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Johannes Schindelin

PROFILE

Johannes Schindelin

Johannes Schindelin contributed to the microsoft/git repository by enhancing CI/CD reliability and security, as well as improving cross-platform file handling. He integrated CodeQL static analysis into the CI pipeline using GitHub Actions and YAML, laying the foundation for multi-language code quality checks. Schindelin upgraded CI build agents to Ubuntu 22.04 and ensured consistent tooling across Fedora and AlmaLinux environments with Shell scripting, reducing build flakiness. He addressed a critical CI vulnerability by updating the setup-go action and improved Windows compatibility in C by extending symlink target support in strbuf_readlink. His work demonstrated depth in system programming and DevOps practices.

Overall Statistics

Feature vs Bugs

50%Features

Repository Contributions

6Total
Bugs
2
Commits
6
Features
2
Lines of code
122
Activity Months4

Work History

January 2026

1 Commits

Jan 1, 2026

January 2026 (2026-01) monthly summary for microsoft/git. Focused on enhancing cross-platform path handling and Windows compatibility for symlink operations. Delivered a targeted bug fix to strbuf_readlink to support long symlink targets beyond 2*PATH_MAX, hard-coding the limit to 32,767 characters to align with Windows path semantics and improve reliability.

November 2025

1 Commits

Nov 1, 2025

Month: 2025-11 — Microsoft Git collaboration: security hardening and CI reliability improvements. Delivered a targeted CI security fix by upgrading the setup-go action in the microsoft/git workflow, aligning with best practices and reducing risk exposure. The change addresses a critical vulnerability and improves CI performance and maintainability by incorporating dependency updates and clearer traceability. Commit context and rationale are captured in the associated PRs and release notes.

April 2025

2 Commits • 1 Features

Apr 1, 2025

April 2025: Focused CI reliability improvements for microsoft/git. Upgraded CI build agents to Ubuntu 22.04, adopted repository-supplied sparse package, and ensured gawk is installed across Fedora and AlmaLinux CI environments to prevent breakages from base-image updates. These changes reduce flaky builds and improve feedback times.

August 2022

2 Commits • 1 Features

Aug 1, 2022

Month: 2022-08 — Focused on embedding security and quality checks into the CI pipeline by integrating CodeQL static analysis for the microsoft/git project. Targeted C/C++ code via language: cpp and established groundwork for multi-language analysis with a matrix workflow. No major bug fixes this month; work centered on CI improvements and process modernization. Notable collaboration with co-authors Pierre Tempel and Arthur Baars; commits include cebcbfc166346e872d77db8932847cb20a268c64 and 5fa0b74381cba5ba889dfed626b9d314381d13d6.

Activity

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Quality Metrics

Correctness100.0%
Maintainability93.4%
Architecture93.4%
Performance93.4%
AI Usage20.0%

Skills & Technologies

Programming Languages

CShellYAML

Technical Skills

C programmingCI/CDDevOpsGitHub ActionsShell ScriptingStatic Analysisfile handlingsystem programming

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

microsoft/git

Aug 2022 Jan 2026
4 Months active

Languages Used

ShellYAMLC

Technical Skills

CI/CDGitHub ActionsStatic AnalysisDevOpsShell ScriptingC programming