ci / test (pull_request) Successful in 2m13s
Why: git receive-pack runs 'gc --auto' in the background after a push; the fixture's TemporaryDirectory teardown then races the gc writer and fails with OSError 39 (remote.git not empty) — observed on the PR #285 runner (job 1967). The fixture remote holds no durable value, so auto-gc is pure flake surface. Evidence: the failing test passes 5/5 locally after the fix; full make test-governance green (104 tests). Impact: test fixture only; no governance-script behavior change. Refs: Dev CI run 1438 job 1967; same race family as the upload-host TempDir flake fixed earlier.