boutproject/hermes-3
Feb 2025 – Mar 2026
9 Months active
Languages Used
C++CMakeScriptDoxygenPythonRSTTextrstBOUT++
Technical Skills
Bug FixC++C++ DevelopmentCode IntegrationCode RefactoringComputational Physics
Mike Kryjak
PROFILE
Mike Kryjak
Worked on the boutproject/hermes-3 repository, delivering core simulation features and stability improvements for plasma physics modeling. Over nine months, contributed C++ and Python code to implement advanced boundary conditions, diagnostics, and energy accounting, while refactoring modules for maintainability and performance. Enhanced test coverage and CI integration, enabling faster, more reliable releases. Improved documentation using Doxygen and reStructuredText, streamlining onboarding and clarifying configuration for users. Addressed numerical correctness in conduction and viscosity, optimized collision handling, and expanded automated testing for 1D and 2D workflows. The work emphasized reproducibility, code quality, and robust scientific computing practices across the development lifecycle.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
144Total
Bugs
20
Commits
144
Features
32
Lines of code
242,971
Activity Months9
Your Network
11 peopleShared Repositories
11
Work History
March 2026
4 Commits • 1 Features
Mar 1, 2026For 2026-03, delivered key enhancements to the 2D Production and Recycling test suite in boutproject/hermes-3, improving sensitivity, speed, and debugging efficiency, and aligned test expectations with the HCX refactor. These changes reduce debugging time, increase confidence in CI results, and support faster release cycles through more reliable test automation.
4 Commits • 1 Features
Mar 1, 2026For 2026-03, delivered key enhancements to the 2D Production and Recycling test suite in boutproject/hermes-3, improving sensitivity, speed, and debugging efficiency, and aligned test expectations with the HCX refactor. These changes reduce debugging time, increase confidence in CI results, and support faster release cycles through more reliable test automation.
March 2026
February 2026
29 Commits • 8 Features
Feb 1, 2026February 2026 monthly summary for boutproject/hermes-3: Delivered code quality and feature work across the codebase, with a strong emphasis on maintainability, correctness, and test coverage. Key features and improvements include formatting cleanup, gamma_i extraction, improved upper boundary handling in recycling, and expanded testing/docs for recycling and neutral_mixed. Also advanced unit tests and documentation for 2D recycling, nonorthogonal operators, target pump behavior, and related test fixes; coupled with targeted test/debug cleanup and a major reorganization of the turbulence example. Business value centers on more reliable simulations, easier maintenance, and faster onboarding for new contributors, while technical accomplishments demonstrate robust refactoring, physics enhancements, and rigorous validation. Key achievements include the following delivered items and refactors: - Code formatting cleanup across the codebase (clang-format) — commits 4163955ee9fcdaf5e96decd3085c9396551338c3, 3e66995d8cd26e3a30c38f1bfe1776bfa7cafdb2, 429011d67dc4035bf5a4afb77c4eea6b487ce39c, ca4308f9e382597be5f9cc31bb79ed5ca1de9d9e. - Gamma_i extraction logic implemented — commit d1cb01d0ff848de45ab939e11b7d00bbc988745a. - Upper boundary handling refactor in recycling modules — commits eac6813098dafbf28e4d142563abbf237cb0672a, c9b4970190f3547903866843eeca37965f079f5c. - Recycling path correctness fixes (indexing/flux/right removals) — commits 8116c9b7384c26902db6e2450519f0014ca1813a, db69a9a52cfa593ce2f818ccff6be551b7da219d, a1e444d780699f583f02a1b5f20f5cd54f2aacd3. - Expanded tests and docs for recycling and neutr al_mixed (2D recycling tests, unit tests, and documentation enhancements) — commits 332b7a1a405d640ae120961f00d7863a604f2f68, 