Glossary ======== .. glossary:: :sorted: RC bug A release-critical bug (severity: critical, grave, serious) that must be resolved or explicitly waived before a stable release. Unblock Approval granted by the Release Team allowing a package migration during freeze stages. britney Testing migration script/tool evaluating package migrations based on policies. dak Debian archive management software. Transition Coordinated library/ABI or systemic change requiring rebuilds across dependent packages.