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f857e8d66e
wrapNoteMessage measures every fit decision in visible columns, but its splitLongWord fallback (for a single word longer than the line budget) sliced the word into groups of maxLen code points. maxLen is a visible-column budget, so a run of wide characters (CJK / fullwidth / emoji, 2 columns each) produced lines up to twice the budget — e.g. a 24-char CJK word at maxWidth 20 emitted a 40-column line. Accumulate grapheme visible width (the same unit visibleWidth uses) and start a new segment when the next grapheme would exceed maxLen, so every wrapped segment fits the budget; a single grapheme wider than the budget still emits, preserving progress. ASCII wrapping is unchanged. Co-authored-by: ly-wang19 <ly-wang19@users.noreply.github.com> Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>