bothModesNotice function
The both-modes notice: names the ignored exact-match payload and the winner, so the model stops re-sending the pair (E4).
Implementation
String bothModesNotice({required String winner}) =>
'Note: the call carried BOTH edit modes; the harness applied '
'$winner and IGNORED the other mode\'s arguments '
'(oldText/newText or patch). Send exactly one mode per call.';