April 2026 monthly summary for facebook/buck2 and buck2-prelude. Delivered Apple ARM64e support across BUCK2 and its Prelude constraint system, enabling Pointer Authentication on ARM64e while preserving backward compatibility with existing arm64 configurations. Implemented an orthogonal _arm64e constraint axis, updated AppleArch and toolchain platform defs (arm64e-apple-ios), and adjusted XCFramework parsing to resolve arm64e first. Introduced opt-in enrollment for apps by adding ios_platforms.IPHONEOS_ARM64E to supported_cxx_platforms, ensuring non-breaking rollout. Consolidated SDK dependency mappings to arm64 for arm64e parity.

December 2025 monthly summary for facebook/igl: Focused on delivering robust OpenGL function loading enhancements via ROAI annotations, improving initialization, performance, and extension reliability. Updated preprocessor to enable ROAI annotations unconditionally and landed changes from APK test. Notable commits included 7b60f0956a11a3c9bb5209052393b34a83017b63 and 6dcd2b3725805335d06d286da5b33d0ccd28ff6f, which increased ROAI coverage to additional callsites (xCFI) and reduced runtime risks.

April 2025 monthly summary for facebook/folly focusing on stability and robustness of exception handling under Clang. Implemented CFI-vcall as the solo scheme to improve reliability in no_sanitize builds and addressed CFI-icall-related fragility by enhancing exception_ptr_get_object_. This work reduces crash risk and improves predictability in Clang builds, delivering business value with secure, stable error handling across platforms.