diff --git a/storybook/src/stories/UILevel4.stories.tsx b/storybook/src/stories/UILevel4.stories.tsx
new file mode 100644
index 000000000..1cfc3fb7d
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+++ b/storybook/src/stories/UILevel4.stories.tsx
@@ -0,0 +1,534 @@
+/**
+ * UI Level 4 Package Stories
+ *
+ * God-Tier Builder - Application design and development interface
+ * Purple theme with schema editor, workflow designer, and code editor
+ */
+
+import React from 'react'
+import type { Meta, StoryObj } from '@storybook/react'
+
+// Tab Badge Component
+const TabBadge: React.FC<{ count: number }> = ({ count }) => (
+
+ {count}
+
+)
+
+// Config Summary Component
+const ConfigSummary: React.FC<{
+ schemas: number
+ fields: number
+ workflows: number
+ nodes: number
+ scripts: number
+}> = ({ schemas, fields, workflows, nodes, scripts }) => (
+
+
Configuration Summary
+
+
+ Data Models:
+ {schemas}
+
+
+ Total Fields:
+ {fields}
+
+
+ Workflows:
+ {workflows}
+
+
+ Workflow Nodes:
+ {nodes}
+
+
+ Lua Scripts:
+ {scripts}
+
+
+
+)
+
+// Preview Button Component
+const PreviewButton: React.FC<{ level: number }> = ({ level }) => (
+
+)
+
+// Schema Card Component
+const SchemaCard: React.FC<{
+ name: string
+ label: string
+ fieldCount: number
+ isSelected?: boolean
+ onSelect?: () => void
+ onDelete?: () => void
+}> = ({ name, label, fieldCount, isSelected, onSelect, onDelete }) => (
+
+
+
{label || name}
+
{fieldCount} fields
+
+ {onDelete && (
+
+ )}
+
+)
+
+// Builder Navigation
+const BuilderNav: React.FC = () => (
+
+)
+
+// Schema Editor Component
+const SchemaEditor: React.FC = () => (
+
+
+
+
Models
+
+
+
+ Data model definitions
+
+
+
+
+
+
+
+
+
+
Edit Model: User
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
• username (string, required)
+
• email (string, required)
+
• bio (text, optional)
+
• role (string, required)
+
• createdAt (datetime, required)
+
+
+
+
+
+)
+
+// Builder Workspace
+const BuilderWorkspace: React.FC = () => (
+
+
+ Application Builder
+
+
+ Design your application declaratively. Define schemas, create workflows, and write Lua scripts.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+)
+
+// Meta configuration
+const meta: Meta = {
+ title: 'Packages/UI Level 4',
+ parameters: {
+ package: 'ui_level4',
+ layout: 'fullscreen',
+ },
+}
+
+export default meta
+
+// Stories
+type Story = StoryObj
+
+export const Navigation: Story = {
+ render: () => ,
+}
+
+export const PreviewButtons: Story = {
+ render: () => (
+
+ ),
+}
+
+export const ConfigurationSummary: Story = {
+ render: () => (
+
+
+
+ ),
+}
+
+export const SchemaEditorPanel: Story = {
+ render: () => (
+
+
+
+ ),
+}
+
+export const FullBuilderWorkspace: Story = {
+ render: () => (
+
+
+
+
+ ),
+}
+
+export const TabsDemo: Story = {
+ render: () => (
+
+
+
+
+
+
+
+ ),
+}