Supporting methodology and editorial history

Retained October 9, 2026. These passages preserve scope and revision history; they are not new test results. Source references remain in the article.

Implementation basis: source inspection of 8DB commit 739cfb90 and BraidVault test source at aaf5f66c, with a historical device-test report. This article presents working component mechanisms and an integration opportunity; a complete replacement of Apple's device data stack has not been demonstrated by this review.