Fixing Intermittent Auth Failures in Chrome Manifest V3
The fix was architectural: IndexedDB as canonical auth state, read-time refresh, and serialized refresh to prevent token-rotation races in Manifest V3.

Architecture notes, reliability incidents, browser extension internals, and product engineering lessons from the team building Tweeks.
The fix was architectural: IndexedDB as canonical auth state, read-time refresh, and serialized refresh to prevent token-rotation races in Manifest V3.
