Two ways the matrix misled the person it exists for -- somebody deciding whether to trust this with their backups. master is not the next release. iX branches each major onto its own release/ line and master rolls straight on to the one after: every recent commit on master targets 27.0.0-BETA.1 while 26 is still in beta. So a BROKEN master row, rendered "master (unreleased)", read as "the version you are about to install is broken" when the breakage is a major release away on a line nobody can download. It is now labelled from the newest major in the matrix plus one, so it becomes 28-dev by itself once 27 branches. The break, for the record, is NAS-141498 (2026-06-24), "Convert cloud_backup plugin to the typesafe pattern": it re-signatures restic_backup and get_restic_config, splitting entry/credentials out of the cloud_backup dict. Not being chased while the 27 line churns. The next maintenance release was never checked -- and it is the one that reaches users. Shipped came from TS-* tags, unreleased from release/* branches carrying -BETA/-RC. A branched-but-untagged MAINTENANCE release is neither: release/25.10.5 has no tag, and its line has already shipped, so the "a prerelease of a shipped line is history" filter threw it out. It was invisible, and it is exactly what a 25.10.4 box gets on its next update; a break in it reaches real users before the daily check ever looks, on the only line anybody runs. A plain release/X.Y.Z branch now counts when its line HAS shipped and it sorts NEWER than that line's newest tag. Both exclusions fall out of the same rule: release/24.10-RC.2 sorts older than TS-24.10.2.4 (history), and the typo branch release/25.20.2.2 is on a line with no tag at all (not a release line). This surfaced two refs never checked before -- release/25.10.5 and release/24.10.2.5 -- both of which pass. is_unreleased() keys off where a ref came from (a branch is by construction not shipped) rather than hunting -BETA/-RC in the name. Otherwise release/25.10.5 counts as shipped and a break in it fails the build as a live outage, on a version nobody is running yet.