March 2026: Implemented enhanced repository rules attribute handling in Bazel, enabling repo rules to define previously reserved attributes, thereby increasing flexibility and usability. Changes to RepoRule covered by commits and tests added to ensure proper functionality. This work aligns with PR 28453 and related issues (#28450, #28453), improves developer experience when authoring custom repository rules, and lays groundwork for broader rule customization. No major regressions detected; test suite coverage expanded.

In 2026-01, delivered two key improvements across two repositories: (1) python/mypy: fixed incorrect overload resolution with generator expressions when reveal_type notes are involved, with targeted tests; this improves type inference accuracy and reduces false overload failures. (2) bazelbuild/bazel-central-registry: updated Redis module for Bazel 9 compatibility, including versioning changes, MODULE.bazel adjustments, and new dependencies/build targets to align with the Bazel 9 toolchain. Result: more reliable type-checking, smoother toolchain upgrades, and improved CI robustness.