February 2026 highlights for CTSRD-CHERI/cheribuild: Stabilized the build environment and corrected version-relocation logic to improve correctness in CheriBSD builds. Delivered two major bug fixes that reduce build flakiness and enhance cross-ABI reliability, and hardened the build process to prevent system configuration files from polluting builds. These changes improve reproducibility in CI and local development, enabling more reliable validation of CheriBSD-related work. Overall impact: fewer flaky builds, more predictable integration cycles, and better handling of emulated TLS and ABI flags in code-pointer relocations. These deliverables support long-term maintainability and faster iteration for CHERI/ CheriBSD tooling. Technologies/skills demonstrated: Python scripting and build config tuning (target_info.py), version/relocation flag handling, environment isolation and build-system hardening, disciplined commit practices with precise, small changes.

January 2026 monthly summary for CTSRD-CHERI/cheribuild. Focused on stabilizing QEMU type handling and removing an invalid MORELLO option to prevent KeyError and ensure only valid QEMU types are referenced. This work strengthens build automation reliability and reduces runtime errors in CI and deployments.

December 2025 highlights for CTSRD-CHERI/cheribuild: Delivered enhancements to error handling and build configuration for CheriBSD targets, improving reliability, automation, and user experience in the build system.

Concise monthly summary for 2025-11 focused on delivering business value through feature delivery, stability improvements, and CI/build-system hardening for CTSRD-CHERI/cheribuild. The month emphasizes concrete outcomes, reduced CI failures, and demonstrated technical proficiency in cross-target builds and image customization.

October 2025 monthly summary for CTSRD-CHERI/cheribuild focusing on business value and technical achievement.

Concise August 2025 monthly summary focusing on risk reduction and documentation quality in riscv/riscv-cheri. No new features delivered this month; primary effort was a bug fix in CHERI-RISC-V docs to correct ADDIY assembly syntax and to clarify its distinction from the integer 'add'.

July 2025 monthly recap for llvm/clangir: Delivered a targeted sanitizer compatibility improvement for FreeBSD by removing Linux shmctl handling. This reduces Linux-specific command processing for FreeBSD binaries, ensuring correct syscall handling on FreeBSD and preventing related errors. The change enhances cross-platform reliability of the sanitizer in mixed environments and simplifies maintenance by avoiding Linux-only code paths.

June 2025 OpenSSL maintenance focused on clarifying assembly-level documentation to reduce misinterpretation and maintenance risk around modular exponentiation carry flag behavior.

May 2025 monthly summary for riscv/riscv-cheri. Primary focus was safety and correctness improvements around CBO.INVAL bounds checking, with a targeted revert and documentation update to reflect the stricter bounds policy. The change reverts a previous modification to require whole-line bounds for CBO.INVAL, ensuring intended semantics and preventing out-of-bounds writes. The corresponding documentation updates clarify the corrected behavior and usage expectations. This work reinforces memory safety and security posture while maintaining compatibility with existing CHERI semantics.

April 2025 monthly summary for CTSRD-CHERI/cheribsd focusing on key features delivered, major bug fixes, impact, and technologies demonstrated. Delivered items include network driver checksum offload fix, procstat improvements, SOCDEV_PA enablement for purecap ARM64 with EARLY_PRINTF, and preservation of capabilities in IOCTL handling within bridges. These changes increased network reliability, improved diagnostic accuracy, enhanced debugging capabilities, and strengthened security posture by preserving capabilities in user-space interfaces. Commits reflect targeted kernel-level changes that deliver measurable business value by reducing false positives, improving output fidelity, and enabling deeper debugging for arm64 purecap deployments.

March 2025 monthly summary highlighting key features delivered, major bugs fixed, and overall impact; OpenSSH integration in CheriBSD build, CHERI submodule compatibility updates, sanitizer test suite enhancements, kernel/compiler/runtime and CHERI relocation fixes for AArch64, and Morello WebKit CI stability workaround, plus notable business value improvements in CI reliability and cross-platform robustness.

February 2025 focused on hardening entropy collection, ABI hygiene, system-call interfaces, and build/test reliability across CHERI projects. Delivered and refined entropy/RNG configuration for Morello FPGA in cheribsd, implemented ABI/ptr-type modernization for hybrid userspace, fixed critical EFI runtime DAIF preservation on ARM64 Morello, and aligned RISC-V DDC storage with stack-based handling. Improved build/test infrastructure and code maintenance, modernized ARM64 assembly, and refined interposition for fcntl. Cheribuild expanded Morello FPGA support in the build system (subsequently reverted from the cheribsd-mfs-root-kernel pipeline) and restored kernel entropy collection by removing the kern.random.harvest.mask override to ensure RNG entropy.

January 2025: Delivered targeted CHERI tooling and bootstrap stabilizations to improve development velocity and release readiness. Implemented tooling enhancements to better analyze CHERI-related code and stabilized bootstrapping on aarch64/cheri by adjusting the style checker and build system behavior. These changes reduce bootstrapping failures and enable more reliable cross-arch builds, contributing to smoother CI and faster iteration.

Month: 2024-12 — riscv/riscv-cheri: CHERI HS-mode exception registers documentation correction. Updated docs to reflect correct registers used for HS-mode exceptions (stval/stval2) instead of htval/htval2, and clarified HS-mode exception handling behavior. This change was landed via commit a7ab1b241d8d67f60b14da178ca961d28712e986 with message 'Use stval/stval2 for HS-mode exceptions, not htval/htval2 (#483)'.

In November 2024, focused on stabilizing and enabling EL2 architecture features in the acidanthera/audk repository. Consolidated changes to define CPTR_EL2 configuration constants, fixed RES1 handling and trap behavior, renamed CPACR constant for clearer feature enablement, and documented EL2 entry assumptions. These efforts reduce risk when enabling hypervisor-related features and lay groundwork for future EL2 enhancements.