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You can manually export the branch name into an env variable within github actions and then use that as the stack name. Take a look at this answer here to get some inspiration: https://stackoverflow.com/a/64210623

This is exactly what I was looking for. Thank you @future-refrigerator-88869 very much! ❤️

This is also an example which can give you the same functionality: https://github.com/cobraz/setup-variables/blob/main/examples/simple-workflow.yaml