February 2026 monthly summary for ERGO-Code/HiGHS highlighting key feature work, bug fixes, and release-readiness activities. The month focused on stabilizing the build, improving cross-platform toolchain integration, and accelerating time-to-value through a clean packaging process and proactive release preparation.

January 2026 (2026-01) monthly summary for ERGO-Code/HiGHS: Delivered cross-architecture improvements and build/packaging stability across Linux, Windows, and ARM, enabling broader deployment and easier maintenance. Notable feature work includes architecture detection enhancements via parse_getarch, clearer dependency inspection for dynamic linking, and improved 32-bit/ARM path handling. Bug fixes addressed critical build and runtime issues, including Linux CMake flags propagation, ARM/AMD no_hipo option handling, and redefinition-related bugs, along with Skylake stability and Valgrind-related AVX512 toggles. The month also advanced testing, debugging, and release readiness with updated CTest conditions, HIPO testing on Ubuntu, and Windows packaging improvements. Overall impact: higher reliability, better cross-arch performance, and a stronger foundation for future optimizations; the work demonstrates deep expertise in CMake/build systems, cross-platform packaging, and performance tuning.

December 2025 HiGHS monthly summary: Key packaging improvements and cross-platform build enhancements targeted at reliable releases, reproducible tarballs, and faster feedback loops. Implemented tarball packaging and CPack workflow with HIP0 integration, expanded Linux/ARM and Windows support, streamlined Julia packaging, and strengthened CI automation. These changes reduced release friction, simplified dependency management, and improved build reliability across Linux, macOS, and Windows.

November 2025: Focused on repo hygiene and cross-platform build stability for HiGHS. Cleaned up accidental files and delivered Windows OpenBLAS support in CMake with smarter detection logic and optional vcpkg configuration, enabling reliable builds and faster onboarding for Windows developers.

October 2025 — HiGHS development focused on expanding language coverage, strengthening cross-platform CI and tooling, and hardening critical dependencies to enable faster, more reliable releases across Windows, macOS, and Linux. Key features delivered: - Fortran language support and build/test workflow: Adds explicit Fortran support to the fortrantest suite, configures build/test workflow, and validates compatibility across gfortran and multiple Fortran toolchains/versions. - Cross-platform CI workflows: Implemented Windows/Ubuntu/macOS CI pipelines, enabled bash shell, configured GitHub workspace, and fixed path handling to improve pipeline reliability. - Windows compatibility improvements: Patched METIS for local usage and introduced cygpath-based path handling to improve Windows parity. - BLAS/OpenBLAS integration and path resolution on macOS: Robust integration with static linking and prefix/path handling. - Install prefix support and private library linking: Added configurable install prefix and explicit private link to libraries; improved CBLAS exposure. - Testing and packaging enhancements: Added Valgrind flow, Python version tests, runner tests, Metis debugging tests, PyPI packaging tests/workflows, and documentation updates. Major bugs fixed: - CI/Runners maintenance and environment stabilization, including revert of macOS runner change and cleanup to master. - Disabling legacy CI tests to speed pipelines and remove deprecated checks. - Addressing path resolution and executable lookup issues; ensuring ROOT in search order. - Misc typos, and small fixes across workflows and installers. Overall impact and accomplishments: - Accelerated time-to-release through faster, more reliable CI across platforms. - More robust dependency management (BLAS/Metis/OpenBLAS, CBLAS) and language coverage (Fortran), enabling broader user scenarios. - Improved developer productivity via enhanced test coverage, packaging workflows, and better diagnostics. Technologies/skills demonstrated: - CI/CD (GitHub Actions), CMake, BLAS/OpenBLAS integration, METIS, Windows path handling, Fortran tooling, test infrastructure, Valgrind integration, Python packaging, documentation and workflow improvements.

September 2025 – Windows-focused modernization and test automation for HiGHS (ERGO-Code/HiGHS). Key outcomes: Windows build pipeline simplified and accelerated through vcpkg-based dependency management, CMake toolchain update, and removal of direct GKlib linking; enhanced Windows CI/CD with a new ALL_TESTS debugging workflow, vcpkg caching, and regression tests for both Debug and Release builds. Impact: more reliable Windows builds, faster dependency installation, broader test coverage, and improved cross-platform consistency. Skills demonstrated: vcpkg, CMake toolchain usage, Windows CI/CD, test automation, and Git-based change management.

