Four xcodebuild attempts, all wedged in the same path: +[IDEContainer retainedWrappedWorkspaceForContainerAtFilePath:] → -[DVTDispatchLock performLockedBlock:]. Even xcodebuild -list — a metadata read with no compile phase — hung. The pattern (same lock, no swift-frontend children, 0% CPU, system load 5-12+) was the signal that the xcodebuild environment itself was broken, not the project. Trying variants (fresh DerivedData, different destinations, background vs. foreground) only confirmed the bug lived upstream of the code.
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