Two-slot shell topbar (home, left, center, bell, user menu) with SDK API (setLeft/setSlot/setTitle/hide/show). All 4 primary surfaces migrated: Settings and Team Admin to Pattern B (flat tabs), Admin to Pattern C (category tabs + sidebar), Docs to Pattern A (default). Backend WS events: package.changed (broadcast), auth.changed (targeted), notification.all_read. User menu re-fetches on package/auth changes. Bell syncs read state across tabs. Error handling pass with .sw-inline-error CSS primitive. Empty state guidance for Admin Workflows/Groups. Announcement global dismiss via localStorage. Rebrand assets deployed (both b/e icon variants, wordmarks, full icon library). Docs outline scroll-to-heading fix. Bug fixes: ICD security assertion tightened, workflow-demo error surfacing, signoff display names, hello-dashboard + team-admin/groups.js deleted. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>