endeve/thornado
Nov 2024 – Aug 2025
7 Months active
Languages Used
FortranMakefileYAMLGit
Technical Skills
Build System ConfigurationCI/CDDebuggingGitHub ActionsComputational PhysicsGPU Computing
Harris, Austin
PROFILE
Harris, Austin
James Harris contributed to the endeve/thornado repository by developing and refining high-performance scientific computing workflows, focusing on mesh refinement, build system optimization, and GPU-accelerated physics modules. He unified mesh refinement interfaces, enhanced test infrastructure, and improved build reliability through Makefile refactoring and CI workflow stabilization. Using Fortran, Makefile, and OpenMP, James implemented GPU acceleration for computational kernels and introduced flexible configuration options to support diverse development environments, including macOS. His work addressed both feature development and bug resolution, resulting in more maintainable code, reproducible builds, and robust numerical methods. The depth of his contributions improved both developer experience and simulation accuracy.
Overall Statistics
Feature vs Bugs
60%Features
Repository Contributions
32Total
Bugs
6
Commits
32
Features
9
Lines of code
3,524
Activity Months7
Your Network
61 people
Work History
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025 – Endeve/thornado: Build System Cleanup delivering faster, more reliable builds by optimizing Git info retrieval and removing VERSION_FLAGS from compiler flags. Standardizes Git metadata usage across Makefiles with a focused refactor to streamline development and CI workflows.
1 Commits • 1 Features
Aug 1, 2025August 2025 – Endeve/thornado: Build System Cleanup delivering faster, more reliable builds by optimizing Git info retrieval and removing VERSION_FLAGS from compiler flags. Standardizes Git metadata usage across Makefiles with a focused refactor to streamline development and CI workflows.
August 2025
June 2025
4 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for endeve/thornado: Focused on unifying mesh refinement workflows and improving developer onboarding. Key deliverables: 1) Mesh Refinement Interface and Configurability: standardize U_Fine across SIMPLE and CURVILINEAR MeshRefinement, add a test-level UseSimpleMeshRefinement flag, and make CoordinateSystem optional in initialization to enhance flexibility. Implemented through commits 35efc28d827a844862b78122c5c88f45cbc6fd2c; 63f7c4abb76335e960169084c9a9af73d853104a; and 9519d8bf11459bc4a8c5890eed2a99a1beca7614. 2) Mac-Specific Build Configuration: introduced a MacBook-specific Makefile (jaharris) to streamline building on macOS, including compiler flags and include/library paths for C, Fortran, and potential parallel libraries, improving developer onboarding and environment consistency. Commit 7b86e2e07328e30856894eb5e1a8573aa4f71f01.
June 2025
4 Commits • 2 Features
Jun 1, 2025June 2025 monthly summary for endeve/thornado: Focused on unifying mesh refinement workflows and improving developer onboarding. Key deliverables: 1) Mesh Refinement Interface and Configurability: standardize U_Fine across SIMPLE and CURVILINEAR MeshRefinement, add a test-level UseSimpleMeshRefinement flag, and make CoordinateSystem optional in initialization to enhance flexibility. Implemented through commits 35efc28d827a844862b78122c5c88f45cbc6fd2c; 63f7c4abb76335e960169084c9a9af73d853104a; and 9519d8bf11459bc4a8c5890eed2a99a1beca7614. 2) Mac-Specific Build Configuration: introduced a MacBook-specific Makefile (jaharris) to streamline building on macOS, including compiler flags and include/library paths for C, Fortran, and potential parallel libraries, improving developer onboarding and environment consistency. Commit 7b86e2e07328e30856894eb5e1a8573aa4f71f01.
May 2025
16 Commits • 2 Features
May 1, 2025May 2025 delivered a robust set of build, test, and mesh-refinement enhancements for endeve/thornado, resulting in stronger CI reliability, improved numerical stability, and greater feature flexibility. The work focused on consolidating the build system and test infrastructure, expanding mesh refinement capabilities, and tightening test accuracy, with a concrete emphasis on business value and production readiness.
