chore: version packages (#109)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

.changeset/README.md

@@ -0,0 +1,13 @@
+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in the repository](https://github.com/changesets/changesets).
+
+## Adding a changeset
+
+To add a changeset, run `pnpm changeset` in the root of the repository. This will prompt you to select
+which packages have changed and what type of version bump (major, minor, or patch) should be applied.
+
+All `@json-render/*` packages are versioned together -- a changeset for any one of them will bump all
+packages to the same version.

.changeset/config.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@3.1.1/schema.json",
+  "changelog": "@changesets/cli/changelog",
+  "commit": false,
+  "fixed": [
+    [
+      "@json-render/core",
+      "@json-render/react",
+      "@json-render/react-native",
+      "@json-render/remotion",
+      "@json-render/codegen"
+    ]
+  ],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "main",
+  "updateInternalDependencies": "patch",
+  "privatePackages": {
+    "version": false,
+    "tag": false
+  }
+}

.github/workflows/release.yml

@@ -0,0 +1,47 @@
+name: Release
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+          registry-url: "https://registry.npmjs.org"
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Create Release Pull Request or Publish
+        uses: changesets/action@v1
+        with:
+          version: pnpm ci:version
+          publish: pnpm ci:publish
+          title: "chore: version packages"
+          commit: "chore: version packages"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_VERCEL_TOKEN_ELEVATED }}

.gitignore

@@ -21,11 +21,15 @@ coverage
 # Vercel
 .vercel
 
+# Expo
+.expo/
+
 # Build Outputs
 .next/
 out/
 build
 dist
+*.tsbuildinfo
 
 
 # Debug
@@ -39,3 +43,4 @@ yarn-error.log*
 
 # opensrc - source code for packages
 opensrc/
+.env*.local

AGENTS.md

@@ -2,9 +2,31 @@
 
 Instructions for AI coding agents working with this codebase.
 
+## Package Management
+
+**Always check the latest version before installing a package.**
+
+Before adding or updating any dependency, verify the current latest version on npm:
+
+```bash
+npm view <package-name> version
+```
+
+Or check multiple packages at once:
+
+```bash
+npm view ai version
+npm view @ai-sdk/provider-utils version
+npm view zod version
+```
+
+This ensures we don't install outdated versions that may have incompatible types or missing features.
+
 ## Code Style
 
 - Do not use emojis in code or UI
+- Do not use barrel files (index.ts that re-exports from other files)
+- Use shadcn CLI to add shadcn/ui components: `pnpm dlx shadcn@latest add <component>`
 
 ## Workflow
 

README.md

@@ -1,100 +1,97 @@
 # json-render
 
-**Predictable. Guardrailed. Fast.**
+**The Generative UI framework.**
 
-Let end users generate dashboards, widgets, apps, and data visualizations from prompts — safely constrained to components you define.
+Generate dynamic, personalized UIs from prompts without sacrificing reliability. Predefined components and actions for safe, predictable output.
 
 ```bash
 npm install @json-render/core @json-render/react
+# or for mobile
+npm install @json-render/core @json-render/react-native
+# or for video
+npm install @json-render/core @json-render/remotion
 ```
 
 ## Why json-render?
 
-When users prompt for UI, you need guarantees. json-render gives AI a **constrained vocabulary** so output is always predictable:
+json-render is a **Generative UI** framework: AI generates interfaces from natural language prompts, constrained to components you define. You set the guardrails, AI generates within them:
 
-- **Guardrailed** — AI can only use components in your catalog
-- **Predictable** — JSON output matches your schema, every time
-- **Fast** — Stream and render progressively as the model responds
+- **Guardrailed** - AI can only use components in your catalog
+- **Predictable** - JSON output matches your schema, every time
+- **Fast** - Stream and render progressively as the model responds
+- **Cross-Platform** - React (web) and React Native (mobile) from the same catalog
 
 ## Quick Start
 
-### 1. Define Your Catalog (what AI can use)
+### 1. Define Your Catalog
 
 ```typescript
-import { createCatalog } from '@json-render/core';
-import { z } from 'zod';
+import { defineCatalog } from "@json-render/core";
+import { schema } from "@json-render/react";
+import { z } from "zod";
 
-const catalog = createCatalog({
+const catalog = defineCatalog(schema, {
   components: {
     Card: {
       props: z.object({ title: z.string() }),
-      hasChildren: true,
+      description: "A card container",
     },
     Metric: {
       props: z.object({
         label: z.string(),
-        valuePath: z.string(),      // Binds to your data
-        format: z.enum(['currency', 'percent', 'number']),
+        value: z.string(),
+        format: z.enum(["currency", "percent", "number"]).nullable(),
       }),
+      description: "Display a metric value",
     },
     Button: {
       props: z.object({
         label: z.string(),
-        action: ActionSchema,        // AI declares intent, you handle it
+        action: z.string(),
       }),
+      description: "Clickable button",
     },
   },
   actions: {
-    export_report: { description: 'Export dashboard to PDF' },
-    refresh_data: { description: 'Refresh all metrics' },
+    export_report: { description: "Export dashboard to PDF" },
+    refresh_data: { description: "Refresh all metrics" },
   },
 });
 ```
 
-### 2. Register Your Components (how they render)
+### 2. Define Your Components
 
 ```tsx
-const registry = {
-  Card: ({ element, children }) => (
-    <div className="card">
-      <h3>{element.props.title}</h3>
-      {children}
-    </div>
-  ),
-  Metric: ({ element }) => {
-    const value = useDataValue(element.props.valuePath);
-    return <div className="metric">{format(value)}</div>;
+import { defineRegistry, Renderer } from "@json-render/react";
+
+const { registry } = defineRegistry(catalog, {
+  components: {
+    Card: ({ props, children }) => (
+      <div className="card">
+        <h3>{props.title}</h3>
+        {children}
+      </div>
+    ),
+    Metric: ({ props }) => (
+      <div className="metric">
+        <span>{props.label}</span>
+        <span>{format(props.value, props.format)}</span>
+      </div>
+    ),
+    Button: ({ props, emit }) => (
+      <button onClick={() => emit("press")}>
+        {props.label}
+      </button>
+    ),
   },
-  Button: ({ element, onAction }) => (
-    <button onClick={() => onAction(element.props.action)}>
-      {element.props.label}
-    </button>
-  ),
-};
+});
 ```
 
-### 3. Let AI Generate
+### 3. Render AI-Generated Specs
 
 ```tsx
-import { DataProvider, ActionProvider, Renderer, useUIStream } from '@json-render/react';
-
-function Dashboard() {
-  const { tree, send } = useUIStream({ api: '/api/generate' });
-
-  return (
-    <DataProvider initialData={{ revenue: 125000, growth: 0.15 }}>
-      <ActionProvider actions={{
-        export_report: () => downloadPDF(),
-        refresh_data: () => refetch(),
-      }}>
-        <input
-          placeholder="Create a revenue dashboard..."
-          onKeyDown={(e) => e.key === 'Enter' && send(e.target.value)}
-        />
-        <Renderer tree={tree} components={registry} />
-      </ActionProvider>
-    </DataProvider>
-  );
+function Dashboard({ spec }) {
+  return <Renderer spec={spec} registry={registry} />;
 }
 ```
 
@@ -102,85 +99,168 @@ function Dashboard() {
 
 ---
 
+## Packages
+
+| Package | Description |
+|---------|-------------|
+| `@json-render/core` | Schemas, catalogs, AI prompts, dynamic props, SpecStream utilities |
+| `@json-render/react` | React renderer, contexts, hooks |
+| `@json-render/react-native` | React Native renderer with standard mobile components |
+| `@json-render/remotion` | Remotion video renderer, timeline schema |
+
+## Renderers
+
+### React (UI)
+
+```tsx
+import { defineRegistry, Renderer } from "@json-render/react";
+import { schema } from "@json-render/react";
+
+// Flat spec format (root key + elements map)
+const spec = {
+  root: "card-1",
+  elements: {
+    "card-1": {
+      type: "Card",
+      props: { title: "Hello" },
+      children: ["button-1"],
+    },
+    "button-1": {
+      type: "Button",
+      props: { label: "Click me" },
+      children: [],
+    },
+  },
+};
+
+// defineRegistry creates a type-safe component registry
+const { registry } = defineRegistry(catalog, { components });
+<Renderer spec={spec} registry={registry} />
+```
+
+### React Native (Mobile)
+
+```tsx
+import { defineCatalog } from "@json-render/core";
+import { schema } from "@json-render/react-native/schema";
+import {
+  standardComponentDefinitions,
+  standardActionDefinitions,
+} from "@json-render/react-native/catalog";
+import { defineRegistry, Renderer } from "@json-render/react-native";
+
+// 25+ standard components included
+const catalog = defineCatalog(schema, {
+  components: { ...standardComponentDefinitions },
+  actions: standardActionDefinitions,
+});
+
+const { registry } = defineRegistry(catalog, { components: {} });
+<Renderer spec={spec} registry={registry} />
+```
+
+### Remotion (Video)
+
+```tsx
+import { Player } from "@remotion/player";
+import { Renderer, schema, standardComponentDefinitions } from "@json-render/remotion";
+
+// Timeline spec format
+const spec = {
+  composition: { id: "video", fps: 30, width: 1920, height: 1080, durationInFrames: 300 },
+  tracks: [{ id: "main", name: "Main", type: "video", enabled: true }],
+  clips: [
+    { id: "clip-1", trackId: "main", component: "TitleCard", props: { title: "Hello" }, from: 0, durationInFrames: 90 }
+  ],
+  audio: { tracks: [] }
+};
+
+<Player
+  component={Renderer}
+  inputProps={{ spec }}
+  durationInFrames={spec.composition.durationInFrames}
+  fps={spec.composition.fps}
+  compositionWidth={spec.composition.width}
+  compositionHeight={spec.composition.height}
+/>
+```
+
 ## Features
 
-### Conditional Visibility
+### Streaming (SpecStream)
 
-Show/hide components based on data, auth, or complex logic:
+Stream AI responses progressively:
+
+```typescript
+import { createSpecStreamCompiler } from "@json-render/core";
+
+const compiler = createSpecStreamCompiler<MySpec>();
+
+// Process chunks as they arrive
+const { result, newPatches } = compiler.push(chunk);
+setSpec(result); // Update UI with partial result
+
+// Get final result
+const finalSpec = compiler.getResult();
+```
+
+### AI Prompt Generation
+
+Generate system prompts from your catalog:
+
+```typescript
+const systemPrompt = catalog.prompt();
+// Includes component descriptions, props schemas, available actions
+```
+
+### Conditional Visibility
 
 ```json
 {
   "type": "Alert",
   "props": { "message": "Error occurred" },
-  "visible": {
-    "and": [
-      { "path": "/form/hasError" },
-      { "not": { "path": "/form/errorDismissed" } }
-    ]
-  }
+  "visible": [
+    { "$state": "/form/hasError" },
+    { "$state": "/form/errorDismissed", "not": true }
+  ]
 }
 ```
 
-```json
-{
-  "type": "AdminPanel",
-  "visible": { "auth": "signedIn" }
-}
-```
+### Dynamic Props
 
-### Rich Actions
-
-Actions with confirmation dialogs and callbacks:
+Any prop value can be data-driven using expressions:
 
 ```json
 {
-  "type": "Button",
+  "type": "Icon",
   "props": {
-    "label": "Refund Payment",
-    "action": {
-      "name": "refund",
-      "params": {
-        "paymentId": { "path": "/selected/id" },
-        "amount": { "path": "/refund/amount" }
-      },
-      "confirm": {
-        "title": "Confirm Refund",
-        "message": "Refund ${/refund/amount} to customer?",
-        "variant": "danger"
-      },
-      "onSuccess": { "set": { "/ui/success": true } },
-      "onError": { "set": { "/ui/error": "$error.message" } }
-    }
+    "name": { "$cond": { "$state": "/activeTab", "eq": "home" }, "$then": "home", "$else": "home-outline" },
+    "color": { "$cond": { "$state": "/activeTab", "eq": "home" }, "$then": "#007AFF", "$else": "#8E8E93" }
   }
 }
 ```
 
-### Built-in Validation
+Two expression forms:
+
+- **`{ "$state": "/state/key" }`** - reads a value from the state model
+- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** - evaluates a condition (same syntax as visibility conditions) and picks a branch
+
+### Actions
+
+Components can trigger actions, including the built-in `setState` action:
 
 ```json
 {
-  "type": "TextField",
-  "props": {
-    "label": "Email",
-    "valuePath": "/form/email",
-    "checks": [
-      { "fn": "required", "message": "Email is required" },
-      { "fn": "email", "message": "Invalid email" }
-    ],
-    "validateOn": "blur"
-  }
+  "type": "Pressable",
+  "props": { "action": "setState", "actionParams": { "statePath": "/activeTab", "value": "home" } },
+  "children": ["home-icon"]
 }
 ```
 
+The `setState` action updates the state model directly, which re-evaluates visibility conditions and dynamic prop expressions.
+
 ---
 
-## Packages
-
-| Package | Description |
-|---------|-------------|
-| `@json-render/core` | Types, schemas, visibility, actions, validation |
-| `@json-render/react` | React renderer, providers, hooks |
-
 ## Demo
 
 ```bash
@@ -190,40 +270,29 @@ pnpm install
 pnpm dev
 ```
 
-- http://localhost:3000 — Docs & Playground
-- http://localhost:3001 — Example Dashboard
-
-## Project Structure
-
-```
-json-render/
-├── packages/
-│   ├── core/        → @json-render/core
-│   └── react/       → @json-render/react
-├── apps/
-│   └── web/         → Docs & Playground site
-└── examples/
-    └── dashboard/   → Example dashboard app
-```
+- http://localhost:3000 - Docs & Playground
+- http://localhost:3001 - Example Dashboard
+- http://localhost:3002 - Remotion Video Example
+- Chat Example: run `pnpm dev` in `examples/chat`
+- React Native example: run `npx expo start` in `examples/react-native`
 
