Because environments were not automatically transferred, developers had to manually move their work:
GitHub Codespaces initially defaults to the light GitHub theme, whereas the original service used the VS Code "Dark+" default.
Visual Studio Codespaces officially retired on , consolidating its features into GitHub Codespaces . Microsoft made this move to simplify the developer experience by providing a native, "one-click" workflow directly within the GitHub platform where most code already resides. Key Transition Timeline
The original Azure offering allowed for more granular manual control over instance sizes at creation, a feature that was later streamlined in the GitHub implementation . How to Migrate Code
Current users were invited to join the GitHub Codespaces beta.
The migration followed a phased decommissioning of the Azure-based service:
Users can now launch environments directly from a GitHub repository's "Code" button instead of managing separate Azure plans and subscriptions.
The service became read-only; users could no longer create new plans or codespaces.