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Summary

• Document a real Apple TV secondary-profile failure in which CloudKit supplied the default account despite correct current-user entitlements.
• Add a privacy-safe account-versus-store diagnostic ladder and bounded, owner-coordinated profile repair guidance.
• Prepare documentation-only CloudSaveKit 0.3.1 release; public API and runtime behavior are unchanged.

Validation

• swift test: 87 tests in 15 suites passed.
• DocC generated successfully for CloudSaveKit.
• Consumer setup, strict Swift Format lint, and git diff --check passed.

Device evidence

• On a real tvOS 27.2 Apple TV, B initially received A's verified CloudKit account and collection. A normal restart did not help.
• After owner-approved removal and re-addition of B, repeated A/B switches returned distinct verified accounts and collections. A signed WortJagd feature build confirmed a B-authored entry to CloudKit before dismissal; it remained absent under A.
• The internal tvOS cause is unknown; the repair is one observed outcome.