4df68898743e9755379e444fdfcdf19f5be04cbb, f88c71a0f217323b845b4f661af97902325e64f9, 2496efd137e8fd6b7538c7729e24643ed31a14eb, 5b27fabbc9f1a2835175558fd49ee91d6e40bc3a, a1eae940826001369b41d11ef1f31b0f33442fca, 8b5120a40e84c485c8ae1d2be3b98a0e5e4ff33b, b613f889104eb6aa369335dd52dac2f1961eb90e, 0a2b4049bdbe6e59cb6f6966930e3563dbfe0aa4. - Nonorthogonal operators in neutral_mixed with unit tests — commits cc8ca1a4a4b7e83f2e73ae9bfd56d621659b61fa, 2faeb96fc910335b13997cc1dedcd32e7878c034, dac41aece106f0f3417459d716b56f7d735abb5a. - Target pump unit test — commit e77610e44ae8b60a75c265bcf9b2d230ca0cc363. - Time derivative/RHS test fixes and cleanup (tests updated, debug variable removal) — commits 84d7f62bb0181673353475453b9161fb96fc23fa, 11b15ee60012cea19d1f3a7a6e526500dbcf6fa1, 1d3543203b7100e3d8ebba7da2b3f6074deaa68e, 48fb6c1d1db6373d7c678541a30eb5edfe343118. - Turbulence example relocation and sheath_closure typo fix — commits 42615f96179a69dc43cceb8a580ae73438ca6fd0, 8e82168d00912b5a3ef0c58c1881d8b0dae54ddc.
February 2026
29 Commits • 8 Features
Feb 1, 2026February 2026 monthly summary for boutproject/hermes-3: Delivered code quality and feature work across the codebase, with a strong emphasis on maintainability, correctness, and test coverage. Key features and improvements include formatting cleanup, gamma_i extraction, improved upper boundary handling in recycling, and expanded testing/docs for recycling and neutral_mixed. Also advanced unit tests and documentation for 2D recycling, nonorthogonal operators, target pump behavior, and related test fixes; coupled with targeted test/debug cleanup and a major reorganization of the turbulence example. Business value centers on more reliable simulations, easier maintenance, and faster onboarding for new contributors, while technical accomplishments demonstrate robust refactoring, physics enhancements, and rigorous validation. Key achievements include the following delivered items and refactors: - Code formatting cleanup across the codebase (clang-format) — commits 4163955ee9fcdaf5e96decd3085c9396551338c3, 3e66995d8cd26e3a30c38f1bfe1776bfa7cafdb2, 429011d67dc4035bf5a4afb77c4eea6b487ce39c, ca4308f9e382597be5f9cc31bb79ed5ca1de9d9e. - Gamma_i extraction logic implemented — commit d1cb01d0ff848de45ab939e11b7d00bbc988745a. - Upper boundary handling refactor in recycling modules — commits eac6813098dafbf28e4d142563abbf237cb0672a, c9b4970190f3547903866843eeca37965f079f5c. - Recycling path correctness fixes (indexing/flux/right removals) — commits 8116c9b7384c26902db6e2450519f0014ca1813a, db69a9a52cfa593ce2f818ccff6be551b7da219d, a1e444d780699f583f02a1b5f20f5cd54f2aacd3. - Expanded tests and docs for recycling and neutr al_mixed (2D recycling tests, unit tests, and documentation enhancements) — commits 332b7a1a405d640ae120961f00d7863a604f2f68, 4df68898743e9755379e444fdfcdf19f5be04cbb, f88c71a0f217323b845b4f661af97902325e64f9, 2496efd137e8fd6b7538c7729e24643ed31a14eb, 5b27fabbc9f1a2835175558fd49ee91d6e40bc3a, a1eae940826001369b41d11ef1f31b0f33442fca, 8b5120a40e84c485c8ae1d2be3b98a0e5e4ff33b, b613f889104eb6aa369335dd52dac2f1961eb90e, 0a2b4049bdbe6e59cb6f6966930e3563dbfe0aa4. - Nonorthogonal operators in neutral_mixed with unit tests — commits cc8ca1a4a4b7e83f2e73ae9bfd56d621659b61fa, 2faeb96fc910335b13997cc1dedcd32e7878c034, dac41aece106f0f3417459d716b56f7d735abb5a. - Target pump unit test — commit e77610e44ae8b60a75c265bcf9b2d230ca0cc363. - Time derivative/RHS test fixes and cleanup (tests updated, debug variable removal) — commits 84d7f62bb0181673353475453b9161fb96fc23fa, 11b15ee60012cea19d1f3a7a6e526500dbcf6fa1, 1d3543203b7100e3d8ebba7da2b3f6074deaa68e, 48fb6c1d1db6373d7c678541a30eb5edfe343118. - Turbulence example relocation and sheath_closure typo fix — commits 42615f96179a69dc43cceb8a580ae73438ca6fd0, 8e82168d00912b5a3ef0c58c1881d8b0dae54ddc.
