All tidiness, no behavior change: the leading-marker class is one shared constant for citationLabelRe and summaryCloserRe (hand-copying it is how '+' went missing the first time); the deliberate 'all' duplication across summaryCopulas/summaryArticle is now stated at both sites; the weak-final switch case assigns modeBackRef explicitly; test comments state the constraint they guard instead of which reviewer asked for them. Co-Authored-By: Claude Fable 5 <[email protected]>