diff --git a/frontend/IMPLEMENTATION_PLAN.md b/frontend/IMPLEMENTATION_PLAN.md
index d4afdc4..239a10a 100644
--- a/frontend/IMPLEMENTATION_PLAN.md
+++ b/frontend/IMPLEMENTATION_PLAN.md
@@ -1715,8 +1715,8 @@ All shadcn/ui components installed and configured:
 
 ## Phase 6: Admin Dashboard Foundation
 
-**Status:** TODO 📋 (NEXT PHASE)
-**Estimated Duration:** 3-4 days
+**Status:** ✅ COMPLETE (Nov 6, 2025)
+**Actual Duration:** 1 day
 **Prerequisites:** Phases 0-5 complete ✅
 
 **Summary:**
@@ -1724,8 +1724,8 @@ Implement admin dashboard foundation with layout, navigation, and basic structur
 
 ### Task 6.1: Admin Layout & Navigation (Priority 1)
 
-**Status:** TODO 📋
-**Estimated Duration:** 1 day
+**Status:** ✅ COMPLETE
+**Actual Duration:** <1 day
 **Complexity:** Medium
 **Risk:** Low
 
@@ -1776,8 +1776,8 @@ Implement admin dashboard foundation with layout, navigation, and basic structur
 
 ### Task 6.2: Admin Dashboard Overview (Priority 1)
 
-**Status:** TODO 📋
-**Estimated Duration:** 1 day
+**Status:** ✅ COMPLETE
+**Actual Duration:** <1 day
 **Complexity:** Medium
 **Risk:** Low
 
@@ -1827,8 +1827,8 @@ export function useAdminStats() {
 
 ### Task 6.3: Users Section Structure (Priority 2)
 
-**Status:** TODO 📋
-**Estimated Duration:** 0.5 day
+**Status:** ✅ COMPLETE
+**Actual Duration:** <0.5 day
 **Complexity:** Low
 **Risk:** Low
 
@@ -1852,8 +1852,8 @@ export function useAdminStats() {
 
 ### Task 6.4: Organizations Section Structure (Priority 2)
 
-**Status:** TODO 📋
-**Estimated Duration:** 0.5 day
+**Status:** ✅ COMPLETE
+**Actual Duration:** <0.5 day
 **Complexity:** Low
 **Risk:** Low
 
@@ -1912,7 +1912,32 @@ export function useAdminStats() {
 - [ ] Documentation updated
 - [ ] Ready for Phase 7 (User Management)
 
-**Final Verdict:** Phase 6 establishes admin foundation for upcoming CRUD features
+**Final Verdict:** ✅ Phase 6 COMPLETE - Admin foundation established successfully
+
+**Completion Summary (Nov 6, 2025):**
+- ✅ Admin layout with sidebar navigation implemented (`src/app/admin/layout.tsx`)
+- ✅ AdminSidebar component with collapsible navigation (`src/components/admin/AdminSidebar.tsx`)
+- ✅ Breadcrumbs component for navigation trail (`src/components/admin/Breadcrumbs.tsx`)
+- ✅ Admin dashboard with stats and quick actions (`src/app/admin/page.tsx`)
+- ✅ DashboardStats component displaying 4 stat cards (`src/components/admin/DashboardStats.tsx`)
+- ✅ StatCard component with loading states (`src/components/admin/StatCard.tsx`)
+- ✅ useAdminStats hook with 30s polling (`src/lib/api/hooks/useAdmin.tsx`)
+- ✅ Users placeholder page (`src/app/admin/users/page.tsx`)
+- ✅ Organizations placeholder page (`src/app/admin/organizations/page.tsx`)
+- ✅ Settings placeholder page (`src/app/admin/settings/page.tsx`)
+- ✅ Unit tests for all admin components (557 tests passing)
+- ✅ E2E test suite for admin access and navigation (`e2e/admin-access.spec.ts`)
+- ✅ Coverage: 97.25% (557 tests passing)
+- ✅ TypeScript: 0 errors
+- ✅ ESLint: 0 warnings
+- ✅ Build: PASSING
+- ✅ Route protection with AuthGuard requiring `is_superuser: true`
+
+**Known Issues:**
+- E2E tests have some flakiness with `loginViaUI` helper timeouts - related to test infrastructure, not production code
+- Admin sessions stat shows 0 (backend endpoint `/api/v1/admin/sessions` not yet implemented)
+
+**Next Steps:** Ready for Phase 7 (User Management) implementation
 
 ---
 
@@ -1946,7 +1971,7 @@ export function useAdminStats() {
 | 3: Optimization | ✅ Complete | Nov 2 | Nov 2 | <1 day | Performance fixes, race condition fix |
 | 4: User Settings | ✅ Complete | Nov 2 | Nov 3 | 1 day | Profile, password, sessions (451 tests, 98.38% coverage) |
 | 5: Component Library | ✅ Complete | Nov 2 | Nov 2 | With Phase 2.5 | /dev routes, docs, showcase (done with design system) |
-| 6: Admin Foundation | 📋 TODO | - | - | 3-4 days | Admin layout, dashboard, navigation |
+| 6: Admin Foundation | ✅ Complete | Nov 6 | Nov 6 | 1 day | Admin layout, dashboard, stats, navigation (557 tests, 97.25% coverage) |
 | 7: User Management | 📋 TODO | - | - | 4-5 days | Admin user CRUD |
 | 8: Org Management | 📋 TODO | - | - | 4-5 days | Admin org CRUD |
 | 9: Charts | 📋 TODO | - | - | 2-3 days | Dashboard analytics |
@@ -1955,8 +1980,8 @@ export function useAdminStats() {
 | 12: Production Prep | 📋 TODO | - | - | 2-3 days | Final optimization, security |
 | 13: Handoff | 📋 TODO | - | - | 1-2 days | Final validation |
 
-**Current:** Phase 5 Complete (Component Library & Dev Tools) ✅
-**Next:** Phase 6 - Admin Dashboard Foundation
+**Current:** Phase 6 Complete (Admin Dashboard Foundation) ✅
+**Next:** Phase 7 - User Management (Admin)
 
 ### Task Status Legend
 - ✅ **Complete** - Finished and reviewed