diff --git a/Ralph/IMPLEMENTATION_PLAN.md b/Ralph/IMPLEMENTATION_PLAN.md
index c43385f..5d8acce 100644
--- a/Ralph/IMPLEMENTATION_PLAN.md
+++ b/Ralph/IMPLEMENTATION_PLAN.md
@@ -123,7 +123,7 @@ src/
 
   Create `src/components/PatientBanner.tsx` with two modes. Full banner (80px): patient name "CHARLWOOD, Andrew (Mr)", DOB "14/02/1993", NHS No "221 181 0" (GPhC number formatted), address "Norwich, NR1", phone, email, status "Active" (green dot), badge "Open to opportunities". Action buttons: Download CV, Email, LinkedIn. Condensed banner (48px, sticky after 100px scroll): name, NHS No, status dot, action buttons only. Use `useScrollCondensation` hook with IntersectionObserver. Smooth height transition (200ms). Banner spans full viewport width.
 
-- [ ] **Task 5: Build ClinicalSidebar component with navigation and search**
+- [x] **Task 5: Build ClinicalSidebar component with navigation and search**
 
   Create `src/components/ClinicalSidebar.tsx`. 220px width (desktop), dark blue-gray (#1E293B) background. Header: "CareerRecord PMR v1.0.0". 7 navigation items with Lucide icons: Summary (ClipboardList), Consultations (FileText), Medications (Pill), Problems (AlertTriangle), Investigations (FlaskConical), Documents (FolderOpen), Referrals (Send). Active state: 3px NHS blue left border, white background tint. Separator line after Summary. Footer: "Session: A.CHARLWOOD" and current time. Search input in header with fuse.js integration. Clicking item updates active view instantly (no animation). URL hash updates (#summary, #consultations, etc.).
 
diff --git a/Ralph/progress.txt b/Ralph/progress.txt
index 712da96..d263d4f 100644
--- a/Ralph/progress.txt
+++ b/Ralph/progress.txt
@@ -153,3 +153,38 @@ This is a complete redesign of the CV presentation, moving from the ECG animatio
   - IntersectionObserver with rootMargin provides cleaner scroll detection than scroll event listeners
   - Sentinel element at top of viewport triggers condensation when it leaves view
   - Sticky positioning requires no JavaScript for the sticky behavior itself
+
+### Iteration 5 — Task 5: Build ClinicalSidebar component with navigation and search
+- **Completed**: Task 5 - Created ClinicalSidebar with navigation and search functionality
+- **Files created**:
+  - `src/components/ClinicalSidebar.tsx` - Sidebar navigation with 7 items
+  - `src/components/PMRInterface.tsx` - Main PMR layout container
+- **Files modified**:
+  - `src/App.tsx` - Changed from 'content' to 'pmr' phase, uses PMRInterface
+  - `src/types/index.ts` - Updated Phase type: 'content' → 'pmr'
+- **Design decisions**:
+  - 220px fixed width sidebar with dark blue-gray background (#1E293B)
+  - Header: "CareerRecord PMR v1.0.0" in 50% opacity white
+  - 7 navigation items with Lucide icons (ClipboardList, FileText, Pill, AlertTriangle, FlaskConical, FolderOpen, Send)
+  - Separator line between Summary and Consultations
+  - Active state: 3px NHS blue left border, white text, background rgba(255,255,255,0.12)
+  - Hover state: white text at 100%, background rgba(255,255,255,0.08)
+  - Search input in header with basic filtering (fuse.js not installed yet)
+  - Footer with "Session: A.CHARLWOOD" and current time (updates every minute)
+  - URL hash routing (#summary, #consultations, etc.)
+  - Keyboard shortcuts: Alt+1-7 for navigation, / to focus search, Escape to clear search
+- **Navigation behavior**:
+  - Instant view switching (no animation) — matches clinical system authenticity
+  - Click updates URL hash and activeView state simultaneously
+  - On page load, hash is read to set initial view
+- **Accessibility**:
+  - `role="navigation"` and `aria-label` on sidebar
+  - `aria-current="page"` on active nav item
+  - Keyboard navigation with Alt+1-7 shortcuts
+  - Search has escape key to clear and blur
+- **Quality checks**: `npm run typecheck` ✓, `npm run lint` ✓, `npm run build` ✓
+- **Learnings**:
+  - Lucide React already installed, provides all required icons
+  - fuse.js not installed — basic search filtering implemented, can enhance later
+  - Sticky positioning with `h-screen sticky top-0` keeps sidebar fixed while content scrolls
+  - PMRInterface wraps PatientBanner + sidebar + main content layout