About schema previews
During the preview period, we may change some features based on developer feedback. If we do make changes, we'll announce them on the developer blog without advance notice.
To access a schema preview, you'll need to provide a custom media type in the Accept header for your requests. Feature documentation for each preview specifies which custom media type to provide.
Note: The GraphQL schema members under preview cannot be accessed via the Explorer at this time.
Deployments preview
This preview adds support for deployments mutations and new deployments features.
To toggle this preview and access the following schema members, you must provide a custom media type in the `Accept` header:
application/vnd.github.flash-preview+jsonPreviewed schema members:
DeploymentStatus.environmentMutation.createDeploymentStatusMutation.createDeployment