June 2025 performance summary for bazelbuild/rules_rust. Focused on enhancing Rust toolchain configurability within Bazel rules, enabling local toolchains with non-standard source locations through a new rustc_srcs_path attribute and supporting sysroot_src customization in generated rust-project configurations. This aligns with broader goals of improving developer onboarding, CI reliability, and reproducibility of Rust builds.

February 2025 monthly summary for facebook/buck2-prelude: delivered a customizable archiver feature for system_cxx_toolchain to support environments with prefixed archivers (e.g., conda) and llvm-ar; extended legacy tool info to accept an optional archiver attribute. This work improves cross-platform compatibility, reproducibility, and developer productivity by allowing explicit archiver configuration in builds.