repo-state §6.1 requires reading the configured value and falling back to trunk only when main-branch is unset -- "MUST NOT assume a fixed string in the presence of an explicit setting". branchValueOf, which backs the §7.2 same-branch leaf test, used the literal.

It hid because all three uses are comparisons: when both sides fall back identically the result is unchanged. It bites when one check-in is tagged and another is not, which is the imported-repository shape -- displayed as one branch by branchOf, leaf-tested as another by branchValueOf.

The name is now a field on RepoState, set through one RepoView setter so the two readers cannot drift, with branchOf asserting its argument agrees. That assert immediately found a second source: update.zig re-read the config itself and passed a value the state never saw. It also treats an empty stored name as unset, as the view already did. check-in: c8c7c2696e user: dmestas tags: sub-manifest