No workflow declares a concurrency: group, so rapid pushes / PR force-pushes stack runs instead of cancelling superseded ones — wasted runner time + slower latest-result.
Add concurrency: { group: <workflow>-${{ github.ref }}, cancel-in-progress: true } to ubuntu-latest, windows-latest, macos-latest, edge (and the future experimental/preview workflows).
Exception: do NOT add cancel-in-progress to release.yml — never cancel a publish mid-flight.
Low-risk quick win. Milestone: CI cost & pipeline structure.
No workflow declares a
concurrency:group, so rapid pushes / PR force-pushes stack runs instead of cancelling superseded ones — wasted runner time + slower latest-result.Add
concurrency: { group: <workflow>-${{ github.ref }}, cancel-in-progress: true }toubuntu-latest,windows-latest,macos-latest,edge(and the futureexperimental/previewworkflows).Exception: do NOT add
cancel-in-progresstorelease.yml— never cancel a publish mid-flight.Low-risk quick win. Milestone: CI cost & pipeline structure.