Johan-J contributed to the hydraxman/vscode-copilot-chat repository by developing a feature that enhances model discoverability and governance within the extension. He implemented grouping for Bring Your Own Key (BYOK) custom models in the Model Picker, displaying both the owner and key name to help users clearly identify and categorize available models. This work, completed using TypeScript and leveraging API integration, improved the user experience by reducing ambiguity and enabling faster, more accurate language model selection. Johan-J’s approach emphasized traceability and compliance, reinforcing security and governance requirements while maintaining stability and focusing on practical, user-facing improvements in VS Code extension development.