The Visual Studio Codespaces portal was fully retired, and all remaining data was deleted. Major Differences and Improvements
While both services share the same underlying technology—VS Code running on Linux—the move to GitHub introduced several shifts: Visual Studio Codespaces is moving to GitHub
GitHub Codespaces initially defaults to the light GitHub theme, whereas the original service used the VS Code "Dark+" default. The Visual Studio Codespaces portal was fully retired,
The migration followed a phased decommissioning of the Azure-based service: Visual Studio Codespaces is moving to GitHub