diff --git a/frontend/src/components/RibbonBar.tsx b/frontend/src/components/RibbonBar.tsx
index dbcc639..4044887 100644
--- a/frontend/src/components/RibbonBar.tsx
+++ b/frontend/src/components/RibbonBar.tsx
@@ -1,72 +1,18 @@
 import React from 'react';
-import { useUIMode } from '../services/uiModeService';
-import { useT } from '../i18n/strings';
 import type { RibbonBarProps, RibbonTab } from '../types/ui.types';
-import { pluginRegistry } from '../plugins';
-import { V2_TOOLS_ENABLED } from '../kernel/featureFlags';
 
 const tabs: Array<{ id: RibbonTab; label: string; svg: React.ReactNode }> = [
   { id: 'start', label: 'Start', svg: <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="m3 9 9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"/><polyline points="9 22 9 12 15 12 15 22"/></svg> },
-  { id: 'draw', label: 'Zeichnen', svg: <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M12 19l7-7 3 3-7 7-3-3z"/><path d="M18 13l-1.5-7.5L2 2l3.5 14.5L13 18l5-5z"/><path d="M2 2l7.586 7.586"/><circle cx="11" cy="11" r="2"/></svg> },
   { id: 'view', label: 'Ansicht', svg: <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M2 12s3-7 10-7 10 7 10 7-3 7-10 7-10-7-10-7z"/><circle cx="12" cy="12" r="3"/></svg> },
   { id: 'ki', label: 'KI', svg: <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M12 8V4H8"/><rect width="16" height="12" x="4" y="8" rx="2"/><path d="M2 14h2"/><path d="M20 14h2"/><path d="M15 13v2"/><path d="M9 13v2"/></svg> },
 ];
 
-/** V2-Werkzeug-Kategorien → Gruppen-Label im Zeichnen-Tab. */
-const V2_GROUP_LABELS: Record<string, string> = {
-  canvas: 'Zeichnen & Ändern',
-  format: 'Bemaßung & Text',
-  insert: 'Bestuhlung & Traversen',
-};
-
 const RibbonBar: React.FC<RibbonBarProps> = ({
   activeTab, onTabChange, onAction,
   canvasBgColor = '#1e1e2e', gridColor = '#3a3a4a', rulerEnabled = true,
   onCanvasBgColorChange, onGridColorChange, onToggleRuler,
   onIsV2ToolActive,
 }) => {
-  const uiMode = useUIMode();
-
-  /** Rendert die V2-Werkzeuge einer Kategorie als Button-Gruppe. */
-  const renderV2Group = (category: string) => {
-    const tools = pluginRegistry.getToolsV2()
-      .filter((tool) => tool.manifest.ribbonTab === category)
-      .filter((tool) => uiMode === 'pro' || (tool.manifest.tags ?? []).includes('basic'));
-    if (tools.length === 0) return null;
-    return (
-      <div className="ribbon-group">
-        <div className="ribbon-group-btns">
-          {tools.map((tool) => {
-            const isActive = onIsV2ToolActive?.(tool.manifest.id);
-            return (
-              <button
-                key={tool.manifest.id}
-                data-v2tool={tool.manifest.id}
-                title={tool.manifest.description ?? tool.manifest.label}
-                onClick={() => onAction(`v2tool:${tool.manifest.id}`)}
-                className={`ribbon-v2-btn${isActive ? ' active' : ''}`}
-              >
-                <span className="ribbon-v2-icon">{tool.manifest.icon}</span>
-                <span className="ribbon-v2-label">{tool.manifest.label}</span>
-              </button>
-            );
-          })}
-          {category === 'insert' && (
-            <button
-              className="ribbon-btn"
-              title="Stückliste Traversen"
-              onClick={() => onAction('bom')}
-            >
-              <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M3 3h18v18H3z"/><path d="M3 9h18"/><path d="M3 15h18"/><path d="M9 3v18"/></svg>
-              <span>Stückliste</span>
-            </button>
-          )}
-        </div>
-        <div className="ribbon-group-label">{V2_GROUP_LABELS[category] ?? category}</div>
-      </div>
-    );
-  };
-
   return (
     <nav className="ribbon" role="navigation" aria-label="Hauptwerkzeuge">
       <div className="ribbon-tabs" role="tablist">
@@ -147,15 +93,6 @@ const RibbonBar: React.FC<RibbonBarProps> = ({
           </>
         )}
 
-        {/* ===== ZEICHNEN TAB ===== */}
-        {activeTab === 'draw' && V2_TOOLS_ENABLED && (
-          <div className="ribbon-draw-content">
-            {renderV2Group('canvas')}
-            {renderV2Group('format')}
-            {renderV2Group('insert')}
-          </div>
-        )}
-
         {/* ===== ANSICHT TAB ===== */}
         {activeTab === 'view' && (
           <>
@@ -215,6 +152,10 @@ const RibbonBar: React.FC<RibbonBarProps> = ({
                   <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/><circle cx="9" cy="7" r="4"/><path d="M23 21v-2a4 4 0 0 0-3-3.87"/><path d="M16 3.13a4 4 0 0 1 0 7.75"/></svg>
                   <span>Gäste</span>
                 </button>
+                <button className="ribbon-btn" title="Stückliste Traversen" onClick={() => onAction('bom')}>
+                  <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round"><path d="M3 3h18v18H3z"/><path d="M3 9h18"/><path d="M3 15h18"/><path d="M9 3v18"/></svg>
+                  <span>Stückliste</span>
+                </button>
               </div>
               <div className="ribbon-group-label">Extras</div>
             </div>
diff --git a/frontend/src/types/ui.types.ts b/frontend/src/types/ui.types.ts
index 7a707c5..80daf50 100644
--- a/frontend/src/types/ui.types.ts
+++ b/frontend/src/types/ui.types.ts
@@ -9,7 +9,7 @@ import type { UserCursor } from '../crdt';
 import type { UnitType } from '../utils/format';
 