16 Commits • 2 Features
May 1, 2025May 2025 delivered a robust set of build, test, and mesh-refinement enhancements for endeve/thornado, resulting in stronger CI reliability, improved numerical stability, and greater feature flexibility. The work focused on consolidating the build system and test infrastructure, expanding mesh refinement capabilities, and tightening test accuracy, with a concrete emphasis on business value and production readiness.
May 2025
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for endeve/thornado. This period focused on improving the Subcell Reconstruction pathway and stabilizing the build to enhance reliability and maintainability. Key feature delivered: Subcell Reconstruction Improvement with geometric scale factors in ProjectionMatrix, replacing the previous SqrtGm approach to increase accuracy and consistency with scale-based reconstruction. Major bug fix: resolved build-time and run-time issues by correcting module dependencies and enforcing build order so GeometryComputationModule.o is compiled before SubcellReconstructionModule.o, supported by an updated Makefile dependency. Overall impact: higher fidelity subcell reconstructions, fewer build/run failures, and a clearer, more maintainable path for future development. Technologies/skills demonstrated: C++ development, geometric algorithm integration, build-system optimization (Makefile), and effective debugging and dependency management.
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for endeve/thornado. This period focused on improving the Subcell Reconstruction pathway and stabilizing the build to enhance reliability and maintainability. Key feature delivered: Subcell Reconstruction Improvement with geometric scale factors in ProjectionMatrix, replacing the previous SqrtGm approach to increase accuracy and consistency with scale-based reconstruction. Major bug fix: resolved build-time and run-time issues by correcting module dependencies and enforcing build order so GeometryComputationModule.o is compiled before SubcellReconstructionModule.o, supported by an updated Makefile dependency. Overall impact: higher fidelity subcell reconstructions, fewer build/run failures, and a clearer, more maintainable path for future development. Technologies/skills demonstrated: C++ development, geometric algorithm integration, build-system optimization (Makefile), and effective debugging and dependency management.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 summary for endeve/thornado focused on repository hygiene and physics compute performance. Delivered a bug fix to prevent accidental commits of generated data by ignoring .dat files, and a feature enhancement to the NeutrinoOpacities driver to compute 0th and 1st moments for Iso with timing instrumentation. These changes reduce version-history noise, improve data governance, and enable measurable performance profiling for critical physics computations.
2 Commits • 1 Features
Mar 1, 2025March 2025 summary for endeve/thornado focused on repository hygiene and physics compute performance. Delivered a bug fix to prevent accidental commits of generated data by ignoring .dat files, and a feature enhancement to the NeutrinoOpacities driver to compute 0th and 1st moments for Iso with timing instrumentation. These changes reduce version-history noise, improve data governance, and enable measurable performance profiling for critical physics computations.
March 2025
January 2025
3 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for endeve/thornado. Delivered high-value features focused on performance and maintainability, with clear path for future optimizations. No explicit bugs recorded in the provided data window; work concentrated on GPU-accelerated computations and scalar-path refactoring to improve throughput and code clarity.
January 2025
3 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for endeve/thornado. Delivered high-value features focused on performance and maintainability, with clear path for future optimizations. No explicit bugs recorded in the provided data window; work concentrated on GPU-accelerated computations and scalar-path refactoring to improve throughput and code clarity.
November 2024
3 Commits
Nov 1, 2024November 2024 (endeve/thornado): CI workflow stabilization and build/test restoration, coupled with reverting debugging changes to restore reproducible behavior. Focused improvements to the Ubuntu-latest GNU workflow and external dependency setup, establishing a stable baseline for future feature work while reducing build/test flakiness.
3 Commits
Nov 1, 2024November 2024 (endeve/thornado): CI workflow stabilization and build/test restoration, coupled with reverting debugging changes to restore reproducible behavior. Focused improvements to the Ubuntu-latest GNU workflow and external dependency setup, establishing a stable baseline for future feature work while reducing build/test flakiness.
November 2024
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Quality Metrics
Correctness85.0%
Maintainability83.0%
Architecture79.0%
Performance73.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
FortranGitMakefileYAML
Technical Skills
Astrophysical SimulationsBuild ProcessBuild SystemBuild System ConfigurationBuild SystemsCI/CDCode RefactoringCode ReversionCompiler ConfigurationComputational PhysicsDebuggingFinite Element MethodFortran DevelopmentFortran ProgrammingGPU Computing
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