 ## How It Works
 
-```
-┌─────────────┐     ┌──────────────┐     ┌─────────────┐
-│ User Prompt │────▶│  AI + Catalog│────▶│  JSON Tree  │
-│ "dashboard" │     │ (guardrailed)│     │(predictable)│
-└─────────────┘     └──────────────┘     └─────────────┘
-                                               │
-                    ┌──────────────┐            │
-                    │  Your React  │◀───────────┘
-                    │  Components  │ (streamed)
-                    └──────────────┘
+```mermaid
+flowchart LR
+    A[User Prompt] --> B[AI + Catalog]
+    B --> C[JSON Spec]
+    C --> D[Renderer]
+    
+    B -.- E([guardrailed])
+    C -.- F([predictable])
+    D -.- G([streamed])
 ```
 
-1. **Define the guardrails** — what components, actions, and data bindings AI can use
-2. **Users prompt** — end users describe what they want in natural language
-3. **AI generates JSON** — output is always predictable, constrained to your catalog
-4. **Render fast** — stream and render progressively as the model responds
+1. **Define the guardrails** - what components, actions, and data bindings AI can use
+2. **Prompt** - describe what you want in natural language
+3. **AI generates JSON** - output is always predictable, constrained to your catalog
+4. **Render fast** - stream and render progressively as the model responds
 
 ## License
 

apps/web/.env.example

@@ -7,3 +7,12 @@ AI_GATEWAY_API_KEY=
 # Override the default model used for UI generation
 # Default: anthropic/claude-haiku-4.5
 AI_GATEWAY_MODEL=anthropic/claude-haiku-4.5
+
+# Vercel KV (Rate Limiting)
+# Automatically populated when you add Vercel KV to your project
+KV_REST_API_URL=
+KV_REST_API_TOKEN=
+
+# Rate Limiting
+# RATE_LIMIT_PER_MINUTE=10
+# RATE_LIMIT_PER_DAY=100

apps/web/.gitignore

@@ -35,3 +35,4 @@ yarn-error.log*
 # typescript
 *.tsbuildinfo
 next-env.d.ts
+.env*.local

apps/web/app/(main)/docs/a2ui/page.mdx

@@ -0,0 +1,284 @@
+export const metadata = { title: "A2UI Integration" }
+
+# A2UI Integration
+
+Use `@json-render/core` to support [A2UI](https://a2ui.org) natively.
+
+<div className="rounded-lg border border-amber-500/50 bg-amber-500/10 p-4 mb-8">
+  <p className="text-sm text-amber-700 dark:text-amber-300">
+    <strong>Concept:</strong> This page demonstrates how json-render can support A2UI. The examples are illustrative and may require adaptation for production use.
+  </p>
+</div>
+
+## Native A2UI Support
+
+`@json-render/core` is schema-agnostic. Define a catalog that matches A2UI's format and build a renderer that understands it - no conversion layer needed.
+
+## Example A2UI Message
+
+A2UI uses an adjacency list model - a flat list of components with ID references. This makes it easy to patch individual components:
+
+```json
+{
+  "surfaceUpdate": {
+    "surfaceId": "main",
+    "components": [
+      {
+        "id": "header",
+        "component": {
+          "Text": {
+            "text": {"literalString": "Book Your Table"},
+            "usageHint": "h1"
+          }
+        }
+      },
+      {
+        "id": "date-picker",
+        "component": {
+          "DateTimeInput": {
+            "label": {"literalString": "Select Date"},
+            "value": {"path": "/reservation/date"},
+            "enableDate": true
+          }
+        }
+      },
+      {
+        "id": "submit-btn",
+        "component": {
+          "Button": {
+            "child": "submit-text",
+            "action": {"name": "confirm_booking"}
+          }
+        }
+      },
+      {
+        "id": "submit-text",
+        "component": {
+          "Text": {"text": {"literalString": "Confirm Reservation"}}
+        }
+      }
+    ]
+  }
+}
+```
+
+## Define the A2UI Catalog
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+import { z } from 'zod';
+
+// A2UI BoundValue schema
+const BoundString = z.object({
+  literalString: z.string().optional(),
+  path: z.string().optional(),
+}).refine(d => d.literalString || d.path);
+
+// A2UI children schema
+const Children = z.object({
+  explicitList: z.array(z.string()).optional(),
+  template: z.object({
+    dataBinding: z.string(),
+    componentId: z.string(),
+  }).optional(),
+}).refine(d => d.explicitList || d.template);
+
+export const a2uiCatalog = defineCatalog(schema, {
+  components: {
+    Text: {
+      description: 'Displays text content',
+      props: z.object({
+        text: BoundString,
+        usageHint: z.enum(['h1', 'h2', 'h3', 'body', 'caption']).optional(),
+      }),
+    },
+    Button: {
+      description: 'Interactive button',
+      props: z.object({
+        child: z.string(),
+        action: z.object({
+          name: z.string(),
+          context: z.array(z.object({
+            key: z.string(),
+            value: BoundString,
+          })).optional(),
+        }).optional(),
+      }),
+    },
+    DateTimeInput: {
+      description: 'Date/time picker',
+      props: z.object({
+        label: BoundString.optional(),
+        value: BoundString.optional(),
+        enableDate: z.boolean().optional(),
+        enableTime: z.boolean().optional(),
+      }),
+    },
+    Column: {
+      description: 'Vertical layout',
+      props: z.object({
+        children: Children,
+      }),
+    },
+    Row: {
+      description: 'Horizontal layout',
+      props: z.object({
+        children: Children,
+      }),
+    },
+    // Add more A2UI standard components...
+  },
+});
+```
+
+## Define the A2UI Schema
+
+Define the schema for A2UI message types:
+
+```typescript
+import { z } from 'zod';
+
+// Component instance in the adjacency list
+const A2UIComponent = z.object({
+  id: z.string(),
+  component: z.record(z.record(z.unknown())),
+});
+
+// Surface update message
+const SurfaceUpdate = z.object({
+  surfaceId: z.string().optional(),
+  components: z.array(A2UIComponent),
+});
+
+// State model update message
+const StateModelUpdate = z.object({
+  surfaceId: z.string().optional(),
+  path: z.string().optional(),
+  contents: z.array(z.object({
+    key: z.string(),
+    valueString: z.string().optional(),
+    valueNumber: z.number().optional(),
+    valueBoolean: z.boolean().optional(),
+    valueMap: z.array(z.unknown()).optional(),
+  })),
+});
+
+// Begin rendering message
+const BeginRendering = z.object({
+  surfaceId: z.string().optional(),
+  root: z.string(),
+  catalogId: z.string().optional(),
+});
+
+// Complete A2UI message schema
+export const A2UIMessage = z.object({
+  surfaceUpdate: SurfaceUpdate.optional(),
+  dataModelUpdate: StateModelUpdate.optional(),
+  beginRendering: BeginRendering.optional(),
+  deleteSurface: z.object({ surfaceId: z.string() }).optional(),
+});
+```
+
+## Build an A2UI Renderer
+
+Create a renderer that processes the A2UI adjacency list format:
+
+```tsx
+import { a2uiCatalog } from './catalog';
+
+// Component registry
+const components = {
+  Text: ({ text, usageHint }) => {
+    const Tag = usageHint?.startsWith('h') ? usageHint : 'p';
+    return <Tag>{text}</Tag>;
+  },
+  Button: ({ children, action, onAction }) => (
+    <button onClick={() => onAction?.(action)}>{children}</button>
+  ),
+  DateTimeInput: ({ label, value, onChange }) => (
+    <label>
+      {label}
+      <input type="date" value={value} onChange={e => onChange?.(e.target.value)} />
+    </label>
+  ),
+  Column: ({ children }) => <div className="flex flex-col gap-2">{children}</div>,
+  Row: ({ children }) => <div className="flex gap-2">{children}</div>,
+};
+
+// Render A2UI surface
+export function renderA2UI(
+  componentMap: Map<string, any>,
+  dataModel: Record<string, any>,
+  rootId: string,
+  onAction?: (action: any) => void
+) {
+  function resolveBoundValue(bound: any) {
+    if (!bound) return undefined;
+    if (bound.literalString) return bound.literalString;
+    if (bound.path) {
+      const parts = bound.path.replace(/^\//, '').split('/');
+      let value = dataModel;
+      for (const p of parts) value = value?.[p];
+      return value;
+    }
+  }
+
+  function render(id: string): React.ReactNode {
+    const comp = componentMap.get(id);
+    if (!comp) return null;
+
+    const [type, props] = Object.entries(comp.component)[0];
+    const Component = components[type];
+    if (!Component) return null;
+
+    // Resolve props
+    const resolved: any = {};
+    for (const [key, val] of Object.entries(props as any)) {
+      if (key === 'child') {
+        resolved.children = render(val as string);
+      } else if (key === 'children' && val?.explicitList) {
+        resolved.children = val.explicitList.map(render);
+      } else if (val && typeof val === 'object' && ('literalString' in val || 'path' in val)) {
+        resolved[key] = resolveBoundValue(val);
+      } else {
+        resolved[key] = val;
+      }
+    }
+
+    return <Component key={id} {...resolved} onAction={onAction} />;
+  }
+
+  return render(rootId);
+}
+```
+
+## Usage
+
+```tsx
+const [components] = useState(() => new Map());
+const [dataModel, setDataModel] = useState({});
+const [rootId, setRootId] = useState<string | null>(null);
+
+// Process A2UI messages
+function handleMessage(msg: any) {
+  if (msg.surfaceUpdate) {
+    for (const comp of msg.surfaceUpdate.components) {
+      components.set(comp.id, comp);
+    }
+  }
+  if (msg.dataModelUpdate) {
+    setDataModel(prev => ({ ...prev, ...msg.dataModelUpdate.contents }));
+  }
+  if (msg.beginRendering) {
+    setRootId(msg.beginRendering.root);
+  }
+}
+
+// Render
+{rootId && renderA2UI(components, dataModel, rootId, handleAction)}
+```
+
+## Next
+
+Learn about [Adaptive Cards integration](/docs/adaptive-cards) for another UI protocol.

apps/web/app/(main)/docs/actions/page.tsx

@@ -1,163 +0,0 @@
-import Link from "next/link";
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Actions | json-render",
-};
-
-export default function ActionsPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Actions</h1>
-      <p className="text-muted-foreground mb-8">
-        Handle user interactions safely with named actions.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Why Named Actions?</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Instead of AI generating arbitrary code, it declares <em>intent</em> by
-        name. Your application provides the implementation. This is a core
-        guardrail.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Defining Actions</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Define available actions in your catalog:
-      </p>
-      <Code lang="typescript">{`const catalog = createCatalog({
-  components: { /* ... */ },
-  actions: {
-    submit_form: {
-      params: z.object({
-        formId: z.string(),
-      }),
-      description: 'Submit a form',
-    },
-    export_data: {
-      params: z.object({
-        format: z.enum(['csv', 'pdf', 'json']),
-        filters: z.object({
-          dateRange: z.string().optional(),
-        }).optional(),
-      }),
-    },
-    navigate: {
-      params: z.object({
-        url: z.string(),
-      }),
-    },
-  },
-});`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">ActionProvider</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Provide action handlers to your app:
-      </p>
-      <Code lang="tsx">{`import { ActionProvider } from '@json-render/react';
-
-function App() {
-  const handlers = {
-    submit_form: async (params) => {
-      const response = await fetch('/api/submit', {
-        method: 'POST',
-        body: JSON.stringify({ formId: params.formId }),
-      });
-      return response.json();
-    },
-    
-    export_data: async (params) => {
-      const blob = await generateExport(params.format, params.filters);
-      downloadBlob(blob, \`export.\${params.format}\`);
-    },
-    
-    navigate: (params) => {
-      window.location.href = params.url;
-    },
-  };
-
-  return (
-    <ActionProvider handlers={handlers}>
-      {/* Your UI */}
-    </ActionProvider>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Using Actions in Components
-      </h2>
-      <Code lang="tsx">{`const Button = ({ element, onAction }) => (
-  <button onClick={() => onAction(element.props.action, {})}>
-    {element.props.label}
-  </button>
-);
-
-// Or use the useAction hook
-import { useAction } from '@json-render/react';
-
-function SubmitButton() {
-  const submitForm = useAction('submit_form');
-  
-  return (
-    <button onClick={() => submitForm({ formId: 'contact' })}>
-      Submit
-    </button>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Actions with Confirmation
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        AI can declare actions that require user confirmation:
-      </p>
-      <Code lang="json">{`{
-  "type": "Button",
-  "props": {
-    "label": "Delete Account",
-    "action": {
-      "name": "delete_account",
-      "params": { "userId": "123" },
-      "confirm": {
-        "title": "Delete Account?",
-        "message": "This action cannot be undone.",
-        "variant": "danger"
-      }
-    }
-  }
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Action Callbacks</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Handle success and error states:
-      </p>
-      <Code lang="json">{`{
-  "type": "Button",
-  "props": {
-    "label": "Save",
-    "action": {
-      "name": "save_changes",
-      "params": { "documentId": "doc-1" },
-      "onSuccess": {
-        "set": { "/ui/savedMessage": "Changes saved!" }
-      },
-      "onError": {
-        "set": { "/ui/errorMessage": "$error.message" }
-      }
-    }
-  }
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Next</h2>
-      <p className="text-sm text-muted-foreground">
-        Learn about{" "}
-        <Link
-          href="/docs/visibility"
-          className="text-foreground hover:underline"
-        >
-          conditional visibility
-        </Link>
-        .
-      </p>
-    </article>
-  );
-}

apps/web/app/(main)/docs/adaptive-cards/page.mdx

@@ -0,0 +1,407 @@
+export const metadata = { title: "Adaptive Cards Integration" }
+
+# Adaptive Cards Integration
+
+Use json-render to render [Microsoft Adaptive Cards](https://adaptivecards.io) natively.
+
+<div className="rounded-lg border border-amber-500/50 bg-amber-500/10 p-4 mb-8">
+  <p className="text-sm text-amber-700 dark:text-amber-300">
+    <strong>Concept:</strong> This page demonstrates how json-render can support Adaptive Cards. The examples are illustrative and may require adaptation for production use.
+  </p>
+</div>
+
+## Adaptive Cards Overview
+
+Adaptive Cards is a JSON-based format for platform-agnostic UI snippets. Cards have a `body` array of elements and an optional `actions` array for interactive buttons.
+
+### Example Adaptive Card
+
+```json
+{
+  "$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
+  "type": "AdaptiveCard",
+  "version": "1.5",
+  "body": [
+    {
+      "type": "TextBlock",
+      "text": "Hello, Adaptive Cards!",
+      "size": "large",
+      "weight": "bolder"
+    },
+    {
+      "type": "Image",
+      "url": "https://example.com/image.png",
+      "altText": "Example image"
+    },
+    {
+      "type": "Container",
+      "items": [
+        {
+          "type": "TextBlock",
+          "text": "This is inside a container",
+          "wrap": true
+        }
+      ]
+    },
+    {
+      "type": "ColumnSet",
+      "columns": [
+        {
+          "type": "Column",
+          "width": "auto",
+          "items": [
+            { "type": "TextBlock", "text": "Column 1" }
+          ]
+        },
+        {
+          "type": "Column",
+          "width": "stretch",
+          "items": [
+            { "type": "TextBlock", "text": "Column 2" }
+          ]
+        }
+      ]
+    },
+    {
+      "type": "Input.Text",
+      "id": "userInput",
+      "placeholder": "Enter your name",
+      "label": "Name"
+    }
+  ],
+  "actions": [
+    {
+      "type": "Action.Submit",
+      "title": "Submit"
+    },
+    {
+      "type": "Action.OpenUrl",
+      "title": "Learn More",
+      "url": "https://adaptivecards.io"
+    }
+  ]
+}
+```
+
+## Creating an Adaptive Cards Catalog
+
+Define a catalog matching the Adaptive Cards element types:
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+import { z } from 'zod';
+
+// Common Adaptive Cards properties
+const Spacing = z.enum(['none', 'small', 'default', 'medium', 'large', 'extraLarge', 'padding']);
+const HorizontalAlignment = z.enum(['left', 'center', 'right']);
+const VerticalAlignment = z.enum(['top', 'center', 'bottom']);
+const FontSize = z.enum(['small', 'default', 'medium', 'large', 'extraLarge']);
+const FontWeight = z.enum(['lighter', 'default', 'bolder']);
+const ImageSize = z.enum(['auto', 'stretch', 'small', 'medium', 'large']);
+const ImageStyle = z.enum(['default', 'person']);
+
+// Base element properties shared by most elements
+const BaseElement = {
+  id: z.string().optional(),
+  isVisible: z.boolean().optional(),
+  separator: z.boolean().optional(),
+  spacing: Spacing.optional(),
+};
+
+export const adaptiveCardsCatalog = defineCatalog(schema, {
+  components: {
+    // Root card
+    AdaptiveCard: {
+      description: 'Root Adaptive Card container',
+      props: z.object({
+        version: z.string(),
+        body: z.array(z.unknown()).optional(),
+        actions: z.array(z.unknown()).optional(),
+        fallbackText: z.string().optional(),
+        minHeight: z.string().optional(),
+        rtl: z.boolean().optional(),
+        verticalContentAlignment: VerticalAlignment.optional(),
+      }),
+    },
+
+    // Elements
+    TextBlock: {
+      description: 'Displays text with formatting options',
+      props: z.object({
+        ...BaseElement,
+        text: z.string(),
+        color: z.enum(['default', 'dark', 'light', 'accent', 'good', 'warning', 'attention']).optional(),
+        fontType: z.enum(['default', 'monospace']).optional(),
+        horizontalAlignment: HorizontalAlignment.optional(),
+        isSubtle: z.boolean().optional(),
+        maxLines: z.number().optional(),
+        size: FontSize.optional(),
+        weight: FontWeight.optional(),
+        wrap: z.boolean().optional(),
+      }),
+    },
+
+    Image: {
+      description: 'Displays an image',
+      props: z.object({
+        ...BaseElement,
+        url: z.string(),
+        altText: z.string().optional(),
+        backgroundColor: z.string().optional(),
+        height: z.string().optional(),
+        width: z.string().optional(),
+        horizontalAlignment: HorizontalAlignment.optional(),
+        size: ImageSize.optional(),
+        style: ImageStyle.optional(),
+      }),
+    },
+
+    Container: {
+      description: 'Groups elements together',
+      props: z.object({
+        ...BaseElement,
+        items: z.array(z.unknown()),
+        style: z.enum(['default', 'emphasis', 'good', 'attention', 'warning', 'accent']).optional(),
+        verticalContentAlignment: VerticalAlignment.optional(),
+        bleed: z.boolean().optional(),
+        minHeight: z.string().optional(),
+      }),
+    },
+
+    ColumnSet: {
+      description: 'Arranges columns horizontally',
+      props: z.object({
+        ...BaseElement,
+        columns: z.array(z.unknown()),
+        horizontalAlignment: HorizontalAlignment.optional(),
+        minHeight: z.string().optional(),
+      }),
+    },
+
+    Column: {
+      description: 'A column within a ColumnSet',
+      props: z.object({
+        ...BaseElement,
+        items: z.array(z.unknown()).optional(),
+        width: z.union([z.string(), z.number()]).optional(),
+        style: z.enum(['default', 'emphasis', 'good', 'attention', 'warning', 'accent']).optional(),
+        verticalContentAlignment: VerticalAlignment.optional(),
+      }),
+    },
+
+    FactSet: {
+      description: 'Displays a series of facts as key/value pairs',
+      props: z.object({
+        ...BaseElement,
+        facts: z.array(z.object({
+          title: z.string(),
+          value: z.string(),
+        })),
+      }),
+    },
+
+    // Inputs
+    'Input.Text': {
+      description: 'Text input field',
+      props: z.object({
+        ...BaseElement,
+        id: z.string(),
+        isMultiline: z.boolean().optional(),
+        maxLength: z.number().optional(),
+        placeholder: z.string().optional(),
+        label: z.string().optional(),
+        value: z.string().optional(),
+        style: z.enum(['text', 'tel', 'url', 'email', 'password']).optional(),
+        isRequired: z.boolean().optional(),
+        errorMessage: z.string().optional(),
+      }),
+    },
+
+    'Input.Number': {
+      description: 'Number input field',
+      props: z.object({
+        ...BaseElement,
+        id: z.string(),
+        max: z.number().optional(),
+        min: z.number().optional(),
+        placeholder: z.string().optional(),
+        label: z.string().optional(),
+        value: z.number().optional(),
+        isRequired: z.boolean().optional(),
+        errorMessage: z.string().optional(),
+      }),
+    },
+
+    'Input.Toggle': {
+      description: 'Toggle/checkbox input',
+      props: z.object({
+        ...BaseElement,
+        id: z.string(),
+        title: z.string(),
+        label: z.string().optional(),
+        value: z.string().optional(),
+        valueOff: z.string().optional(),
+        valueOn: z.string().optional(),
+        isRequired: z.boolean().optional(),
+      }),
+    },
+
+    'Input.ChoiceSet': {
+      description: 'Dropdown or radio/checkbox group',
+      props: z.object({
+        ...BaseElement,
+        id: z.string(),
+        choices: z.array(z.object({
+          title: z.string(),
+          value: z.string(),
+        })),
+        isMultiSelect: z.boolean().optional(),
+        style: z.enum(['compact', 'expanded']).optional(),
+        label: z.string().optional(),
+        value: z.string().optional(),
+        placeholder: z.string().optional(),
+        isRequired: z.boolean().optional(),
+      }),
+    },
+
+    // Actions
+    'Action.OpenUrl': {
+      description: 'Opens a URL',
+      props: z.object({
+        title: z.string().optional(),
+        url: z.string(),
+        iconUrl: z.string().optional(),
+      }),
+    },
+
+    'Action.Submit': {
+      description: 'Submits input data',
+      props: z.object({
+        title: z.string().optional(),
+        data: z.unknown().optional(),
+        iconUrl: z.string().optional(),
+      }),
+    },
+
+    'Action.ShowCard': {
+      description: 'Shows a card inline',
+      props: z.object({
+        title: z.string().optional(),
+        card: z.unknown(),
+        iconUrl: z.string().optional(),
+      }),
+    },
+
+    'Action.Execute': {
+      description: 'Universal action for bots',
+      props: z.object({
+        title: z.string().optional(),
+        verb: z.string().optional(),
+        data: z.unknown().optional(),
+        iconUrl: z.string().optional(),
+      }),
+    },
+  },
+});
+```
+
+## Building an Adaptive Cards Renderer
+
+Create a renderer that processes Adaptive Cards JSON. See the [A2UI integration](/docs/a2ui) page for a similar pattern. The key is mapping each Adaptive Card element type to a React component, resolving nested `items` and `columns` arrays recursively.
+
+## Usage Example
+
+Render an Adaptive Card and handle actions:
+
+```tsx
+'use client';
+
+import { AdaptiveCardRenderer } from './adaptive-card-renderer';
+
+const card = {
+  type: 'AdaptiveCard' as const,
+  version: '1.5',
+  body: [
+    {
+      type: 'TextBlock',
+      text: 'Contact Form',
+      size: 'large',
+      weight: 'bolder',
+    },
+    {
+      type: 'Input.Text',
+      id: 'name',
+      label: 'Your Name',
+      placeholder: 'Enter your name',
+    },
+    {
+      type: 'Input.Text',
+      id: 'message',
+      label: 'Message',
+      placeholder: 'Enter your message',
+      isMultiline: true,
+    },
+  ],
+  actions: [
+    {
+      type: 'Action.Submit',
+      title: 'Send',
+      data: { action: 'submitForm' },
+    },
+  ],
+};
+
+export function ContactCard() {
+  const handleAction = (action: any, inputData: Record<string, unknown>) => {
+    console.log('Action:', action);
+    console.log('Input data:', inputData);
+    
+    // Send to your backend
+    fetch('/api/submit', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ action, data: inputData }),
+    });
+  };
+
+  return <AdaptiveCardRenderer card={card} onAction={handleAction} />;
+}
+```
+
+## Handling Action.Execute for Bots
+
+For bot scenarios, handle `Action.Execute` with the verb and data:
+
+```typescript
+interface ActionExecutePayload {
+  action: {
+    type: 'Action.Execute';
+    verb: string;
+    data?: unknown;
+  };
+  inputs: Record<string, unknown>;
+}
+
+async function handleBotAction(payload: ActionExecutePayload) {
+  const response = await fetch('/api/bot/action', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      verb: payload.action.verb,
+      data: payload.action.data,
+      inputs: payload.inputs,
+    }),
+  });
+  
+  // Bot may return a new card to render
+  const result = await response.json();
+  if (result.card) {
+    return result.card; // New AdaptiveCard to render
+  }
+}
+```
+
+## Next
+
+Learn about [A2UI integration](/docs/a2ui) for another agent-driven UI protocol.

apps/web/app/(main)/docs/ag-ui/page.mdx

@@ -0,0 +1,384 @@
+export const metadata = { title: "AG-UI Integration" }
+
+# AG-UI Integration
+
+Use json-render to support [AG-UI](https://docs.copilotkit.ai/ag-ui) (Agent User Interaction Protocol) from CopilotKit.
+
+<div className="rounded-lg border border-amber-500/50 bg-amber-500/10 p-4 mb-8">
+  <p className="text-sm text-amber-700 dark:text-amber-300">
+    <strong>Concept:</strong> This page demonstrates how json-render can support AG-UI. The examples are illustrative and may require adaptation for production use.
+  </p>
+</div>
+
+## What is AG-UI?
+
+AG-UI is an open protocol for connecting AI agents to user interfaces. It provides a standardized way for agents to render UI components, handle user input, and manage state. The protocol uses events streamed over HTTP to update the UI in real-time.
+
+## AG-UI Event Types
+
+AG-UI defines several event types for agent-UI communication:
+
+- `TEXT_MESSAGE_START` / `TEXT_MESSAGE_CONTENT` / `TEXT_MESSAGE_END` — Streaming text messages
+- `TOOL_CALL_START` / `TOOL_CALL_ARGS` / `TOOL_CALL_END` — Tool/function calls
+- `STATE_SNAPSHOT` / `STATE_DELTA` — State updates
+- `CUSTOM` — Custom events for UI rendering
+
+### Example AG-UI Event Stream
+
+```json
+{"type": "RUN_STARTED", "threadId": "thread-123", "runId": "run-456"}
+{"type": "TEXT_MESSAGE_START", "messageId": "msg-1", "role": "assistant"}
+{"type": "TEXT_MESSAGE_CONTENT", "messageId": "msg-1", "delta": "Here's a dashboard for you:"}
+{"type": "TEXT_MESSAGE_END", "messageId": "msg-1"}
+{"type": "TOOL_CALL_START", "toolCallId": "tc-1", "toolCallName": "render_ui"}
+{"type": "TOOL_CALL_ARGS", "toolCallId": "tc-1", "delta": "{\"component\": \"Dashboard\", \"props\": {\"title\": \"Sales\"}}"}
+{"type": "TOOL_CALL_END", "toolCallId": "tc-1"}
+{"type": "RUN_FINISHED"}
+```
+
+## Define the AG-UI Schema
+
+Define schemas for AG-UI event types:
+
+```typescript
+import { z } from 'zod';
+
+// Base event schema
+const BaseEvent = z.object({
+  type: z.string(),
+  timestamp: z.number().optional(),
+});
+
+// Text message events
+const TextMessageStart = BaseEvent.extend({
+  type: z.literal('TEXT_MESSAGE_START'),
+  messageId: z.string(),
+  role: z.enum(['user', 'assistant']),
+});
+
+const TextMessageContent = BaseEvent.extend({
+  type: z.literal('TEXT_MESSAGE_CONTENT'),
+  messageId: z.string(),
+  delta: z.string(),
+});
+
+const TextMessageEnd = BaseEvent.extend({
+  type: z.literal('TEXT_MESSAGE_END'),
+  messageId: z.string(),
+});
+
+// Tool call events
+const ToolCallStart = BaseEvent.extend({
+  type: z.literal('TOOL_CALL_START'),
+  toolCallId: z.string(),
+  toolCallName: z.string(),
+  parentMessageId: z.string().optional(),
+});
+
+const ToolCallArgs = BaseEvent.extend({
+  type: z.literal('TOOL_CALL_ARGS'),
+  toolCallId: z.string(),
+  delta: z.string(),
+});
+
+const ToolCallEnd = BaseEvent.extend({
+  type: z.literal('TOOL_CALL_END'),
+  toolCallId: z.string(),
+});
+
+// State events
+const StateSnapshot = BaseEvent.extend({
+  type: z.literal('STATE_SNAPSHOT'),
+  snapshot: z.record(z.unknown()),
+});
+
+const StateDelta = BaseEvent.extend({
+  type: z.literal('STATE_DELTA'),
+  delta: z.array(z.object({
+    op: z.enum(['add', 'remove', 'replace']),
+    path: z.string(),
+    value: z.unknown().optional(),
+  })),
+});
+
+// Custom event for UI components
+const CustomEvent = BaseEvent.extend({
+  type: z.literal('CUSTOM'),
+  name: z.string(),
+  value: z.unknown(),
+});
+
+// Run lifecycle events
+const RunStarted = BaseEvent.extend({
+  type: z.literal('RUN_STARTED'),
+  threadId: z.string(),
+  runId: z.string(),
+});
+
+const RunFinished = BaseEvent.extend({
+  type: z.literal('RUN_FINISHED'),
+});
+
+const RunError = BaseEvent.extend({
+  type: z.literal('RUN_ERROR'),
+  message: z.string(),
+  code: z.string().optional(),
+});
+
+// Union of all events
+export const AGUIEvent = z.discriminatedUnion('type', [
+  TextMessageStart,
+  TextMessageContent,
+  TextMessageEnd,
+  ToolCallStart,
+  ToolCallArgs,
+  ToolCallEnd,
+  StateSnapshot,
+  StateDelta,
+  CustomEvent,
+  RunStarted,
+  RunFinished,
+  RunError,
+]);
+
+export type AGUIEvent = z.infer<typeof AGUIEvent>;
+```
+
+## Define the AG-UI Catalog
+
+Create a catalog for UI components that agents can render:
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+import { z } from 'zod';
+
+export const aguiCatalog = defineCatalog(schema, {
+  components: {
+    Container: {
+      description: 'A container for grouping elements',
+      props: z.object({
+        direction: z.enum(['row', 'column']).optional(),
+        gap: z.enum(['none', 'sm', 'md', 'lg']).optional(),
+        padding: z.enum(['none', 'sm', 'md', 'lg']).optional(),
+      }),
+    },
+    Card: {
+      description: 'A card with optional title',
+      props: z.object({
+        title: z.string().optional(),
+        description: z.string().optional(),
+      }),
+    },
+    Text: {
+      description: 'Text content',
+      props: z.object({
+        content: z.string(),
+        variant: z.enum(['body', 'heading', 'caption', 'code']).optional(),
+      }),
+    },
+    Metric: {
+      description: 'Displays a metric value',
+      props: z.object({
+        label: z.string(),
+        value: z.union([z.string(), z.number()]),
+        change: z.number().optional(),
+        format: z.enum(['number', 'currency', 'percent']).optional(),
+      }),
+    },
+    Button: {
+      description: 'Interactive button',
+      props: z.object({
+        label: z.string(),
+        variant: z.enum(['primary', 'secondary', 'outline', 'ghost']).optional(),
+        disabled: z.boolean().optional(),
+      }),
+    },
+    Alert: {
+      description: 'Alert message',
+      props: z.object({
+        message: z.string(),
+        type: z.enum(['info', 'success', 'warning', 'error']).optional(),
+      }),
+    },
+    // Add more components...
+  },
+
+  actions: {
+    submit: {
+      description: 'Submit form data',
+      params: z.object({ formId: z.string() }),
+    },
+    navigate: {
+      description: 'Navigate to a URL',
+      params: z.object({ url: z.string() }),
+    },
+    callback: {
+      description: 'Trigger a callback to the agent',
+      params: z.object({
+        name: z.string(),
+        data: z.record(z.unknown()).optional(),
+      }),
+    },
+  },
+});
+```
+
+## Build an AG-UI Event Processor
+
+Process AG-UI events and render UI components:
+
+```tsx
+'use client';
+
+import React, { useState, useCallback } from 'react';
+import { AGUIEvent } from './schema';
+
+interface AGUIState {
+  messages: Array<{
+    id: string;
+    role: 'user' | 'assistant';
+    content: string;
+  }>;
+  toolCalls: Map<string, {
+    name: string;
+    args: string;
+    result?: unknown;
+  }>;
+  state: Record<string, unknown>;
+  isRunning: boolean;
+}
+
+export function useAGUI() {
+  const [aguiState, setAGUIState] = useState<AGUIState>({
+    messages: [],
+    toolCalls: new Map(),
+    state: {},
+    isRunning: false,
+  });
+
+  const processEvent = useCallback((event: AGUIEvent) => {
+    switch (event.type) {
+      case 'RUN_STARTED':
+        setAGUIState(prev => ({ ...prev, isRunning: true }));
+        break;
+      case 'RUN_FINISHED':
+        setAGUIState(prev => ({ ...prev, isRunning: false }));
+        break;
+      case 'TEXT_MESSAGE_START':
+        setAGUIState(prev => ({
+          ...prev,
+          messages: [...prev.messages, {
+            id: event.messageId,
+            role: event.role,
+            content: '',
+          }],
+        }));
+        break;
+      case 'TEXT_MESSAGE_CONTENT':
+        setAGUIState(prev => ({
+          ...prev,
+          messages: prev.messages.map(msg =>
+            msg.id === event.messageId
+              ? { ...msg, content: msg.content + event.delta }
+              : msg
+          ),
+        }));
+        break;
+      case 'TOOL_CALL_START':
+        setAGUIState(prev => {
+          const toolCalls = new Map(prev.toolCalls);
+          toolCalls.set(event.toolCallId, { name: event.toolCallName, args: '' });
+          return { ...prev, toolCalls };
+        });
+        break;
+      case 'TOOL_CALL_ARGS':
+        setAGUIState(prev => {
+          const toolCalls = new Map(prev.toolCalls);
+          const tc = toolCalls.get(event.toolCallId);
+          if (tc) {
+            toolCalls.set(event.toolCallId, { ...tc, args: tc.args + event.delta });
+          }
+          return { ...prev, toolCalls };
+        });
+        break;
+      case 'STATE_SNAPSHOT':
+        setAGUIState(prev => ({ ...prev, state: event.snapshot }));
+        break;
+    }
+  }, []);
+
+  return { state: aguiState, processEvent };
+}
+```
+
+## Usage Example
+
+```tsx
+'use client';
+
+import { useAGUI } from './use-agui';
+import { renderToolCallUI } from './renderer';
+
+export function AGUIChat() {
+  const { state, processEvent } = useAGUI();
+
+  async function startRun(prompt: string) {
+    const response = await fetch('/api/agent', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ prompt }),
+    });
+
+    const reader = response.body?.getReader();
+    const decoder = new TextDecoder();
+
+    while (reader) {
+      const { done, value } = await reader.read();
+      if (done) break;
+
+      const lines = decoder.decode(value).split('\n').filter(Boolean);
