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A stale post-merge branch can survive with its worktree still present, and rerunning gx branch finish on that same head was creating a brand-new PR instead of treating the lane as already shipped. The finish flow now checks merged PR history for the exact source HEAD before PR creation so cleanup reruns stay bounded and idempotent. Constraint: Keep legitimate follow-up PRs working when the branch name is reused with a different head commit Rejected: Skip PR flow for any previously merged branch name | branch names can be reused for new commits and still need a real PR Confidence: high Scope-risk: narrow Directive: Keep the merged-head guard tied to exact HEAD SHA matches; do not widen it to branch-name-only detection Tested: bash -n scripts/agent-branch-finish.sh templates/scripts/agent-branch-finish.sh Tested: node --test test/finish.test.js Tested: node --test test/metadata.test.js Tested: git diff --check Not-tested: Live GitHub cleanup rerun against a hosted repo after a previously merged PR
NagyVikt
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Automated by gx branch finish (PR flow).