latex3/latex2e
Oct 2024 – May 2026
8 Months active
Languages Used
LaTeXTeXLuaYAML
Technical Skills
DocumentationLaTeXLaTeX DevelopmentTestingFont ManagementTypesetting
Marcel Fabian Krüger
PROFILE
Marcel Fabian Krüger
Contributed to the latex3/latex2e repository by developing features that enhance LaTeX’s font management, equation tagging, and documentation workflows. Work included building APIs for OpenType font mapping and global script font declarations, optimizing CI/CD pipelines with GitHub Actions and YAML, and improving equation alignment through LuaMML sockets. Applied LaTeX, Lua, and YAML to streamline document preparation, automate builds, and ensure accurate mathematical rendering. Addressed test reliability by aligning test suites with engine changes and expanded test coverage for new features. The approach emphasized maintainability, extensibility, and efficient resource usage, resulting in more robust document typesetting and developer workflows.
Overall Statistics
Feature vs Bugs
82%Features
Repository Contributions
21Total
Bugs
2
Commits
21
Features
9
Lines of code
4,692
Activity Months8
Your Network
12 peopleWork History
May 2026
1 Commits • 1 Features
May 1, 2026May 2026 monthly summary for latex3/latex2e: Delivered LaTeX equation tagging enhancements with LuaMML sockets for eqnarray and fleqn support, plus expanded test coverage to validate behavior. These changes improve tagging accuracy, equation alignment flexibility, and regression safety, contributing to more reliable document rendering and downstream tooling.
1 Commits • 1 Features
May 1, 2026May 2026 monthly summary for latex3/latex2e: Delivered LaTeX equation tagging enhancements with LuaMML sockets for eqnarray and fleqn support, plus expanded test coverage to validate behavior. These changes improve tagging accuracy, equation alignment flexibility, and regression safety, contributing to more reliable document rendering and downstream tooling.
May 2026
March 2026
2 Commits
Mar 1, 2026March 2026 — latex3/latex2e: Aligned rendering tests with current engine behavior by regenerating testfiles to reflect rendering changes (infinite glue shrinkage, font descriptor lengths, and italic correction handling in LuaTeX). Prepared a decision path for italic correction changes, including potential revert if engine behavior improves. This work reduces release risk, improves test reliability, and strengthens layout/typography fidelity.
March 2026
2 Commits
Mar 1, 2026March 2026 — latex3/latex2e: Aligned rendering tests with current engine behavior by regenerating testfiles to reflect rendering changes (infinite glue shrinkage, font descriptor lengths, and italic correction handling in LuaTeX). Prepared a decision path for italic correction changes, including potential revert if engine behavior improves. This work reduces release risk, improves test reliability, and strengthens layout/typography fidelity.
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 (latex3/latex2e): Implemented CI/CD workflow optimization by restricting GitHub Actions runs to the main and develop branches, reducing unnecessary CI/CD executions and cutting resource usage. No major bugs fixed this month for latex2e. Change delivered via commit 0a4c6243546f0e5cb08c55842ef5062d9cf3c4f3 with message 'Skip actions on non-main branches'. Overall impact includes faster feedback on core branches, lower cloud compute costs, and clearer CI signals for main development lines. Technologies/skills demonstrated include GitHub Actions, YAML-based workflow configuration, and branch-scoped CI triggers with cost-aware DevOps practices.
1 Commits • 1 Features
Feb 1, 2026February 2026 (latex3/latex2e): Implemented CI/CD workflow optimization by restricting GitHub Actions runs to the main and develop branches, reducing unnecessary CI/CD executions and cutting resource usage. No major bugs fixed this month for latex2e. Change delivered via commit 0a4c6243546f0e5cb08c55842ef5062d9cf3c4f3 with message 'Skip actions on non-main branches'. Overall impact includes faster feedback on core branches, lower cloud compute costs, and clearer CI signals for main development lines. Technologies/skills demonstrated include GitHub Actions, YAML-based workflow configuration, and branch-scoped CI triggers with cost-aware DevOps practices.
February 2026
January 2026
2 Commits • 1 Features
Jan 1, 20262026-01 monthly summary for latex3/latex2e: Delivered globalized DeclareMathScriptfontMapping across documents, enabling script font mappings to be reusable and consistent. Updated tests to ensure compatibility and rendering accuracy with the new global mappings. Contributions landed in latex3/latex2e with two commits for globalizing mappings and test updates.
