December 2025 monthly performance focused on stabilizing cross-repo linking behavior and preserving business value through correct linker flag propagation on macOS. Implemented a targeted fix to prevent deduplication of linkopts in cc_shared_library dependencies, which previously collapsed flags like -framework Security -framework IOKit into an invalid single token, causing linking failures. The work spans two repos (bazelbuild/bazel and bazelbuild/rules_cc) and includes MacOS-specific regression coverage to guard against relapse. The changes were implemented with attention to testability across repositories and CI, acknowledging propagation delays for inter-repo tests. Closes issues #27735 and #27755. This work reinforces macOS build reliability and cross-repo integration for C/C++ toolchains in Bazel.

July 2025 monthly work summary for cplusplus/draft. Delivered a targeted documentation improvement with a low-risk, high-value fix to improve clarity and accuracy of the technical docs. No new features were introduced this month; focused on quality and maintainability of the repository.