The flag step never read it: parseVerdict destructures duplicate_of,
confidence and evidence only, so considered cost tokens on every issue
and went straight on the floor. The parse test now covers extra keys
being dropped instead of asserting a field that no longer exists.
The notice now asks the sweep's own duplicateTarget whether the title
match would close the issue, so a two-word title no longer gets a close
warning the sweep would refuse to act on. The ask no longer promises
that a reply removes the label, since nothing does that automatically
A verdict is now dropped when it names a pull request, the issue itself,
or a newer issue, and the label goes on before the comment so a failed
comment leaves no marker and the rerun finishes the job. The flag logic
lives in scripts/flag-duplicate-issue.ts next to the sweep it feeds,
sharing normalizeTitle and the marker format, with bun tests that run on
pull requests touching it
