William Johansson focused on improving build tooling and dependency management for the einride/sage repository over a two-month period. He upgraded key code generation tools, including protoc-gen-go-aip-test and protoc-gen-typescript-aip, to incorporate upstream bug fixes and minor enhancements. By isolating changes to version declarations in Go, he minimized risk and enabled straightforward rollbacks. His work stabilized the continuous integration pipeline, reduced the likelihood of generation-related regressions, and ensured reproducible builds. William’s approach emphasized careful version management and documentation, supporting faster iteration cycles for downstream features. He primarily worked with Go, leveraging skills in build tools and dependency management throughout.