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Corey Hemminger

PROFILE

Corey Hemminger

Over 11 months, Hemminger engineered robust CI/CD pipelines and testing infrastructure across the chef/chef and chef/chef-test-kitchen-enterprise repositories, focusing on automation, reliability, and maintainability. He modernized build and provisioning workflows, introduced modular Ruby gem architectures, and streamlined Docker image pipelines using Ruby, Bash, and YAML. His work included expanding test coverage, stabilizing integration with tools like Vagrant and Dokken, and implementing security-conscious dependency and licensing management. By optimizing configuration management and automating repetitive tasks, Hemminger reduced maintenance overhead and improved release velocity, demonstrating depth in DevOps, infrastructure as code, and backend development while enabling scalable, compliant software delivery.

Overall Statistics

Feature vs Bugs

71%Features

Repository Contributions

122Total
Bugs
15
Commits
122
Features
37
Lines of code
68,467
Activity Months11

Work History

March 2026

24 Commits • 6 Features

Mar 1, 2026

March 2026 monthly summary for chef/chef-test-kitchen-enterprise focused on governance, CI stability, testing reliability, and developer productivity. Delivered foundational licensing governance, secret-based licensing, CI/token migrations, branch stabilization, observability improvements, and test enhancements, driving security, compliance, and faster release cycles.

February 2026

2 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for chef/chef-test-kitchen-enterprise focusing on enterprise testing improvements and CI reliability. Delivered Dokken driver testing and compatibility improvements by updating dependencies and temporarily switching the Dokken driver repo to align with ongoing updates, resulting in more stable and faster integration tests within Chef Test Kitchen for enterprise scenarios. The changes reduce test flakiness, shorten feedback loops, and support safer deployments in production environments.

January 2026

11 Commits • 2 Features

Jan 1, 2026

January 2026 monthly summary for chef-test-kitchen-enterprise focusing on CI/CD performance, dependency/licensing/security enhancements, and governance improvements. Delivered faster, more reliable builds; consolidated dependencies and improved security posture; and enhanced code hygiene to support scalable, compliant development and deployment.

December 2025

32 Commits • 9 Features

Dec 1, 2025

December 2025 focused on security, infrastructure reliability, and CI/CD stability for the chef-test-kitchen-enterprise repo. Delivered security-conscious authentication improvements, strengthened provisioning and test infrastructure, modernized the test harness, and improved CI/CD tooling and dependency management. These efforts shorten feedback loops, reduce provisioning friction, and improve governance around dependencies and licensing while maintaining high test coverage across environments.

November 2025

2 Commits • 1 Features

Nov 1, 2025

November 2025: Implemented provisioning architecture modernization for chef-test-kitchen-enterprise. Delivered modular architecture with kitchen-chef-enterprise gem plugin, removed legacy Chef provisioner, and switched the default Test Kitchen provisioner from Chef Infra to Shell. These changes reduce maintenance burden, improve provisioning speed and portability, and position the project for future enterprise extensions. No critical bugs reported; provisioning workflow was stabilized. Key technologies demonstrated include Ruby gem plugin architecture, Test Kitchen, Shell-based provisioning, and modular refactoring with strong Git traceability via targeted commits.

October 2025

1 Commits

Oct 1, 2025

Monthly performance summary for 2025-10 highlighting delivery on the Test Kitchen Exec Driver in chef/chef-test-kitchen-enterprise, focusing on reliability, test coverage, debugging tooling, and cross-platform CI stability. The month centered on stabilizing the exec driver, expanding tests, and enabling debugging workflows to reduce incident response times and accelerate release readiness. Key work included a targeted exec-driver fix (commit 1029e95be7c8b1f8592b5aef74c1d070cd7aa831) with extensive unit tests, environment debugging enhancements, and compatibility updates (Ruby 3.3) to support broader use in production pipelines.

September 2025

46 Commits • 14 Features

Sep 1, 2025

September 2025 focused on delivering a solid foundation for Chef testing ecosystems, expanding test coverage, and hardening CI/CD pipelines across two repos (chef/chef-test-kitchen-enterprise and chef/chef). The work enabled more reliable local and CI validation, reduced time-to-detect regressions, and prepared the ground for scalable feature delivery.

August 2025

1 Commits • 1 Features

Aug 1, 2025

Monthly work summary for 2025-08 focused on delivering VirtualBox 7.2 support for hashicorp/vagrant. Implemented a new driver class and updated documentation to reflect compatibility with VirtualBox 7.2, enabling Vagrant to interact with 7.2 releases. This work keeps the product aligned with current virtualization platforms and reduces friction for developers relying on VirtualBox 7.2. Commit and traceability: 4978fab04546b74ccf4ef9664d910b76d55c54dd ("Add Vbox 7.2 support (#13709)").

June 2025

1 Commits • 1 Features

Jun 1, 2025

June 2025 – Chef/chef: Habitat Docker Image Build Pipeline Optimization delivered. Streamlined Docker image build process by removing unused parameters, simplifying download and extraction of the hab binary, and updating checksums for linting tests to improve efficiency and maintainability. No major bugs fixed in this repository this month. Overall impact: faster CI builds, reduced maintenance burden, and more reliable Habitat image artifacts. Demonstrates strong skills in Docker, CI/CD optimization, checksum handling, and disciplined changelog/commit hygiene.

May 2025

1 Commits • 1 Features

May 1, 2025

May 2025 summary for chef/chef: Implemented EditorConfig to standardize coding styles, updated repository hygiene, and fixed a spell check linting issue to improve code quality and consistency. These changes reduce review friction, improve maintainability, and support scalable future development.

January 2025

1 Commits • 1 Features

Jan 1, 2025

January 2025 (2025-01) monthly summary for chef/chef: Key feature delivered is the CI Testing Matrix Simplification, removing end-of-life platforms to focus on currently supported platforms, resulting in faster CI cycles and reduced maintenance. Major bugs fixed: None reported this month. Overall impact: improved release velocity, more reliable platform testing, and lower CI overhead. Technologies/skills demonstrated: CI/CD, test matrix optimization, platform support configuration, and precise Git operations. Commit reference: ad1d79dca984817c141d10480c52470aef7abd09 (PR #14790).

Activity

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Quality Metrics

Correctness89.2%
Maintainability89.2%
Architecture86.6%
Performance85.6%
AI Usage20.4%

Skills & Technologies

Programming Languages

BashDockerfileEditorConfigPowerShellRubyShellYAMLbash

Technical Skills

Build AutomationBuildkiteBundlerCI/CDCI/CD ConfigurationCode FormattingCode RefactoringConfiguration ManagementContinuous IntegrationCucumberDebuggingDependency ManagementDependency managementDevOpsDocker

Repositories Contributed To

3 repos

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

chef/chef-test-kitchen-enterprise

Sep 2025 Mar 2026
7 Months active

Languages Used

RubyShellYAMLBashbashPowerShell

Technical Skills

BuildkiteBundlerCI/CDCI/CD ConfigurationCode FormattingCode Refactoring

chef/chef

Jan 2025 Sep 2025
4 Months active

Languages Used

YAMLEditorConfigDockerfileRubyShell

Technical Skills

CI/CDTestingCode FormattingConfiguration ManagementBuild AutomationDevOps

hashicorp/vagrant

Aug 2025 Aug 2025
1 Month active

Languages Used

Ruby

Technical Skills

Documentation UpdateProvider IntegrationVersion Support