Jason worked on enhancing build system reliability for the bufbuild/protovalidate repository by delivering Bazel 9 compatibility and improving build stability. He addressed Bazel 9’s stricter rule loading by explicitly loading the cc_proto_library rule, ensuring that protovalidate builds cleanly in updated Bazel environments. Additionally, Jason resolved a minor sha256 warning in the buf toolchain, which reduced unnecessary CI log noise and improved clarity for developers. His work focused on build system configuration and protobuf integration, using Bazel as the primary language and tool. The changes maintained backward compatibility, targeting Bazel 9 users without affecting existing workflows for other environments.