October 2025 milestone for ammarhakim/gkeyll focused on tooling consolidation, cross-platform build reliability, and Lua integration refactor. Delivered relocation of Lua tooling under the Gkeyll directory, centralized Lua code copying in the gkeyll Makefile, relocated the Lua Tool system under Gkeyll, and updated Makefile-gkeyll with a linker flag for symbol visibility. Removed Comm.Mpi usage from two Lua scripts as part of the refactor, and addressed a macOS Darwin linking issue by applying the -Wl,-E export flag to ensure the gkeyll executable links correctly on Darwin. These changes improve tooling consistency, build/install workflow, cross-platform compatibility, and reduce MPI-related fragility.

In September 2025, delivered a focused bug fix and refactor to improve Eqdsk data ingestion reliability for the gkeyll pipeline. The readHeader function in Lua eqdskreader.lua is now robust: it parses the header line by spaces and extracts nx and ny from the last two elements, correcting prior misparsing and reducing downstream errors. This change, linked to commit e36eebdf47efa2032625941d562f720a8f92ae38, enhances data integrity for simulations and automates the data processing workflow.

August 2025 monthly summary for ammarhakim/gkeyll: Implemented an app-targeted build system with per-app build flags and incremental Lua-based apps, plus a new cgkeyll executable to run C drivers via Tiny C Compiler (TCC). This includes integration of TCC into dependency installation and improved build-system reliability for app-specific configurations. Refined header management and editor tooling: amalgamated header installation, exclusion of kernel/private headers from public headers, and added editor metadata to Makefile-related files to improve maintainability and tooling support. Fixed CUDA tests by replacing the generic TEST_CHECK with GKYL_CU_CHECK to ensure correct error handling in CUDA kernels. Simplified build flow by removing an explicit install target and clarifying the make targets (e.g., make and make gkeyll-install), improving developer experience and cross-platform consistency.

July 2025 monthly summary for ammarhakim/gkeyll: Focused on stabilizing the build system to improve reliability and developer velocity. Implemented targeted fixes to the CPU build pathway by correcting Makefile include order and renaming the 'kernels' directory to 'ker', consolidating two commits into a cohesive reliability improvement. Preliminary validation shows CPU builds now complete; GPU build validation is pending. These changes reduce flaky builds, shorten iteration cycles, and lay groundwork for cross-architecture stability.

June 2025 monthly summary for ammarhakim/gkeyll. Key outcomes focused on laying groundwork for advanced numerical methods, stabilizing the build process, and improving test reliability. Major deliverables include DG geometry and quadrature groundwork, wave geometry fixes, and build-system hygiene that enable reliable, scalable development going forward. Key features delivered: - DG geometry and quadrature core: Started a new DG geometry object analogous to the wave geometry, with basic structs, surface and cell geometry at quadrature nodes, multi-dimensional quadrature support, and associated tests/accessors. Added quad weights, node locations, and multi-D weight/ords calculator tests. Added surface/volume quadrature nodes, weights, and accessors. - Build system improvements: Cleaned up Makefiles, added hierarchical build support, and introduced a new make everything target to build all code (unit, regressions, and the main executable). - Wave geometry fixes: Addressed unit-test signature changes, fixed include-order issues, and removed an unnecessary private header, improving test stability. - Code cleanup and build hygiene: Removed unused files and fixed core executable naming and timestamp drift in the Makefile to ensure consistent builds. - Test robustness: Fixed a Valgrind error in the reference counting unit test, improving test reliability and maintainability. Overall impact and accomplishments: - Accelerated path to high-order simulations by establishing DG geometry scaffolding and co-located quadrature data, enabling subsequent development and validation. - Significantly improved build reliability and reproducibility through hierarchical builds and a comprehensive all-build target, reducing time-to-build and risk of partial builds. - Enhanced software quality with test stability improvements and removal of stale code, lowering long-term maintenance costs. Technologies/skills demonstrated: - C/C++ development for geometric abstractions and quadrature routines - Build systems and Makefile refactoring, hierarchical builds, and automated full-build targets - Unit testing, test maintenance (including Valgrind debugging), and interface design for extensible geometry objects - Code cleanup, regression test discipline, and versioned commit storytelling for traceability

May 2025 monthly summary for ammarhakim/gkeyll focused on stabilizing runtime reliability, expanding mathematical capabilities, and advancing GK grid tooling. Key features delivered span numeric methods, grid generation, API usability, and debugging support. Major bug fixes and reliability improvements addressed memory management and MPI integration, while test coverage and observability were enhanced to support long-term maintainability.

March 2025 monthly summary for ammarhakim/gkeyll: Focused on advancing code maintainability, stability, and test reliability through targeted refactoring, memory management hardening, and lightweight improvements to testing and housekeeping. Key execution across features and bug fixes enabled more modular development and stronger validation for long-running simulations.

February 2025: Delivered new API surface to support symbolic differentiation and simplification within the gkylcas repository, improving testability and external access to core symbolic manipulation capabilities. This work lays groundwork for safer testing, easier integration with downstream tooling, and stronger future extensibility. No major bugs fixed this month; focus was on API delivery and repository readiness for future work.

Month 2025-01 focused on reliability, portability, and maintainability for the ammarhakim/gkeyll project. Delivered a robust fix to MPI_Comm handling across systems by introducing an indirection layer and passing MPI_Comm as light userdata from Lua to C, ensuring consistent behavior across MPI implementations. No new user-facing features this month; the primary business value is improved stability and portability for HPC runs.

December 2024 — Consolidated cross-application quality and developer tooling improvements for ammarhakim/gkeyll. Key outcomes include deterministic species name sorting across PKPM, Moment App, GK App, and Vlasov App; CLI-driven PKPM usage with per-app argument parsing; regression test maintenance and automation improvements; and build system standardization with portable tooling and metadata handling. These changes reduce flaky tests, streamline onboarding, and improve cross-app consistency and deployment portability across platforms.

2024-11 Monthly Summary — ammarhakim/gkeyll: Focused on aligning the Lua/G2 integration with unified G0/G2 tooling, expanding regression/test infrastructure, and laying foundations for scalable, testable workflows. Delivered user-facing output improvements, regression data pipelines, and core infrastructure to support future physics and tool integrations. Business value centers on reliable testing, faster iteration, and consistent cross-project behavior while advancing coupling between Lua-based apps and the Gkyl execution environment.