Workflows
What is the difference between a job and a step?
Quick answer
A job runs on one runner and contains steps; steps run sequentially in the same workspace.
The detail that matters
Jobs get isolation and parallelism but must pass data explicitly. Steps share a filesystem but cannot run in parallel.
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Related
How many jobs can a matrix fan out to?GitHub caps a single matrix at 256 jobs per workflow run.How do I reproduce a CI failure locally?Match the runner image, then SSH into a live runner if the failure only appears in CI.Can I SSH into a runner?Yes. runnerhut supports opening a debug session on a running job with an authorised SSH key.Can I mix GitHub-hosted and managed runners?Yes. runs-on is per job, so different jobs in one workflow can use different providers.