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The --no-ci-expected admin-success path accepted an asserted-by=unknown pass when MOSAIC_GIT_IDENTITY was unset or empty, so the queue-clear assertion and its NO_CI_ASSERTED audit record named no one. Refuse such callers with a distinct ASSERTION_UNATTRIBUTABLE outcome (exit 78, audit recorded) before queue-clear and before the permission lookup, so an unattributable caller never triggers that network call. Document exit 78 in the usage text and the tools reference; pin the path with a regression case (admin stub + env -u MOSAIC_GIT_IDENTITY).