January 2026
23 Commits • 8 Features
Jan 1, 20262026-01 monthly summary for boutproject/hermes-3 focused on delivering core functionality, stabilizing the solver, expanding automated testing, and improving documentation and testing workflows. The month combined significant core deliverables with governance and reliability improvements to support faster, safer releases.
23 Commits • 8 Features
Jan 1, 20262026-01 monthly summary for boutproject/hermes-3 focused on delivering core functionality, stabilizing the solver, expanding automated testing, and improving documentation and testing workflows. The month combined significant core deliverables with governance and reliability improvements to support faster, safer releases.
January 2026
October 2025
7 Commits • 2 Features
Oct 1, 2025October 2025 performance summary for boutproject/hermes-3: Delivered feature enhancements in collision handling and species identification with a focus on correctness, testability, and performance. Implemented per-species collision tracking, added collision-frequency tests, and CI-friendly configurations; refactored identifySpeciesType to enum-based approach and introduced caching to speed up repeated lookups. Addressed critical bug fixes, improved CI stability, and produced measurable improvements in simulation fidelity and runtime efficiency.
October 2025
7 Commits • 2 Features
Oct 1, 2025October 2025 performance summary for boutproject/hermes-3: Delivered feature enhancements in collision handling and species identification with a focus on correctness, testability, and performance. Implemented per-species collision tracking, added collision-frequency tests, and CI-friendly configurations; refactored identifySpeciesType to enum-based approach and introduced caching to speed up repeated lookups. Addressed critical bug fixes, improved CI stability, and produced measurable improvements in simulation fidelity and runtime efficiency.
August 2025
9 Commits • 1 Features
Aug 1, 2025August 2025: Implemented diagnostics and physics fidelity upgrades in Hermes-3 with focused numerical fixes to improve energy accounting, stability, and reproducibility. Delivered enhanced observability for energy and momentum transfer, corrected several physics calculations, and updated documentation to support ongoing development and validation.
9 Commits • 1 Features
Aug 1, 2025August 2025: Implemented diagnostics and physics fidelity upgrades in Hermes-3 with focused numerical fixes to improve energy accounting, stability, and reproducibility. Delivered enhanced observability for energy and momentum transfer, corrected several physics calculations, and updated documentation to support ongoing development and validation.
August 2025
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025 focused on improving Hermes-3 usability and maintainability. Documentation enhancements clarified collision frequency modes for conduction, viscosity, and diffusion, including default settings, usage guidance, and configuration examples to help users apply the model correctly. A targeted code cleanup removed an unused diagnostic for parallel heat conduction divergence, reducing code complexity and output surface. These changes strengthen onboarding, reduce support questions, and streamline future enhancements by making configuration and behavior more predictable for users and contributors.
June 2025
3 Commits • 1 Features
Jun 1, 2025June 2025 focused on improving Hermes-3 usability and maintainability. Documentation enhancements clarified collision frequency modes for conduction, viscosity, and diffusion, including default settings, usage guidance, and configuration examples to help users apply the model correctly. A targeted code cleanup removed an unused diagnostic for parallel heat conduction divergence, reducing code complexity and output surface. These changes strengthen onboarding, reduce support questions, and streamline future enhancements by making configuration and behavior more predictable for users and contributors.