+      for (const line of lines) {
+        const event = JSON.parse(line);
+        processEvent(event);
+      }
+    }
+  }
+
+  return (
+    <div className="space-y-4">
+      {state.messages.map(msg => (
+        <div key={msg.id} className={`p-3 rounded ${
+          msg.role === 'assistant' ? 'bg-muted' : 'bg-primary/10'
+        }`}>
+          {msg.content}
+        </div>
+      ))}
+
+      {Array.from(state.toolCalls.values()).map((tc, i) => (
+        <div key={i}>{renderToolCallUI(tc)}</div>
+      ))}
+
+      <form onSubmit={(e) => {
+        e.preventDefault();
+        const input = e.currentTarget.querySelector('input');
+        if (input?.value) {
+          startRun(input.value);
+          input.value = '';
+        }
+      }}>
+        <input
+          type="text"
+          placeholder="Ask the agent..."
+          className="w-full px-4 py-2 border rounded"
+          disabled={state.isRunning}
+        />
+      </form>
+    </div>
+  );
+}
+```
+
+## Next
+
+Learn about [OpenAPI integration](/docs/openapi) for rendering forms from API schemas.

apps/web/app/(main)/docs/ai-sdk/page.mdx

@@ -0,0 +1,207 @@
+export const metadata = { title: "AI SDK Integration" }
+
+# AI SDK Integration
+
+Use json-render with the [Vercel AI SDK](https://sdk.vercel.ai) for seamless streaming. json-render supports two modes: **Generate** (standalone UI) and **Chat** (UI embedded in conversation). See [Generation Modes](/docs/generation-modes) for a detailed comparison.
+
+## Installation
+
+```bash
+npm install ai @ai-sdk/react
+```
+
+## Generate Mode
+
+In generate mode, the AI outputs only JSONL patches. The entire response is a UI spec with no prose. This is the default mode and is ideal for playgrounds, builders, and dashboard generators.
+
+### API Route
+
+```typescript
+// app/api/generate/route.ts
+import { streamText } from "ai";
+import { catalog } from "@/lib/catalog";
+
+export async function POST(req: Request) {
+  const { prompt, currentTree } = await req.json();
+
+  const systemPrompt = catalog.prompt();
+
+  // Optionally include current UI state for context
+  const contextPrompt = currentTree
+    ? `\n\nCurrent UI state:\n${JSON.stringify(currentTree, null, 2)}`
+    : "";
+
+  const result = streamText({
+    model: yourModel,
+    system: systemPrompt + contextPrompt,
+    prompt,
+  });
+
+  return result.toTextStreamResponse();
+}
+```
+
+### Client
+
+Use `useUIStream` on the client to compile the JSONL stream into a spec:
+
+```tsx
+"use client";
+
+import { useUIStream, Renderer } from "@json-render/react";
+
+function GenerativeUI() {
+  const { spec, isStreaming, error, send } = useUIStream({
+    api: "/api/generate",
+  });
+
+  return (
+    <div>
+      <button
+        onClick={() => send("Create a dashboard with metrics")}
+        disabled={isStreaming}
+      >
+        {isStreaming ? "Generating..." : "Generate"}
+      </button>
+
+      {error && <p className="text-red-500">{error.message}</p>}
+
+      <Renderer spec={spec} registry={registry} loading={isStreaming} />
+    </div>
+  );
+}
+```
+
+## Chat Mode
+
+In chat mode, the AI responds conversationally and includes JSONL patches inline. Text-only replies are allowed when no UI is needed. This is ideal for chatbots, copilots, and educational assistants.
+
+### API Route
+
+Use `pipeJsonRender` to separate text from JSONL patches in the stream. Patches are emitted as data parts that the client can pick up.
+
+```typescript
+// app/api/chat/route.ts
+import { streamText } from "ai";
+import { pipeJsonRender } from "@json-render/core";
+import {
+  createUIMessageStream,
+  createUIMessageStreamResponse,
+} from "ai";
+import { catalog } from "@/lib/catalog";
+
+export async function POST(req: Request) {
+  const { messages } = await req.json();
+
+  const result = streamText({
+    model: yourModel,
+    system: catalog.prompt({ mode: "chat" }),
+    messages,
+  });
+
+  const stream = createUIMessageStream({
+    execute: async ({ writer }) => {
+      writer.merge(pipeJsonRender(result.toUIMessageStream()));
+    },
+  });
+
+  return createUIMessageStreamResponse({ stream });
+}
+```
+
+### Client
+
+Use `useChat` from the AI SDK and `useJsonRenderMessage` from json-render to extract the spec from each message:
+
+```tsx
+"use client";
+
+import { useChat } from "@ai-sdk/react";
+import { useJsonRenderMessage, Renderer } from "@json-render/react";
+
+function Chat() {
+  const { messages, input, handleInputChange, handleSubmit } = useChat({
+    api: "/api/chat",
+  });
+
+  return (
+    <div>
+      <div>
+        {messages.map((msg) => (
+          <ChatMessage key={msg.id} message={msg} />
+        ))}
+      </div>
+
+      <form onSubmit={handleSubmit}>
+        <input
+          value={input}
+          onChange={handleInputChange}
+          placeholder="Ask something..."
+        />
+        <button type="submit">Send</button>
+      </form>
+    </div>
+  );
+}
+
+function ChatMessage({ message }: { message: { parts: Array<{ type: string; text?: string; data?: unknown }> } }) {
+  const { spec, text, hasSpec } = useJsonRenderMessage(message.parts);
+
+  return (
+    <div>
+      {text && <p>{text}</p>}
+      {hasSpec && spec && (
+        <Renderer spec={spec} registry={registry} />
+      )}
+    </div>
+  );
+}
+```
+
+## Prompt Engineering
+
+The `catalog.prompt()` method creates an optimized system prompt that:
+
+- Lists all available components and their props
+- Describes available actions
+- Specifies the expected output format (JSONL-only or text + JSONL depending on mode)
+- Includes examples for better generation
+
+### Custom Rules
+
+Pass custom rules to tailor AI behavior:
+
+```typescript
+const systemPrompt = catalog.prompt({
+  customRules: [
+    "Always use Card components for grouping related content",
+    "Prefer horizontal layouts (Row) for metrics",
+    "Use consistent spacing with padding=\"md\"",
+  ],
+});
+```
+
+### Chat Mode Prompt
+
+```typescript
+const chatPrompt = catalog.prompt({ mode: "chat" });
+```
+
+In chat mode, the prompt instructs the AI to respond conversationally first, then include JSONL patches on their own lines when UI is needed. Text-only replies are allowed.
+
+## Which Mode?
+
+| | Generate | Chat |
+|---|---|---|
+| Output | JSONL only | Text + JSONL |
+| Text-only replies | No | Yes |
+| System prompt | `catalog.prompt()` | `catalog.prompt({ mode: "chat" })` |
+| Stream utility | `useUIStream` | `pipeJsonRender` + `useJsonRenderMessage` |
+| Use case | Playgrounds, builders | Chatbots, copilots |
+
+Learn more in the [Generation Modes](/docs/generation-modes) guide.
+
+## Next
+
+- Learn about [progressive streaming](/docs/streaming)
+- See the [chat example](https://github.com/vercel-labs/json-render/tree/main/examples/chat) for a complete implementation

apps/web/app/(main)/docs/ai-sdk/page.tsx

@@ -1,117 +0,0 @@
-import Link from "next/link";
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "AI SDK Integration | json-render",
-};
-
-export default function AiSdkPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">AI SDK Integration</h1>
-      <p className="text-muted-foreground mb-8">
-        Use json-render with the Vercel AI SDK for seamless streaming.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Installation</h2>
-      <Code lang="bash">npm install ai</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">API Route Setup</h2>
-      <Code lang="typescript">{`// app/api/generate/route.ts
-import { streamText } from 'ai';
-import { generateCatalogPrompt } from '@json-render/core';
-import { catalog } from '@/lib/catalog';
-
-export async function POST(req: Request) {
-  const { prompt, currentTree } = await req.json();
-  
-  const systemPrompt = generateCatalogPrompt(catalog);
-  
-  // Optionally include current UI state for context
-  const contextPrompt = currentTree 
-    ? \`\\n\\nCurrent UI state:\\n\${JSON.stringify(currentTree, null, 2)}\`
-    : '';
-
-  const result = streamText({
-    model: 'anthropic/claude-haiku-4.5',
-    system: systemPrompt + contextPrompt,
-    prompt,
-  });
-
-  return new Response(result.textStream, {
-    headers: { 
-      'Content-Type': 'text/plain; charset=utf-8',
-      'Transfer-Encoding': 'chunked',
-    },
-  });
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Client-Side Hook</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Use <code className="text-foreground">useUIStream</code> on the client:
-      </p>
-      <Code lang="tsx">{`'use client';
-
-import { useUIStream } from '@json-render/react';
-
-function GenerativeUI() {
-  const { tree, isLoading, error, generate } = useUIStream({
-    endpoint: '/api/generate',
-  });
-
-  return (
-    <div>
-      <button 
-        onClick={() => generate('Create a dashboard with metrics')}
-        disabled={isLoading}
-      >
-        {isLoading ? 'Generating...' : 'Generate'}
-      </button>
-      
-      {error && <p className="text-red-500">{error.message}</p>}
-      
-      <Renderer tree={tree} registry={registry} />
-    </div>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Prompt Engineering</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        The <code className="text-foreground">generateCatalogPrompt</code>{" "}
-        function creates an optimized prompt that:
-      </p>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-1 mb-4">
-        <li>Lists all available components and their props</li>
-        <li>Describes available actions</li>
-        <li>Specifies the expected JSON output format</li>
-        <li>Includes examples for better generation</li>
-      </ul>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Custom System Prompts
-      </h2>
-      <Code lang="typescript">{`const basePrompt = generateCatalogPrompt(catalog);
-
-const customPrompt = \`
-\${basePrompt}
-
-Additional instructions:
-- Always use Card components for grouping related content
-- Prefer horizontal layouts (Row) for metrics
-- Use consistent spacing with padding="md"
-\`;`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Next</h2>
-      <p className="text-sm text-muted-foreground">
-        Learn about{" "}
-        <Link
-          href="/docs/streaming"
-          className="text-foreground hover:underline"
-        >
-          progressive streaming
-        </Link>
-        .
-      </p>
-    </article>
-  );
-}

apps/web/app/(main)/docs/api/codegen/page.mdx

@@ -0,0 +1,141 @@
+export const metadata = { title: "@json-render/codegen API" }
+
+# @json-render/codegen
+
+Utilities for generating code from UI trees.
+
+## Tree Traversal
+
+### traverseSpec
+
+Walk the UI spec depth-first.
+
+```typescript
+function traverseSpec(
+  spec: Spec,
+  visitor: TreeVisitor,
+  startKey?: string
+): void
+
+interface TreeVisitor {
+  (element: UIElement, key: string, depth: number, parent: UIElement | null): void;
+}
+```
+
+### collectUsedComponents
+
+Get all unique component types used in a spec.
+
+```typescript
+function collectUsedComponents(spec: Spec): Set<string>
+
+// Example
+const components = collectUsedComponents(spec);
+// Set { 'Card', 'Metric', 'Chart' }
+```
+
+### collectStatePaths
+
+Get all state paths referenced in props (statePath, bindPath, etc.).
+
+```typescript
+function collectStatePaths(spec: Spec): Set<string>
+
+// Example
+const paths = collectStatePaths(spec);
+// Set { 'analytics/revenue', 'analytics/customers' }
+```
+
+### collectActions
+
+Get all action names used in the spec.
+
+```typescript
+function collectActions(spec: Spec): Set<string>
+
+// Example
+const actions = collectActions(spec);
+// Set { 'submit_form', 'refresh_data' }
+```
+
+## Serialization
+
+### serializePropValue
+
+Serialize a single value to a code string.
+
+```typescript
+function serializePropValue(
+  value: unknown,
+  options?: SerializeOptions
+): { value: string; needsBraces: boolean }
+
+// Examples
+serializePropValue("hello")
+// { value: '"hello"', needsBraces: false }
+
+serializePropValue(42)
+// { value: '42', needsBraces: true }
+
+serializePropValue({ $state: '/user/name' })
+// { value: '{ $state: "/user/name" }', needsBraces: true }
+```
+
+### serializeProps
+
+Serialize a props object to a JSX attributes string.
+
+```typescript
+function serializeProps(
+  props: Record<string, unknown>,
+  options?: SerializeOptions
+): string
+
+// Example
+serializeProps({ title: 'Dashboard', columns: 3, disabled: true })
+// 'title="Dashboard" columns={3} disabled'
+```
+
+### escapeString
+
+Escape a string for use in code.
+
+```typescript
+function escapeString(
+  str: string,
+  quotes?: 'single' | 'double'
+): string
+```
+
+## Types
+
+### GeneratedFile
+
+```typescript
+interface GeneratedFile {
+  /** File path relative to project root */
+  path: string;
+  /** File contents */
+  content: string;
+}
+```
+
+### CodeGenerator
+
+```typescript
+interface CodeGenerator {
+  /** Generate files from a UI spec */
+  generate(spec: Spec): GeneratedFile[];
+}
+```
+
+### SerializeOptions
+
+```typescript
+interface SerializeOptions {
+  /** Quote style for strings */
+  quotes?: 'single' | 'double';
+  /** Indent for objects/arrays */
+  indent?: number;
+}
+```

apps/web/app/(main)/docs/api/codegen/page.tsx

@@ -1,130 +0,0 @@
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "@json-render/codegen API | json-render",
-};
-
-export default function CodegenApiPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">@json-render/codegen</h1>
-      <p className="text-muted-foreground mb-8">
-        Utilities for generating code from UI trees.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Tree Traversal</h2>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">traverseTree</h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Walk the UI tree depth-first.
-      </p>
-      <Code lang="typescript">{`function traverseTree(
-  tree: UITree,
-  visitor: TreeVisitor,
-  startKey?: string
-): void
-
-interface TreeVisitor {
-  (element: UIElement, depth: number, parent: UIElement | null): void;
-}`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">collectUsedComponents</h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Get all unique component types used in a tree.
-      </p>
-      <Code lang="typescript">{`function collectUsedComponents(tree: UITree): Set<string>
-
-// Example
-const components = collectUsedComponents(tree);
-// Set { 'Card', 'Metric', 'Chart' }`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">collectDataPaths</h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Get all data paths referenced in props (valuePath, dataPath, bindPath,
-        etc.).
-      </p>
-      <Code lang="typescript">{`function collectDataPaths(tree: UITree): Set<string>
-
-// Example
-const paths = collectDataPaths(tree);
-// Set { 'analytics/revenue', 'analytics/customers' }`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">collectActions</h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Get all action names used in the tree.
-      </p>
-      <Code lang="typescript">{`function collectActions(tree: UITree): Set<string>
-
-// Example
-const actions = collectActions(tree);
-// Set { 'submit_form', 'refresh_data' }`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Serialization</h2>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">serializePropValue</h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Serialize a single value to a code string.
-      </p>
-      <Code lang="typescript">{`function serializePropValue(
-  value: unknown,
-  options?: SerializeOptions
-): { value: string; needsBraces: boolean }
-
-// Examples
-serializePropValue("hello")
-// { value: '"hello"', needsBraces: false }
-
-serializePropValue(42)
-// { value: '42', needsBraces: true }
-
-serializePropValue({ path: 'user/name' })
-// { value: '{ path: "user/name" }', needsBraces: true }`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">serializeProps</h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Serialize a props object to a JSX attributes string.
-      </p>
-      <Code lang="typescript">{`function serializeProps(
-  props: Record<string, unknown>,
-  options?: SerializeOptions
-): string
-
-// Example
-serializeProps({ title: 'Dashboard', columns: 3, disabled: true })
-// 'title="Dashboard" columns={3} disabled'`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">escapeString</h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Escape a string for use in code.
-      </p>
-      <Code lang="typescript">{`function escapeString(
-  str: string,
-  quotes?: 'single' | 'double'
-): string`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Types</h2>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">GeneratedFile</h3>
-      <Code lang="typescript">{`interface GeneratedFile {
-  /** File path relative to project root */
-  path: string;
-  /** File contents */
-  content: string;
-}`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">CodeGenerator</h3>
-      <Code lang="typescript">{`interface CodeGenerator {
-  /** Generate files from a UI tree */
-  generate(tree: UITree): GeneratedFile[];
-}`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">SerializeOptions</h3>
-      <Code lang="typescript">{`interface SerializeOptions {
-  /** Quote style for strings */
-  quotes?: 'single' | 'double';
-  /** Indent for objects/arrays */
-  indent?: number;
-}`}</Code>
-    </article>
-  );
-}

apps/web/app/(main)/docs/api/core/page.mdx

@@ -0,0 +1,575 @@
+export const metadata = { title: "@json-render/core API" }
+
+# @json-render/core
+
+Core types, schemas, and utilities.
+
+## defineCatalog
+
+Creates a type-safe catalog definition with schema validation.
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+
+function defineCatalog<T extends ZodType>(
+  s: T,
+  config: CatalogConfig
+): Catalog
+
+// Use the React schema for standard UI specs
+const catalog = defineCatalog(schema, {
+  components: {...},
+  actions: {...},
+});
+```
+
+### CatalogConfig
+
+```typescript
+interface CatalogConfig {
+  components: Record<string, ComponentDefinition>;
+  actions?: Record<string, ActionDefinition>;
+  functions?: Record<string, FunctionDefinition>;
+}
+
+interface ComponentDefinition {
+  props: ZodObject;         // Use .nullable() for optional props
+  slots?: string[];         // Named slots (e.g., ["default"])
+  description?: string;     // Help AI understand usage
+}
+
+interface ActionDefinition {
+  params?: ZodObject;
+  description?: string;
+}
+
+interface FunctionDefinition {
+  description?: string;
+}
+```
+
+### Catalog Instance
+
+The returned catalog provides methods for AI prompt generation, validation, and schema export:
+
+```typescript
+interface Catalog {
+  // Data
+  readonly data: CatalogConfig;         // The catalog configuration
+  readonly componentNames: string[];    // List of component names
+  readonly actionNames: string[];       // List of action names
+
+  // AI Prompt Generation
+  prompt(options?: PromptOptions): string;
+
+  // Validation
+  validate(spec: unknown): SpecValidationResult;
+  zodSchema(): z.ZodType;               // Get the Zod schema for specs
+
+  // Export
+  jsonSchema(): object;                 // Export as JSON Schema
+}
+
+interface PromptOptions {
+  system?: string;           // Custom system message intro
+  customRules?: string[];    // Additional rules to append
+  mode?: "generate" | "chat"; // Output mode (default: "generate")
+}
+
+interface SpecValidationResult<T> {
+  success: boolean;
+  data?: T;               // Validated spec (if success)
+  error?: z.ZodError;     // Validation errors (if failed)
+}
+```
+
+### Catalog Methods
+
+```typescript
+// Generate AI system prompt
+const systemPrompt = catalog.prompt({
+  customRules: ["Always use Card as root element"],
+});
+
+// Validate a spec from AI
+const result = catalog.validate(aiOutput);
+if (result.success) {
+  render(result.data);
+} else {
+  console.error(result.error);
+}
+
+// Get Zod schema for custom validation
+const schema = catalog.zodSchema();
+const parsed = schema.safeParse(aiOutput);
+
+// Export as JSON Schema (for structured outputs)
+const jsonSchema = catalog.jsonSchema();
+```
+
+## Schema System
+
+json-render uses a flexible schema system that defines both the AI output format (spec) and what catalogs must provide. Each renderer package provides its own schema (e.g., @json-render/react exports `schema`).
+
+### schema
+
+The schema for flat UI element trees. This is exported from @json-render/react.
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+
+// schema defines:
+// - Spec shape: { root: string, elements: Record<string, UIElement> }
+// - Catalog shape: { components: {...}, actions: {...} }
+
+const catalog = defineCatalog(schema, {
+  components: {
+    Card: {
+      props: z.object({ title: z.string() }),
+      slots: ["default"],
+      description: "Container card",
+    },
+  },
+  actions: {
+    submit: {
+      params: z.object({ formId: z.string() }),
+      description: "Submit a form",
+    },
+  },
+});
+```
+
+### defineSchema
+
+Create custom schemas for different output formats (e.g., page-based, block-based).
+
+```typescript
+import { defineSchema } from '@json-render/core';
+
+const mySchema = defineSchema((s) => ({
+  // What the AI outputs (spec)
+  spec: s.object({
+    title: s.string(),
+    blocks: s.array(s.object({
+      type: s.ref("catalog.blocks"),
+      content: s.any(),
+    })),
+  }),
+
+  // What the catalog must provide
+  catalog: s.object({
+    blocks: s.map({
+      props: s.zod(),
+      description: s.string(),
+    }),
+  }),
+}));
+```
+
+### Schema Builder API
+
+The schema builder provides these methods:
+
+```typescript
+// Primitive types
+s.string()           // String value
+s.number()           // Number value
+s.boolean()          // Boolean value
+s.any()              // Any value
+
+// Compound types
+s.array(item)        // Array of items
+s.object({ ... })    // Object with shape
+s.record(value)      // Record/map with value type
+
+// Catalog references (for type safety)
+s.ref("catalog.components")      // Reference to catalog key (becomes enum)
+s.propsOf("catalog.components")  // Props schema from catalog entry
+
+// Catalog definitions
+s.map({ props: s.zod(), ... })   // Map of named entries with shared shape
+s.zod()                          // Placeholder for user-provided Zod schema
+
+// Modifiers
+s.optional()         // Mark field as optional
+```
+
+## Zod Schemas
+
+Pre-built Zod schemas for common json-render types:
+
+### Dynamic Value Schemas
+
+```typescript
+import {
+  DynamicValueSchema,    // string | number | boolean | null | { $state: string }
+  DynamicStringSchema,   // string | { $state: string }
+  DynamicNumberSchema,   // number | { $state: string }
+  DynamicBooleanSchema,  // boolean | { $state: string }
+} from '@json-render/core';
+
+// Dynamic values can be literals or state path references
+type DynamicValue<T> = T | { $state: string };
+
+// Example: a prop that can be a literal or bound to state
+const schema = z.object({
+  label: DynamicStringSchema,  // "Hello" or { $state: "/user/name" }
+});
+```
+
+### Visibility Schemas
+
+```typescript
+import { VisibilityConditionSchema } from '@json-render/core';
+
+// Use in component props that need conditional rendering
+const schema = z.object({
+  visible: VisibilityConditionSchema.optional(),
+});
+```
+
+### Action Schemas
+
+```typescript
+import {
+  ActionSchema,           // Full action definition
+  ActionConfirmSchema,    // Confirmation dialog config
+  ActionOnSuccessSchema,  // Success handler config
+  ActionOnErrorSchema,    // Error handler config
+} from '@json-render/core';
+```
+
+### Validation Schemas
+
+```typescript
+import {
+  ValidationCheckSchema,   // Single validation check
+  ValidationConfigSchema,  // Full validation config with checks array
+} from '@json-render/core';
+```
+
+## SpecStream
+
+SpecStream is json-render's streaming format for progressively building specs from JSONL patches.
+
+### createSpecStreamCompiler
+
+Create a streaming compiler that incrementally builds a spec:
+
+```typescript
+import { createSpecStreamCompiler } from '@json-render/core';
+
+const compiler = createSpecStreamCompiler<MySpec>();
+
+// Process streaming chunks
+const { result, newPatches } = compiler.push(chunk);
+
+// Get final result
+const spec = compiler.getResult();
+
+// Reset for reuse
+compiler.reset();
+```
+
+### compileSpecStream
+
+Compile an entire SpecStream string at once:
+
+```typescript
+import { compileSpecStream } from '@json-render/core';
+
+const jsonl = `{"op":"add","path":"/root","value":{}}
+{"op":"add","path":"/root/type","value":"Card"}`;
+
+const spec = compileSpecStream<MySpec>(jsonl);
+```
+
+### Low-Level Utilities
+
+```typescript
+import {
+  parseSpecStreamLine,
+  applySpecStreamPatch,
+} from '@json-render/core';
+
+// Parse a single line
+const patch = parseSpecStreamLine('{"op":"add","path":"/root","value":{}}');
+
+// Apply patch to object (mutates in place)
+const obj = {};
+applySpecStreamPatch(obj, patch);
+```
+
+### applySpecPatch
+
+Apply a single SpecStream patch to a Spec object (mutates in place, returns the spec):
+
+```typescript
+import { applySpecPatch } from '@json-render/core';
+
+let spec: Spec = { root: "", elements: {} };
+applySpecPatch(spec, { op: "add", path: "/root", value: "main" });
+
+// For React state updates, spread to create a new reference:
+setSpec({ ...applySpecPatch(spec, patch) });
+```
+
+### nestedToFlat
+
+Convert a nested element tree (with inline children) into the flat `Spec` format:
+
+```typescript
+import { nestedToFlat } from '@json-render/core';
+
+const flat = nestedToFlat({
+  type: "Card",
+  props: { title: "Hello" },
+  children: [
+    { type: "Text", props: { content: "World" }, children: [] }
+  ],
+});
+// { root: "el-0", elements: { "el-0": ..., "el-1": ... } }
+```
+
+### createMixedStreamParser
+
+Parse a mixed stream of text and JSONL patches (used for Chat + GenUI mode):
+
+```typescript
+import { createMixedStreamParser } from '@json-render/core';
+
+const parser = createMixedStreamParser({
+  onText: (text) => appendToMessage(text),
+  onPatch: (patch) => applySpecPatch(spec, patch),
+});
+
+// As chunks arrive from the stream:
+for await (const chunk of stream) {
+  parser.push(chunk);
+}
+parser.flush();
+```
+
+### pipeJsonRender
+
+Pipe an AI SDK `UIMessageStream` through the json-render transform. Lines that parse as JSONL patches are emitted as `data-spec` parts; everything else passes through as text. Used in Chat mode API routes.
+
+```typescript
+import { pipeJsonRender } from '@json-render/core';
+import { createUIMessageStream, createUIMessageStreamResponse } from 'ai';
+
+const stream = createUIMessageStream({
+  execute: async ({ writer }) => {
+    writer.merge(pipeJsonRender(result.toUIMessageStream()));
+  },
+});
+return createUIMessageStreamResponse({ stream });
+```
+
+See [Generation Modes](/docs/generation-modes) for full Chat mode setup.
+
+### SpecStream Types
+
+Fully compliant with [RFC 6902](https://datatracker.ietf.org/doc/html/rfc6902):
+
+```typescript
+interface SpecStreamLine {
+  op: 'add' | 'remove' | 'replace' | 'move' | 'copy' | 'test';
+  path: string;
+  value?: unknown;  // Required for add, replace, test
+  from?: string;    // Required for move, copy
+}
+
+interface SpecStreamCompiler<T> {
+  push(chunk: string): { result: T; newPatches: SpecStreamLine[] };
+  getResult(): T;
+  getPatches(): SpecStreamLine[];
+  reset(): void;
+}
+
+interface MixedStreamCallbacks {
+  onText: (text: string) => void;
+  onPatch: (patch: SpecStreamLine) => void;
+}
+
+interface MixedStreamParser {
+  push(chunk: string): void;
+  flush(): void;
+}
+```
+
+## Utility Functions
+
+### Path Utilities
+
+```typescript
+import { getByPath, setByPath } from '@json-render/core';
+
+// Get value by JSON Pointer path
+const value = getByPath(state, '/user/name');  // "Alice"
+
+// Set value by path (mutates object)
+setByPath(state, '/user/email', 'alice@example.com');
+```
+
+### resolveDynamicValue
+
+```typescript
+import { resolveDynamicValue } from '@json-render/core';
+
+// Resolve a dynamic value against state
+const name = resolveDynamicValue("Hello", state);        // "Hello"
+const name2 = resolveDynamicValue({ $state: "/user/name" }, state);  // "Alice"
+```
+
+### findFormValue
+
+```typescript
+import { findFormValue } from '@json-render/core';
+
+// Find form values regardless of path format
+// Checks: params.name, params["form.name"], state["form.name"], state.form.name
+const value = findFormValue("name", params, state);
+```
+
+## buildUserPrompt
+
+Build structured user prompts for AI generation, with support for refinement and state context.
+
+```typescript
+import { buildUserPrompt } from '@json-render/core';
+
+function buildUserPrompt(options: UserPromptOptions): string
+
+interface UserPromptOptions {
+  prompt: string;                        // The user's text prompt
+  currentSpec?: Spec | null;             // Existing spec to refine (triggers patch-only mode)
+  state?: Record<string, unknown> | null; // Runtime state context to include
+  maxPromptLength?: number;              // Max length for user text (truncates before wrapping)
+}
+```
+
+### Fresh generation
+
+```typescript
+const userPrompt = buildUserPrompt({ prompt: "create a todo app" });
+```
+
+### Refinement (patch-only mode)
+
+When `currentSpec` is provided, the prompt instructs the AI to output only the patches needed for the change, not recreate the entire spec:
+
+```typescript
+const userPrompt = buildUserPrompt({
+  prompt: "add a dark mode toggle",
+  currentSpec: existingSpec,
+});
+```
+
+### With state context
+
+Include runtime state so the AI knows what data is available:
+
+```typescript
+const userPrompt = buildUserPrompt({
+  prompt: "show my data",
+  state: { todos: [{ text: "Buy milk" }] },
+});
+```
+
+## evaluateVisibility
+
+Evaluates a visibility condition against the state model.
+
+```typescript
+function evaluateVisibility(
+  condition: VisibilityCondition | undefined,
+  ctx: VisibilityContext
+): boolean
+
+interface VisibilityContext {
+  stateModel: StateModel;
+  repeatItem?: unknown;    // Current repeat item (inside repeat scope)
+  repeatIndex?: number;    // Current repeat array index (inside repeat scope)
+}
+
+type VisibilityCondition =
+  | { $state: string }                                    // truthiness
+  | { $state: string; not: true }                         // falsy
+  | { $state: string; eq: unknown }                       // equality
+  | { $state: string; neq: unknown }                      // inequality
+  | { $state: string; gt: number }                        // greater than
+  | { $state: string; gte: number }                       // gte
+  | { $state: string; lt: number }                        // lt
+  | { $state: string; lte: number }                       // lte
+  | { $item: string }                                     // item field (repeat scope)
+  | { $item: string; eq: unknown }                        // item field equality
+  | { $index: true }                                      // index truthiness (repeat scope)
+  | { $index: true; gt: number }                          // index comparison
+  | VisibilityCondition[]                                 // implicit AND
+  | { $and: VisibilityCondition[] }                       // explicit AND
+  | { $or: VisibilityCondition[] }                        // OR
+  | boolean;                                              // always / never
+```
+
+## Types
+
+### UIElement
+
+```typescript
+interface UIElement {
+  type: string;
+  props: Record<string, unknown>;
+  children?: string[];          // Keys of child elements
+  visible?: VisibilityCondition;
+  on?: Record<string, ActionBinding | ActionBinding[]>;  // Event bindings
+  repeat?: { statePath: string; key?: string };           // Repeat for arrays
+}
+```
+
+Elements are stored in the `elements` map keyed by string IDs. The key comes from the map, not from the element itself.
+
+### Spec (Element Tree)
+
+```typescript
+interface Spec {
+  root: string | null;                        // Key of root element
+  elements: Record<string, UIElement>;        // Flat element map
+  state?: Record<string, unknown>;            // Initial state model
+}
+```
+
+Elements are stored as a flat map with string keys. The tree structure is built by following the `children` arrays.
+
+### ActionBinding
+
+```typescript
+interface ActionBinding {
+  action: string;
+  params?: Record<string, DynamicValue>;
+  confirm?: {
+    title: string;
+    message: string;
+    variant?: 'default' | 'danger';
+  };
+  onSuccess?: { set: Record<string, unknown> };
+  onError?: { set: Record<string, unknown> };
+}
+```
+
+### ValidationSchema
+
+```typescript
+interface ValidationSchema {
+  checks: ValidationCheck[];
+  validateOn?: 'change' | 'blur' | 'submit';
+}
+
+interface ValidationCheck {
+  type: string;
+  args?: Record<string, unknown>;
+  message: string;
+}
+```

apps/web/app/(main)/docs/api/core/page.tsx

@@ -1,112 +0,0 @@
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "@json-render/core API | json-render",
-};
-
-export default function CoreApiPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">@json-render/core</h1>
-      <p className="text-muted-foreground mb-8">
-        Core types, schemas, and utilities.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">createCatalog</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Creates a catalog definition.
-      </p>
-      <Code lang="typescript">{`function createCatalog(config: CatalogConfig): Catalog
-
-interface CatalogConfig {
-  components: Record<string, ComponentDefinition>;
-  actions?: Record<string, ActionDefinition>;
-  validationFunctions?: Record<string, ValidationFunctionDef>;
-}
-
-interface ComponentDefinition {
-  props: ZodObject;
-  hasChildren?: boolean;
-  description?: string;
-}
-
-interface ActionDefinition {
-  params?: ZodObject;
-  description?: string;
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        generateCatalogPrompt
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Generates a system prompt for AI models.
-      </p>
-      <Code lang="typescript">{`function generateCatalogPrompt(catalog: Catalog): string`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">evaluateVisibility</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Evaluates a visibility condition against data and auth state.
-      </p>
-      <Code lang="typescript">{`function evaluateVisibility(