 export type ViewMode = '2d' | 'iso' | 'front' | 'top';
-export type RibbonTab = 'start' | 'draw' | 'view' | 'ki';
+export type RibbonTab = 'start' | 'view' | 'ki';
 export type RightPanel = 'tool' | 'layer' | 'library' | 'ki';
 export type Theme = 'light' | 'dark';
 export type DrawerTab = 'tool' | 'layer' | 'library' | 'ki';
diff --git a/frontend/tests/Components.test.tsx b/frontend/tests/Components.test.tsx
index 095598b..1dd225d 100644
--- a/frontend/tests/Components.test.tsx
+++ b/frontend/tests/Components.test.tsx
@@ -59,9 +59,9 @@ describe('RibbonBar', () => {
   it('should call onTabChange when clicking a tab', () => {
     const onTabChange = vi.fn();
     render(<RibbonBar activeTab="start" onTabChange={onTabChange} onAction={() => {}} />);
-    // CAD-10: Klick auf 'Zeichnen'
-    fireEvent.click(screen.getByText('Zeichnen'));
-    expect(onTabChange).toHaveBeenCalledWith('draw');
+    // CAD-13-fix: Werkzeuge nur noch in Sidebar — Ribbon hat Start/Ansicht/KI
+    fireEvent.click(screen.getByText('Ansicht'));
+    expect(onTabChange).toHaveBeenCalledWith('view');
   });
 
   it('should call onAction when clicking an action button', () => {
diff --git a/frontend/tests/uiMode.test.tsx b/frontend/tests/uiMode.test.tsx
index 57c0674..40ec0fe 100644
--- a/frontend/tests/uiMode.test.tsx
+++ b/frontend/tests/uiMode.test.tsx
@@ -57,42 +57,37 @@ describe('H1: uiModeService', () => {
   });
 });
 
-// ─── RibbonBar simple-Filter ─────────────────────────────
+// ─── simple/pro-Filter (Registry-Logik) ─────────────────
 
-describe('H1: RibbonBar simple-Filter', () => {
+describe('H1: simple/pro-Werkzeug-Filter', () => {
   beforeEach(() => {
     localStorage.clear();
     setUIMode('pro');
   });
 
-  it('pro-Modus: alle V2-Tools sichtbar (basic + pro-Tags)', async () => {
+  it('pro-Modus: alle V2-Tools registriert (basic + pro-Tags)', async () => {
     const { registerBuiltinPlugins, pluginRegistry } = await import('../src/plugins');
     registerBuiltinPlugins();
     pluginRegistry.initDefaults();
-    const RibbonBar = (await import('../src/components/RibbonBar')).default;
-    render(<RibbonBar activeTab="draw" onTabChange={() => {}} onAction={() => {}} />);
-    const all = screen.getAllByRole('button').length;
-    expect(all).toBeGreaterThan(10);
-    cleanup();
-    setUIMode('simple');
-    render(<RibbonBar activeTab="draw" onTabChange={() => {}} onAction={() => {}} />);
-    const simpleCount = screen.getAllByRole('button').length;
-    expect(simpleCount).toBeLessThan(all);
-    expect(simpleCount).toBeGreaterThan(0);
+    const all = pluginRegistry.getToolsV2();
+    expect(all.length).toBeGreaterThan(10);
+    const basics = all.filter((t) => (t.manifest.tags ?? []).includes('basic'));
+    expect(basics.length).toBeGreaterThan(0);
+    expect(basics.length).toBeLessThan(all.length);
   });
 
-  it('simple-Modus: pro-Tools (rotate/scale/mirror) fehlen, basic (line) bleibt', async () => {
+  it('simple-Modus: nur basic-Tools (rotate/scale/mirror gefiltert, line bleibt)', async () => {
     localStorage.clear();
     setUIMode('simple');
     const { registerBuiltinPlugins, pluginRegistry } = await import('../src/plugins');
     registerBuiltinPlugins();
     pluginRegistry.initDefaults();
-    const RibbonBar = (await import('../src/components/RibbonBar')).default;
-    render(<RibbonBar activeTab="draw" onTabChange={() => {}} onAction={() => {}} />);
-    const html = document.body.innerHTML;
-    expect(html).toContain('data-v2tool="line"');
-    expect(html).not.toContain('data-v2tool="rotate"');
-    expect(html).not.toContain('data-v2tool="mirror"');
+    const visible = pluginRegistry.getToolsV2()
+      .filter((t) => (t.manifest.tags ?? []).includes('basic'))
+      .map((t) => t.manifest.id);
+    expect(visible).toContain('line');
+    expect(visible).not.toContain('rotate');
+    expect(visible).not.toContain('mirror');
   });
 
   it('CommandLine-Komponente: pro-only rendering via useUIMode', async () => {