Its sibling sync-plugin-content.sh has thorough coverage
(tests/test-sync-plugin-content.sh) but this drift guard -- wired into
pre-commit as check-marketplace-mirror-sync, keeping
.claude-plugin/marketplace.json and .github/plugin/marketplace.json in
sync -- had none. A silent regression here would let the two
marketplace manifests drift without any test catching it.
Covers: missing-source no-op in both real-sync and --check modes,
drift detection when the mirror is missing or stale, real sync
producing a byte-identical mirror, --check clean immediately after
sync, drift from an edited source cleared by re-sync, an
already-in-sync mirror reporting no drift, usage-error rejection of
unrecognized/extra arguments, and idempotency of repeated syncs.
Defame1297
2c731eb476