Moved metadata from action.yml to Dockerfile, can't publish to Marketplace anymore

Hello! I moved my action’s metadata from action.yml to the Dockerfile's labels and I can no longer publish a release to the Marketplace. The blue prompt above the files to “Publish this Action to Marketplace” is there but when pressing “Draft a release” the checkbox to publish to the Marketplace doesn’t appear like usual.

The repository is at

Thanks in advance!

edit: FYI for staff, I also opened a ticket with Ticket ID: 386411

Screen Shot 2019-09-13 at 2 14 08 PM

Screen Shot 2019-09-13 at 2 14 15 PM

There was also a notice that went up on the documentation last week (which can be found here):

GitHub no longer supports the HCL syntax in GitHub Actions. … You’ll need to migrate any workflow files that use HCL syntax to use the new YAML syntax. … You’ll also need to ensure you create a metadata file for any actions you’ve built.

This makes it pretty clear that the HCL syntax (i.e. Dockerfile Metadata) is no longer used.

The syntax for the (now required) action.yml file can be found here.

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