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API support for managing labels of Actions self-hosted runners

It is now possible to list, add, and remove runner labels for Actions self-hosted runners via API. For more info on using the new APIs at a repository, organization, or enterprise level, see our docs (for repositories, organizations, and enterprises).

GitHub Actions: Reusable workflows are generally available

Reusable workflows are now generally available. Reusable workflows help you reduce duplication by enabling you to reuse an entire workflow as if it were an action. A number of improvements have been made since the beta was released in October:

  • You can utilize outputs to pass data from reusable workflows to other jobs in the caller workflow
  • You can pass environment secrets to reusable workflows
  • The audit log includes information about which reusable workflows are used

Learn more about reusing workflows.
For questions, visit the GitHub Actions community.
To see what's next for Actions, visit our public roadmap.

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Specify theme context for images in Markdown

Users can now specify the theme an image is displayed for in Markdown. Appending #gh-dark-mode-only or #gh-light-mode-only to the end of an image url will define whether it's only shown to viewers using a light or a dark GitHub theme. For example:

Two screenshots of the same issue in dark and light color mode demonstrating the two fragment options by showing an optimized github logo for each color mode

The GitHub logo in the above screenshots uses the following Markdown to specify the theme context:

![GitHub-Mark-Light](https://user-images.githubusercontent.com/3369400/139447912-e0f43f33-6d9f-45f8-be46-2df5bbc91289.png#gh-dark-mode-only)![GitHub-Mark-Dark](https://user-images.githubusercontent.com/3369400/139448065-39a229ba-4b06-434b-bc67-616e2ed80c8f.png#gh-light-mode-only)
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