Key legal question
Whether a construction supervision contract was concluded between the parties and defendant was passively legitimated
Extracted holding
The alleged contract was not established on appeal review; the cantonal court's factual finding that defendant contracted only with architect B. could not be revisited.
Extracted reasoning
Contract content and party identity are first determined by subjective interpretation. The appellant merely challenged the weighing of evidence, which is not reviewable on federal appeal absent an allegation of breach of an evidentiary rule.