A merged or closed PR kept every pull_request run going: concurrency groups
cancel a run only when a newer push arrives. After #12329 merged, 16 of its
runs were still queued or running. On pull_request_target closed, cancel the
queued and running pull_request runs on the PR's head branch whose commit
belongs to the PR.
Claude-Session: https://claude.ai/code/session_011UpvafvK8JpagF94MHWqwK
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
