Update: I got the workflow setup to complete by first using Xcode’s File > Save As Workspace…, then reopening the generated .xcworkspace and configuring Xcode Cloud. Before that, the Xcode console showed Workspace or window was not found when attempting to begin onboarding at XcodeCloudNavigator.Mode.Onboarding.beginFlow. The first cloud run said the workspace was missing from the repository. After committing the workspace, the next run required a workspace-level Package.resolved, which I committed. Build 3 then succeeded for iOS but remained at Resolve package dependencies for watchOS for over 15 minutes, logging only fetches from public repositories. I cancelled it and used Clean and Rebuild on the same commit (453ca3a) without source changes. Build 4 succeeded for both iOS and watchOS on Xcode 27.1. I don’t know the cause; the watchOS hang appears to have been transient.