April 2025
41 Commits • 5 Features
Apr 1, 2025April 2025 for boutproject/hermes-3 focused on stability, robustness, and documentation. Key features delivered include updated energy density floor alignment (1e-7) and improved neutral pump boundary handling, along with a refactor of boundary code and added diagnostics. Major bugs fixed improved correctness and reliability in conduction diagnostics, IdentifySpeciesType resolution, pump/recycling error paths, and log cleanliness. A sweeping documentation overhaul enhanced onboarding and maintainability across Examples, Equations, Developer Manual, and Diagnostics, Grids, Tips, and Release Notes, with consolidation of CMake/Spack sections and new Solvers/Numerical Methods coverage. Technologies demonstrated include CMake/Spack awareness, Doxygen/Breathe-based docs, and improved boundary-condition modeling and diagnostics, all contributing to higher reliability, reproducibility, and faster onboarding.
41 Commits • 5 Features
Apr 1, 2025April 2025 for boutproject/hermes-3 focused on stability, robustness, and documentation. Key features delivered include updated energy density floor alignment (1e-7) and improved neutral pump boundary handling, along with a refactor of boundary code and added diagnostics. Major bugs fixed improved correctness and reliability in conduction diagnostics, IdentifySpeciesType resolution, pump/recycling error paths, and log cleanliness. A sweeping documentation overhaul enhanced onboarding and maintainability across Examples, Equations, Developer Manual, and Diagnostics, Grids, Tips, and Release Notes, with consolidation of CMake/Spack sections and new Solvers/Numerical Methods coverage. Technologies demonstrated include CMake/Spack awareness, Doxygen/Breathe-based docs, and improved boundary-condition modeling and diagnostics, all contributing to higher reliability, reproducibility, and faster onboarding.
April 2025
March 2025
10 Commits • 2 Features
Mar 1, 2025This month focused on delivering a new 1D SOL detachment-threshold simulation example for Hermes-3, stabilizing 1D recycling workflows, and improving documentation and onboarding. The work emphasizes increased fidelity, stability, and usability for SOL studies with clearer, shipshape project organization.
March 2025
10 Commits • 2 Features
Mar 1, 2025This month focused on delivering a new 1D SOL detachment-threshold simulation example for Hermes-3, stabilizing 1D recycling workflows, and improving documentation and onboarding. The work emphasizes increased fidelity, stability, and usability for SOL studies with clearer, shipshape project organization.
February 2025
18 Commits • 4 Features
Feb 1, 2025February 2025 — Hermes-3: Implemented core physics improvements, stabilized neutral transport, and modernized documentation to improve simulation fidelity and developer productivity. Key features delivered include a configurable core radiation suppression option and the integration of neutral advection into the main branch. Major bugs fixed include neutral_mixed segfaults and poloidal-flow diagnostic alignment, plus the correction of a missing 2/3 factor in parallel neutral conduction. Overall impact: more accurate physics, fewer flaky tests, and clearer documentation, enabling faster iteration and broader adoption. Technologies/skills demonstrated include code maintenance across core simulation components, diagnostics enhancement, and documentation tooling and theming.
18 Commits • 4 Features
Feb 1, 2025February 2025 — Hermes-3: Implemented core physics improvements, stabilized neutral transport, and modernized documentation to improve simulation fidelity and developer productivity. Key features delivered include a configurable core radiation suppression option and the integration of neutral advection into the main branch. Major bugs fixed include neutral_mixed segfaults and poloidal-flow diagnostic alignment, plus the correction of a missing 2/3 factor in parallel neutral conduction. Overall impact: more accurate physics, fewer flaky tests, and clearer documentation, enabling faster iteration and broader adoption. Technologies/skills demonstrated include code maintenance across core simulation components, diagnostics enhancement, and documentation tooling and theming.
February 2025
Activity
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Quality Metrics
Correctness93.6%
Maintainability92.6%
Architecture91.0%
Performance89.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
BOUT++BOUT.inpBashC++CMakeCMakeScriptCSSDoxygenFortranGit
Technical Skills
Bash scriptingBug FixC++C++ DevelopmentC++ developmentC++ programmingCI/CDCMakeCMakeLists ManagementCSSCode CleanupCode IntegrationCode MaintenanceCode OrganizationCode Refactoring
Repositories Contributed To
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