Latest review note

scripts/review-note-test

@@ -49,4 +49,23 @@ sed 's/^verdict: request-changes/verdict: approve/' "$note" > "$tmp/note1b"
 "$rn" write "$tmp/note1b" --force
 "$rn" show | grep -q '^verdict: approve$' || fail "show should print the replaced note"
 
-echo "ok: show/write"
+# latest finds the note by branch, even from a newer unreviewed tip
+echo three > c.txt && git add c.txt && git commit -qm three
+"$rn" latest main | grep -q '^verdict: approve$' || fail "latest should find the round 1 note"
+
+# a note for another branch must not leak into the result
+sed -e 's/^branch: main/branch: other/' -e 's/^round: 1/round: 9/' "$tmp/note1b" > "$tmp/other"
+"$rn" write "$tmp/other"
+"$rn" latest main | grep -q '^verdict: approve$' || fail "latest should ignore other branches"
+
+# round 2 on the new tip wins and carries previous (replaces the
+# other-branch note on the same commit, so --force)
+PREV=$(git rev-parse HEAD~1)
+sed -e 's/^round: 1/round: 2/' -e "s/^previous: none/previous: $PREV/" "$tmp/note1b" > "$tmp/note2"
+"$rn" write "$tmp/note2" --force
+"$rn" latest main | grep -q '^round: 2$' || fail "latest should pick the highest round"
+"$rn" latest main | grep -q "^previous: $PREV$" || fail "round 2 should carry previous"
+
+if "$rn" latest nosuch >/dev/null 2>&1; then fail "latest should exit 1 for an unknown branch"; fi
+
+echo "ok: show/write/latest"