January 2026
2 Commits • 1 Features
Jan 1, 20262026-01 monthly summary for latex3/latex2e: Delivered globalized DeclareMathScriptfontMapping across documents, enabling script font mappings to be reusable and consistent. Updated tests to ensure compatibility and rendering accuracy with the new global mappings. Contributions landed in latex3/latex2e with two commits for globalizing mappings and test updates.
July 2025
4 Commits • 2 Features
Jul 1, 20252025-07 monthly summary for latex3/latex2e focusing on business value and technical achievements. This month delivered a new OpenType font mapping API and enhanced font handling, along with a refined CI/CD workflow that enables fail-fast behavior for GitHub Actions. The changes improve user-facing font selection, API clarity, and developer productivity through faster, more reliable rebuilds after failures.
4 Commits • 2 Features
Jul 1, 20252025-07 monthly summary for latex3/latex2e focusing on business value and technical achievements. This month delivered a new OpenType font mapping API and enhanced font handling, along with a refined CI/CD workflow that enables fail-fast behavior for GitHub Actions. The changes improve user-facing font selection, API clarity, and developer productivity through faster, more reliable rebuilds after failures.
July 2025
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 performance summary for latex3/latex2e: Focused on CI/documentation workflow optimization, LaTeX math processing enhancements, and output robustness. Key work includes refactoring the documentation build to run module-specific GitHub Actions with environment-aware artifacts and dynamic configuration, introducing script font mappings for math fonts to improve OpenType compatibility, and tightening the MathML output by suppressing inner expressions. These changes reduce build times, improve rendering fidelity, and strengthen test coverage, delivering tangible business value in documentation reliability, typography accuracy, and maintainability.
June 2025
3 Commits • 2 Features
Jun 1, 2025June 2025 performance summary for latex3/latex2e: Focused on CI/documentation workflow optimization, LaTeX math processing enhancements, and output robustness. Key work includes refactoring the documentation build to run module-specific GitHub Actions with environment-aware artifacts and dynamic configuration, introducing script font mappings for math fonts to improve OpenType compatibility, and tightening the MathML output by suppressing inner expressions. These changes reduce build times, improve rendering fidelity, and strengthen test coverage, delivering tangible business value in documentation reliability, typography accuracy, and maintainability.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025: Focused on enhancing typography flexibility in latex2e. Implemented font family replacement for script fonts and scriptscript fonts via new macros, enabling custom font mappings for subscripts and sub-scripts. This lays groundwork for richer, consistent typography across document types and scripts, improving authoring experience and output quality. No major bug fixes were reported this month; maintenance and small compatibility tweaks were performed as needed. The work reinforces latex3/latex2e's commitment to extensibility and user control over font rendering.
1 Commits • 1 Features
Apr 1, 2025April 2025: Focused on enhancing typography flexibility in latex2e. Implemented font family replacement for script fonts and scriptscript fonts via new macros, enabling custom font mappings for subscripts and sub-scripts. This lays groundwork for richer, consistent typography across document types and scripts, improving authoring experience and output quality. No major bug fixes were reported this month; maintenance and small compatibility tweaks were performed as needed. The work reinforces latex3/latex2e's commitment to extensibility and user control over font rendering.
April 2025
October 2024
7 Commits • 1 Features
Oct 1, 2024October 2024 focused on delivering the Tagging sockets feature for latex3/latex2e, expanding usage scenarios and preserving the second argument when tagging sockets are disabled, while enabling expandable internal plug definitions. This work also encompassed documentation updates, test improvements, and release-notes preparation to communicate capabilities clearly to users and contributors.
October 2024
7 Commits • 1 Features
Oct 1, 2024October 2024 focused on delivering the Tagging sockets feature for latex3/latex2e, expanding usage scenarios and preserving the second argument when tagging sockets are disabled, while enabling expandable internal plug definitions. This work also encompassed documentation updates, test improvements, and release-notes preparation to communicate capabilities clearly to users and contributors.
Activity
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Quality Metrics
Correctness86.6%
Maintainability86.6%
Architecture84.8%
Performance81.0%
AI Usage21.0%
Skills & Technologies
Programming Languages
LaTeXLuaTeXYAML
Technical Skills
Build AutomationCI/CDDevOpsDocument FormattingDocument PreparationDocumentationFont ManagementGitHub ActionsLaTeXLaTeX DevelopmentLua ScriptingMathematicsPDF generationTestingText formatting
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