March 2026 focused on clarifying and aligning APEX path handling across Buck2 and Buck2-prelude. Implemented explicit apexesToInstall naming in Buck2-prelude ArgsParser to reflect APEX path storage, and pursued cross-repo alignment in Buck2 with related commits. To maintain stability, the InstrumentationTestRunner nomenclature was reverted back to apexesToInstall in both components, preventing downstream breakages. Result: clearer, consistent field naming, reduced risk of path misinterpretation, and improved maintainability across the repo surface.

February 2026 monthly summary for Buck2: Strengthened test reliability and coverage correctness for AR/VR Python paths. Implemented end-to-end validation test to ensure only the intended Python files are covered, and enhanced existing tests to improve coverage validation processes, reducing risk of coverage drift and AR/VR-related regressions.

February 2025 was focused on strengthening test instrumentation tracking and test stability for the facebook/buck2-prelude repository. Delivered two key features that improve observability, determinism, and reliability in remote/test execution pipelines, with clean, review-friendly commits and clear ownership. Impact highlights include: improved granularity of test execution data, reduced flakiness in remote test runs, and safer defaults for device configuration during Buck tests, all aligning with broader CI reliability goals.