stack sync is a rebase and a reconcile. The rebase takes --target; the
reconcile reads the target off the records. Naming a target the stack does
not target replayed the branch onto one branch and built every round against
another, so the rounds were patches against a base the pulls do not name.
The existing note fires for that, but it describes a target that has moved rather than two targets in one run, and it is a note.
Co-Authored-By: Claude Opus 5 (1M context) noreply@anthropic.com