Is there a way to check if GitHub Actions are running on the Graphite Merge Queue?

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I want to run a GitHub Actions job when the PR is on the Merge Queue. I want to skip some jobs if the PR is on the Merge Queue.

thanks for clarifying. graphite doesn't have a built in way to skip specific CI jobs when a PR is in the merge queue. we do have CI optimization which is not enabled in your merge queue settings. with the ci optimization, you can skip CI on midstack PRs and rebases are triggered by updates to other PRs in the stack based on how you configure the settings.