-  condition: VisibilityCondition | undefined,
-  data: Record<string, unknown>,
-  auth?: AuthState
-): boolean
-
-type VisibilityCondition =
-  | { path: string }
-  | { auth: 'signedIn' | 'signedOut' | string }
-  | { and: VisibilityCondition[] }
-  | { or: VisibilityCondition[] }
-  | { not: VisibilityCondition }
-  | { eq: [DynamicValue, DynamicValue] }
-  | { gt: [DynamicValue, DynamicValue] }
-  | { gte: [DynamicValue, DynamicValue] }
-  | { lt: [DynamicValue, DynamicValue] }
-  | { lte: [DynamicValue, DynamicValue] };`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Types</h2>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">UIElement</h3>
-      <Code lang="typescript">{`interface UIElement {
-  key: string;
-  type: string;
-  props: Record<string, unknown>;
-  children?: UIElement[];
-  visible?: VisibilityCondition;
-  validation?: ValidationSchema;
-}`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">UITree</h3>
-      <Code lang="typescript">{`interface UITree {
-  root: UIElement | null;
-  elements: Record<string, UIElement>;
-}`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">Action</h3>
-      <Code lang="typescript">{`interface Action {
-  name: string;
-  params?: Record<string, unknown>;
-  confirm?: {
-    title: string;
-    message: string;
-    variant?: 'default' | 'danger';
-  };
-  onSuccess?: { set: Record<string, unknown> };
-  onError?: { set: Record<string, unknown> };
-}`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">ValidationSchema</h3>
-      <Code lang="typescript">{`interface ValidationSchema {
-  checks: ValidationCheck[];
-  validateOn?: 'change' | 'blur' | 'submit';
-}
-
-interface ValidationCheck {
-  fn: string;
-  args?: Record<string, unknown>;
-  message: string;
-}`}</Code>
-    </article>
-  );
-}

apps/web/app/(main)/docs/api/react-native/page.mdx

@@ -0,0 +1,171 @@
+export const metadata = { title: "@json-render/react-native API" }
+
+# @json-render/react-native
+
+React Native renderer with standard components, providers, and hooks.
+
+## Standard Components
+
+### Layout
+
+| Component | Props | Description |
+|-----------|-------|-------------|
+| `Container` | `padding`, `background`, `borderRadius`, `borderColor`, `flex` | Basic wrapper with styling |
+| `Row` | `gap`, `align`, `justify`, `flex`, `wrap` | Horizontal flex layout |
+| `Column` | `gap`, `align`, `justify`, `flex` | Vertical flex layout |
+| `ScrollContainer` | `direction` | Scrollable area (vertical or horizontal) |
+| `SafeArea` | `edges` | Safe area insets for notch/home indicator |
+| `Pressable` | `action`, `actionParams` | Touchable wrapper that triggers actions |
+| `Spacer` | `size`, `flex` | Fixed or flexible spacing |
+| `Divider` | `color`, `thickness` | Thin line separator |
+
+### Content
+
+| Component | Props | Description |
+|-----------|-------|-------------|
+| `Heading` | `text`, `level`, `align`, `color` | Heading text (levels 1-6) |
+| `Paragraph` | `text`, `align`, `color` | Body text |
+| `Label` | `text`, `color`, `bold` | Small label text |
+| `Image` | `uri`, `width`, `height`, `resizeMode`, `borderRadius` | Image display |
+| `Avatar` | `uri`, `size`, `fallback` | Circular avatar |
+| `Badge` | `label`, `color`, `textColor` | Status badge |
+| `Chip` | `label`, `selected`, `color` | Tag/chip |
+
+### Input
+
+| Component | Props | Description |
+|-----------|-------|-------------|
+| `Button` | `label`, `variant`, `size`, `disabled`, `action`, `actionParams` | Pressable button |
+| `TextInput` | `placeholder`, `value` (use `$bindState`), `secure`, `keyboardType`, `multiline` | Text input field |
+| `Switch` | `checked` (use `$bindState`), `label` | Toggle switch |
+| `Checkbox` | `checked` (use `$bindState`), `label` | Checkbox with label |
+| `Slider` | `value` (use `$bindState`), `min`, `max`, `step` | Range slider |
+| `SearchBar` | `placeholder`, `value` (use `$bindState`) | Search input |
+
+### Feedback
+
+| Component | Props | Description |
+|-----------|-------|-------------|
+| `Spinner` | `size`, `color` | Loading indicator |
+| `ProgressBar` | `progress`, `color`, `trackColor` | Progress indicator |
+
+### Composite
+
+| Component | Props | Description |
+|-----------|-------|-------------|
+| `Card` | `title`, `subtitle`, `padding` | Card container |
+| `ListItem` | `title`, `subtitle`, `leading`, `trailing`, `action`, `actionParams` | List row |
+| `Modal` | `visible`, `title` | Bottom sheet modal |
+
+## Providers
+
+### StateProvider
+
+```tsx
+<StateProvider initialState={object}>
+  {children}
+</StateProvider>
+```
+
+### ActionProvider
+
+```tsx
+<ActionProvider handlers={Record<string, ActionHandler>}>
+  {children}
+</ActionProvider>
+```
+
+### VisibilityProvider
+
+```tsx
+<VisibilityProvider>
+  {children}
+</VisibilityProvider>
+```
+
+Conditions in specs use the `VisibilityCondition` format with `$state` paths (e.g. `{ "$state": "/path" }`, `{ "$state": "/path", "eq": value }`). See [visibility](/docs/visibility) for the full syntax.
+
+### ValidationProvider
+
+```tsx
+<ValidationProvider>
+  {children}
+</ValidationProvider>
+```
+
+## defineRegistry
+
+Create a type-safe component registry. Standard components are built-in; only register custom components.
+
+```tsx
+import { defineRegistry, type Components } from '@json-render/react-native';
+
+const { registry } = defineRegistry(catalog, {
+  components: {
+    Icon: ({ props }) => <Ionicons name={props.name} size={props.size ?? 24} />,
+  } as Components<typeof catalog>,
+});
+```
+
+## Hooks
+
+### useUIStream
+
+```typescript
+const {
+  spec,         // Spec | null - current UI state
+  isStreaming,  // boolean - true while streaming
+  error,        // Error | null
+  send,         // (prompt: string) => Promise<void>
+  clear,        // () => void - reset spec and error
+} = useUIStream({
+  api: string,
+  onComplete?: (spec: Spec) => void,
+  onError?: (error: Error) => void,
+});
+```
+
+### useStateStore
+
+```typescript
+const { state, get, set, update } = useStateStore();
+```
+
+### useStateValue
+
+```typescript
+const value = useStateValue(path: string);
+```
+
+### useStateBinding (deprecated)
+
+> **Deprecated.** Use `useBoundProp` with `$bindState` expressions instead.
+
+```typescript
+const [value, setValue] = useStateBinding(path: string);
+```
+
+### useActions
+
+```typescript
+const { execute } = useActions();
+```
+
+### useIsVisible
+
+```typescript
+const isVisible = useIsVisible(condition?: VisibilityCondition);
+```
+
+## Catalog Exports
+
+```typescript
+import { standardComponentDefinitions, standardActionDefinitions } from "@json-render/react-native/catalog";
+import { schema } from "@json-render/react-native/schema";
+```
+
+| Export | Purpose |
+|--------|---------|
+| `standardComponentDefinitions` | Catalog definitions for all 25+ standard components |
+| `standardActionDefinitions` | Catalog definitions for standard actions (setState, navigate) |
+| `schema` | React Native element tree schema |

apps/web/app/(main)/docs/api/react/page.mdx

@@ -0,0 +1,247 @@
+export const metadata = { title: "@json-render/react API" }
+
+# @json-render/react
+
+React components, providers, and hooks.
+
+## Providers
+
+### StateProvider
+
+```tsx
+<StateProvider initialState={object}>
+  {children}
+</StateProvider>
+```
+
+### ActionProvider
+
+```tsx
+<ActionProvider handlers={Record<string, ActionHandler>}>
+  {children}
+</ActionProvider>
+
+type ActionHandler = (params: Record<string, unknown>) => void | Promise<void>;
+```
+
+### VisibilityProvider
+
+```tsx
+<VisibilityProvider>
+  {children}
+</VisibilityProvider>
+```
+
+`VisibilityProvider` reads state from the parent `StateProvider` automatically. Conditions in specs use the `VisibilityCondition` format with `$state` paths (e.g. `{ "$state": "/path" }`, `{ "$state": "/path", "eq": value }`). See [visibility](/docs/visibility) for the full syntax.
+
+### ValidationProvider
+
+```tsx
+<ValidationProvider customFunctions={Record<string, ValidationFunction>}>
+  {children}
+</ValidationProvider>
+
+type ValidationFunction = (value: unknown, args?: object) => boolean | Promise<boolean>;
+```
+
+## defineRegistry
+
+Create a type-safe component registry from a catalog. Components receive `props`, `children`, `emit`, and `loading` with catalog-inferred types.
+
+```tsx
+import { defineRegistry } from '@json-render/react';
+
+const { registry } = defineRegistry(catalog, {
+  components: {
+    Card: ({ props, children }) => <div>{props.title}{children}</div>,
+    Button: ({ props, emit }) => (
+      <button onClick={() => emit("press")}>
+        {props.label}
+      </button>
+    ),
+  },
+});
+
+// Pass to <Renderer>
+<Renderer spec={spec} registry={registry} />
+```
+
+## Components
+
+### Renderer
+
+```tsx
+<Renderer
+  spec={Spec}           // The UI spec to render
+  registry={Registry}   // Component registry (from defineRegistry)
+  loading={boolean}     // Optional loading state
+  fallback={Component}  // Optional fallback for unknown types
+/>
+
+type Registry = Record<string, React.ComponentType<ComponentRenderProps>>;
+```
+
+### Component Props (via defineRegistry)
+
+```tsx
+interface ComponentContext<P> {
+  props: P;                                // Typed props from catalog
+  children?: React.ReactNode;              // Rendered children (for slot components)
+  emit: (event: string) => void;           // Emit a named event
+  loading?: boolean;
+  bindings?: Record<string, string>;       // State paths from $bindState/$bindItem expressions
+}
+```
+
+## Hooks
+
+### useUIStream
+
+```typescript
+const {
+  spec,         // Spec | null - current UI state
+  isStreaming,  // boolean - true while streaming
+  error,        // Error | null
+  send,         // (prompt: string, context?: Record<string, unknown>) => Promise<void>
+  clear,        // () => void - reset spec and error
+} = useUIStream({
+  api: string,                         // API endpoint URL
+  onComplete?: (spec: Spec) => void,   // Called when streaming completes
+  onError?: (error: Error) => void,    // Called when an error occurs
+});
+```
+
+### useStateStore
+
+```typescript
+const {
+  state,   // StateModel (Record<string, unknown>)
+  get,     // (path: string) => unknown
+  set,     // (path: string, value: unknown) => void
+  update,  // (updates: Record<string, unknown>) => void
+} = useStateStore();
+```
+
+### useStateValue
+
+```typescript
+const value = useStateValue(path: string);
+```
+
+### useStateBinding (deprecated)
+
+> **Deprecated.** Use `useBoundProp` with `$bindState` expressions instead.
+
+```typescript
+const [value, setValue] = useStateBinding(path: string);
+```
+
+### useActions
+
+```typescript
+const { execute } = useActions();
+// execute(binding: ActionBinding) => Promise<void>
+```
+
+### useAction
+
+```typescript
+const { execute, isLoading } = useAction(binding: ActionBinding);
+// execute() => Promise<void>
+```
+
+### useIsVisible
+
+```typescript
+const isVisible = useIsVisible(condition?: VisibilityCondition);
+```
+
+### useFieldValidation
+
+```typescript
+const {
+  state,     // FieldValidationState
+  validate,  // () => ValidationResult
+  touch,     // () => void
+  clear,     // () => void
+  errors,    // string[]
+  isValid,   // boolean
+} = useFieldValidation(path: string, config?: ValidationConfig);
+```
+
+`ValidationConfig` is `{ checks?: ValidationCheck[], validateOn?: 'change' | 'blur' | 'submit' }`.
+
+### useBoundProp
+
+Two-way binding helper for `$bindState` / `$bindItem` expressions. Returns `[value, setValue]` where `setValue` writes back to the bound state path.
+
+```typescript
+const [value, setValue] = useBoundProp<T>(
+  propValue: T | undefined,       // The already-resolved prop value
+  bindingPath: string | undefined  // From bindings?.value
+);
+```
+
+Use inside registry components:
+
+```tsx
+const Input: ComponentRenderer = ({ props, bindings }) => {
+  const [value, setValue] = useBoundProp<string>(props.value, bindings?.value);
+  return <input value={value ?? ""} onChange={(e) => setValue(e.target.value)} />;
+};
+```
+
+### Chat Hooks
+
+Two hooks are available for chat + GenUI, depending on your setup:
+
+- **`useChatUI`** -- Self-contained chat hook with its own message state, fetch logic, and mixed stream parsing. Use when you want a standalone chat experience without the Vercel AI SDK.
+- **`useJsonRenderMessage`** -- Extracts spec + text from an AI SDK `UIMessage.parts` array. Use with the Vercel AI SDK's `useChat` for full AI SDK integration.
+
+### useChatUI
+
+Hook for chat + GenUI experiences. Manages a multi-turn conversation where each assistant message can contain both text and a json-render UI spec.
+
+```typescript
+const {
+  messages,     // ChatMessage[] - all messages in the conversation
+  isStreaming,  // boolean - true while streaming
+  error,        // Error | null
+  send,         // (text: string) => Promise<void>
+  clear,        // () => void - reset conversation
+} = useChatUI({
+  api: string,                                   // API endpoint
+  onComplete?: (message: ChatMessage) => void,   // Called when streaming completes
+  onError?: (error: Error) => void,              // Called on error
+});
+
+interface ChatMessage {
+  id: string;
+  role: "user" | "assistant";
+  text: string;
+  spec: Spec | null;
+}
+```
+
+### useJsonRenderMessage
+
+Extract a spec and text content from an AI SDK message's `parts` array. Designed for integration with Vercel AI SDK's `useChat`.
+
+```typescript
+const { spec, text, hasSpec } = useJsonRenderMessage(parts: DataPart[]);
+
+// spec: Spec | null     - compiled from JSONL patches in data parts
+// text: string          - concatenated text parts
+// hasSpec: boolean      - true when spec is non-null
+```
+
+### buildSpecFromParts / getTextFromParts
+
+Standalone utilities for extracting spec and text from AI SDK message parts (non-hook versions):
+
+```typescript
+import { buildSpecFromParts, getTextFromParts } from '@json-render/react';
+
+const spec = buildSpecFromParts(message.parts);   // Spec | null
+const text = getTextFromParts(message.parts);      // string
+```

apps/web/app/(main)/docs/api/react/page.tsx

@@ -1,110 +0,0 @@
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "@json-render/react API | json-render",
-};
-
-export default function ReactApiPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">@json-render/react</h1>
-      <p className="text-muted-foreground mb-8">
-        React components, providers, and hooks.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Providers</h2>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">DataProvider</h3>
-      <Code lang="tsx">{`<DataProvider initialData={object}>
-  {children}
-</DataProvider>`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">ActionProvider</h3>
-      <Code lang="tsx">{`<ActionProvider handlers={Record<string, ActionHandler>}>
-  {children}
-</ActionProvider>
-
-type ActionHandler = (params: Record<string, unknown>) => void | Promise<void>;`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">VisibilityProvider</h3>
-      <Code lang="tsx">{`<VisibilityProvider auth={AuthState}>
-  {children}
-</VisibilityProvider>
-
-interface AuthState {
-  isSignedIn: boolean;
-  roles?: string[];
-}`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">ValidationProvider</h3>
-      <Code lang="tsx">{`<ValidationProvider functions={Record<string, ValidatorFn>}>
-  {children}
-</ValidationProvider>
-
-type ValidatorFn = (value: unknown, args?: object) => boolean | Promise<boolean>;`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Components</h2>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">Renderer</h3>
-      <Code lang="tsx">{`<Renderer
-  tree={UITree}
-  registry={ComponentRegistry}
-/>
-
-type ComponentRegistry = Record<string, React.ComponentType<ComponentProps>>;
-
-interface ComponentProps {
-  element: UIElement;
-  children?: React.ReactNode;
-  onAction: (name: string, params: object) => void;
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Hooks</h2>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">useUIStream</h3>
-      <Code lang="typescript">{`const {
-  tree,       // UITree - current UI state
-  isLoading,  // boolean - true while streaming
-  error,      // Error | null
-  generate,   // (prompt: string) => void
-  abort,      // () => void
-} = useUIStream({
-  endpoint: string,
-});`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">useData</h3>
-      <Code lang="typescript">{`const {
-  data,      // Record<string, unknown>
-  setData,   // (data: object) => void
-  getValue,  // (path: string) => unknown
-  setValue,  // (path: string, value: unknown) => void
-} = useData();`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">useDataValue</h3>
-      <Code lang="typescript">{`const value = useDataValue(path: string);`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">useDataBinding</h3>
-      <Code lang="typescript">{`const [value, setValue] = useDataBinding(path: string);`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">useActions</h3>
-      <Code lang="typescript">{`const { dispatch } = useActions();
-// dispatch(actionName: string, params: object)`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">useAction</h3>
-      <Code lang="typescript">{`const submitForm = useAction('submit_form');
-// submitForm(params: object)`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">useIsVisible</h3>
-      <Code lang="typescript">{`const isVisible = useIsVisible(condition?: VisibilityCondition);`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">useFieldValidation</h3>
-      <Code lang="typescript">{`const {
-  value,     // unknown
-  setValue,  // (value: unknown) => void
-  errors,    // string[]
-  validate,  // () => Promise<boolean>
-  isValid,   // boolean
-} = useFieldValidation(path: string, checks: ValidationCheck[]);`}</Code>
-    </article>
-  );
-}

apps/web/app/(main)/docs/api/remotion/page.mdx

@@ -0,0 +1,240 @@
+export const metadata = { title: "@json-render/remotion API" }
+
+# @json-render/remotion
+
+Remotion video renderer. Turn JSON timeline specs into video compositions.
+
+## schema
+
+The timeline schema for video specs. Use with `defineCatalog` from core.
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema, standardComponentDefinitions } from '@json-render/remotion';
+
+const catalog = defineCatalog(schema, {
+  components: standardComponentDefinitions,
+  transitions: standardTransitionDefinitions,
+  effects: standardEffectDefinitions,
+});
+```
+
+## Renderer
+
+The main composition component that renders timeline specs. Use with Remotion's Player or in a Remotion project.
+
+```tsx
+import { Player } from '@remotion/player';
+import { Renderer } from '@json-render/remotion';
+
+function VideoPlayer({ spec }) {
+  return (
+    <Player
+      component={Renderer}
+      inputProps={{ spec }}
+      durationInFrames={spec.composition.durationInFrames}
+      fps={spec.composition.fps}
+      compositionWidth={spec.composition.width}
+      compositionHeight={spec.composition.height}
+      controls
+    />
+  );
+}
+```
+
+### Custom Components
+
+Pass custom components to the Renderer:
+
+```tsx
+import { Renderer, standardComponents } from '@json-render/remotion';
+
+const customComponents = {
+  ...standardComponents,
+  MyCustomClip: ({ clip }) => <div>{clip.props.text}</div>,
+};
+
+<Player
+  component={Renderer}
+  inputProps={{ spec, components: customComponents }}
+  // ...
+/>
+```
+
+## Standard Components
+
+Pre-built video components included in the package:
+
+```typescript
+import {
+  TitleCard,      // Full-screen title with subtitle
+  ImageSlide,     // Full-screen image display
+  SplitScreen,    // Two-column layout
+  QuoteCard,      // Quote with attribution
+  StatCard,       // Large statistic display
+  LowerThird,     // Name/title overlay
+  TextOverlay,    // Centered text overlay
+  TypingText,     // Terminal typing animation
+  LogoBug,        // Corner logo watermark
+  VideoClip,      // Video playback
+} from '@json-render/remotion';
+```
+
+### TitleCard Props
+
+```typescript
+{
+  title: string;
+  subtitle?: string;
+  backgroundColor?: string;  // default: "#1a1a1a"
+  textColor?: string;        // default: "#ffffff"
+}
+```
+
+### TypingText Props
+
+```typescript
+{
+  text: string;
+  charsPerSecond?: number;   // default: 15
+  showCursor?: boolean;      // default: true
+  cursorChar?: string;       // default: "|"
+  fontFamily?: string;       // default: "monospace"
+  fontSize?: number;         // default: 48
+  textColor?: string;        // default: "#00ff00"
+  backgroundColor?: string;  // default: "#1e1e1e"
+}
+```
+
+## Catalog Definitions
+
+Pre-built definitions for creating catalogs:
+
+```typescript
+import {
+  standardComponentDefinitions,   // All standard component definitions
+  standardTransitionDefinitions,  // fade, slideLeft, slideRight, etc.
+  standardEffectDefinitions,      // kenBurns, pulseGlow, colorShift
+} from '@json-render/remotion';
+
+// Use in your catalog
+const catalog = defineCatalog(schema, {
+  components: {
+    ...standardComponentDefinitions,
+    // Add custom components
+  },
+  transitions: standardTransitionDefinitions,
+  effects: standardEffectDefinitions,
+});
+```
+
+## Hooks & Utilities
+
+### useTransition
+
+Calculate transition styles for a clip based on current frame:
+
+```typescript
+import { useTransition } from '@json-render/remotion';
+import { useCurrentFrame } from 'remotion';
+
+function MyComponent({ clip }) {
+  const frame = useCurrentFrame();
+  const transition = useTransition(clip, frame);
+  
+  return (
+    <div style={{
+      opacity: transition.opacity,
+      transform: transition.transform,
+    }}>
+      Content
+    </div>
+  );
+}
+```
+
+### ClipWrapper
+
+Automatically apply transitions to clip content:
+
+```tsx
+import { ClipWrapper } from '@json-render/remotion';
+
+function MyClip({ clip }) {
+  return (
+    <ClipWrapper clip={clip}>
+      <div>My content with automatic transitions</div>
+    </ClipWrapper>
+  );
+}
+```
+
+## Types
+
+### TimelineSpec
+
+```typescript
+interface TimelineSpec {
+  composition: {
+    id: string;
+    fps: number;
+    width: number;
+    height: number;
+    durationInFrames: number;
+  };
+  tracks: Track[];
+  clips: Clip[];
+  audio: {
+    tracks: AudioTrack[];
+  };
+}
+```
+
+### Clip
+
+```typescript
+interface Clip {
+  id: string;
+  trackId: string;
+  component: string;
+  props: Record<string, unknown>;
+  from: number;
+  durationInFrames: number;
+  transitionIn?: {
+    type: string;
+    durationInFrames: number;
+  };
+  transitionOut?: {
+    type: string;
+    durationInFrames: number;
+  };
+}
+```
+
+### TransitionStyles
+
+```typescript
+interface TransitionStyles {
+  opacity: number;
+  transform: string;
+}
+```
+
+### ComponentRegistry
+
+```typescript
+type ClipComponent = React.ComponentType<{ clip: Clip }>;
+type ComponentRegistry = Record<string, ClipComponent>;
+```
+
+## Transitions
+
+Available transition types:
+
+- `fade` - Opacity fade in/out
+- `slideLeft` - Slide from right
+- `slideRight` - Slide from left
+- `slideUp` - Slide from bottom
+- `slideDown` - Slide from top
+- `zoom` - Scale zoom in/out
+- `wipe` - Horizontal wipe

apps/web/app/(main)/docs/catalog/page.mdx

@@ -0,0 +1,100 @@
+export const metadata = { title: "Catalog" }
+
+# Catalog
+
+The catalog defines what AI can generate. It's your guardrail.
+
+## What is a Catalog?
+
+A catalog is the vocabulary for your UI. While the [schema](/docs/schemas) defines the grammar (how specs are structured), the catalog defines the vocabulary (what components and actions are available). It lists:
+
+- **Components** — UI elements AI can create (with props and optional slots)
+- **Actions** — Operations AI can trigger
+- **Functions** — Custom validation or transformation functions
+
+## Creating a Catalog
+
+`defineCatalog` is from `@json-render/core`. The `schema` import comes from your platform package (`@json-render/react` or `@json-render/react-native`) and defines the element structure the catalog targets. The catalog definition itself is framework-agnostic.
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react'; // or '@json-render/react-native'
+import { z } from 'zod';
+
+const catalog = defineCatalog(schema, {
+  components: {
+    // Define each component with its props schema
+    Card: {
+      props: z.object({
+        title: z.string(),
+        description: z.string().nullable(),
+        padding: z.enum(['sm', 'md', 'lg']).nullable(),
+      }),
+      slots: ["default"], // Can contain other components
+      description: "Container card for grouping content",
+    },
+    
+    Metric: {
+      props: z.object({
+        label: z.string(),
+        value: z.union([z.string(), z.number()]),
+        format: z.enum(['currency', 'percent', 'number']),
+      }),
+      description: "Display a single metric value",
+    },
+  },
+  
+  actions: {
+    submit_form: {
+      params: z.object({
+        formId: z.string(),
+      }),
+      description: 'Submit a form',
+    },
+    
+    export_data: {
+      params: z.object({
+        format: z.enum(['csv', 'pdf', 'json']),
+      }),
+      description: 'Export data in various formats',
+    },
+  },
+});
+```
+
+## Component Definition
+
+Each component in the catalog has:
+
+```typescript
+{
+  props: z.object({...}),  // Zod schema for props (use .nullable() for optional)
+  slots?: string[],        // Named slots for children (e.g., ["default"])
+  description?: string,    // Help AI understand when to use it
+}
+```
+
+Use `slots: ["default"]` for components that can contain children. The slot name corresponds to where child elements are rendered.
+
+## Generating AI Prompts
+
+Use the `catalog.prompt()` method to generate a system prompt for AI:
+
+```typescript
+// Generate a system prompt from your catalog
+const systemPrompt = catalog.prompt();
+
+// Or with custom rules for the AI
+const customPrompt = catalog.prompt({
+  customRules: [
+    "Always use Card as the root element for forms",
+    "Group related inputs in a Stack with direction=vertical",
+  ],
+});
+
+// Pass this to your AI model as the system prompt
+```
+
+## Next
+
+Learn how to [register components](/docs/registry) in your registry.

apps/web/app/(main)/docs/catalog/page.tsx

@@ -1,120 +0,0 @@
-import Link from "next/link";
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Catalog | json-render",
-};
-
-export default function CatalogPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Catalog</h1>
-      <p className="text-muted-foreground mb-8">
-        The catalog defines what AI can generate. It&apos;s your guardrail.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">What is a Catalog?</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        A catalog is a schema that defines:
-      </p>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-1 mb-4">
-        <li>
-          <strong className="text-foreground">Components</strong> — UI elements
-          AI can create
-        </li>
-        <li>
-          <strong className="text-foreground">Actions</strong> — Operations AI
-          can trigger
-        </li>
-        <li>
-          <strong className="text-foreground">Validation Functions</strong> —
-          Custom validators for form inputs
-        </li>
-      </ul>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Creating a Catalog</h2>
-      <Code lang="typescript">{`import { createCatalog } from '@json-render/core';
-import { z } from 'zod';
-
-const catalog = createCatalog({
-  components: {
-    // Define each component with its props schema
-    Card: {
-      props: z.object({
-        title: z.string(),
-        description: z.string().nullable(),
-        padding: z.enum(['sm', 'md', 'lg']).default('md'),
-      }),
-      hasChildren: true, // Can contain other components
-    },
-    
-    Metric: {
-      props: z.object({
-        label: z.string(),
-        valuePath: z.string(), // JSON Pointer to data
-        format: z.enum(['currency', 'percent', 'number']),
-      }),
-    },
-  },
-  
-  actions: {
-    submit_form: {
-      params: z.object({
-        formId: z.string(),
-      }),
-      description: 'Submit a form',
-    },
-    
-    export_data: {
-      params: z.object({
-        format: z.enum(['csv', 'pdf', 'json']),
-      }),
-    },
-  },
-  
-  validationFunctions: {
-    isValidEmail: {
-      description: 'Validates email format',
-    },
-    isPhoneNumber: {
-      description: 'Validates phone number',
-    },
-  },
-});`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Component Definition</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Each component in the catalog has:
-      </p>
-      <Code lang="typescript">{`{
-  props: z.object({...}),  // Zod schema for props
-  hasChildren?: boolean,    // Can it have children?
-  description?: string,     // Help AI understand when to use it
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Generating AI Prompts
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Use <code className="text-foreground">generateCatalogPrompt</code> to
-        create a system prompt for AI:
-      </p>
-      <Code lang="typescript">{`import { generateCatalogPrompt } from '@json-render/core';
-
-const systemPrompt = generateCatalogPrompt(catalog);
-// Pass this to your AI model as the system prompt`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Next</h2>
-      <p className="text-sm text-muted-foreground">
-        Learn how to{" "}
-        <Link
-          href="/docs/components"
-          className="text-foreground hover:underline"
-        >
-          register React components
-        </Link>{" "}
-        for your catalog.
-      </p>
-    </article>
-  );
-}

apps/web/app/(main)/docs/changelog/page.mdx

@@ -0,0 +1,425 @@
+export const metadata = { title: "Changelog" }
+
+# Changelog
+
+Notable changes and updates to json-render.
+
+## v0.6.0
+
+February 2026
+
+### New: Chat Mode (Inline GenUI)
+
+json-render now supports two generation modes: **Generate** (JSONL-only, the default) and **Chat** (text + JSONL inline). Chat mode lets the AI respond conversationally with embedded UI specs, ideal for chatbots and copilot experiences.
+
+```typescript
+// Generate mode (default) — AI outputs only JSONL
+const prompt = catalog.prompt();
+
+// Chat mode — AI outputs text + JSONL inline
+const chatPrompt = catalog.prompt({ mode: "chat" });
+```
+
+On the server, `pipeJsonRender()` separates text from JSONL patches in a mixed stream:
+
+```typescript
+import { pipeJsonRender } from "@json-render/core";
+import { createUIMessageStream, createUIMessageStreamResponse } from "ai";
+
+const stream = createUIMessageStream({
+  execute: async ({ writer }) => {
+    writer.merge(pipeJsonRender(result.toUIMessageStream()));
+  },
+});
+return createUIMessageStreamResponse({ stream });
+```
+
+On the client, `useJsonRenderMessage` extracts the spec and text from message parts:
+
+```tsx
+import { useJsonRenderMessage } from "@json-render/react";
+
+function ChatMessage({ message }) {
+  const { spec, text, hasSpec } = useJsonRenderMessage(message.parts);
+  return (
+    <div>
+      {text && <Markdown>{text}</Markdown>}
+      {hasSpec && <Renderer spec={spec} registry={registry} />}
+    </div>
+  );
+}
+```
+
+### New: AI SDK Integration
+
+First-class Vercel AI SDK support with typed data parts and stream utilities.
+
+- `SpecDataPart` type for `data-spec` stream parts (patch, flat, nested payloads)
+- `SPEC_DATA_PART` / `SPEC_DATA_PART_TYPE` constants for type-safe part filtering
+- `createJsonRenderTransform()` low-level TransformStream for custom pipelines
+- `createMixedStreamParser()` for parsing mixed text + JSONL streams
+
+### New: Two-Way Binding
+
+Props can now use `$bindState` and `$bindItem` expressions for two-way data binding. The renderer resolves bindings and passes a `bindings` map to components, enabling write-back to state without custom `valuePath` props.
+
+```json
+{
+  "type": "Input",
+  "props": { "label": "Email", "value": { "$bindState": "/form/email" } }
+}
+```
+
+```tsx
+import { useBoundProp } from "@json-render/react";
+
+Input: ({ props, bindings }) => {
+  const [value, setValue] = useBoundProp<string>(props.value, bindings?.value);
+  return <input value={value ?? ""} onChange={(e) => setValue(e.target.value)} />;
+}
+```
+
+### New: Expression-Based Props and Visibility
+
+All dynamic expressions now use structured `$state`, `$item`, and `$index` objects instead of string token rewriting. This is simpler, more explicit, and works for both props and visibility conditions.
+
+**Props:**
+
+```json
+{ "title": { "$state": "/user/name" } }
+{ "label": { "$item": "title" } }
+{ "position": { "$index": true } }
+```
+
+**Visibility:**
+
+```json
+{ "$state": "/isAdmin" }
+{ "$state": "/role", "eq": "admin" }
+[{ "$state": "/isAdmin" }, { "$state": "/feature" }]
+{ "$or": [{ "$state": "/roleA" }, { "$state": "/roleB" }] }
+{ "$item": "isActive" }
+{ "$index": true, "gt": 0 }
+```
+
+Comparison operators: `eq`, `neq`, `gt`, `gte`, `lt`, `lte`, `not`.
+
+### New: React Chat Hooks
+
+- `useChatUI()` — full chat hook with message history, streaming, and spec extraction
+- `useJsonRenderMessage()` — extract spec + text from a message's parts array
+- `buildSpecFromParts()` / `getTextFromParts()` — utilities for working with AI SDK message parts
+- `useBoundProp()` — two-way binding hook for `$bindState` / `$bindItem`
+
+### New: Chat Example
+
+Full-featured chat example (`examples/chat`) with AI agent, tool calls (crypto, GitHub, Hacker News, weather, search), theme toggle, and streaming inline UI generation.
+
+### Improved: Renderer Performance
+
+- `ElementRenderer` is now `React.memo`'d for better performance with repeat lists
+- `emit` is always defined (never `undefined`)
+- Repeat scope passes the actual item object, eliminating string token rewriting
+
+### Improved: Utilities
+
+- `applySpecPatch()` — typed wrapper for applying a single patch to a Spec
+- `nestedToFlat()` — convert nested tree specs to flat format
+- `resolveBindings()` / `resolveActionParam()` — resolve binding paths and action params
+
+### Breaking Changes
+
+- `{ $path }` and `{ path }` replaced by `{ $state }`, `{ $item }`, `{ $index }` in props
+- Visibility: `{ path }` -> `{ $state }`, `{ and/or/not }` -> `{ $and/$or }` with `not` as operator flag
+- `DynamicValue`: `{ path: string }` -> `{ $state: string }`
+- `repeat.path` -> `repeat.statePath`
