diff --git a/prd.json b/prd.json
index b7f6d9c..0c182cb 100644
--- a/prd.json
+++ b/prd.json
@@ -301,7 +301,7 @@
         "Verify in browser using dev-browser skill"
       ],
       "priority": 17,
-      "passes": false,
+      "passes": true,
       "notes": ""
     },
     {
diff --git a/progress.txt b/progress.txt
index 0e6b6b9..4f7bbc8 100644
--- a/progress.txt
+++ b/progress.txt
@@ -17,6 +17,9 @@
 - Toast component in `src/components/Toast.tsx` for success/error notifications (auto-dismiss after 3s)
 - Admin operations use SUPABASE_SERVICE_ROLE_KEY (server-side only via server actions)
 - Admin users have is_admin=true in profiles table; check via .select('is_admin').eq('id', user.id).single()
+- React Flow editor is in `src/app/editor/[projectId]/` with page.tsx (server) and FlowchartEditor.tsx (client)
+- React Flow requires 'use client' and importing 'reactflow/dist/style.css'
+- Use toReactFlowNodes/toReactFlowEdges helpers to convert app types to React Flow types
 
 ---
 
@@ -260,3 +263,22 @@
   - Admin check should happen both in server component (redirect) and server action (double check)
   - Admin page uses its own layout (not dashboard layout) to have custom styling
 ---
+
+## 2026-01-21 - US-017
+- What was implemented: Editor page with React Flow canvas
+- Files changed:
+  - package.json - added reactflow dependency
+  - src/app/editor/[projectId]/page.tsx - new server component that fetches project from Supabase, handles auth/not found, renders header with back link
+  - src/app/editor/[projectId]/FlowchartEditor.tsx - new client component with React Flow canvas, Background component, type converters for nodes/edges
+  - src/app/editor/[projectId]/loading.tsx - new loading state component with spinner
+- **Learnings for future iterations:**
+  - React Flow requires 'use client' directive since it uses browser APIs
+  - Import 'reactflow/dist/style.css' for default React Flow styling
+  - Use useNodesState and useEdgesState hooks for managing nodes/edges state
+  - Convert app types (FlowchartNode, FlowchartEdge) to React Flow types with helper functions
+  - Next.js dynamic route params come as Promise in App Router 16+ (need to await params)
+  - Use notFound() from next/navigation for 404 responses
+  - React Flow canvas needs parent container with explicit height (h-full, h-screen)
+  - Background component accepts variant (Dots, Lines, Cross) and gap/size props
+  - Loading page (loading.tsx) provides automatic loading UI for async server components
+---