integrity.