+- Action params: `path` -> `statePath` in setState action
+- `actionHandlers` -> `handlers` on `JSONUIProvider` / `ActionProvider`
+- `AuthState` and `{ auth }` visibility conditions removed (model auth as regular state)
+- Legacy catalog API removed: `createCatalog`, `generateCatalogPrompt`, `generateSystemPrompt`
+- React exports removed: `createRendererFromCatalog`, `rewriteRepeatTokens`
+- Codegen: `traverseTree` -> `traverseSpec`
+
+See the [Migration Guide](/docs/migration) for detailed upgrade instructions.
+
+---
+
+## v0.5.0
+
+February 2026
+
+### New: @json-render/react-native
+
+Full React Native renderer with 25+ standard components, data binding, visibility, actions, and dynamic props. Build AI-generated native mobile UIs with the same catalog-driven approach as web.
+
+```tsx
+import { defineCatalog } from "@json-render/core";
+import { schema } from "@json-render/react-native/schema";
+import {
+  standardComponentDefinitions,
+  standardActionDefinitions,
+} from "@json-render/react-native/catalog";
+import { defineRegistry, Renderer } from "@json-render/react-native";
+
+const catalog = defineCatalog(schema, {
+  components: { ...standardComponentDefinitions },
+  actions: standardActionDefinitions,
+});
+
+const { registry } = defineRegistry(catalog, { components: {} });
+
+<Renderer spec={spec} registry={registry} />
+```
+
+Includes standard components for layout (Container, Row, Column, ScrollContainer, SafeArea, Pressable, Spacer, Divider), content (Heading, Paragraph, Label, Image, Avatar, Badge, Chip), input (Button, TextInput, Switch, Checkbox, Slider, SearchBar), feedback (Spinner, ProgressBar), and composite (Card, ListItem, Modal).
+
+### New: Event System
+
+Components now use `emit` to fire named events instead of directly dispatching actions. The element's `on` field maps events to action bindings, decoupling component logic from action handling.
+
+```tsx
+// Component emits a named event
+Button: ({ props, emit }) => (
+  <button onClick={() => emit("press")}>{props.label}</button>
+),
+
+// Element spec maps events to actions
+{
+  "type": "Button",
+  "props": { "label": "Submit" },
+  "on": { "press": { "action": "submit", "params": { "formId": "main" } } }
+}
+```
+
+### New: Repeat/List Rendering
+
+Elements can now iterate over state arrays using the `repeat` field. Child elements use `{ "$item": "field" }` to read from the current item and `{ "$index": true }` for the current array index.
+
+```json
+{
+  "type": "Column",
+  "repeat": { "statePath": "/posts", "key": "id" },
+  "children": ["post-card"]
+}
+```
+
+```json
+{
+  "type": "Card",
+  "props": { "title": { "$item": "title" } }
+}
+```
+
+### New: User Prompt Builder
+
+Build structured user prompts with optional spec refinement and state context:
+
+```typescript
+import { buildUserPrompt } from "@json-render/core";
+
+// Fresh generation
+buildUserPrompt({ prompt: "create a todo app" });
+
+// Refinement (patch-only mode)
+buildUserPrompt({ prompt: "add a toggle", currentSpec: spec });
+
+// With runtime state
+buildUserPrompt({ prompt: "show data", state: { todos: [] } });
+```
+
+### New: Spec Validation
+
+Validate spec structure and auto-fix common issues:
+
+```typescript
+import { validateSpec, autoFixSpec } from "@json-render/core";
+
+const { valid, issues } = validateSpec(spec);
+const fixed = autoFixSpec(spec);
+```
+
+### Improved: State Management
+
+`DataProvider` has been renamed to `StateProvider` with a clearer API. State is now a first-class part of specs. Elements can bind to state via `$state` expressions, and the built-in `setState` action updates state directly.
+
+### Improved: AI Prompts
+
+Schema prompts now include streaming best practices, repeat/list examples, and state patching guidance. Schemas can also define `defaultRules` that are always included in generated prompts.
+
+### Improved: Documentation
+
+- All documentation pages migrated to MDX
+- AI-powered documentation chat
+- Dynamic Open Graph images for all docs pages
+- Improved playground
+
+### Breaking Changes
+
+- `DataProvider` renamed to `StateProvider`
+- `useData` renamed to `useStateStore`, `useDataValue` to `useStateValue`, `useDataBinding` to `useStateBinding`
+- `onAction` renamed to `emit` in component context
+- `DataModel` type renamed to `StateModel`
+- `Action` type renamed to `ActionBinding` (old name still available but deprecated)
+
+---
+
+## v0.4.0
+
+February 2026
+
+### New: Custom Schema System
+
+Create custom output formats with `defineSchema`. Each renderer now defines its own schema, enabling completely different spec formats for different use cases.
+
+```typescript
+import { defineSchema } from "@json-render/core";
+
+const mySchema = defineSchema((s) => ({
+  spec: s.object({
+    pages: s.array(s.object({
+      title: s.string(),
+      blocks: s.array(s.ref("catalog.blocks")),
+    })),
+  }),
+  catalog: s.object({
+    blocks: s.map({ props: s.zod(), description: s.string() }),
+  }),
+}), {
+  promptTemplate: myPromptTemplate,
+});
+```
+
+### New: Component Slots
+
+Components can now define which slots they accept. Use `["default"]` for regular children, or named slots like `["header", "footer"]` for more complex layouts.
+
+```typescript
+const catalog = defineCatalog(schema, {
+  components: {
+    Card: {
+      props: z.object({ title: z.string() }),
+      slots: ["default"],  // accepts children
+      description: "A card container",
+    },
+    Layout: {
+      props: z.object({}),
+      slots: ["header", "content", "footer"],  // named slots
+      description: "Page layout with header, content, footer",
+    },
+  },
+});
+```
+
+### New: AI Prompt Generation
+
+Catalogs now generate AI system prompts automatically with `catalog.prompt()`. The prompt includes all component definitions, props schemas, and action descriptions - ensuring the AI only generates valid specs.
+
+```typescript
+import { defineCatalog } from "@json-render/core";
+import { schema } from "@json-render/react/schema";
+
+const catalog = defineCatalog(schema, {
+  components: { /* ... */ },
+  actions: { /* ... */ },
+});
+
+// Generate system prompt for AI
+const systemPrompt = catalog.prompt();
+
+// Use with any AI SDK
+const result = await streamText({
+  model: "claude-haiku-4.5",
+  system: systemPrompt,
+  prompt: userMessage,
+});
+```
+
+### New: @json-render/remotion
+
+Generate AI-powered videos with Remotion. Define video catalogs, stream timeline specs, and render with the Remotion Player.
+
+```tsx
+import { Player } from "@remotion/player";
+import { Renderer, schema, standardComponentDefinitions } from "@json-render/remotion";
+
+const catalog = defineCatalog(schema, {
+  components: standardComponentDefinitions,
+  transitions: standardTransitionDefinitions,
+});
+
+<Player
+  component={Renderer}
+  inputProps={{ spec }}
+  durationInFrames={spec.composition.durationInFrames}
+  fps={spec.composition.fps}
+  compositionWidth={spec.composition.width}
+  compositionHeight={spec.composition.height}
+/>
+```
+
+Includes 10 standard video components (TitleCard, TypingText, SplitScreen, etc.), 7 transition types, and the ClipWrapper utility for custom components.
+
+### New: SpecStream
+
+SpecStream is json-render's streaming format for progressively building specs from JSONL patches. The new compiler API makes it easy to process streaming AI responses.
+
+```typescript
+import { createSpecStreamCompiler } from "@json-render/core";
+
+const compiler = createSpecStreamCompiler<MySpec>();
+
+// Process streaming chunks
+const { result, newPatches } = compiler.push(chunk);
+setSpec(result); // Update UI with partial result
+```
+
+### Improved: Dashboard Example
+
+The dashboard example is now a full-featured accounting dashboard with:
+
+- Persistent SQLite database with Drizzle ORM
+- RESTful API for customers, invoices, expenses, accounts
+- Draggable widget reordering
+- AI-powered widget generation with streaming
+- Real data binding to database records
+
+### Improved: Documentation
+
+- Interactive playground for testing specs
+- New guides: Custom Schema, Streaming, Code Export
+- Full API reference for all packages
+- Integration guides: A2UI, AG-UI, Adaptive Cards, OpenAPI
+
+### Breaking Changes
+
+- `UITree` type renamed to `Spec`
+- Schema is now imported from renderer packages (`@json-render/react`) not core
+- `defineCatalog` now requires a schema as first argument
+
+---
+
+## v0.3.0
+
+January 2026
+
+Internal release with codegen foundations.
+
+- Added `@json-render/codegen` package (spec traversal and JSX serialization)
+- Configurable AI model via environment variables
+- Documentation improvements and bug fixes
+
+*Note: Only @json-render/core was published to npm for this release.*
+
+---
+
+## v0.2.0
+
+January 2026
+
+Initial public release.
+
+- Core catalog and spec types
+- React renderer with contexts for data, actions, visibility
+- AI prompt generation from catalogs
+- Basic streaming support
+- Dashboard example application

apps/web/app/(main)/docs/code-export/page.mdx

@@ -0,0 +1,139 @@
+export const metadata = { title: "Code Export" }
+
+# Code Export
+
+Export generated UI as standalone code for your framework.
+
+## Overview
+
+While json-render is designed for dynamic rendering, you can export generated UI as static code. The code generation is intentionally project-specific so you have full control over:
+
+- Component templates (standalone, no json-render dependencies)
+- Package.json and project structure
+- Framework-specific patterns (Next.js, Remix, etc.)
+- How data is passed to components
+
+## Architecture
+
+Code export is split into two parts:
+
+### 1. @json-render/codegen (utilities)
+
+Framework-agnostic utilities for building code generators:
+
+```typescript
+import {
+  traverseSpec,          // Walk the UI spec
+  collectUsedComponents, // Get all component types used
+  collectStatePaths,      // Get all data binding paths
+  collectActions,        // Get all action names
+  serializeProps,        // Convert props to JSX string
+} from '@json-render/codegen';
+```
+
+### 2. Your Project (generator)
+
+Custom code generator specific to your project and framework:
+
+```typescript
+// lib/codegen/generator.ts
+import { collectUsedComponents, serializeProps } from '@json-render/codegen';
+
+export function generateNextJSProject(spec: Spec): GeneratedFile[] {
+  const components = collectUsedComponents(spec);
+  
+  return [
+    { path: 'package.json', content: '...' },
+    { path: 'app/page.tsx', content: '...' },
+    // ... component files
+  ];
+}
+```
+
+## Example: Next.js Export
+
+See the dashboard example for a complete implementation that exports:
+
+- `package.json` - Dependencies and scripts
+- `tsconfig.json` - TypeScript config
+- `next.config.js` - Next.js config
+- `app/layout.tsx` - Root layout
+- `app/globals.css` - Global styles
+- `app/page.tsx` - Generated page with data
+- `components/ui/*.tsx` - Standalone components
+
+## Standalone Components
+
+The exported components are standalone with no json-render dependencies. They receive data as props instead of using hooks:
+
+```tsx
+// Generated component (standalone)
+interface MetricProps {
+  label: string;
+  statePath: string;
+  data?: Record<string, unknown>;
+}
+
+export function Metric({ label, statePath, data }: MetricProps) {
+  const value = data ? getByPath(data, statePath) : undefined;
+  return (
+    <div>
+      <span>{label}</span>
+      <span>{formatValue(value)}</span>
+    </div>
+  );
+}
+```
+
+## Using the Utilities
+
+### traverseSpec
+
+```typescript
+import { traverseSpec } from '@json-render/codegen';
+
+traverseSpec(spec, (element, key, depth, parent) => {
+  console.log(' '.repeat(depth * 2) + `${key}: ${element.type}`);
+});
+```
+
+### collectUsedComponents
+
+```typescript
+import { collectUsedComponents } from '@json-render/codegen';
+
+const components = collectUsedComponents(spec);
+// Set { 'Card', 'Metric', 'Chart', 'Table' }
+
+// Generate only the needed component files
+for (const component of components) {
+  files.push({
+    path: `components/ui/${component.toLowerCase()}.tsx`,
+    content: componentTemplates[component],
+  });
+}
+```
+
+### serializeProps
+
+```typescript
+import { serializeProps } from '@json-render/codegen';
+
+const propsStr = serializeProps({
+  title: 'Dashboard',
+  columns: 3,
+  disabled: true,
+});
+// 'title="Dashboard" columns={3} disabled'
+```
+
+## Try It
+
+Run the dashboard example and click "Export Project" to see code generation in action:
+
+```bash
+cd examples/dashboard
+pnpm dev
+# Open http://localhost:3001
+# Generate a widget, then click "Export Project"
+```

apps/web/app/(main)/docs/code-export/page.tsx

@@ -1,170 +0,0 @@
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Code Export | json-render",
-};
-
-export default function CodeExportPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Code Export</h1>
-      <p className="text-muted-foreground mb-8">
-        Export generated UI as standalone code for your framework.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Overview</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        While json-render is designed for dynamic rendering, you can export
-        generated UI as static code. The code generation is intentionally
-        project-specific so you have full control over:
-      </p>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-2 mb-8">
-        <li>Component templates (standalone, no json-render dependencies)</li>
-        <li>Package.json and project structure</li>
-        <li>Framework-specific patterns (Next.js, Remix, etc.)</li>
-        <li>How data is passed to components</li>
-      </ul>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Architecture</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Code export is split into two parts:
-      </p>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">
-        1. @json-render/codegen (utilities)
-      </h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Framework-agnostic utilities for building code generators:
-      </p>
-      <Code lang="typescript">{`import {
-  traverseTree,          // Walk the UI tree
-  collectUsedComponents, // Get all component types used
-  collectDataPaths,      // Get all data binding paths
-  collectActions,        // Get all action names
-  serializeProps,        // Convert props to JSX string
-} from '@json-render/codegen';`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">
-        2. Your Project (generator)
-      </h3>
-      <p className="text-sm text-muted-foreground mb-4">
-        Custom code generator specific to your project and framework:
-      </p>
-      <Code lang="typescript">{`// lib/codegen/generator.ts
-import { collectUsedComponents, serializeProps } from '@json-render/codegen';
-
-export function generateNextJSProject(tree: UITree): GeneratedFile[] {
-  const components = collectUsedComponents(tree);
-  
-  return [
-    { path: 'package.json', content: '...' },
-    { path: 'app/page.tsx', content: '...' },
-    // ... component files
-  ];
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Example: Next.js Export
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        See the dashboard example for a complete implementation that exports:
-      </p>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-2 mb-4">
-        <li>
-          <code className="text-foreground">package.json</code> - Dependencies
-          and scripts
-        </li>
-        <li>
-          <code className="text-foreground">tsconfig.json</code> - TypeScript
-          config
-        </li>
-        <li>
-          <code className="text-foreground">next.config.js</code> - Next.js
-          config
-        </li>
-        <li>
-          <code className="text-foreground">app/layout.tsx</code> - Root layout
-        </li>
-        <li>
-          <code className="text-foreground">app/globals.css</code> - Global
-          styles
-        </li>
-        <li>
-          <code className="text-foreground">app/page.tsx</code> - Generated page
-          with data
-        </li>
-        <li>
-          <code className="text-foreground">components/ui/*.tsx</code> -
-          Standalone components
-        </li>
-      </ul>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Standalone Components
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        The exported components are standalone with no json-render dependencies.
-        They receive data as props instead of using hooks:
-      </p>
-      <Code lang="tsx">{`// Generated component (standalone)
-interface MetricProps {
-  label: string;
-  valuePath: string;
-  data?: Record<string, unknown>;
-}
-
-export function Metric({ label, valuePath, data }: MetricProps) {
-  const value = data ? getByPath(data, valuePath) : undefined;
-  return (
-    <div>
-      <span>{label}</span>
-      <span>{formatValue(value)}</span>
-    </div>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Using the Utilities</h2>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">traverseTree</h3>
-      <Code lang="typescript">{`import { traverseTree } from '@json-render/codegen';
-
-traverseTree(tree, (element, depth, parent) => {
-  console.log(' '.repeat(depth * 2) + element.type);
-});`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">collectUsedComponents</h3>
-      <Code lang="typescript">{`import { collectUsedComponents } from '@json-render/codegen';
-
-const components = collectUsedComponents(tree);
-// Set { 'Card', 'Metric', 'Chart', 'Table' }
-
-// Generate only the needed component files
-for (const component of components) {
-  files.push({
-    path: \`components/ui/\${component.toLowerCase()}.tsx\`,
-    content: componentTemplates[component],
-  });
-}`}</Code>
-
-      <h3 className="text-lg font-semibold mt-8 mb-4">serializeProps</h3>
-      <Code lang="typescript">{`import { serializeProps } from '@json-render/codegen';
-
-const propsStr = serializeProps({
-  title: 'Dashboard',
-  columns: 3,
-  disabled: true,
-});
-// 'title="Dashboard" columns={3} disabled'`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Try It</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Run the dashboard example and click &quot;Export Project&quot; to see
-        code generation in action:
-      </p>
-      <Code lang="bash">{`cd examples/dashboard
-pnpm dev
-# Open http://localhost:3001
-# Generate a widget, then click "Export Project"`}</Code>
-    </article>
-  );
-}

apps/web/app/(main)/docs/components/page.tsx

@@ -1,111 +0,0 @@
-import Link from "next/link";
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Components | json-render",
-};
-
-export default function ComponentsPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Components</h1>
-      <p className="text-muted-foreground mb-8">
-        Register React components to render your catalog types.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Component Registry</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Create a registry that maps catalog component types to React components:
-      </p>
-      <Code lang="tsx">{`const registry = {
-  Card: ({ element, children }) => (
-    <div className="card">
-      <h2>{element.props.title}</h2>
-      {element.props.description && (
-        <p>{element.props.description}</p>
-      )}
-      {children}
-    </div>
-  ),
-  
-  Button: ({ element, onAction }) => (
-    <button onClick={() => onAction(element.props.action, {})}>
-      {element.props.label}
-    </button>
-  ),
-};`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Component Props</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Each component receives these props:
-      </p>
-      <Code lang="typescript">{`interface ComponentProps {
-  element: {
-    key: string;
-    type: string;
-    props: Record<string, unknown>;
-    children?: UIElement[];
-    visible?: VisibilityCondition;
-    validation?: ValidationSchema;
-  };
-  children?: React.ReactNode;  // Rendered children
-  onAction: (name: string, params: object) => void;
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Using Data Binding</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Use hooks to read and write data:
-      </p>
-      <Code lang="tsx">{`import { useDataValue, useDataBinding } from '@json-render/react';
-
-const Metric = ({ element }) => {
-  // Read-only value
-  const value = useDataValue(element.props.valuePath);
-  
-  return (
-    <div className="metric">
-      <span className="label">{element.props.label}</span>
-      <span className="value">{formatValue(value)}</span>
-    </div>
-  );
-};
-
-const TextField = ({ element }) => {
-  // Two-way binding
-  const [value, setValue] = useDataBinding(element.props.valuePath);
-  
-  return (
-    <input
-      value={value || ''}
-      onChange={(e) => setValue(e.target.value)}
-      placeholder={element.props.placeholder}
-    />
-  );
-};`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Using the Renderer</h2>
-      <Code lang="tsx">{`import { Renderer } from '@json-render/react';
-
-function App() {
-  return (
-    <Renderer
-      tree={uiTree}
-      registry={registry}
-    />
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Next</h2>
-      <p className="text-sm text-muted-foreground">
-        Learn about{" "}
-        <Link
-          href="/docs/data-binding"
-          className="text-foreground hover:underline"
-        >
-          data binding
-        </Link>{" "}
-        for dynamic values.
-      </p>
-    </article>
-  );
-}

apps/web/app/(main)/docs/custom-schema/page.mdx

@@ -0,0 +1,300 @@
+export const metadata = { title: "Custom Schema & Renderer" }
+
+# Custom Schema & Renderer
+
+Build your own schema and renderer with `@json-render/core`.
+
+## Overview
+
+`@json-render/core` is schema-agnostic. While `@json-render/react` provides a ready-to-use schema and renderer, you can create your own to match any JSON structure - whether it's a domain-specific format, an existing protocol, or something entirely custom.
+
+## 1. Define Your Schema
+
+Start by defining the JSON structure your system will use. Here's an example of a simple dashboard schema:
+
+```json
+{
+  "layout": "grid",
+  "columns": 2,
+  "widgets": [
+    {
+      "type": "metric",
+      "title": "Revenue",
+      "value": "$12,345",
+      "trend": "up"
+    },
+    {
+      "type": "chart",
+      "title": "Sales",
+      "chartType": "line",
+      "dataKey": "salesData"
+    },
+    {
+      "type": "table",
+      "title": "Recent Orders",
+      "columns": ["id", "customer", "amount"],
+      "dataKey": "orders"
+    }
+  ]
+}
+```
+
+## 2. Create the Catalog
+
+Define a catalog that describes your components and validates props using `defineCatalog` — see [Catalog](/docs/catalog).
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { z } from 'zod';
+
+export const dashboardCatalog = defineCatalog(mySchema, {
+  components: {
+    metric: {
+      description: 'Displays a single metric value',
+      props: z.object({
+        title: z.string(),
+        value: z.string(),
+        trend: z.enum(['up', 'down', 'flat']).optional(),
+        change: z.string().optional(),
+      }),
+    },
+    chart: {
+      description: 'Renders a chart visualization',
+      props: z.object({
+        title: z.string(),
+        chartType: z.enum(['line', 'bar', 'pie', 'area']),
+        dataKey: z.string(),
+        height: z.number().optional(),
+      }),
+    },
+    table: {
+      description: 'Displays tabular data',
+      props: z.object({
+        title: z.string(),
+        columns: z.array(z.string()),
+        dataKey: z.string(),
+        pageSize: z.number().optional(),
+      }),
+    },
+    text: {
+      description: 'Displays text content',
+      props: z.object({
+        content: z.string(),
+        variant: z.enum(['heading', 'body', 'caption']).optional(),
+      }),
+    },
+  },
+});
+```
+
+## 3. Define the Root Schema
+
+Create a schema for the overall document structure:
+
+```typescript
+import { z } from 'zod';
+
+const WidgetSchema = z.object({
+  type: z.string(),
+  title: z.string().optional(),
+  // Additional props validated by catalog
+}).passthrough();
+
+export const DashboardSchema = z.object({
+  layout: z.enum(['grid', 'stack', 'tabs']),
+  columns: z.number().optional(),
+  widgets: z.array(WidgetSchema),
+});
+
+export type Dashboard = z.infer<typeof DashboardSchema>;
+export type Widget = z.infer<typeof WidgetSchema>;
+```
+
+## 4. Build the Renderer
+
+Create a renderer that maps your schema to React components:
+
+```tsx
+import React from 'react';
+import { dashboardCatalog } from './catalog';
+import type { Dashboard, Widget } from './schema';
+
+// Widget component registry
+const widgetComponents: Record<string, React.FC<any>> = {
+  metric: ({ title, value, trend, change }) => (
+    <div className="p-4 rounded-lg border">
+      <p className="text-sm text-muted-foreground">{title}</p>
+      <p className="text-2xl font-bold">{value}</p>
+      {trend && (
+        <p className={`text-sm ${trend === 'up' ? 'text-green-500' : 'text-red-500'}`}>
+          {trend === 'up' ? '+' : '-'}{change}
+        </p>
+      )}
+    </div>
+  ),
+
+  chart: ({ title, chartType, data }) => (
+    <div className="p-4 rounded-lg border">
+      <p className="font-medium mb-2">{title}</p>
+      <div className="h-48 bg-muted rounded flex items-center justify-center">
+        {/* Your chart library here */}
+        <span className="text-muted-foreground">{chartType} chart</span>
+      </div>
+    </div>
+  ),
+
+  table: ({ title, columns, data }) => (
+    <div className="p-4 rounded-lg border">
+      <p className="font-medium mb-2">{title}</p>
+      <table className="w-full text-sm">
+        <thead>
+          <tr>
+            {columns.map((col: string) => (
+              <th key={col} className="text-left p-2 border-b">{col}</th>
+            ))}
+          </tr>
+        </thead>
+        <tbody>
+          {data?.map((row: any, i: number) => (
+            <tr key={i}>
+              {columns.map((col: string) => (
+                <td key={col} className="p-2 border-b">{row[col]}</td>
+              ))}
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  ),
+
+  text: ({ content, variant = 'body' }) => {
+    const className = {
+      heading: 'text-xl font-bold',
+      body: 'text-base',
+      caption: 'text-sm text-muted-foreground',
+    }[variant];
+    return <p className={className}>{content}</p>;
+  },
+};
+
+// Main renderer
+export function DashboardRenderer({
+  spec,
+  data = {},
+}: {
+  spec: Dashboard;
+  data?: Record<string, any>;
+}) {
+  const layoutClass = {
+    grid: `grid gap-4 ${spec.columns ? `grid-cols-${spec.columns}` : 'grid-cols-2'}`,
+    stack: 'flex flex-col gap-4',
+    tabs: 'space-y-4',
+  }[spec.layout];
+
+  return (
+    <div className={layoutClass}>
+      {spec.widgets.map((widget, index) => {
+        const Component = widgetComponents[widget.type];
+        if (!Component) {
+          console.warn(`Unknown widget type: ${widget.type}`);
+          return null;
+        }
+
+        // Resolve data references
+        const widgetData = widget.dataKey ? data[widget.dataKey] : undefined;
+
+        return (
+          <Component
+            key={index}
+            {...widget}
+            data={widgetData}
+          />
+        );
+      })}
+    </div>
+  );
+}
+```
+
+## 5. Generate LLM Prompts
+
+Use the catalog to generate system prompts for AI:
+
+```typescript
+const systemPrompt = dashboardCatalog.prompt({
+  customRules: [
+    'Use metric widgets for single KPI values',
+    'Use chart widgets for time-series data',
+    'Use table widgets for lists of records',
+    'Limit dashboards to 6 widgets maximum',
+  ],
+});
+
+// Use with any LLM
+const response = await generateText({
+  model: 'gpt-4',
+  system: systemPrompt,
+  prompt: 'Create a sales dashboard with revenue, orders, and a chart',
+});
+```
+
+## 6. Validate Specs
+
+Validate incoming specs against your schema. Use `catalog.validate()` to check AI output against the catalog's Zod schema:
+
+```typescript
+function validateDashboard(spec: unknown) {
+  // Validate root structure
+  const rootResult = DashboardSchema.safeParse(spec);
+  if (!rootResult.success) {
+    return { valid: false, errors: rootResult.error.errors };
+  }
+
+  // Validate each widget's props against the catalog
+  const result = dashboardCatalog.validate(spec);
+  if (!result.success) {
+    return { valid: false, errors: result.error.errors };
+  }
+
+  return { valid: true, errors: [] };
+}
+```
+
+## Usage Example
+
+```tsx
+'use client';
+
+import { useState } from 'react';
+import { DashboardRenderer } from './renderer';
+import type { Dashboard } from './schema';
+
+const initialSpec: Dashboard = {
+  layout: 'grid',
+  columns: 2,
+  widgets: [
+    { type: 'metric', title: 'Revenue', value: '$12,345', trend: 'up' },
+    { type: 'metric', title: 'Orders', value: '156', trend: 'up' },
+    { type: 'chart', title: 'Sales Trend', chartType: 'line', dataKey: 'sales' },
+    { type: 'table', title: 'Recent Orders', columns: ['id', 'customer', 'amount'], dataKey: 'orders' },
+  ],
+};
+
+const data = {
+  sales: [/* chart data */],
+  orders: [
+    { id: '001', customer: 'Acme Inc', amount: '$500' },
+    { id: '002', customer: 'Globex', amount: '$750' },
+  ],
+};
+
+export function MyDashboard() {
+  const [spec, setSpec] = useState(initialSpec);
+
+  return <DashboardRenderer spec={spec} data={data} />;
+}
+```
+
+## Next
+
+See how to integrate with [A2UI](/docs/a2ui) or [Adaptive Cards](/docs/adaptive-cards) protocols.

apps/web/app/(main)/docs/data-binding/page.mdx

@@ -0,0 +1,265 @@
+export const metadata = { title: "Data Binding" }
+
+# Data Binding
+
+Connect UI elements to dynamic data using expressions in your JSON specs.
+
+## State Model
+
+Every spec can include a `state` object that holds the data your UI reads from:
+
+```json
+{
+  "root": "greeting",
+  "elements": {
+    "greeting": {
+      "type": "Text",
+      "props": { "content": { "$state": "/user/name" } },
+      "children": []
+    }
+  },
+  "state": {
+    "user": { "name": "Alice" }
+  }
+}
+```
+
+State can also be provided programmatically at runtime. In `@json-render/react`, this is done via `StateProvider` and hooks like `useStateStore`. See the [React API reference](/docs/api/react) for details.
+
+## JSON Pointer Paths
+
+All paths in json-render follow JSON Pointer (RFC 6901). A path is a string of `/`-separated tokens starting from the root:
+
+```
+Given this state:
+{
+  "user": { "name": "Alice", "email": "alice@example.com" },
+  "todos": [
+    { "title": "Buy milk", "done": false },
+    { "title": "Walk dog", "done": true }
+  ]
+}
+
+"/user/name"      -> "Alice"
+"/user/email"     -> "alice@example.com"
+"/todos/0/title"  -> "Buy milk"
+"/todos/1/done"   -> true
+```
+
+## Expressions
+
+Expressions are special objects you place in props to read dynamic values instead of hardcoding them. There are six expression types.
+
+### `$state` — Read from state
+
+Use `{ "$state": "/path" }` in any prop to read a value from the state model:
+
+```json
+{
+  "type": "Card",
+  "props": {
+    "title": { "$state": "/user/name" },
+    "subtitle": { "$state": "/user/email" }
+  },
+  "children": []
+}
+```
+
+If state contains `{ "user": { "name": "Alice", "email": "alice@example.com" } }`, the Card renders with title "Alice" and subtitle "alice@example.com".
+
+### `$item` — Read from the current repeat item
+
+Use `{ "$item": "field" }` inside a [repeat](#repeat) to read a field from the current array item:
+
+```json
+{
+  "type": "Text",
+  "props": { "content": { "$item": "title" } },
+  "children": []
+}
+```
+
+Use `{ "$item": "" }` to get the entire item object.
+
+### `$index` — Current repeat index
+
+Use `{ "$index": true }` inside a [repeat](#repeat) to get the current array index (zero-based number):
+
+```json
+{
+  "type": "Text",
+  "props": { "content": { "$index": true } },
+  "children": []
+}
+```
+
+## Repeat
+
+The `repeat` field on an element renders its children once per item in a state array. It is a top-level field on the element, sibling of `type`, `props`, and `children` — not inside `props`.
+
+```json
+{
+  "root": "todo-list",
+  "elements": {
+    "todo-list": {
+      "type": "Column",
+      "props": { "gap": 8 },
+      "repeat": { "statePath": "/todos", "key": "id" },
+      "children": ["todo-item"]
+    },
+    "todo-item": {
+      "type": "Card",
+      "props": {
+        "title": { "$item": "title" },
+        "subtitle": { "$item": "description" }
+      },
+      "children": []
+    }
+  },
+  "state": {
+    "todos": [
+      { "id": "1", "title": "Buy milk", "description": "2% or whole" },
+      { "id": "2", "title": "Walk dog", "description": "Around the park" }
+    ]
+  }
+}
+```
+
+- `repeat.statePath` — JSON Pointer to the state array
+- `repeat.key` — field name on each item to use as a stable key for rendering
+
+Inside `todo-item`, `{ "$item": "title" }` reads the `title` field from whichever array item is currently being rendered. `{ "$index": true }` would return `0` for the first item, `1` for the second, and so on.
+
+## Two-Way Binding with `$bindState`
+
+Form components use `{ "$bindState": "/path" }` on their natural value prop for two-way binding. The component reads from and writes to the state path.
+
+### Value prop (text inputs)
+
+```json
+{
+  "type": "TextInput",
+  "props": {
+    "value": { "$bindState": "/form/email" },
+    "placeholder": "Enter your email"
+  },
+  "children": []
+}
+```
+
+### Checked prop (switches, checkboxes)
+
+```json
+{
+  "type": "Switch",
+  "props": {
+    "label": "Enable notifications",
+    "checked": { "$bindState": "/settings/notifications" }
+  },
+  "children": []
+}
+```
+
+### Pressed prop (toggle buttons)
+
+```json
+{
+  "type": "ToggleButton",
+  "props": {
+    "label": "Bold",
+    "pressed": { "$bindState": "/editor/bold" }
+  },
+  "children": []
+}
+```
+
+## Two-Way Binding with `$bindItem`
+
+Inside a repeat scope, use `{ "$bindItem": "field" }` to bind to a field on the current item:
+
+```json
+{
+  "type": "Switch",
+  "props": {
+    "label": "Done",
+    "checked": { "$bindItem": "completed" }
+  },
+  "children": []
+}
+```
+
+Use `{ "$bindItem": "" }` to bind to the entire item.
+
+`statePath` is not used for component binding. It remains for `repeat.statePath` (array iteration path) and action params like `setState.statePath` (target path for mutations).
+
