Connor McEntee focused on build system hardening for the redpanda-data/redpanda repository, addressing Bazel module handling to support non-root module usage. He improved dependency management by updating dev_dependency flags for rules_cc, rules_python, and toolchains such as LLVM, Go, Rust, and OCI, ensuring their availability during builds. Connor reordered crate.annotation() to precede use_repo(), enhancing clarity and correctness in the build configuration. His work, primarily using Bazel and leveraging skills in build system configuration, improved build reliability and CI stability, enabling reproducible builds across diverse environments. The depth of his changes addressed nuanced dependency issues in complex build pipelines.