Without a concurrency group, pushing twice to a branch runs both commits to completion instead of cancelling the stale one. It is the single most common gap we see, these popular repos included. Read the fix →
Public data from each repo's GitHub Actions. These repos run Actions free (public repos always do); the dollar figures are the equivalent cost on a private repo, a rough estimate at standard Linux pricing. Actual runners and matrices vary. Repo owners can remove their scorecard any time.