+## Conditional Props
+
+Use `$cond` / `$then` / `$else` to pick a prop value based on a condition:
+
+```json
+{
+  "type": "Badge",
+  "props": {
+    "label": {
+      "$cond": { "$state": "/user/isAdmin" },
+      "$then": "Admin",
+      "$else": "Member"
+    }
+  },
+  "children": []
+}
+```
+
+The condition uses the same [visibility](/docs/visibility) expression format.
+
+## Quick Reference
+
+<div className="my-6 overflow-x-auto">
+  <table className="mdx-table w-full text-sm border-collapse">
+    <thead>
+      <tr>
+        <th>Expression</th>
+        <th>Syntax</th>
+        <th>Context</th>
+      </tr>
+    </thead>
+    <tbody>
+      <tr>
+        <td><code>{"$state"}</code></td>
+        <td><code>{'{ "$state": "/path" }'}</code></td>
+        <td>Anywhere</td>
+      </tr>
+      <tr>
+        <td><code>{"$item"}</code></td>
+        <td><code>{'{ "$item": "field" }'}</code></td>
+        <td>Inside repeat only</td>
+      </tr>
+      <tr>
+        <td><code>{"$index"}</code></td>
+        <td><code>{'{ "$index": true }'}</code></td>
+        <td>Inside repeat only</td>
+      </tr>
+      <tr>
+        <td><code>{"$cond"}</code></td>
+        <td><code>{'{ "$cond": ..., "$then": ..., "$else": ... }'}</code></td>
+        <td>Anywhere</td>
+      </tr>
+      <tr>
+        <td><code>{"$bindState"}</code></td>
+        <td><code>{'{ "$bindState": "/path" }'}</code></td>
+        <td>Form components (value, checked, pressed)</td>
+      </tr>
+      <tr>
+        <td><code>{"$bindItem"}</code></td>
+        <td><code>{'{ "$bindItem": "field" }'}</code></td>
+        <td>Form components inside repeat</td>
+      </tr>
+    </tbody>
+  </table>
+</div>
+
+## Next
+
+- [Visibility](/docs/visibility) — conditionally show or hide elements
+- [Action handlers](/docs/registry#action-handlers) — respond to user interactions
+- [React API reference](/docs/api/react) — React-specific hooks for programmatic state access

apps/web/app/(main)/docs/data-binding/page.tsx

@@ -1,133 +0,0 @@
-import Link from "next/link";
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Data Binding | json-render",
-};
-
-export default function DataBindingPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Data Binding</h1>
-      <p className="text-muted-foreground mb-8">
-        Connect UI components to your application data using JSON Pointer paths.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">JSON Pointer Paths</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        json-render uses JSON Pointer (RFC 6901) for data paths:
-      </p>
-      <Code lang="json">{`// Given this data:
-{
-  "user": {
-    "name": "Alice",
-    "email": "alice@example.com"
-  },
-  "metrics": {
-    "revenue": 125000,
-    "growth": 0.15
-  }
-}
-
-// These paths access:
-"/user/name"        -> "Alice"
-"/metrics/revenue"  -> 125000
-"/metrics/growth"   -> 0.15`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">DataProvider</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Wrap your app with DataProvider to enable data binding:
-      </p>
-      <Code lang="tsx">{`import { DataProvider } from '@json-render/react';
-
-function App() {
-  const initialData = {
-    user: { name: 'Alice' },
-    form: { email: '', message: '' },
-  };
-
-  return (
-    <DataProvider initialData={initialData}>
-      {/* Your UI */}
-    </DataProvider>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Reading Data</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Use <code className="text-foreground">useDataValue</code> for read-only
-        access:
-      </p>
-      <Code lang="tsx">{`import { useDataValue } from '@json-render/react';
-
-function UserGreeting() {
-  const name = useDataValue('/user/name');
-  return <h1>Hello, {name}!</h1>;
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Two-Way Binding</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Use <code className="text-foreground">useDataBinding</code> for
-        read-write access:
-      </p>
-      <Code lang="tsx">{`import { useDataBinding } from '@json-render/react';
-
-function EmailInput() {
-  const [email, setEmail] = useDataBinding('/form/email');
-  
-  return (
-    <input
-      type="email"
-      value={email || ''}
-      onChange={(e) => setEmail(e.target.value)}
-    />
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Using the Data Context
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Access the full data context for advanced use cases:
-      </p>
-      <Code lang="tsx">{`import { useData } from '@json-render/react';
-
-function DataDebugger() {
-  const { data, setData, getValue, setValue } = useData();
-  
-  // Read any path
-  const revenue = getValue('/metrics/revenue');
-  
-  // Write any path
-  const updateRevenue = () => setValue('/metrics/revenue', 150000);
-  
-  // Replace all data
-  const resetData = () => setData({ user: {}, form: {} });
-  
-  return <pre>{JSON.stringify(data, null, 2)}</pre>;
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">In JSON UI Trees</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        AI can reference data paths in component props:
-      </p>
-      <Code lang="json">{`{
-  "type": "Metric",
-  "props": {
-    "label": "Total Revenue",
-    "valuePath": "/metrics/revenue",
-    "format": "currency"
-  }
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Next</h2>
-      <p className="text-sm text-muted-foreground">
-        Learn about{" "}
-        <Link href="/docs/actions" className="text-foreground hover:underline">
-          actions
-        </Link>{" "}
-        for user interactions.
-      </p>
-    </article>
-  );
-}

apps/web/app/(main)/docs/generation-modes/page.mdx

@@ -0,0 +1,221 @@
+export const metadata = { title: "Generation Modes" }
+
+# Generation Modes
+
+json-render supports two modes for AI-generated UI: **Generate mode** for standalone UI and **Chat mode** for inline UI within a conversation.
+
+The mode controls how the AI formats its output and how your app processes the stream. The underlying JSONL patch format is the same in both modes.
+
+<GenerationModesDiagram />
+
+## Generate Mode (Standalone)
+
+In generate mode, the AI outputs **only JSONL patches** — no prose, no markdown. The entire response is a UI spec.
+
+This is the default mode and is ideal for:
+
+- Playground and builder tools
+- Form generators
+- Dashboard builders
+- Any UI where the generated interface is the whole response
+
+### Setup
+
+```typescript
+import { streamText } from "ai";
+
+// Generate mode is the default (no mode option needed)
+const systemPrompt = catalog.prompt({
+  customRules: [
+    "Use Card as root for forms and small UIs.",
+    "Use Grid for multi-column layouts.",
+  ],
+});
+
+const result = streamText({
+  model: "anthropic/claude-haiku-4.5",
+  system: systemPrompt,
+  prompt: userPrompt,
+});
+```
+
+### Client
+
+On the client, use `useUIStream` from `@json-render/react` or the lower-level `createSpecStreamCompiler` from `@json-render/core` to compile the JSONL stream into a spec:
+
+```tsx
+import { useUIStream } from "@json-render/react";
+
+function Playground() {
+  const { spec, isStreaming, send } = useUIStream({
+    api: "/api/generate",
+  });
+
+  return (
+    <Renderer
+      spec={spec}
+      registry={registry}
+      loading={isStreaming}
+    />
+  );
+}
+```
+
+### Example output
+
+The AI outputs only JSONL — one patch per line, no surrounding text:
+
+```
+{"op":"add","path":"/root","value":"card-1"}
+{"op":"add","path":"/elements/card-1","value":{"type":"Card","props":{"title":"Sign In"},"children":["email","password","submit"]}}
+{"op":"add","path":"/elements/email","value":{"type":"Input","props":{"label":"Email","name":"email","type":"email"}}}
+{"op":"add","path":"/elements/password","value":{"type":"Input","props":{"label":"Password","name":"password","type":"password"}}}
+{"op":"add","path":"/elements/submit","value":{"type":"Button","props":{"label":"Sign In"}}}
+```
+
+## Chat Mode (Inline)
+
+In chat mode, the AI responds **conversationally first**, then outputs JSONL patches on their own lines. Text-only replies are allowed when no UI is needed (e.g. greetings, clarifying questions).
+
+This is ideal for:
+
+- AI chatbots with rich UI responses
+- Copilot experiences
+- Educational assistants
+- Any conversational interface where generated UI is embedded in chat messages
+
+### Setup
+
+```typescript
+import { streamText } from "ai";
+import { pipeJsonRender } from "@json-render/core";
+import { createUIMessageStream, createUIMessageStreamResponse } from "ai";
+
+// Enable chat mode
+const systemPrompt = catalog.prompt({ mode: "chat" });
+
+const result = streamText({
+  model: yourModel,
+  system: systemPrompt,
+  messages,
+});
+
+// In your API route, pipe the stream through pipeJsonRender
+// to separate text from JSONL patches
+const stream = createUIMessageStream({
+  execute: async ({ writer }) => {
+    writer.merge(pipeJsonRender(result.toUIMessageStream()));
+  },
+});
+
+return createUIMessageStreamResponse({ stream });
+```
+
+`pipeJsonRender` inspects each line of the AI's response. Lines that parse as JSONL patches are emitted as `data-spec` parts (which the renderer picks up). Everything else is passed through as text.
+
+### Client
+
+On the client, use `useJsonRenderMessage` from `@json-render/react` to extract the spec from a chat message's parts:
+
+```tsx
+import { useChat } from "@ai-sdk/react";
+import { useJsonRenderMessage } from "@json-render/react";
+
+function Chat() {
+  const { messages, input, handleInputChange, handleSubmit } = useChat();
+
+  return (
+    <div>
+      {messages.map((msg) => (
+        <ChatMessage key={msg.id} message={msg} />
+      ))}
+      {/* input form */}
+    </div>
+  );
+}
+
+function ChatMessage({ message }) {
+  const { spec } = useJsonRenderMessage(message.parts);
+
+  return (
+    <div>
+      {/* Render text parts */}
+      {message.parts
+        .filter((p) => p.type === "text")
+        .map((p, i) => <p key={i}>{p.text}</p>)}
+
+      {/* Render the generated UI inline */}
+      {spec && (
+        <Renderer
+          spec={spec}
+          registry={registry}
+        />
+      )}
+    </div>
+  );
+}
+```
+
+### Example output
+
+The AI writes a brief explanation, then JSONL patches on their own lines:
+
+```
+Here's a dashboard showing the latest crypto prices:
+
+{"op":"add","path":"/root","value":"dashboard"}
+{"op":"add","path":"/state/prices","value":[{"name":"Bitcoin","price":98450},{"name":"Ethereum","price":3120}]}
+{"op":"add","path":"/elements/dashboard","value":{"type":"Grid","props":{"columns":"2"},"children":["btc","eth"]}}
+{"op":"add","path":"/elements/btc","value":{"type":"Metric","props":{"label":"Bitcoin","value":{"$state":"/prices/0/price"}}}}
+{"op":"add","path":"/elements/eth","value":{"type":"Metric","props":{"label":"Ethereum","value":{"$state":"/prices/1/price"}}}}
+```
+
+If the user asks a simple question ("what does BTC stand for?"), the AI replies with text only — no JSONL.
+
+## Quick Comparison
+
+<div className="my-6 overflow-x-auto">
+  <table className="mdx-table w-full text-sm border-collapse">
+    <thead>
+      <tr>
+        <th />
+        <th>Generate</th>
+        <th>Chat</th>
+      </tr>
+    </thead>
+    <tbody>
+      <tr>
+        <td>Output format</td>
+        <td>JSONL only</td>
+        <td>Text + JSONL</td>
+      </tr>
+      <tr>
+        <td>Text-only replies</td>
+        <td>No</td>
+        <td>Yes</td>
+      </tr>
+      <tr>
+        <td>System prompt</td>
+        <td><code>{"catalog.prompt()"}</code></td>
+        <td><code>{'catalog.prompt({ mode: "chat" })'}</code></td>
+      </tr>
+      <tr>
+        <td>Stream utility</td>
+        <td><code>{"useUIStream"}</code></td>
+        <td><code>{"pipeJsonRender"}</code>{" + "}<code>{"useJsonRenderMessage"}</code></td>
+      </tr>
+      <tr>
+        <td>Typical use case</td>
+        <td>Playground, builders</td>
+        <td>Chatbots, copilots</td>
+      </tr>
+    </tbody>
+  </table>
+</div>
+
+Both modes use the same JSONL patch format (RFC 6902) and the same catalog/registry system. The only difference is whether the AI is allowed to include prose alongside the patches.
+
+## Next
+
+- Learn about the [JSONL streaming format](/docs/streaming)
+- See the [AI SDK integration](/docs/ai-sdk) for setup with the Vercel AI SDK

apps/web/app/(main)/docs/installation/page.mdx

@@ -0,0 +1,32 @@
+export const metadata = { title: "Installation" }
+
+# Installation
+
+Install the core package plus your renderer of choice.
+
+## For React UI
+
+<PackageInstall packages="@json-render/core @json-render/react" />
+
+## For React Native
+
+<PackageInstall packages="@json-render/core @json-render/react-native" />
+
+## For Remotion Video
+
+<PackageInstall packages="@json-render/core @json-render/remotion remotion @remotion/player" />
+
+## Peer Dependencies
+
+json-render requires the following peer dependencies:
+
+- `react` ^19.0.0
+- `zod` ^4.0.0
+
+<PackageInstall packages="react zod" />
+
+## For AI Integration
+
+To use json-render with AI models, you'll also need the Vercel AI SDK:
+
+<PackageInstall packages="ai" />

apps/web/app/(main)/docs/installation/page.tsx

@@ -1,40 +0,0 @@
-import { PackageInstall } from "@/components/package-install";
-
-export const metadata = {
-  title: "Installation | json-render",
-};
-
-export default function InstallationPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Installation</h1>
-      <p className="text-muted-foreground mb-8">
-        Install the core and React packages to get started.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Install packages</h2>
-      <PackageInstall packages="@json-render/core @json-render/react" />
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Peer Dependencies</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        json-render requires the following peer dependencies:
-      </p>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-1 mb-4">
-        <li>
-          <code className="text-foreground">react</code> ^19.0.0
-        </li>
-        <li>
-          <code className="text-foreground">zod</code> ^4.0.0
-        </li>
-      </ul>
-      <PackageInstall packages="react zod" />
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">For AI Integration</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        To use json-render with AI models, you&apos;ll also need the Vercel AI
-        SDK:
-      </p>
-      <PackageInstall packages="ai" />
-    </article>
-  );
-}

apps/web/app/(main)/docs/layout.tsx

@@ -1,43 +1,6 @@
-import Link from "next/link";
 import { DocsMobileNav } from "@/components/docs-mobile-nav";
-
-const navigation = [
-  {
-    title: "Getting Started",
-    items: [
-      { title: "Introduction", href: "/docs" },
-      { title: "Installation", href: "/docs/installation" },
-      { title: "Quick Start", href: "/docs/quick-start" },
-    ],
-  },
-  {
-    title: "Core Concepts",
-    items: [
-      { title: "Catalog", href: "/docs/catalog" },
-      { title: "Components", href: "/docs/components" },
-      { title: "Data Binding", href: "/docs/data-binding" },
-      { title: "Actions", href: "/docs/actions" },
-      { title: "Visibility", href: "/docs/visibility" },
-      { title: "Validation", href: "/docs/validation" },
-    ],
-  },
-  {
-    title: "Guides",
-    items: [
-      { title: "AI SDK Integration", href: "/docs/ai-sdk" },
-      { title: "Streaming", href: "/docs/streaming" },
-      { title: "Code Export", href: "/docs/code-export" },
-    ],
-  },
-  {
-    title: "API Reference",
-    items: [
-      { title: "@json-render/core", href: "/docs/api/core" },
-      { title: "@json-render/react", href: "/docs/api/react" },
-      { title: "@json-render/codegen", href: "/docs/api/codegen" },
-    ],
-  },
-];
+import { DocsSidebar } from "@/components/docs-sidebar";
+import { CopyPageButton } from "@/components/copy-page-button";
 
 export default function DocsLayout({
   children,
@@ -49,32 +12,17 @@ export default function DocsLayout({
       <DocsMobileNav />
       <div className="max-w-5xl mx-auto px-6 py-8 lg:py-12 flex gap-16">
         {/* Sidebar */}
-        <aside className="w-48 shrink-0 hidden lg:block">
-          <nav className="sticky top-20 space-y-6">
-            {navigation.map((section) => (
-              <div key={section.title}>
-                <h4 className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-2">
-                  {section.title}
-                </h4>
-                <ul className="space-y-1">
-                  {section.items.map((item) => (
-                    <li key={item.href}>
-                      <Link
-                        href={item.href}
-                        className="text-sm text-muted-foreground hover:text-foreground transition-colors block py-1"
-                      >
-                        {item.title}
-                      </Link>
-                    </li>
-                  ))}
-                </ul>
-              </div>
-            ))}
-          </nav>
+        <aside className="w-48 shrink-0 hidden lg:block sticky top-28 h-[calc(100vh-7rem)] overflow-y-auto">
+          <DocsSidebar />
         </aside>
 
         {/* Content */}
-        <div className="flex-1 min-w-0 max-w-2xl">{children}</div>
+        <div className="flex-1 min-w-0 max-w-2xl pb-20">
+          <div className="flex justify-end mb-4">
+            <CopyPageButton />
+          </div>
+          <article>{children}</article>
+        </div>
       </div>
     </>
   );

apps/web/app/(main)/docs/migration/page.mdx

@@ -0,0 +1,412 @@
+export const metadata = { title: "Migration Guide" }
+
+# Migration Guide
+
+This guide covers breaking changes introduced in v0.6.0 and how to update your code.
+
+## State Provider
+
+`DataProvider` has been renamed to `StateProvider`, and its props have changed.
+
+**Before:**
+
+```tsx
+import { DataProvider } from "@json-render/react";
+
+<DataProvider data={myData} getValue={getter} setValue={setter}>
+  {children}
+</DataProvider>
+```
+
+**After:**
+
+```tsx
+import { StateProvider } from "@json-render/react";
+
+<StateProvider initialState={myData} onStateChange={(path, value) => console.log(path, value)}>
+  {children}
+</StateProvider>
+```
+
+`StateProvider` now manages state internally. Use `useStateStore()` to access `get`, `set`, and `update`.
+
+| Before | After |
+|--------|-------|
+| `DataProvider` | `StateProvider` |
+| `data` prop | `initialState` prop |
+| `getValue` / `setValue` props | Removed (use `useStateStore()` hook for `get` / `set`) |
+| `useData` | `useStateStore` |
+| `useDataValue` | `useStateValue` |
+| `useDataBinding` | `useStateBinding` (deprecated, use `useBoundProp` instead) |
+| `DataModel` type | `StateModel` type |
+
+## Dynamic Expressions
+
+All dynamic value expressions have been renamed to use `$state`, `$item`, and `$index`.
+
+**Before:**
+
+```json
+{
+  "type": "Text",
+  "props": {
+    "label": { "$path": "/user/name" },
+    "count": { "$data": "/items/length" }
+  }
+}
+```
+
+**After:**
+
+```json
+{
+  "type": "Text",
+  "props": {
+    "label": { "$state": "/user/name" },
+    "count": { "$state": "/items/length" }
+  }
+}
+```
+
+Inside repeat scopes, use `$item` and `$index`:
+
+```json
+{
+  "type": "Card",
+  "props": {
+    "title": { "$item": "name" },
+    "subtitle": { "$index": true }
+  }
+}
+```
+
+| Before | After |
+|--------|-------|
+| `{ "$path": "/..." }` | `{ "$state": "/..." }` |
+| `{ "$data": "/..." }` | `{ "$state": "/..." }` |
+
+## Two-Way Binding
+
+Form components no longer use `valuePath` / `statePath` props. Instead, use `$bindState` expressions on the value prop, and `useBoundProp` in your registry.
+
+**Before (catalog):**
+
+```typescript
+Input: {
+  props: z.object({
+    label: z.string(),
+    valuePath: z.string(),
+    placeholder: z.string().optional(),
+  }),
+}
+```
+
+**Before (spec):**
+
+```json
+{
+  "type": "Input",
+  "props": { "label": "Email", "valuePath": "/form/email" }
+}
+```
+
+**Before (registry):**
+
+```tsx
+Input: ({ props }) => {
+  const [value, setValue] = useStateBinding(props.valuePath);
+  return <input value={value ?? ""} onChange={(e) => setValue(e.target.value)} />;
+}
+```
+
+**After (catalog):**
+
+```typescript
+Input: {
+  props: z.object({
+    label: z.string(),
+    value: z.string().optional(),
+    placeholder: z.string().optional(),
+  }),
+}
+```
+
+**After (spec):**
+
+```json
+{
+  "type": "Input",
+  "props": { "label": "Email", "value": { "$bindState": "/form/email" } }
+}
+```
+
+**After (registry):**
+
+```tsx
+Input: ({ props, bindings }) => {
+  const [value, setValue] = useBoundProp<string>(props.value, bindings?.value);
+  return <input value={value ?? ""} onChange={(e) => setValue(e.target.value)} />;
+}
+```
+
+`$bindState` reads from and writes to the given state path. Inside repeat scopes, use `$bindItem` to bind to a field on the current item:
+
+```json
+{
+  "type": "Checkbox",
+  "props": { "checked": { "$bindItem": "completed" } }
+}
+```
+
+## Visibility Conditions
+
+Visibility conditions have been renamed to use `$state`, `$and`, and `$or`.
+
+**Before:**
+
+```json
+{ "path": "/isAdmin" }
+{ "eq": [{ "path": "/role" }, "admin"] }
+{ "and": [{ "path": "/isAdmin" }, { "path": "/feature" }] }
+{ "or": [{ "path": "/roleA" }, { "path": "/roleB" }] }
+```
+
+**After:**
+
+```json
+{ "$state": "/isAdmin" }
+{ "$state": "/role", "eq": "admin" }
+{ "$and": [{ "$state": "/isAdmin" }, { "$state": "/feature" }] }
+{ "$or": [{ "$state": "/roleA" }, { "$state": "/roleB" }] }
+```
+
+You can also use an array as shorthand for `$and`:
+
+```json
+[{ "$state": "/isAdmin" }, { "$state": "/feature" }]
+```
+
+Inside repeat scopes, use `$item` and `$index`:
+
+```json
+{ "$item": "isActive" }
+{ "$index": true, "eq": 0 }
+```
+
+## Event System
+
+Components now use `emit` to fire named events. `onAction` has been removed.
+
+**Before:**
+
+```tsx
+Button: ({ props, onAction }) => (
+  <button onClick={() => onAction?.("press")}>{props.label}</button>
+)
+```
+
+**After:**
+
+```tsx
+Button: ({ props, emit }) => (
+  <button onClick={() => emit("press")}>{props.label}</button>
+)
+```
+
+`emit` is always defined (never `undefined`), so optional chaining is not needed.
+
+## Actions Context
+
+`dispatch` has been renamed to `execute`, and the provider prop has been renamed from `actionHandlers` to `handlers`.
+
+**Before:**
+
+```tsx
+const { dispatch } = useActions();
+dispatch({ action: "submit", params: {} });
+
+<ActionProvider actionHandlers={myHandlers}>
+```
+
+**After:**
+
+```tsx
+const { execute } = useActions();
+execute({ action: "submit", params: {} });
+
+<ActionProvider handlers={myHandlers}>
+```
+
+## Repeat / List Rendering
+
+The `repeat` field now uses `statePath` instead of `path`.
+
+**Before:**
+
+```json
+{
+  "type": "Column",
+  "repeat": { "path": "/todos", "key": "id" },
+  "children": ["todo-item"]
+}
+```
+
+**After:**
+
+```json
+{
+  "type": "Column",
+  "repeat": { "statePath": "/todos", "key": "id" },
+  "children": ["todo-item"]
+}
+```
+
+## Catalog Creation
+
+`createCatalog` and `generateSystemPrompt` have been replaced by `defineSchema` + `defineCatalog`.
+
+**Before:**
+
+```typescript
+import { createCatalog, generateSystemPrompt } from "@json-render/core";
+
+const catalog = createCatalog({
+  name: "my-app",
+  components: { /* ... */ },
+  actions: { /* ... */ },
+});
+
+const prompt = generateSystemPrompt(catalog);
+```
+
+**After:**
+
+```typescript
+import { defineCatalog } from "@json-render/core";
+import { schema } from "@json-render/react/schema";
+
+const catalog = defineCatalog(schema, {
+  components: { /* ... */ },
+  actions: { /* ... */ },
+});
+
+const prompt = catalog.prompt();
+
+// Chat mode prompt
+const chatPrompt = catalog.prompt({ mode: "chat" });
+```
+
+## Validation
+
+`ValidationCheck` now uses `type` instead of `fn`, `ValidationProvider` uses `customFunctions` instead of `functions`, and `useFieldValidation` takes a config object instead of a checks array.
+
+**Before:**
+
+```json
+{ "fn": "required", "message": "Required" }
+{ "fn": "minLength", "args": { "length": 8 }, "message": "Too short" }
+```
+
+**After:**
+
+```json
+{ "type": "required", "message": "Required" }
+{ "type": "minLength", "args": { "min": 8 }, "message": "Too short" }
+```
+
+| Before | After |
+|--------|-------|
+| `{ fn: "required" }` | `{ type: "required" }` |
+| `ValidationProvider functions={...}` | `ValidationProvider customFunctions={...}` |
+| `useFieldValidation(path, checks)` | `useFieldValidation(path, config)` where config is `{ checks, validateOn? }` |
+
+## Visibility Provider
+
+The `auth` prop has been removed from `VisibilityProvider`. Auth state should be modeled as regular state.
+
+**Before:**
+
+```tsx
+<VisibilityProvider auth={{ isSignedIn: true, role: "admin" }}>
+```
+
+```json
+{ "auth": "signedIn" }
+```
+
+**After:**
+
+```tsx
+<StateProvider initialState={{ auth: { isSignedIn: true, role: "admin" } }}>
+  <VisibilityProvider>
+```
+
+```json
+{ "$state": "/auth/isSignedIn" }
+```
+
+## Codegen
+
+`traverseTree` has been renamed to `traverseSpec`, `SpecVisitor` to `TreeVisitor`, and the visitor callback now receives a `key` parameter.
+
+**Before:**
+
+```typescript
+import { traverseTree } from "@json-render/codegen";
+
+traverseTree(tree, (element) => {
+  // ...
+});
+```
+
+**After:**
+
+```typescript
+import { traverseSpec } from "@json-render/codegen";
+
+traverseSpec(spec, (element, key) => {
+  // ...
+});
+```
+
+## Action Params
+
+Action params in specs now use `statePath` instead of `path`.
+
+**Before:**
+
+```json
+{
+  "on": {
+    "press": { "action": "setState", "params": { "path": "/count", "value": 0 } }
+  }
+}
+```
+
+**After:**
+
+```json
+{
+  "on": {
+    "press": { "action": "setState", "params": { "statePath": "/count", "value": 0 } }
+  }
+}
+```
+
+## Removed Exports
+
+The following exports have been removed from `@json-render/core`:
+
+| Removed | Replacement |
+|---------|-------------|
+| `createCatalog` | `defineCatalog(schema, config)` |
+| `generateCatalogPrompt` | `catalog.prompt()` |
+| `generateSystemPrompt` | `catalog.prompt()` |
+| `ComponentDefinition` | Use catalog component config directly |
+| `CatalogConfig` | Use `defineCatalog` parameters |
+| `SystemPromptOptions` | Use `PromptOptions` |
+| `LogicExpression` | Use `VisibilityCondition` |
+| `AuthState` | Model auth as regular state (e.g. `/auth/isSignedIn`) |
+| `evaluateLogicExpression` | Use `evaluateVisibility` |
+| `createRendererFromCatalog` | Use `defineRegistry` |
+| `traverseTree` (codegen) | Use `traverseSpec` |

apps/web/app/(main)/docs/openapi/page.mdx

@@ -0,0 +1,282 @@
+export const metadata = { title: "OpenAPI Integration" }
+
+# OpenAPI Integration
+
+Use json-render to generate dynamic forms and UIs from [OpenAPI/Swagger](https://swagger.io/specification/) schemas.
+
+<div className="rounded-lg border border-amber-500/50 bg-amber-500/10 p-4 mb-8">
+  <p className="text-sm text-amber-700 dark:text-amber-300">
+    <strong>Concept:</strong> This page demonstrates how json-render can support OpenAPI schemas. The examples are illustrative and may require adaptation for production use.
+  </p>
+</div>
+
+## Why OpenAPI?
+
+OpenAPI specifications describe your API's endpoints, request bodies, and response schemas. By converting OpenAPI schemas to json-render specs, you can:
+
+- Automatically generate forms for API endpoints
+- Display API responses with type-aware rendering
+- Keep your UI in sync with your API schema
+- Let AI generate UIs that match your API contracts
+
+## Example OpenAPI Schema
+
+A typical OpenAPI schema for a request body:
+
+```json
+{
+  "openapi": "3.0.0",
+  "paths": {
+    "/users": {
+      "post": {
+        "summary": "Create a new user",
+        "operationId": "createUser",
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/CreateUserRequest"
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "CreateUserRequest": {
+        "type": "object",
+        "required": ["email", "name"],
+        "properties": {
+          "name": {
+            "type": "string",
+            "description": "User's full name",
+            "minLength": 1,
+            "maxLength": 100
+          },
+          "email": {
+            "type": "string",
+            "format": "email",
+            "description": "User's email address"
+          },
+          "age": {
+            "type": "integer",
+            "minimum": 0,
+            "maximum": 150,
+            "description": "User's age"
+          },
+          "role": {
+            "type": "string",
+            "enum": ["admin", "user", "guest"],
+            "default": "user",
+            "description": "User's role"
+          },
+          "preferences": {
+            "type": "object",
+            "properties": {
+              "newsletter": {
+                "type": "boolean",
+                "default": false
+              },
+              "theme": {
+                "type": "string",
+                "enum": ["light", "dark", "system"]
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
+```
+
+## Define an OpenAPI-to-UI Catalog
+
+Create components that map to OpenAPI data types:
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+import { z } from 'zod';
+
+export const openapiCatalog = defineCatalog(schema, {
+  components: {
+    Form: {
+      description: 'API form container',
+      props: z.object({
+        operationId: z.string(),
+        endpoint: z.string(),
+        method: z.enum(['GET', 'POST', 'PUT', 'PATCH', 'DELETE']),
+        title: z.string().optional(),
+        description: z.string().optional(),
+      }),
+    },
+    StringField: {
+      description: 'String input field',
+      props: z.object({
+        name: z.string(),
+        label: z.string(),
+        description: z.string().optional(),
+        required: z.boolean().optional(),
+        format: z.enum(['text', 'email', 'uri', 'uuid', 'date', 'date-time', 'password']).optional(),
+        minLength: z.number().optional(),
+        maxLength: z.number().optional(),
+        pattern: z.string().optional(),
+        placeholder: z.string().optional(),
+        defaultValue: z.string().optional(),
+      }),
+    },
+    NumberField: {
+      description: 'Number input field',
+      props: z.object({
+        name: z.string(),
+        label: z.string(),
+        description: z.string().optional(),
+        required: z.boolean().optional(),
+        type: z.enum(['integer', 'number']).optional(),
+        minimum: z.number().optional(),
+        maximum: z.number().optional(),
+        defaultValue: z.number().optional(),
+      }),
+    },
+    BooleanField: {
+      description: 'Boolean toggle field',
+      props: z.object({
+        name: z.string(),
+        label: z.string(),
+        description: z.string().optional(),
+        defaultValue: z.boolean().optional(),
+      }),
+    },
+    EnumField: {
+      description: 'Enum selection field',
+      props: z.object({
+        name: z.string(),
+        label: z.string(),
+        description: z.string().optional(),
+        required: z.boolean().optional(),
+        options: z.array(z.object({
+          value: z.string(),
+          label: z.string().optional(),
+        })),
+        defaultValue: z.string().optional(),
+      }),
+    },
+    ObjectField: {
+      description: 'Nested object group',
+      props: z.object({
+        name: z.string(),
+        label: z.string(),
+        description: z.string().optional(),
+        collapsible: z.boolean().optional(),
+      }),
+    },
+  },
+  actions: {
+    submit: {
+      description: 'Submit form to API endpoint',
+      params: z.object({ operationId: z.string() }),
+    },
+    reset: {
+      description: 'Reset form to defaults',
+      params: z.object({}),
+    },
+  },
+});
+```
+
+## Convert OpenAPI Schema to Spec
+
+Transform OpenAPI schemas into json-render specs by recursively walking the schema properties and mapping each type to the corresponding catalog component. The converter handles nested objects, enums, arrays, and all primitive types.
+
+## Usage Example
+
+```tsx
+'use client';
+
+import { OpenAPIForm } from './openapi-form';
+import { operationToSpec } from './openapi-to-spec';
+
+// Your OpenAPI schema (typically loaded from your API)
+const createUserSchema = {
+  type: 'object',
+  required: ['email', 'name'],
+  properties: {
+    name: { type: 'string', description: "User's full name" },
+    email: { type: 'string', format: 'email', description: "User's email" },
+    age: { type: 'integer', minimum: 0, maximum: 150 },
+    role: { type: 'string', enum: ['admin', 'user', 'guest'], default: 'user' },
+  },
+};
+
+// Convert to spec
+const spec = operationToSpec(
+  'createUser',
+  'POST',
+  '/api/users',
+  createUserSchema,
+  'Create User',
+  'Add a new user to the system',
+);
+
+export function CreateUserForm() {
+  const handleSubmit = async (data: Record<string, unknown>) => {
+    const response = await fetch('/api/users', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(data),
+    });
+
+    if (response.ok) {
+      console.log('User created!');
+    }
+  };
+
+  return <OpenAPIForm spec={spec} onSubmit={handleSubmit} />;
+}
+```
+
+## Auto-generating from OpenAPI Document
+
+Load and parse an OpenAPI document to generate forms for all operations:
+
+```typescript
+import SwaggerParser from '@apidevtools/swagger-parser';
+import { operationToSpec } from './openapi-to-spec';
+
+export async function loadOpenAPISpecs(specUrl: string) {
+  const api = await SwaggerParser.dereference(specUrl);
+  const specs: Record<string, any> = {};
+
+  for (const [path, methods] of Object.entries(api.paths)) {
+    for (const [method, operation] of Object.entries(methods)) {
+      if (!operation.requestBody?.content?.['application/json']?.schema) continue;
+
+      const schema = operation.requestBody.content['application/json'].schema;
+      const operationId = operation.operationId || `${method}_${path.replace(/\//g, '_')}`;
+
+      specs[operationId] = operationToSpec(
+        operationId,
+        method,
+        path,
+        schema,
+        operation.summary,
+        operation.description,
+      );
+    }
+  }
+
+  return specs;
+}
+
+// Usage
+const specs = await loadOpenAPISpecs('https://api.example.com/openapi.json');
+// specs.createUser, specs.updateUser, etc.
+```
+
+## Next
+
+Learn about [streaming](/docs/streaming) for progressive UI rendering.

