Kernrechtsfrage
Whether the superstructure agreement excluded any reversion indemnity by implied or written waiver.
Extrahierter Entscheid
No waiver was established; the agreements and later conduct supported an indemnity obligation.
Extrahierte Begründung
The cantonal court's factual findings on the parties' intentions were binding in reform proceedings, and the recourse merely sought a reassessment of those findings.