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Marc-André Cournoyer

PROFILE

Marc-andré Cournoyer

Marc-André Cournoyer developed advanced profiling and multi-channel tooling features for Shopify’s CLI and roast repositories over a three-month period. He enhanced theme profiling workflows by introducing a robust theme profile command, integrating DevServer-based profiling, and supporting JSON and Speedscope outputs for automated diagnostics. His work included token-based authentication, improved error handling, and cross-environment reliability, leveraging TypeScript, Node.js, and JavaScript. For Shopify/roast, Marc-André integrated Multi-Channel Protocol tooling, aligning dependencies and clarifying environment configuration. His contributions focused on maintainability, test coverage, and developer experience, demonstrating depth in backend development, CLI tooling, and configuration management across complex, production-grade codebases.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

34Total
Bugs
0
Commits
34
Features
3
Lines of code
1,325
Activity Months3

Work History

May 2025

5 Commits • 1 Features

May 1, 2025

May 2025 monthly summary for Shopify/roast focused on delivering MCP Tooling Integration and Development Dependency Alignment to enable multi-channel capabilities and improve developer efficiency. Key changes include integrating MCP tooling across workflow configuration and initialization, providing an example MCP workflow, and aligning dependencies by using the development version of the raix gem to unlock MCP-related capabilities. The MCP client environment handling was clarified by introducing a dedicated 'env' key. Also implemented MCP tooling loading, added an example workflow to demonstrate MCP usage, and fixed stdio MCP issues while renaming the header config to 'env' for consistency.

January 2025

16 Commits • 1 Features

Jan 1, 2025

January 2025 monthly summary for Shopify/cli: Delivered Theme Profiling Feature with a theme profile command and DevServer-based profiling workflow, including enhanced error handling, CLI flags, tests, and tooling integration for Shopify themes. Added environment-aware profiling via --environment flag and completed tooling integration, docs regeneration, and manifest refresh. Result: faster, more reliable theme debugging, improved developer experience, and better cross-environment stability across themes.

December 2024

13 Commits • 1 Features

Dec 1, 2024

December 2024 monthly summary for Shopify/cli: Delivered the enhanced Shopify Theme Profile Command with streamlined profiling for theme pages, enabling automated analysis and faster diagnostics. Implemented JSON output mode, Speedscope integration, and optional raw JSON, with token-based authentication and robust URL/API validation. Documentation, examples, tests, and generated docs were updated to support adoption and reliability. Dependency management was tightened via manifest refreshes and lockfile updates to ensure reproducible builds. Overall, the work improves performance visibility for theme developers and strengthens security, test coverage, and maintainability.

Activity

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Quality Metrics

Correctness91.2%
Maintainability90.6%
Architecture87.6%
Performance84.8%
AI Usage23.0%

Skills & Technologies

Programming Languages

BashJSONJavaScriptMarkdownRubyShellTypeScriptYAML

Technical Skills

AI/MLAPI IntegrationAuthenticationBackend DevelopmentCLI DevelopmentCode LintingCommand Line Interface (CLI) ToolsConfiguration ManagementDependency ManagementDevOpsDocumentationError HandlingJavaScriptLintingModule Resolution

Repositories Contributed To

2 repos

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

Shopify/cli

Dec 2024 Jan 2025
2 Months active

Languages Used

BashJavaScriptMarkdownTypeScriptYAMLJSONShell

Technical Skills

API IntegrationAuthenticationCLI DevelopmentConfiguration ManagementDependency ManagementDocumentation

Shopify/roast

May 2025 May 2025
1 Month active

Languages Used

RubyYAML

Technical Skills

AI/MLAPI IntegrationBackend DevelopmentCommand Line Interface (CLI) ToolsConfiguration ManagementDependency Management

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