apps/web/app/(main)/docs/page.mdx

@@ -0,0 +1,98 @@
+export const metadata = { title: "Introduction" }
+
+# Introduction
+
+json-render is a framework for **Generative UI** — AI-generated interfaces that are safe, predictable, and render natively on any platform.
+
+## What is Generative UI?
+
+Most AI integrations treat the interface as fixed. Developers build layouts ahead of time, and AI fills in the data — a chatbot response, a summary, a recommendation. The UI itself never changes.
+
+**Generative UI is different.** The AI generates the interface itself: which components to show, how to arrange them, what data to bind, what actions to wire up. Every response can produce a unique, purpose-built UI tailored to the user's request.
+
+The challenge is that unconstrained AI output is unpredictable. It can hallucinate component names, produce invalid structures, or generate unsafe code. You need a way to let AI be creative with layout and composition while keeping it within boundaries you control.
+
+That is what json-render does. You define a **catalog** of components and actions. AI generates JSON constrained to that catalog. Your components render the result natively — on web or mobile — with full type safety and no arbitrary code execution.
+
+## How json-render Works
+
+### 1. Define your catalog
+
+A catalog declares what AI can use: components with typed props, actions with typed params.
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+import { z } from 'zod';
+
+export const catalog = defineCatalog(schema, {
+  components: {
+    Card: {
+      props: z.object({ title: z.string() }),
+      slots: ["default"],
+    },
+    Metric: {
+      props: z.object({
+        label: z.string(),
+        value: z.string(),
+      }),
+    },
+  },
+});
+```
+
+### 2. AI generates a spec
+
+Given a prompt like "show me a revenue dashboard", AI outputs a JSON spec — a flat tree of elements constrained to your catalog:
+
+```json
+{
+  "root": "card-1",
+  "elements": {
+    "card-1": {
+      "type": "Card",
+      "props": { "title": "Revenue Dashboard" },
+      "children": ["metric-1", "metric-2"]
+    },
+    "metric-1": {
+      "type": "Metric",
+      "props": { "label": "Total Revenue", "value": "$48,200" }
+    },
+    "metric-2": {
+      "type": "Metric",
+      "props": { "label": "Growth", "value": "+12%" }
+    }
+  }
+}
+```
+
+### 3. Your components render it
+
+Map catalog types to real components with a registry, then render the spec:
+
+```tsx
+import { Renderer, StateProvider, VisibilityProvider } from '@json-render/react';
+
+<StateProvider initialState={{}}>
+  <VisibilityProvider>
+    <Renderer spec={spec} registry={registry} />
+  </VisibilityProvider>
+</StateProvider>
+```
+
+The result is a native UI built from your own components — not an iframe, not markdown, not generated code. The AI chose the structure; you control everything else.
+
+## Key Concepts
+
+- **[Catalog](/docs/catalog)** — Define the components, actions, and validation functions AI can use. This is the contract between your app and the AI.
+- **[Registry](/docs/registry)** — Map catalog types to platform-specific implementations. React components on web, React Native views on mobile.
+- **[Specs](/docs/specs)** — The JSON output AI generates. A flat tree of typed elements with props, children, data bindings, and visibility conditions.
+- **[Streaming](/docs/streaming)** — Render progressively as the AI responds. Each JSONL patch adds to the spec and the UI updates in real time.
+- **[Data Binding](/docs/data-binding)** — Bind props to runtime data with `$state` paths, repeat elements over arrays, and wire two-way input bindings.
+- **[Visibility](/docs/visibility)** — Show or hide elements based on state conditions. The AI can generate conditional UIs without writing logic.
+- **[Generation Modes](/docs/generation-modes)** — Generate standalone UI (playground/builder) or inline UI within a chat conversation.
+
+## Next
+
+- [Installation](/docs/installation) — Add json-render to your project
+- [Quick Start](/docs/quick-start) — Build your first generative UI in 5 minutes

apps/web/app/(main)/docs/page.tsx

@@ -1,67 +0,0 @@
-export const metadata = {
-  title: "Introduction | json-render",
-};
-
-export default function DocsPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Introduction</h1>
-      <p className="text-muted-foreground mb-8">
-        Predictable. Guardrailed. Fast. Let users generate dashboards, widgets,
-        apps, and data visualizations from prompts.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">What is json-render?</h2>
-      <p className="text-sm text-muted-foreground mb-4 leading-relaxed">
-        json-render lets end users generate UI from natural language prompts —
-        safely constrained to components you define. You set the guardrails:
-        what components exist, what props they take, what actions are available.
-        AI generates JSON that matches your schema, and your components render
-        it natively.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Why json-render?</h2>
-      <div className="space-y-4 mb-8">
-        <div>
-          <h3 className="font-medium mb-1">Guardrailed</h3>
-          <p className="text-sm text-muted-foreground">
-            AI can only use components in your catalog. No arbitrary code
-            generation.
-          </p>
-        </div>
-        <div>
-          <h3 className="font-medium mb-1">Predictable</h3>
-          <p className="text-sm text-muted-foreground">
-            JSON output matches your schema, every time. Actions are declared by
-            name, you control what they do.
-          </p>
-        </div>
-        <div>
-          <h3 className="font-medium mb-1">Fast</h3>
-          <p className="text-sm text-muted-foreground">
-            Stream and render progressively as the model responds. No waiting
-            for completion.
-          </p>
-        </div>
-      </div>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">How it works</h2>
-      <ol className="list-decimal list-inside space-y-2 text-sm text-muted-foreground">
-        <li>
-          Define the guardrails — what components, actions, and data bindings AI
-          can use
-        </li>
-        <li>
-          Users prompt — end users describe what they want in natural language
-        </li>
-        <li>
-          AI generates JSON — output is always predictable, constrained to your
-          catalog
-        </li>
-        <li>
-          Render fast — stream and render progressively as the model responds
-        </li>
-      </ol>
-    </article>
-  );
-}

apps/web/app/(main)/docs/quick-start/page.mdx

@@ -0,0 +1,171 @@
+export const metadata = { title: "Quick Start" }
+
+# Quick Start
+
+Get up and running with json-render in 5 minutes.
+
+## 1. Define your catalog
+
+Create a catalog that defines what components AI can use:
+
+```typescript
+// lib/catalog.ts
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+import { z } from 'zod';
+
+export const catalog = defineCatalog(schema, {
+  components: {
+    Card: {
+      props: z.object({
+        title: z.string(),
+        description: z.string().nullable(),
+      }),
+      slots: ["default"],
+      description: "Container card with optional title",
+    },
+    Button: {
+      props: z.object({
+        label: z.string(),
+        action: z.string().nullable(),
+      }),
+      description: "Clickable button that triggers an action",
+    },
+    Text: {
+      props: z.object({
+        content: z.string(),
+      }),
+      description: "Text paragraph",
+    },
+  },
+  actions: {
+    submit: {
+      params: z.object({ formId: z.string() }),
+      description: "Submit a form",
+    },
+    navigate: {
+      params: z.object({ url: z.string() }),
+      description: "Navigate to a URL",
+    },
+  },
+});
+```
+
+## 2. Define your components
+
+Use `defineRegistry` to map catalog types to React components. Each component receives type-safe `props`, `children`, and `emit`:
+
+```tsx
+// lib/registry.tsx
+import { defineRegistry } from '@json-render/react';
+import { catalog } from './catalog';
+
+export const { registry } = defineRegistry(catalog, {
+  components: {
+    Card: ({ props, children }) => (
+      <div className="p-4 border rounded-lg">
+        <h2 className="font-bold">{props.title}</h2>
+        {props.description && (
+          <p className="text-gray-600">{props.description}</p>
+        )}
+        {children}
+      </div>
+    ),
+    Button: ({ props, emit }) => (
+      <button
+        className="px-4 py-2 bg-blue-500 text-white rounded"
+        onClick={() => emit("press")}
+      >
+        {props.label}
+      </button>
+    ),
+    Text: ({ props }) => (
+      <p>{props.content}</p>
+    ),
+  },
+});
+```
+
+## 3. Create an API route
+
+Set up a streaming API route for AI generation:
+
+```typescript
+// app/api/generate/route.ts
+import { streamText } from 'ai';
+import { catalog } from '@/lib/catalog';
+
+export async function POST(req: Request) {
+  const { prompt } = await req.json();
+
+  // Generate system prompt from catalog
+  const systemPrompt = catalog.prompt();
+
+  const result = streamText({
+    model: 'anthropic/claude-haiku-4.5',
+    system: systemPrompt,
+    prompt,
+  });
+
+  return result.toTextStreamResponse();
+}
+```
+
+## 4. Render the UI
+
+Use providers and the `Renderer` with your registry to display AI-generated UI:
+
+```tsx
+// app/page.tsx
+'use client';
+
+import { Renderer, StateProvider, ActionProvider, VisibilityProvider, ValidationProvider, useUIStream } from '@json-render/react';
+import { registry } from '@/lib/registry';
+
+export default function Page() {
+  const { spec, isStreaming, send } = useUIStream({
+    api: '/api/generate',
+  });
+
+  const handleSubmit = (e: React.FormEvent<HTMLFormElement>) => {
+    e.preventDefault();
+    const formData = new FormData(e.currentTarget);
+    send(formData.get('prompt') as string);
+  };
+
+  return (
+    <StateProvider initialState={{}}>
+      <VisibilityProvider>
+        <ActionProvider handlers={{
+          submit: (params) => console.log('Submit:', params),
+          navigate: (params) => console.log('Navigate:', params),
+        }}>
+          <ValidationProvider customFunctions={{}}>
+            <form onSubmit={handleSubmit}>
+              <input
+                name="prompt"
+                placeholder="Describe what you want..."
+                className="border p-2 rounded"
+              />
+              <button type="submit" disabled={isStreaming}>
+                Generate
+              </button>
+            </form>
+
+            <div className="mt-8">
+              <Renderer spec={spec} registry={registry} loading={isStreaming} />
+            </div>
+          </ValidationProvider>
+        </ActionProvider>
+      </VisibilityProvider>
+    </StateProvider>
+  );
+}
+```
+
+## Next steps
+
+- Learn about [catalogs](/docs/catalog) in depth
+- Explore [data binding](/docs/data-binding) for dynamic values
+- Add [action handlers](/docs/registry#action-handlers) for interactivity
+- Implement [conditional visibility](/docs/visibility)

apps/web/app/(main)/docs/quick-start/page.tsx

@@ -1,205 +0,0 @@
-import Link from "next/link";
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Quick Start | json-render",
-};
-
-export default function QuickStartPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Quick Start</h1>
-      <p className="text-muted-foreground mb-8">
-        Get up and running with json-render in 5 minutes.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        1. Define your catalog
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Create a catalog that defines what components AI can use:
-      </p>
-      <Code lang="typescript">{`// lib/catalog.ts
-import { createCatalog } from '@json-render/core';
-import { z } from 'zod';
-
-export const catalog = createCatalog({
-  components: {
-    Card: {
-      props: z.object({
-        title: z.string(),
-        description: z.string().nullable(),
-      }),
-      hasChildren: true,
-    },
-    Button: {
-      props: z.object({
-        label: z.string(),
-        action: z.string(),
-      }),
-    },
-    Text: {
-      props: z.object({
-        content: z.string(),
-      }),
-    },
-  },
-  actions: {
-    submit: {
-      params: z.object({ formId: z.string() }),
-    },
-    navigate: {
-      params: z.object({ url: z.string() }),
-    },
-  },
-});`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        2. Create your components
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Register React components that render each catalog type:
-      </p>
-      <Code lang="tsx">{`// components/registry.tsx
-export const registry = {
-  Card: ({ element, children }) => (
-    <div className="p-4 border rounded-lg">
-      <h2 className="font-bold">{element.props.title}</h2>
-      {element.props.description && (
-        <p className="text-gray-600">{element.props.description}</p>
-      )}
-      {children}
-    </div>
-  ),
-  Button: ({ element, onAction }) => (
-    <button
-      className="px-4 py-2 bg-blue-500 text-white rounded"
-      onClick={() => onAction(element.props.action, {})}
-    >
-      {element.props.label}
-    </button>
-  ),
-  Text: ({ element }) => (
-    <p>{element.props.content}</p>
-  ),
-};`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        3. Create an API route
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Set up a streaming API route for AI generation:
-      </p>
-      <Code lang="typescript">{`// app/api/generate/route.ts
-import { streamText } from 'ai';
-import { generateCatalogPrompt } from '@json-render/core';
-import { catalog } from '@/lib/catalog';
-
-export async function POST(req: Request) {
-  const { prompt } = await req.json();
-  const systemPrompt = generateCatalogPrompt(catalog);
-
-  const result = streamText({
-    model: 'anthropic/claude-haiku-4.5',
-    system: systemPrompt,
-    prompt,
-  });
-
-  return new Response(result.textStream, {
-    headers: { 'Content-Type': 'text/plain; charset=utf-8' },
-  });
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">4. Render the UI</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Use the providers and renderer to display AI-generated UI:
-      </p>
-      <Code lang="tsx">{`// app/page.tsx
-'use client';
-
-import { DataProvider, ActionProvider, VisibilityProvider, Renderer, useUIStream } from '@json-render/react';
-import { registry } from '@/components/registry';
-
-export default function Page() {
-  const { tree, isLoading, generate } = useUIStream({
-    endpoint: '/api/generate',
-  });
-
-  const handleSubmit = (e: React.FormEvent<HTMLFormElement>) => {
-    e.preventDefault();
-    const formData = new FormData(e.currentTarget);
-    generate(formData.get('prompt') as string);
-  };
-
-  return (
-    <DataProvider initialData={{}}>
-      <VisibilityProvider>
-        <ActionProvider handlers={{
-          submit: (params) => console.log('Submit:', params),
-          navigate: (params) => console.log('Navigate:', params),
-        }}>
-          <form onSubmit={handleSubmit}>
-            <input
-              name="prompt"
-              placeholder="Describe what you want..."
-              className="border p-2 rounded"
-            />
-            <button type="submit" disabled={isLoading}>
-              Generate
-            </button>
-          </form>
-
-          <div className="mt-8">
-            <Renderer tree={tree} registry={registry} />
-          </div>
-        </ActionProvider>
-      </VisibilityProvider>
-    </DataProvider>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Next steps</h2>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-2">
-        <li>
-          Learn about{" "}
-          <Link
-            href="/docs/catalog"
-            className="text-foreground hover:underline"
-          >
-            catalogs
-          </Link>{" "}
-          in depth
-        </li>
-        <li>
-          Explore{" "}
-          <Link
-            href="/docs/data-binding"
-            className="text-foreground hover:underline"
-          >
-            data binding
-          </Link>{" "}
-          for dynamic values
-        </li>
-        <li>
-          Add{" "}
-          <Link
-            href="/docs/actions"
-            className="text-foreground hover:underline"
-          >
-            actions
-          </Link>{" "}
-          for interactivity
-        </li>
-        <li>
-          Implement{" "}
-          <Link
-            href="/docs/visibility"
-            className="text-foreground hover:underline"
-          >
-            conditional visibility
-          </Link>
-        </li>
-      </ul>
-    </article>
-  );
-}

apps/web/app/(main)/docs/registry/page.mdx

@@ -0,0 +1,277 @@
+export const metadata = { title: "Registry" }
+
+# Registry
+
+A registry maps your [catalog](/docs/catalog) definitions to platform-specific implementations. The catalog defines *what* AI can generate — the registry provides the *how*.
+
+What a registry contains depends on the schema you use. Each package defines its own schema, which determines the shape of both the catalog and the registry.
+
+- **`@json-render/react`** — Components (React elements) and action handlers
+- **`@json-render/react-native`** — Components (React Native elements) and action handlers
+- **`@json-render/remotion`** — Clip components, transitions, and effects
+
+## @json-render/react
+
+### defineRegistry
+
+Use `defineRegistry` to create a type-safe registry from your catalog. Pass your components, actions, or both:
+
+```tsx
+import { defineRegistry } from '@json-render/react';
+import { myCatalog } from './catalog';
+
+export const { registry, handlers, executeAction } = defineRegistry(myCatalog, {
+  components: {
+    Card: ({ props, children }) => (
+      <div className="card">
+        <h2>{props.title}</h2>
+        {props.description && <p>{props.description}</p>}
+        {children}
+      </div>
+    ),
+
+    Button: ({ props, emit }) => (
+      <button onClick={() => emit("press")}>
+        {props.label}
+      </button>
+    ),
+  },
+
+  actions: {
+    submit_form: async (params, setState) => {
+      const res = await fetch('/api/submit', {
+        method: 'POST',
+        body: JSON.stringify(params),
+      });
+      const result = await res.json();
+      setState((prev) => ({ ...prev, formResult: result }));
+    },
+
+    export_data: async (params) => {
+      const blob = await generateExport(params.format);
+      downloadBlob(blob, `export.${params.format}`);
+    },
+  },
+});
+```
+
+The returned object contains:
+
+- `registry` — component registry for `<Renderer />`
+- `handlers` — factory for ActionProvider-compatible handlers
+- `executeAction` — imperative action dispatch (for use outside the React tree)
+
+### Component Props
+
+Each component receives a `ComponentContext` object:
+
+```typescript
+interface ComponentContext {
+  props: T;                                // Type-safe props from your catalog
+  children?: React.ReactNode;              // Rendered children (for slot components)
+  emit: (event: string) => void;           // Emit a named event (e.g. "press")
+  loading?: boolean;                       // Whether the renderer is in a loading state
+  bindings?: Record<string, string>;       // State paths from $bindState/$bindItem expressions
+}
+```
+
+Props are automatically inferred from your catalog, so `props.title` is typed as `string` if your catalog defines it that way.
+
+#### Using `bindings` for two-way binding
+
+When a spec uses `{ "$bindState": "/path" }` or `{ "$bindItem": "field" }` on a prop, the renderer resolves the **value** into `props` and provides the **write-back path** in `bindings`. Use the `useBoundProp` hook to wire both together:
+
+```tsx
+import { useBoundProp, defineRegistry } from '@json-render/react';
+
+// Inside your registry:
+TextInput: ({ props, bindings }) => {
+  const [value, setValue] = useBoundProp<string>(props.value, bindings?.value);
+  return (
+    <input
+      value={value ?? ""}
+      onChange={(e) => setValue(e.target.value)}
+    />
+  );
+},
+```
+
+`useBoundProp` returns `[resolvedValue, setter]`. The setter writes to the bound state path. If no binding exists (the prop is a literal), the setter is a no-op.
+
+### Action Handlers
+
+Instead of AI generating arbitrary code, it declares *intent* by name. Your application provides the implementation. This is a core guardrail.
+
+Actions are declared in your [catalog](/docs/catalog). The `@json-render/react` schema supports an `actions` key where you define what operations AI can trigger:
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react';
+import { z } from 'zod';
+
+const catalog = defineCatalog(schema, {
+  components: { /* ... */ },
+  actions: {
+    submit_form: {
+      params: z.object({
+        formId: z.string(),
+      }),
+      description: 'Submit a form',
+    },
+    export_data: {
+      params: z.object({
+        format: z.enum(['csv', 'pdf', 'json']),
+      }),
+    },
+    navigate: {
+      params: z.object({
+        url: z.string(),
+      }),
+    },
+  },
+});
+```
+
+Action handlers receive `(params, setState, state)` and are defined inside `defineRegistry`:
+
+```tsx
+export const { handlers, executeAction } = defineRegistry(catalog, {
+  actions: {
+    submit_form: async (params, setState) => {
+      const response = await fetch('/api/submit', {
+        method: 'POST',
+        body: JSON.stringify({ formId: params.formId }),
+      });
+      const result = await response.json();
+      setState((prev) => ({ ...prev, formResult: result }));
+    },
+
+    export_data: async (params) => {
+      const blob = await generateExport(params.format);
+      downloadBlob(blob, `export.${params.format}`);
+    },
+
+    navigate: (params) => {
+      window.location.href = params.url;
+    },
+  },
+});
+```
+
+### Data Binding
+
+Most data binding is handled automatically by the renderer — `$state`, `$item`, and `$index` expressions in props are resolved before your component receives them. See the [Data Binding](/docs/data-binding) guide for the full reference.
+
+For two-way binding (form inputs), use `{ "$bindState": "/path" }` on the natural value prop (or `{ "$bindItem": "field" }` inside repeat scopes). The renderer provides a `bindings` map with the state path for each bound prop. Use `useBoundProp` to get `[value, setValue]`:
+
+```tsx
+import { useBoundProp } from '@json-render/react';
+
+// Inside defineRegistry components:
+
+Input: ({ props, bindings }) => {
+  const [value, setValue] = useBoundProp<string>(
+    props.value,
+    bindings?.value
+  );
+  return (
+    <input
+      value={value ?? ''}
+      onChange={(e) => setValue(e.target.value)}
+      placeholder={props.placeholder}
+    />
+  );
+},
+```
+
+For read-only state access (e.g. displaying a value from state), use `$state` expressions in props — they are resolved before the component receives them. For custom logic, use `useStateStore` and `getByPath` from `@json-render/core`.
+
+### Using the Renderer
+
+Wire everything together with providers and the `<Renderer />` component:
+
+```tsx
+import { useMemo, useRef } from 'react';
+import {
+  Renderer,
+  StateProvider,
+  VisibilityProvider,
+  ActionProvider,
+} from '@json-render/react';
+import { registry, handlers } from './registry';
+
+function App({ spec, state, setState }) {
+  const stateRef = useRef(state);
+  const setStateRef = useRef(setState);
+  stateRef.current = state;
+  setStateRef.current = setState;
+
+  const actionHandlers = useMemo(
+    () => handlers(() => setStateRef.current, () => stateRef.current),
+    [],
+  );
+
+  return (
+    <StateProvider initialState={state}>
+      <VisibilityProvider>
+        <ActionProvider handlers={actionHandlers}>
+          <Renderer spec={spec} registry={registry} />
+        </ActionProvider>
+      </VisibilityProvider>
+    </StateProvider>
+  );
+}
+```
+
+## @json-render/react-native
+
+`@json-render/react-native` uses the same `defineRegistry` API. The only difference is that components return React Native elements instead of HTML:
+
+```tsx
+import { defineRegistry } from '@json-render/react-native';
+import { View, Text, Pressable } from 'react-native';
+
+export const { registry } = defineRegistry(catalog, {
+  components: {
+    Card: ({ props, children }) => (
+      <View style={styles.card}>
+        <Text style={styles.title}>{props.title}</Text>
+        {children}
+      </View>
+    ),
+
+    Button: ({ props, emit }) => (
+      <Pressable onPress={() => emit("press")}>
+        <Text>{props.label}</Text>
+      </Pressable>
+    ),
+  },
+});
+```
+
+See the [@json-render/react-native API reference](/docs/api/react-native) for the full API.
+
+## @json-render/remotion
+
+`@json-render/remotion` takes a different approach. Instead of `defineRegistry`, it uses a plain component registry with built-in standard components for video production:
+
+```tsx
+import { Renderer, standardComponents } from '@json-render/remotion';
+
+// Use the standard components directly
+<Renderer spec={timelineSpec} components={standardComponents} />
+
+// Or extend with your own
+const components = {
+  ...standardComponents,
+  CustomSlide: ({ clip }) => <AbsoluteFill>{/* ... */}</AbsoluteFill>,
+};
+```
+
+The Remotion schema also supports `transitions` and `effects` in the catalog rather than actions.
+
+See the [@json-render/remotion API reference](/docs/api/remotion) for the full API.
+
+## Next
+
+Learn about [data binding](/docs/data-binding) for dynamic values.

apps/web/app/(main)/docs/schemas/page.mdx

@@ -0,0 +1,147 @@
+export const metadata = { title: "Schemas" }
+
+# Schemas
+
+Schemas define the structure and validation rules for your UI specs.
+
+## What is a Schema?
+
+A schema defines the JSON structure that describes your UI. It includes:
+
+- **Element structure** — How components are nested and referenced
+- **Property types** — What props each component accepts
+- **Data binding syntax** — How to reference dynamic data
+- **Action format** — How user interactions are defined
+
+## Schema-Agnostic by Design
+
+json-render can work with any JSON schema. `@json-render/core` provides the primitives to define catalogs and renderers for any format:
+
+- **@json-render/react** — The built-in flat element tree schema
+- **[A2UI](/docs/a2ui)** — Google's Agent-to-User Interaction protocol
+- **[Adaptive Cards](/docs/adaptive-cards)** — Microsoft's platform-agnostic UI format
+- **AG-UI** — CopilotKit's Agent User Interaction Protocol
+- **OpenAPI/Swagger** — API documentation schemas for dynamic forms
+- **Custom schemas** — Design your own format tailored to your domain
+
+See the [Custom Schema guide](/docs/custom-schema) to learn how to implement support for any schema.
+
+## Built-in Schema
+
+`@json-render/react` uses a flat element tree schema with a root key and elements map:
+
+```json
+{
+  "root": "card-1",
+  "elements": {
+    "card-1": {
+      "type": "Card",
+      "props": { "title": "Dashboard" },
+      "children": ["text-1", "button-1"]
+    },
+    "text-1": {
+      "type": "Text",
+      "props": { "content": { "$state": "/user/name" } },
+      "children": []
+    },
+    "button-1": {
+      "type": "Button",
+      "props": { "label": "Click me" },
+      "children": []
+    }
+  }
+}
+```
+
+## Schema Components
+
+### Element Structure
+
+In the built-in schema, each element in the elements map has this structure:
+
+```typescript
+interface Element {
+  type: string;                // Component type from catalog
+  props: Record<string, any>;  // Component properties
+  children: string[];          // Array of child element keys
+  visible?: VisibilityCondition;  // Conditional display
+}
+```
+
+### Data Binding Syntax
+
+Reference dynamic data using `$state` expressions in props. The value is a JSON Pointer path into the state model:
+
+```json
+{
+  "type": "Text",
+  "props": {
+    "content": { "$state": "/user/name" },
+    "count": { "$state": "/items/count" }
+  },
+  "children": []
+}
+```
+
+json-render also supports `$item` and `$index` expressions for lists, two-way binding via `$bindState` / `$bindItem`, and conditional props. See [Data Binding](/docs/data-binding) for the full reference.
+
+### Action Format
+
+Actions are defined in the catalog and referenced from components. The renderer handles action execution:
+
+```typescript
+// In your catalog
+actions: {
+  navigate: {
+    params: z.object({ url: z.string() }),
+    description: 'Navigate to a URL',
+  },
+  apiCall: {
+    params: z.object({
+      endpoint: z.string(),
+      method: z.enum(['GET', 'POST', 'PUT', 'DELETE']),
+    }),
+    description: 'Make an API request',
+  },
+}
+```
+
+## Custom Schemas
+
+`@json-render/core` is schema-agnostic. You can define any JSON structure:
+
+```typescript
+import { z } from 'zod';
+
+// Define your own element schema
+const MyElementSchema = z.object({
+  component: z.string(),
+  settings: z.record(z.unknown()),
+  nested: z.array(z.lazy(() => MyElementSchema)).optional(),
+});
+
+// Define your own data binding format
+const BoundValue = z.object({
+  literal: z.string().optional(),
+  source: z.string().optional(),  // e.g., "/users/0/name"
+});
+
+// Define your own action format
+const ActionSchema = z.object({
+  name: z.string(),
+  context: z.record(z.unknown()).optional(),
+});
+```
+
+## Schema vs Catalog
+
+The schema and catalog work together but serve different purposes:
+
+- **Schema** — Defines the JSON structure (how elements are organized)
+- **Catalog** — Defines available components and their props (what can be used)
+
+The schema is the grammar; the catalog is the vocabulary.
+
+## Next
+
+Learn about [specs](/docs/specs) — the actual JSON documents that describe your UI.

apps/web/app/(main)/docs/specs/page.mdx

@@ -0,0 +1,292 @@
+export const metadata = { title: "Specs" }
+
+# Specs
+
+A spec is a JSON document that describes your UI.
+
+## What is a Spec?
+
+A spec (specification) is the actual JSON that describes a UI. It uses components from a [catalog](/docs/catalog) and can optionally follow a [schema](/docs/schemas). Specs can be:
+
+- Generated by AI in real-time
+- Stored in a database
+- Streamed progressively from a server
+- Hand-authored as JSON files
+
+json-render is schema-agnostic — your specs can follow any JSON structure you choose.
+
+## Example Specs
+
+### Simple Spec
+
+A basic spec using the `@json-render/react` schema. Note the flat structure with a `root` key and `elements` map:
+
+```json
+{
+  "root": "card-1",
+  "elements": {
+    "card-1": {
+      "type": "Card",
+      "props": { "title": "Welcome" },
+      "children": ["text-1"]
+    },
+    "text-1": {
+      "type": "Text",
+      "props": { "content": { "$state": "/user/greeting" } },
+      "children": []
+    }
+  }
+}
+```
+
+### Complex Spec
+
+A more complex spec with multiple nested elements:
+
+```json
+{
+  "root": "card-1",
+  "elements": {
+    "card-1": {
+      "type": "Card",
+      "props": { "title": "User Profile", "padding": "md" },
+      "children": ["row-1", "button-1"]
+    },
+    "row-1": {
+      "type": "Row",
+      "props": { "gap": "md" },
+      "children": ["avatar-1", "stack-1"]
+    },
+    "avatar-1": {
+      "type": "Avatar",
+      "props": { "src": { "$state": "/user/avatar" }, "alt": { "$state": "/user/name" } },
+      "children": []
+    },
+    "stack-1": {
+      "type": "Stack",
+      "props": { "gap": "sm" },
+      "children": ["name-text", "email-text"]
+    },
+    "name-text": {
+      "type": "Text",
+      "props": { "content": { "$state": "/user/name" }, "variant": "heading" },
+      "children": []
+    },
+    "email-text": {
+      "type": "Text",
+      "props": { "content": { "$state": "/user/email" }, "variant": "caption" },
+      "children": []
+    },
+    "button-1": {
+      "type": "Button",
+      "props": { "label": "Edit Profile" },
+      "children": []
+    }
+  }
+}
+```
+
+### Block-Level Spec
+
+A high-level spec using semantic blocks for page layouts:
+
+```json
+{
+  "root": "page",
+  "elements": {
+    "page": {
+      "type": "Page",
+      "props": {},
+      "children": ["header", "hero", "features", "footer"]
+    },
+    "header": {
+      "type": "Header",
+      "props": { "logo": "/logo.svg", "navItems": ["Products", "Pricing", "Docs"] },
+      "children": []
+    },
+    "hero": {
+      "type": "Hero",
+      "props": {
+        "title": "Build UIs with JSON",
+        "subtitle": "Let AI generate your interfaces",
+        "ctaLabel": "Get Started",
+        "ctaHref": "/docs"
+      },
+      "children": []
+    },
+    "features": {
+      "type": "Features",
+      "props": { "columns": 3 },
+      "children": ["feature-1", "feature-2", "feature-3"]
+    },
+    "feature-1": {
+      "type": "Feature",
+      "props": { "icon": "zap", "title": "Fast", "description": "Render UIs in milliseconds" },
+      "children": []
+    },
+    "feature-2": {
+      "type": "Feature",
+      "props": { "icon": "shield", "title": "Secure", "description": "Validate all specs against your catalog" },
+      "children": []
+    },
+    "feature-3": {
+      "type": "Feature",
+      "props": { "icon": "sparkles", "title": "AI-Ready", "description": "Generate prompts from your catalog" },
+      "children": []
+    },
+    "footer": {
+      "type": "Footer",
+      "props": { "copyright": "2025 Acme Inc", "links": ["Privacy", "Terms", "Contact"] },
+      "children": []
+    }
+  }
+}
+```
+
+## Spec Anatomy
+
+Specs are schema-agnostic — the JSON structure is entirely up to you. The examples below use the `root` + `elements` flat tree format from the `@json-render/react` schema, which is optimized for AI generation and streaming.
+
+### Root and Elements
+
+In the React schema, a spec has a `root` key pointing to the entry element, and an `elements` map containing all elements:
+
+```json
+{
+  "root": "card-1",
+  "elements": {
+    "card-1": {
+      "type": "Card",
+      "props": { "title": "My Card" },
+      "children": ["text-1"]
+    },
+    "text-1": { ... }
+  }
+}
+```
+
+### Element Structure
+
+Each element in the map has a consistent shape:
+
+```json
+{
+  "type": "ComponentName",
+  "props": { "label": "Hello" },
+  "children": ["child-1", "child-2"]
+}
+```
+
+- `type` — Component type from your catalog
+- `props` — Component properties
