Top Highlights

• You can set your own custom variables or use the default environment variables that GitHub sets automatically.
• You can access env variable values using runner environment variables or using contexts
• The commands in the run steps of a workflow, or a referenced action, are processed by the shell you are using on the runner
• The instructions in the other parts of a workflow are processed by GitHub Actions and are not sent to the runner
• You can use either runner environment variables or contexts in run steps, but in the parts of a workflow that are not sent to the runner you must use contexts to access variable values.

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