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Marc Greenstock

PROFILE

Marc Greenstock

Marc Greenstock contributed to the vercel/terraform-provider-vercel and vercel/vercel repositories by building and enhancing access control and authentication features. He developed CRUD operations for Vercel Access Groups, integrated new data sources for DSync group management, and implemented OIDC token configuration validation to streamline team and project access workflows. Using Go, TypeScript, and Terraform, Marc improved infrastructure automation and security by centralizing permissions and reducing misconfiguration risks. He also added a CLI command for OIDC token retrieval, supporting developer automation and CI/CD workflows. His work demonstrated depth in backend development, API integration, and infrastructure as code, addressing real operational needs.

Overall Statistics

Feature vs Bugs

80%Features

Repository Contributions

5Total
Bugs
1
Commits
5
Features
4
Lines of code
2,249
Activity Months4

Work History

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary for vercel/vercel: Added a new development OIDC token retrieval command to the CLI, enabling developers to fetch a development OIDC token for a project directly from the CLI. This improves developer workflow, supports automation, and enhances on-call and CI/CD token handling.

June 2025

2 Commits • 2 Features

Jun 1, 2025

June 2025 performance summary for vercel/terraform-provider-vercel: Delivered feature improvements including deprecation validator for OIDC token config and new DSync groups data source for Vercel Teams. No major bug fixes this month. These changes improve configuration clarity, stability, and automation capabilities for team management, aligning with product goals and security posture.

May 2025

1 Commits

May 1, 2025

May 2025 Monthly Summary for vercel/vercel: Delivered a critical OIDC token loading precedence fix to improve authentication reliability and security across requests. The change prioritizes the x-vercel-oidc-token header over the VERCEL_OIDC_TOKEN environment variable to ensure the most immediate token source is used, preventing token overwrites. This reduces token misconfiguration risk and strengthens access control in production.

November 2024

1 Commits • 1 Features

Nov 1, 2024

Monthly work summary for 2024-11 focusing on delivering Vercel Access Groups management features within the vercel/terraform-provider-vercel repository, including new resources and data sources and the initial commit enabling CRUD operations and project assignments for access groups.

Activity

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Quality Metrics

Correctness96.0%
Maintainability92.0%
Architecture88.0%
Performance80.0%
AI Usage24.0%

Skills & Technologies

Programming Languages

GoHCLJavaScriptMarkdownTypeScript

Technical Skills

API DevelopmentAPI IntegrationBackend DevelopmentCLI DevelopmentData ModelingDocumentationError HandlingGoGo ProgrammingInfrastructure as CodeNode.jsTerraform Provider Development

Repositories Contributed To

2 repos

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

vercel/terraform-provider-vercel

Nov 2024 Jun 2025
2 Months active

Languages Used

GoMarkdownHCL

Technical Skills

API IntegrationGo ProgrammingInfrastructure as CodeTerraform Provider DevelopmentData ModelingDocumentation

vercel/vercel

May 2025 Feb 2026
2 Months active

Languages Used

JavaScriptTypeScript

Technical Skills

API DevelopmentBackend DevelopmentNode.jsAPI IntegrationCLI DevelopmentError Handling