Workflows
How do I limit a workflow to one run at a time?
Quick answer
Use a fixed concurrency group name with cancel-in-progress: false.
The detail that matters
Right for deploys, where you want a queue rather than cancellation.
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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.