Summary for 2025-09 focusing on key features delivered, major fixes, and business impact. Delivered a Multiscale preconditioner with MsRSB to enhance solver performance for complex problems. This work included new infrastructure for mesh level management, partitioning, and preconditioner construction, along with updates to linear algebra and mesh utilities to enable scalable multiscale solving. The commit 27003264ee81adb4a734c53cd606d970bfcd2f04 documents the feature introduction. Business value includes faster convergence on large-scale simulations, improved solver robustness, and a scalable foundation for future performance enhancements.

Month: 2025-08 — Focused on delivering robust numerical capabilities in GEOS and tightening build reproducibility across dependent components. The work emphasizes business value through more accurate simulations, faster solvers, and reliable deployments.

May 2025: Delivered a full migration of the Scotch library build in GEOS-DEV/thirdPartyLibs from a Makefile-centric workflow to CMake (v7.0.7), and integrated it as an external project within the main build. Updated Spack packaging to align with the new CMake-based workflow, ensuring consistent builds across environments and simplifying downstream usage. The changes are anchored to commit 2931cbda3ccfdd4789d5cd3aa93ecf8633f3fbd1 and establish a maintainable, reproducible build foundation for future dependencies.