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Multi-Device Preference Sync Divergence With Vector Clocks Done Wrong : Merge Correctness Under Concurrent Mutation
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Problem Breakdown
The root defect is that mutation is allowed concurrently from multiple writers while correctness is deferred to a merge step that was never designed with domain semantics in mind. Apps syncing user preferences across devices implement homemade versioning: a single updated_at timestamp per record means two devices editi…
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