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Michael Stummvoll

PROFILE

Michael Stummvoll

Worked on the Staffbase/gha-workflows repository to enhance the reliability and efficiency of continuous integration pipelines. Focused on stabilizing flaky test detection by updating the flaky-tests GitHub Action version, refining workflow permissions, and migrating the CI environment from ubuntu-slim to ubuntu-latest. These targeted YAML and GitHub Actions workflow changes reduced false negatives, improved feedback speed for pull requests, and minimized manual intervention during CI runs. Demonstrated skills in CI/CD, DevOps, and permissions management while prioritizing risk mitigation and rollback strategies. The work resulted in more robust automated validations and a smoother developer experience within the Staffbase/gha-workflows project.

Overall Statistics

Feature vs Bugs

33%Features

Repository Contributions

3Total
Bugs
2
Commits
3
Features
1
Lines of code
5
Activity Months3

Your Network

16 people

Shared Repositories

16

Work History

April 2026

1 Commits • 1 Features

Apr 1, 2026

April 2026 monthly summary for Staffbase/gha-workflows: Stabilized CI for flaky tests by updating the workflow to a more stable Ubuntu image, improving reliability and feedback speed. Delivered a targeted fix that replaces ubuntu-slim with ubuntu-latest in the flaky tests workflow, reducing false negatives and enabling faster PR validation.

March 2026

1 Commits

Mar 1, 2026

In March 2026, delivered a targeted fix in Staffbase/gha-workflows to resolve read permission gaps in the flaky tests workflow. This enables the workflow to access required contents for identifying flaky tests, improving test reliability and CI feedback. The change, implemented via commit 64183f3ba38071274922025636282559d64ce946 (Add permissions for contents in flaky tests workflow (#407)), reduced false negatives in flaky-test detection and accelerated triage. Impact: more robust flaky test detection, smoother CI runs, and fewer manual interventions. Technologies/skills demonstrated include Git, GitHub Actions workflow configurations, and permissions management.

September 2025

1 Commits

Sep 1, 2025

September 2025: Stabilized CI for Staffbase/gha-workflows by updating the flaky-tests GitHub Action to 0.3.1 within the workflow configuration. This targeted, non-invasive change reduces flaky test occurrences in CI, shortens feedback loops for pull requests, and improves overall reliability of automated validations without touching production code.

Activity

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Quality Metrics

Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

YAML

Technical Skills

CI/CDDevOpsGitHub Actions

Repositories Contributed To

1 repo

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

Staffbase/gha-workflows

Sep 2025 Apr 2026
3 Months active

Languages Used

YAML

Technical Skills

GitHub ActionsCI/CDDevOps