latex3/latex2e
Oct 2024 – Mar 2026
7 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, document preparation, and CI/CD workflows. Delivered reusable script font mappings and introduced APIs for OpenType font selection, improving typography flexibility and consistency across documents. Refactored documentation builds using GitHub Actions and YAML, optimizing artifact handling and reducing unnecessary CI runs. Addressed rendering test alignment by updating test suites to match engine behavior, ensuring reliable output and reducing release risk. Applied skills in LaTeX, Lua, and build automation to streamline workflows, strengthen test coverage, and support maintainable, extensible document processing for both users and contributors.
Overall Statistics
Feature vs Bugs
80%Features
Repository Contributions
20Total
Bugs
2
Commits
20
Features
8
Lines of code
4,307
Activity Months7
Your Network
11 peopleWork History
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.
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
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.
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.
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.
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
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.
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.
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.
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
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.
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.
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.
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
Activity
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Quality Metrics
Correctness87.0%
Maintainability87.0%
Architecture85.0%
Performance81.0%
AI Usage21.0%
Skills & Technologies
Programming Languages
LaTeXLuaTeXYAML
Technical Skills
Build AutomationCI/CDDevOpsDocument FormattingDocument PreparationDocumentationFont ManagementGitHub ActionsLaTeXLaTeX DevelopmentLua ScriptingPDF generationTestingText formattingTypesetting
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