Question

Your team's CI workflow runs on every push to feature branches. Developers frequently push several commits in quick succession, and you notice that multiple redundant workflow runs pile up and consume runner minutes. You want each new push to a given branch to automatically cancel any still-running workflow for that same branch, while runs on different branches continue independently. Which workflow configuration achieves this?

Accepted Answer

Add a top-level 'concurrency' block with 'group: ${{ github.workflow }}-${{ github.ref }}' and 'cancel-in-progress: true'

Answer

Set 'strategy: fail-fast: true' on the build job so that new runs terminate older ones

Answer

Add 'concurrency: ${{ github.workflow }}' at the top level without setting cancel-in-progress

Answer

Configure 'max-parallel: 1' in the job matrix strategy to serialize runs per branch