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The run built per-run images and then retagged them to fips-test:latest as a compatibility bridge for the consumers that had never been migrated. The bridge was the defect: while it existed, two concurrent runs shared one binding, so a suite could start containers from the other run's binaries and the verdict was recorded against a commit whose code never ran. It fails silently by construction — the run is green either way, and nothing compares a running container's binary against the commit under test. Every consumer now reads the run's image, so the retag is deleted rather than kept. That is the point of deleting it: a consumer that was missed fails loudly instead of quietly resolving whichever run wrote the tag last. Two consequences handled here. The cleanup script ran ip(8) inside fips-test:latest to reap simulation interfaces, and nothing writes that tag any more, so it now takes the caller's image, then the run's, then any surviving test image — the last of which is what keeps an unscoped --reap working, since that path execs before the run identity is exported. And a guard checks statically that nothing names the shared tag, because on a host with a hand-built copy lying around a reintroduction would run green; it is break-checked against a reintroduced compose consumer and a reintroduced default. Both runners gate on it, as they do the other guards.