August 2025 HiGHS development focused on robust, cross-platform packaging, build reliability, and CI efficiency for ERGO-Code/HiGHS. The month delivered a cohesive set of improvements that enable reliable distribution and simplified onboarding for users and contributors, while strengthening build integrity across Linux, macOS, and Windows.

2025-07 Monthly Summary: Delivered stability improvements and Python binding reliability for ERGO-Code/HiGHS. Key milestones include resource cleanup for the Highs global scheduler after API calls to prevent memory leaks and state corruption, and enhancements to the Python bindings build process (pybind11 now required; template depth option for non-MSVC toolchains) to improve reliability and usability. Overall impact: reduced memory risk in long-running workloads, smoother Python integration, and stronger cross-platform builds. Technologies/skills demonstrated: C++ resource management, pybind11-based bindings, and build tooling for cross-platform development. Business value: improved stability, faster onboarding for Python users, and lower maintenance burden.

June 2025 monthly summary: Implemented cross-repo upgrades for HiGHS 1.11.0 with build-system enhancements to ensure robust integration and maintainability. Delivered Bazel-related improvements in grpc/bazel-central-registry and updated the vcpkg Highs port, aligning dependencies and removing legacy patches to improve stability and platform compatibility. These changes reduce ongoing maintenance, improve build reliability, and enable smoother downstream integration for Bazel and vcpkg users.

Monthly summary for May 2025 focusing on the ERGO-Code/HiGHS repo. Highlights include feature delivery, test and CI improvements, and code robustness that collectively improve build reliability, developer productivity, and product quality.

April 2025 monthly summary focusing on delivering cross-platform reliability, improved build/deploy pipelines, and strengthened testing/validation for HiGHS. The work focused on sanitizers, build-system hardening, CI/testing enhancements, and packaging improvements to accelerate safe deployments and onboarding for users and contributors.

Monthly summary for 2025-03: grpc/bazel-central-registry — Delivered Highs Solver v1.10.0 integration into Bazel-central-registry with multi-platform build configurations, defining module dependencies and Bazel-version matrices to enable seamless building of the Highs library within Bazel.

February 2025 monthly summary for ERGO-Code/HiGHS: Focused on stabilizing CUDA builds and improving developer onboarding through enhanced NVIDIA driver and CUDA installation documentation. Implemented targeted fixes to reduce build warnings and ensure reliable CUDA integration, while expanding README guidance to streamline setup and troubleshooting for GPU workflows. Delivered through two commit groups: CUDA build system fixes and extensive README updates, totaling 2 commits and 5 commits respectively.

January 2025 monthly summary for grpc/bazel-central-registry: Delivered the HiGHS Maintainer Metadata Update by adding a maintainer field to MODULE.bazel to specify maintainer and contact information in the Bazel Central Registry. This work, tracked in commit 9514330d1ee9a5398d0cb6a0b1cbe68880a8be3b (PR #3531), enhances ownership visibility and improves issue triage for HiGHS-related updates.

December 2024 HiGHS monthly summary: Delivered cross‑platform packaging and CI improvements, stabilizing distribution workflows and accelerating release readiness. Work focused on sdist packaging integration, expanded test coverage across macOS/Linux/Windows, and enhancements to the CI/CD pipeline, with emphasis on reliability, reproducibility, and quality.

November 2024 performance summary: Key features delivered include GPU-accelerated PDLP Solver with CUDA integration and robust CI/CD enhancements culminating in HiGHS Release 1.8.1. The GPU path now includes CUDA kernels, cuBLAS/cuSPARSE initialization, GPU-aware data transfers, and GPU-enabled unit tests; CI/CD expanded with external test repositories and CUDA-enabled test linking, improving test coverage and release reliability. Stabilization work resolved CUDA build/test integration issues and ensured multi-repo tests run end-to-end, delivering measurable performance improvements for large-scale problems and faster, reliable releases.