+- `children` — Array of child element keys
+
+### Dynamic Data
+
+Props can reference data from the state model using `$state` expressions. The value is a JSON Pointer (RFC 6901) path into the state:
+
+```json
+{
+  "type": "Metric",
+  "props": {
+    "label": "Total Revenue",
+    "value": { "$state": "/metrics/revenue" },
+    "change": { "$state": "/metrics/revenueChange" }
+  },
+  "children": []
+}
+```
+
+See [Data Binding](/docs/data-binding) for the full reference including `$item`, `$index`, repeat, and two-way binding.
+
+### Conditional Visibility
+
+Control when elements appear using the `visible` property:
+
+```json
+{
+  "type": "Alert",
+  "props": {
+    "message": "You have unsaved changes"
+  },
+  "children": [],
+  "visible": {
+    "$state": "/form/isDirty",
+    "eq": true
+  }
+}
+```
+
+## Working with Specs
+
+### Validating a Spec
+
+Use `validateSpec` from `@json-render/core` to check a spec for structural issues:
+
+```typescript
+import { validateSpec } from '@json-render/core';
+
+const result = validateSpec(spec);
+
+if (!result.valid) {
+  console.error('Invalid spec:', result.issues);
+}
+```
+
+### Rendering a Spec (React)
+
+With `@json-render/react`, wrap the `Renderer` in providers to supply state and visibility:
+
+```tsx
+import { Renderer, StateProvider, VisibilityProvider } from '@json-render/react';
+import { registry } from './registry';
+
+function MyApp({ spec, initialState }) {
+  return (
+    <StateProvider initialState={initialState}>
+      <VisibilityProvider>
+        <Renderer spec={spec} registry={registry} />
+      </VisibilityProvider>
+    </StateProvider>
+  );
+}
+```
+
+See the [@json-render/react API reference](/docs/api/react) for full provider and hook documentation.
+
+### Streaming a Spec (React)
+
+With `@json-render/react`, use the `useUIStream` hook to stream specs incrementally:
+
+```tsx
+import { useUIStream } from '@json-render/react';
+
+function GenerativeUI() {
+  const { spec, isStreaming } = useUIStream({
+    api: '/api/generate',
+  });
+
+  return (
+    <Renderer
+      spec={spec}
+      registry={registry}
+      loading={isStreaming}
+    />
+  );
+}
+```
+
+See [Streaming](/docs/streaming) for the full SpecStream format and server-side setup.
+
+## Spec Sources
+
+Specs can come from various sources:
+
+- **AI Generation** — LLMs generate specs based on prompts and catalog
+- **Database** — Store specs as JSON and load dynamically
+- **API Response** — Server returns specs based on user/context
+- **Static Files** — Pre-built specs for known UI patterns
+
+## Next
+
+Learn about [catalogs](/docs/catalog) — the vocabulary of components available in your specs.

apps/web/app/(main)/docs/streaming/page.mdx

@@ -0,0 +1,170 @@
+export const metadata = { title: "Streaming" }
+
+# Streaming
+
+Progressively render UI as AI generates it.
+
+## SpecStream Format
+
+json-render uses **SpecStream**, a JSONL-based streaming format where each line is a JSON patch operation that progressively builds your spec:
+
+```json
+{"op":"add","path":"/root","value":"root"}
+{"op":"add","path":"/elements/root","value":{"type":"Card","props":{"title":"Dashboard"},"children":["metric-1","metric-2"]}}
+{"op":"add","path":"/elements/metric-1","value":{"type":"Metric","props":{"label":"Revenue"}}}
+{"op":"add","path":"/elements/metric-2","value":{"type":"Metric","props":{"label":"Users"}}}
+```
+
+## Patch Operations (RFC 6902)
+
+SpecStream uses [RFC 6902 JSON Patch](https://datatracker.ietf.org/doc/html/rfc6902) operations:
+
+- `add` — Add a value at a path (creates or replaces for objects, inserts for arrays)
+- `remove` — Remove the value at a path
+- `replace` — Replace an existing value at a path
+- `move` — Move a value from one path to another (requires `from`)
+- `copy` — Copy a value from one path to another (requires `from`)
+- `test` — Assert that a value at a path equals the given value
+
+## Path Format
+
+Paths follow JSON Pointer (RFC 6901) into the spec object:
+
+```bash
+/root                       -> Root element key (string)
+/elements/card-1            -> Element with key "card-1"
+/elements/card-1/props      -> Props of card-1
+/elements/card-1/children   -> Children of card-1
+```
+
+## Server-Side Setup
+
+Ensure your API route streams properly:
+
+```typescript
+import { streamText } from 'ai';
+import { catalog } from '@/lib/catalog';
+
+export async function POST(req: Request) {
+  const { prompt } = await req.json();
+  
+  const result = streamText({
+    model: 'anthropic/claude-haiku-4.5',
+    system: catalog.prompt(),
+    prompt,
+  });
+
+  // Return as a streaming response
+  return result.toTextStreamResponse();
+}
+```
+
+## Low-Level SpecStream API
+
+For custom or framework-agnostic streaming implementations, use the SpecStream compiler from `@json-render/core` directly:
+
+```typescript
+import { createSpecStreamCompiler } from '@json-render/core';
+
+// Create a compiler for your spec type
+const compiler = createSpecStreamCompiler<MySpec>();
+const decoder = new TextDecoder();
+
+// Process streaming chunks from AI
+async function processStream(reader: ReadableStreamDefaultReader<Uint8Array>) {
+  while (true) {
+    const { done, value } = await reader.read();
+    if (done) break;
+
+    // Decode the Uint8Array chunk to a string
+    const chunk = decoder.decode(value, { stream: true });
+    const { result, newPatches } = compiler.push(chunk);
+    
+    if (newPatches.length > 0) {
+      // Update UI with partial result
+      setSpec(result);
+    }
+  }
+  
+  // Get final compiled result
+  return compiler.getResult();
+}
+```
+
+### One-Shot Compilation
+
+For non-streaming scenarios, compile entire SpecStream at once:
+
+```typescript
+import { compileSpecStream } from '@json-render/core';
+
+const jsonl = `{"op":"add","path":"/root","value":"card-1"}
+{"op":"add","path":"/elements/card-1","value":{"type":"Card","props":{"title":"Hello"},"children":[]}}`;
+
+const spec = compileSpecStream<Spec>(jsonl);
+// { root: "card-1", elements: { "card-1": { type: "Card", props: { title: "Hello" }, children: [] } } }
+```
+
+## Usage with React
+
+`@json-render/react` provides the `useUIStream` hook, which wraps the low-level compiler in a React-friendly API with state management, error handling, and abort support.
+
+### useUIStream Hook
+
+```tsx
+import { useUIStream } from '@json-render/react';
+
+function App() {
+  const {
+    spec,          // Current UI spec state
+    isStreaming,   // True while streaming
+    error,         // Any error that occurred
+    send,          // Function to start generation
+    clear,         // Function to reset spec and error
+  } = useUIStream({
+    api: '/api/generate',
+    onComplete: (spec) => {},  // Optional: called when streaming completes
+    onError: (error) => {},    // Optional: called when an error occurs
+  });
+}
+```
+
+### Progressive Rendering
+
+The Renderer automatically updates as the spec changes:
+
+```tsx
+function App() {
+  const { spec, isStreaming } = useUIStream({ api: '/api/generate' });
+
+  return (
+    <div>
+      {isStreaming && <LoadingIndicator />}
+      <Renderer spec={spec} registry={registry} loading={isStreaming} />
+    </div>
+  );
+}
+```
+
+### Aborting Streams
+
+Calling `send` again automatically aborts the previous request. Use `clear` to reset the spec and error state:
+
+```tsx
+function App() {
+  const { isStreaming, send, clear } = useUIStream({
+    api: '/api/generate',
+  });
+
+  return (
+    <div>
+      <button onClick={() => send('Create dashboard')}>
+        Generate
+      </button>
+      <button onClick={clear}>Reset</button>
+    </div>
+  );
+}
+```
+
+See the [@json-render/react API reference](/docs/api/react) for full `useUIStream` documentation.

apps/web/app/(main)/docs/streaming/page.tsx

@@ -1,133 +0,0 @@
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Streaming | json-render",
-};
-
-export default function StreamingPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Streaming</h1>
-      <p className="text-muted-foreground mb-8">
-        Progressively render UI as AI generates it.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">How Streaming Works</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        json-render uses JSONL (JSON Lines) streaming. As AI generates, each
-        line represents a patch operation:
-      </p>
-      <Code lang="json">{`{"op":"set","path":"/root","value":{"key":"root","type":"Card","props":{"title":"Dashboard"}}}
-{"op":"add","path":"/root/children","value":{"key":"metric-1","type":"Metric","props":{"label":"Revenue"}}}
-{"op":"add","path":"/root/children","value":{"key":"metric-2","type":"Metric","props":{"label":"Users"}}}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">useUIStream Hook</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        The hook handles parsing and state management:
-      </p>
-      <Code lang="tsx">{`import { useUIStream } from '@json-render/react';
-
-function App() {
-  const {
-    tree,        // Current UI tree state
-    isLoading,   // True while streaming
-    error,       // Any error that occurred
-    generate,    // Function to start generation
-    abort,       // Function to cancel streaming
-  } = useUIStream({
-    endpoint: '/api/generate',
-  });
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Patch Operations</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Supported operations:
-      </p>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-2 mb-4">
-        <li>
-          <code className="text-foreground">set</code> — Set the value at a path
-          (creates if needed)
-        </li>
-        <li>
-          <code className="text-foreground">add</code> — Add to an array at a
-          path
-        </li>
-        <li>
-          <code className="text-foreground">replace</code> — Replace value at a
-          path
-        </li>
-        <li>
-          <code className="text-foreground">remove</code> — Remove value at a
-          path
-        </li>
-      </ul>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Path Format</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Paths use a key-based format for elements:
-      </p>
-      <Code lang="bash">{`/root              -> Root element
-/root/children     -> Children of root
-/elements/card-1   -> Element with key "card-1"
-/elements/card-1/children -> Children of card-1`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Server-Side Setup</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Ensure your API route streams properly:
-      </p>
-      <Code lang="typescript">{`export async function POST(req: Request) {
-  const { prompt } = await req.json();
-  
-  const result = streamText({
-    model: 'anthropic/claude-haiku-4.5',
-    system: generateCatalogPrompt(catalog),
-    prompt,
-  });
-
-  // Return as a streaming response
-  return new Response(result.textStream, {
-    headers: {
-      'Content-Type': 'text/plain; charset=utf-8',
-      'Transfer-Encoding': 'chunked',
-      'Cache-Control': 'no-cache',
-    },
-  });
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Progressive Rendering
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        The Renderer automatically updates as the tree changes:
-      </p>
-      <Code lang="tsx">{`function App() {
-  const { tree, isLoading } = useUIStream({ endpoint: '/api/generate' });
-
-  return (
-    <div>
-      {isLoading && <LoadingIndicator />}
-      <Renderer tree={tree} registry={registry} />
-    </div>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Aborting Streams</h2>
-      <Code lang="tsx">{`function App() {
-  const { isLoading, generate, abort } = useUIStream({
-    endpoint: '/api/generate',
-  });
-
-  return (
-    <div>
-      <button onClick={() => generate('Create dashboard')}>
-        Generate
-      </button>
-      {isLoading && (
-        <button onClick={abort}>Cancel</button>
-      )}
-    </div>
-  );
-}`}</Code>
-    </article>
-  );
-}

apps/web/app/(main)/docs/validation/page.mdx

@@ -0,0 +1,155 @@
+export const metadata = { title: "Validation" }
+
+# Validation
+
+Validate form inputs with built-in and custom functions.
+
+## Built-in Validators
+
+json-render includes common validation functions:
+
+- `required` — Value must be non-empty
+- `email` — Valid email format
+- `minLength` — Minimum string length
+- `maxLength` — Maximum string length
+- `pattern` — Match a regex pattern
+- `min` — Minimum numeric value
+- `max` — Maximum numeric value
+
+## Using Validation in JSON
+
+Use `{ "$bindState": "/path" }` on the value prop for two-way binding. Validation checks run against the value at the bound path (available as `bindings?.value` in components):
+
+```json
+{
+  "type": "TextField",
+  "props": {
+    "label": "Email",
+    "value": { "$bindState": "/form/email" },
+    "checks": [
+      { "type": "required", "message": "Email is required" },
+      { "type": "email", "message": "Invalid email format" }
+    ],
+    "validateOn": "blur"
+  }
+}
+```
+
+## Validation with Parameters
+
+```json
+{
+  "type": "TextField",
+  "props": {
+    "label": "Password",
+    "value": { "$bindState": "/form/password" },
+    "checks": [
+      { "type": "required", "message": "Password is required" },
+      { 
+        "type": "minLength", 
+        "args": { "min": 8 },
+        "message": "Password must be at least 8 characters"
+      },
+      {
+        "type": "pattern",
+        "args": { "pattern": "[A-Z]" },
+        "message": "Must contain at least one uppercase letter"
+      }
+    ]
+  }
+}
+```
+
+## Custom Validation Functions
+
+Define custom validators in your catalog's `functions` field. The catalog itself is framework-agnostic — only the `schema` import varies by platform:
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/react'; // or '@json-render/react-native'
+import { z } from 'zod';
+
+const catalog = defineCatalog(schema, {
+  components: { /* ... */ },
+  functions: {
+    isValidPhone: {
+      description: 'Validates phone number format',
+    },
+    isUniqueEmail: {
+      description: 'Checks if email is not already registered',
+    },
+  },
+});
+```
+
+## Usage with React
+
+In `@json-render/react`, use `ValidationProvider` to supply implementations for your custom validators:
+
+```tsx
+import { ValidationProvider } from '@json-render/react';
+
+function App() {
+  const customValidators = {
+    isValidPhone: (value) => {
+      const phoneRegex = /^\+?[1-9]\d{1,14}$/;
+      return phoneRegex.test(value);
+    },
+    isUniqueEmail: async (value) => {
+      const response = await fetch(`/api/check-email?email=${value}`);
+      const { available } = await response.json();
+      return available;
+    },
+  };
+
+  return (
+    <ValidationProvider customFunctions={customValidators}>
+      {/* Your UI */}
+    </ValidationProvider>
+  );
+}
+```
+
+### Using in Components
+
+The `useFieldValidation` and `useBoundProp` hooks wire validation into your registry components. Validation uses the path from `bindings?.value` (the bound state path):
+
+```tsx
+import { useFieldValidation, useBoundProp } from '@json-render/react';
+
+function TextField({ props, bindings }) {
+  const [value, setValue] = useBoundProp(props.value, bindings?.value);
+  const { errors, isValid, validate, touch, clear } = useFieldValidation(
+    bindings?.value ?? null,
+    { checks: props.checks, validateOn: props.validateOn }
+  );
+
+  return (
+    <div>
+      <label>{props.label}</label>
+      <input
+        value={value || ''}
+        onChange={(e) => setValue(e.target.value)}
+        onBlur={() => validate()}
+      />
+      {errors.map((error, i) => (
+        <p key={i} className="text-red-500 text-sm">{error}</p>
+      ))}
+    </div>
+  );
+}
+```
+
+See the [@json-render/react API reference](/docs/api/react) for full `ValidationProvider` and `useFieldValidation` documentation.
+
+## Validation Timing
+
+Control when validation runs with `validateOn`:
+
+- `change` — Validate on every input change
+- `blur` — Validate when field loses focus
+- `submit` — Validate only on form submission
+
+## Next
+
+Learn about [generation modes](/docs/generation-modes).

apps/web/app/(main)/docs/validation/page.tsx

@@ -1,185 +0,0 @@
-import Link from "next/link";
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Validation | json-render",
-};
-
-export default function ValidationPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Validation</h1>
-      <p className="text-muted-foreground mb-8">
-        Validate form inputs with built-in and custom functions.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Built-in Validators</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        json-render includes common validation functions:
-      </p>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-1 mb-4">
-        <li>
-          <code className="text-foreground">required</code> — Value must be
-          non-empty
-        </li>
-        <li>
-          <code className="text-foreground">email</code> — Valid email format
-        </li>
-        <li>
-          <code className="text-foreground">minLength</code> — Minimum string
-          length
-        </li>
-        <li>
-          <code className="text-foreground">maxLength</code> — Maximum string
-          length
-        </li>
-        <li>
-          <code className="text-foreground">pattern</code> — Match a regex
-          pattern
-        </li>
-        <li>
-          <code className="text-foreground">min</code> — Minimum numeric value
-        </li>
-        <li>
-          <code className="text-foreground">max</code> — Maximum numeric value
-        </li>
-      </ul>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Using Validation in JSON
-      </h2>
-      <Code lang="json">{`{
-  "type": "TextField",
-  "props": {
-    "label": "Email",
-    "valuePath": "/form/email",
-    "checks": [
-      { "fn": "required", "message": "Email is required" },
-      { "fn": "email", "message": "Invalid email format" }
-    ],
-    "validateOn": "blur"
-  }
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Validation with Parameters
-      </h2>
-      <Code lang="json">{`{
-  "type": "TextField",
-  "props": {
-    "label": "Password",
-    "valuePath": "/form/password",
-    "checks": [
-      { "fn": "required", "message": "Password is required" },
-      { 
-        "fn": "minLength", 
-        "args": { "length": 8 },
-        "message": "Password must be at least 8 characters"
-      },
-      {
-        "fn": "pattern",
-        "args": { "pattern": "[A-Z]" },
-        "message": "Must contain at least one uppercase letter"
-      }
-    ]
-  }
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Custom Validation Functions
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Define custom validators in your catalog:
-      </p>
-      <Code lang="typescript">{`const catalog = createCatalog({
-  components: { /* ... */ },
-  validationFunctions: {
-    isValidPhone: {
-      description: 'Validates phone number format',
-    },
-    isUniqueEmail: {
-      description: 'Checks if email is not already registered',
-    },
-  },
-});`}</Code>
-
-      <p className="text-sm text-muted-foreground mb-4">
-        Then implement them in your ValidationProvider:
-      </p>
-      <Code lang="tsx">{`import { ValidationProvider } from '@json-render/react';
-
-function App() {
-  const customValidators = {
-    isValidPhone: (value) => {
-      const phoneRegex = /^\\+?[1-9]\\d{1,14}$/;
-      return phoneRegex.test(value);
-    },
-    isUniqueEmail: async (value) => {
-      const response = await fetch(\`/api/check-email?email=\${value}\`);
-      const { available } = await response.json();
-      return available;
-    },
-  };
-
-  return (
-    <ValidationProvider functions={customValidators}>
-      {/* Your UI */}
-    </ValidationProvider>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Using in Components</h2>
-      <Code lang="tsx">{`import { useFieldValidation } from '@json-render/react';
-
-function TextField({ element }) {
-  const { value, setValue, errors, validate } = useFieldValidation(
-    element.props.valuePath,
-    element.props.checks
-  );
-
-  return (
-    <div>
-      <label>{element.props.label}</label>
-      <input
-        value={value || ''}
-        onChange={(e) => setValue(e.target.value)}
-        onBlur={() => validate()}
-      />
-      {errors.map((error, i) => (
-        <p key={i} className="text-red-500 text-sm">{error}</p>
-      ))}
-    </div>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Validation Timing</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Control when validation runs with{" "}
-        <code className="text-foreground">validateOn</code>:
-      </p>
-      <ul className="list-disc list-inside text-sm text-muted-foreground space-y-1">
-        <li>
-          <code className="text-foreground">change</code> — Validate on every
-          input change
-        </li>
-        <li>
-          <code className="text-foreground">blur</code> — Validate when field
-          loses focus
-        </li>
-        <li>
-          <code className="text-foreground">submit</code> — Validate only on
-          form submission
-        </li>
-      </ul>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Next</h2>
-      <p className="text-sm text-muted-foreground">
-        Learn about{" "}
-        <Link href="/docs/ai-sdk" className="text-foreground hover:underline">
-          AI SDK integration
-        </Link>
-        .
-      </p>
-    </article>
-  );
-}

apps/web/app/(main)/docs/visibility/page.mdx

@@ -0,0 +1,338 @@
+export const metadata = { title: "Visibility" }
+
+# Visibility
+
+Conditionally show or hide components based on state values and logic.
+
+## State-Based Visibility
+
+Show/hide based on state values. Use `$state` with a JSON Pointer path:
+
+```json
+{
+  "type": "Alert",
+  "props": { "message": "Form has errors" },
+  "visible": { "$state": "/form/hasErrors" }
+}
+```
+
+Visible when `/form/hasErrors` is truthy.
+
+### Negation
+
+Use `not: true` to invert a condition:
+
+```json
+{
+  "type": "WelcomeBanner",
+  "visible": { "$state": "/user/hasSeenWelcome", "not": true }
+}
+```
+
+Visible when `/user/hasSeenWelcome` is falsy.
+
+## Auth-Based Visibility
+
+Show/hide based on authentication state. Expose your auth state in the state model (e.g. at `/auth/isSignedIn`):
+
+```json
+{
+  "type": "AdminPanel",
+  "visible": { "$state": "/auth/isSignedIn" }
+}
+```
+
+For signed-out only:
+
+```json
+{
+  "type": "LoginPrompt",
+  "visible": { "$state": "/auth/isSignedIn", "not": true }
+}
+```
+
+## Comparison Operators
+
+Compare a state value to a literal or another state path. Use **one operator per condition** -- if multiple are provided, only the first one is evaluated (precedence: `eq` > `neq` > `gt` > `gte` > `lt` > `lte`). Add `"not": true` to invert the result of any condition.
+
+```json
+// Equal
+{
+  "visible": { "$state": "/user/role", "eq": "admin" }
+}
+
+// Not equal
+{
+  "visible": { "$state": "/tab", "neq": "home" }
+}
+
+// Greater than
+{
+  "visible": { "$state": "/cart/total", "gt": 100 }
+}
+
+// Greater than or equal
+{
+  "visible": { "$state": "/cart/itemCount", "gte": 1 }
+}
+
+// Less than
+{
+  "visible": { "$state": "/cart/total", "lt": 1000 }
+}
+
+// Less than or equal
+{
+  "visible": { "$state": "/cart/itemCount", "lte": 10 }
+}
+```
+
+Comparison values can be literals or state references:
+
+```json
+{
+  "visible": { "$state": "/user/balance", "gte": { "$state": "/order/minimum" } }
+}
+```
+
+## Combining Conditions (AND)
+
+Place multiple conditions in an array for implicit AND:
+
+```json
+{
+  "type": "SubmitButton",
+  "visible": [
+    { "$state": "/form/isValid" },
+    { "$state": "/form/hasChanges" }
+  ]
+}
+```
+
+All conditions must be true for the element to be visible.
+
+## OR Conditions
+
+Use `$or` when at least one condition should be true:
+
+```json
+{
+  "type": "SpecialOffer",
+  "visible": { "$or": [
+    { "$state": "/user/isVIP" },
+    { "$state": "/cart/total", "gt": 200 }
+  ]}
+}
+```
+
+Visible when the user is VIP **or** the cart total exceeds 200. `$or` can contain any visibility conditions, including nested arrays (AND) and comparisons.
+
+## Explicit AND
+
+Use `$and` when you need to nest AND logic inside `$or`:
+
+```json
+{
+  "type": "PromoCard",
+  "visible": { "$or": [
+    { "$and": [
+      { "$state": "/user/isVIP" },
+      { "$state": "/cart/total", "gt": 50 }
+    ]},
+    { "$state": "/promo/active" }
+  ]}
+}
+```
+
+For top-level AND, the implicit array form is simpler: `[condition, condition]`. Use `$and` only when nesting inside `$or`.
+
+## Always / Never
+
+Use boolean literals for constant visibility:
+
+```json
+{
+  "type": "Footer",
+  "visible": true
+}
+```
+
+```json
+{
+  "type": "DeprecatedPanel",
+  "visible": false
+}
+```
+
+## Repeat-Scoped Conditions
+
+Inside a [repeat](/docs/data-binding#repeat), use `$item` and `$index` conditions to show/hide based on the current item:
+
+### `$item` — Condition on item field
+
+```json
+{
+  "type": "Badge",
+  "props": { "label": "Overdue" },
+  "visible": { "$item": "isOverdue" }
+}
+```
+
+With comparison:
+
+```json
+{
+  "type": "DiscountTag",
+  "visible": { "$item": "price", "gt": 100 }
+}
+```
+
+### `$index` — Condition on array index
+
+```json
+{
+  "type": "Divider",
+  "visible": { "$index": true, "gt": 0 }
+}
+```
+
+This shows the divider for every item except the first (index 0).
+
+`$item` and `$index` conditions support the same comparison operators as `$state` (`eq`, `neq`, `gt`, `gte`, `lt`, `lte`, `not`).
+
+## Complex Example
+
+```json
+{
+  "type": "RefundButton",
+  "props": { "label": "Process Refund" },
+  "visible": [
+    { "$state": "/auth/isSignedIn" },
+    { "$state": "/user/role", "eq": "support" },
+    { "$state": "/order/amount", "gt": 0 },
+    { "$state": "/order/isRefunded", "not": true }
+  ]
+}
+```
+
+## Quick Reference
+
+<div className="my-6 overflow-x-auto">
+  <table className="mdx-table w-full text-sm border-collapse">
+    <thead>
+      <tr>
+        <th>Condition</th>
+        <th>Syntax</th>
+      </tr>
+    </thead>
+    <tbody>
+      <tr>
+        <td>Truthiness</td>
+        <td><code>{'{ "$state": "/path" }'}</code></td>
+      </tr>
+      <tr>
+        <td>Falsy (not)</td>
+        <td><code>{'{ "$state": "/path", "not": true }'}</code></td>
+      </tr>
+      <tr>
+        <td>Equal</td>
+        <td><code>{'{ "$state": "/path", "eq": value }'}</code></td>
+      </tr>
+      <tr>
+        <td>Not equal</td>
+        <td><code>{'{ "$state": "/path", "neq": value }'}</code></td>
+      </tr>
+      <tr>
+        <td>Greater than</td>
+        <td><code>{'{ "$state": "/path", "gt": number }'}</code></td>
+      </tr>
+      <tr>
+        <td>Greater or equal</td>
+        <td><code>{'{ "$state": "/path", "gte": number }'}</code></td>
+      </tr>
+      <tr>
+        <td>Less than</td>
+        <td><code>{'{ "$state": "/path", "lt": number }'}</code></td>
+      </tr>
+      <tr>
+        <td>Less or equal</td>
+        <td><code>{'{ "$state": "/path", "lte": number }'}</code></td>
+      </tr>
+      <tr>
+        <td>Item field (repeat)</td>
+        <td><code>{'{ "$item": "field" }'}</code></td>
+      </tr>
+      <tr>
+        <td>Item comparison</td>
+        <td><code>{'{ "$item": "field", "eq": value }'}</code></td>
+      </tr>
+      <tr>
+        <td>Index (repeat)</td>
+        <td><code>{'{ "$index": true, "gt": 0 }'}</code></td>
+      </tr>
+      <tr>
+        <td>AND (implicit)</td>
+        <td><code>{"[ condition, condition ]"}</code></td>
+      </tr>
+      <tr>
+        <td>AND (explicit)</td>
+        <td><code>{'{ "$and": [ condition, condition ] }'}</code></td>
+      </tr>
+      <tr>
+        <td>OR</td>
+        <td><code>{'{ "$or": [ condition, condition ] }'}</code></td>
+      </tr>
+      <tr>
+        <td>Always</td>
+        <td><code>{"true"}</code></td>
+      </tr>
+      <tr>
+        <td>Never</td>
+        <td><code>{"false"}</code></td>
+      </tr>
+    </tbody>
+  </table>
+</div>
+
+Comparison values can be literals or state references for state-to-state comparisons:
+
+```json
+{ "$state": "/a", "eq": { "$state": "/b" } }
+```
+
+## Usage with React
+
+In `@json-render/react`, wrap your app with `VisibilityProvider` to enable conditional rendering. The `Renderer` handles visibility automatically — elements with unmet conditions are not rendered.
+
+```tsx
+import { VisibilityProvider, StateProvider } from '@json-render/react';
+
+function App() {
+  return (
+    <StateProvider initialState={data}>
+      <VisibilityProvider>
+        {/* Components can now use visibility conditions */}
+      </VisibilityProvider>
+    </StateProvider>
+  );
+}
+```
+
+For advanced use cases, the `useIsVisible` hook lets you evaluate visibility conditions programmatically:
+
+```tsx
+import { useIsVisible } from '@json-render/react';
+
+function ConditionalContent({ condition, children }) {
+  const isVisible = useIsVisible(condition);
+
+  if (!isVisible) return null;
+  return <div>{children}</div>;
+}
+```
+
+See the [@json-render/react API reference](/docs/api/react) for full details.
+
+## Next
+
+Learn about [form validation](/docs/validation).

apps/web/app/(main)/docs/visibility/page.tsx

@@ -1,147 +0,0 @@
-import Link from "next/link";
-import { Code } from "@/components/code";
-
-export const metadata = {
-  title: "Visibility | json-render",
-};
-
-export default function VisibilityPage() {
-  return (
-    <article>
-      <h1 className="text-3xl font-bold mb-4">Visibility</h1>
-      <p className="text-muted-foreground mb-8">
-        Conditionally show or hide components based on data, auth, or logic.
-      </p>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">VisibilityProvider</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Wrap your app with VisibilityProvider to enable conditional rendering:
-      </p>
-      <Code lang="tsx">{`import { VisibilityProvider } from '@json-render/react';
-
-function App() {
-  return (
-    <DataProvider initialData={data}>
-      <VisibilityProvider>
-        {/* Components can now use visibility conditions */}
-      </VisibilityProvider>
-    </DataProvider>
-  );
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Path-Based Visibility
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Show/hide based on data values:
-      </p>
-      <Code lang="json">{`{
-  "type": "Alert",
-  "props": { "message": "Form has errors" },
-  "visible": { "path": "/form/hasErrors" }
-}
-
-// Visible when /form/hasErrors is truthy`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">
-        Auth-Based Visibility
-      </h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Show/hide based on authentication state:
-      </p>
-      <Code lang="json">{`{
-  "type": "AdminPanel",
-  "visible": { "auth": "signedIn" }
-}
-
-// Options: "signedIn", "signedOut", "admin", etc.`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Logic Expressions</h2>
-      <p className="text-sm text-muted-foreground mb-4">
-        Combine conditions with logic operators:
-      </p>
-      <Code lang="json">{`// AND - all conditions must be true
-{
-  "type": "SubmitButton",
-  "visible": {
-    "and": [
-      { "path": "/form/isValid" },
-      { "path": "/form/hasChanges" }
-    ]
-  }
-}
-
-// OR - any condition must be true
-{
-  "type": "HelpText",
-  "visible": {
-    "or": [
-      { "path": "/user/isNew" },
-      { "path": "/settings/showHelp" }
-    ]
-  }
-}
-
-// NOT - invert a condition
-{
-  "type": "WelcomeBanner",
-  "visible": {
-    "not": { "path": "/user/hasSeenWelcome" }
-  }
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Comparison Operators</h2>
-      <Code lang="json">{`// Equal
-{
-  "visible": {
-    "eq": [{ "path": "/user/role" }, "admin"]
-  }
-}
-
-// Greater than
-{
-  "visible": {
-    "gt": [{ "path": "/cart/total" }, 100]
-  }
-}
-
-// Available: eq, ne, gt, gte, lt, lte`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Complex Example</h2>
-      <Code lang="json">{`{
-  "type": "RefundButton",
-  "props": { "label": "Process Refund" },
-  "visible": {
-    "and": [
-      { "auth": "signedIn" },
-      { "eq": [{ "path": "/user/role" }, "support"] },
-      { "gt": [{ "path": "/order/amount" }, 0] },
-      { "not": { "path": "/order/isRefunded" } }
-    ]
-  }
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Using in Components</h2>
-      <Code lang="tsx">{`import { useIsVisible } from '@json-render/react';
-
-function ConditionalContent({ element, children }) {
-  const isVisible = useIsVisible(element.visible);
-  
-  if (!isVisible) return null;
-  return <div>{children}</div>;
-}`}</Code>
-
-      <h2 className="text-xl font-semibold mt-12 mb-4">Next</h2>
-      <p className="text-sm text-muted-foreground">
-        Learn about{" "}
-        <Link
-          href="/docs/validation"
-          className="text-foreground hover:underline"
-        >
-          form validation
-        </Link>
-        .
-      </p>
-    </article>
-  );
-}

apps/web/app/(main)/layout.tsx

@@ -1,5 +1,4 @@
 import { Header } from "@/components/header";
-import { Footer } from "@/components/footer";
 
 export default function MainLayout({
   children,
@@ -10,7 +9,6 @@ export default function MainLayout({
     <div className="min-h-screen flex flex-col">
       <Header />
       <main className="flex-1">{children}</main>
-      <Footer />
     </div>
   );
 }

apps/web/app/(main)/page.tsx

@@ -9,12 +9,16 @@ export default function Home() {
     <>
       {/* Hero */}
       <section className="max-w-5xl mx-auto px-6 pt-24 pb-16 text-center">
-        <h1 className="text-5xl sm:text-6xl md:text-7xl font-bold tracking-tighter mb-6">
+        <p className="text-xs sm:text-sm font-medium text-muted-foreground tracking-widest uppercase mb-4">
+          The Generative UI Framework
+        </p>
+        <h1 className="text-4xl sm:text-6xl md:text-7xl font-bold tracking-tighter mb-6">
           AI → json-render → UI
         </h1>
         <p className="text-lg text-muted-foreground max-w-2xl mx-auto mb-12 leading-relaxed">
-          Define a component catalog. Users prompt. AI outputs JSON constrained
-          to your catalog. Your components render it.
+          Generate dynamic, personalized UIs from prompts without sacrificing
+          reliability. Predefined components and actions for safe, predictable
+          output.
         </p>
 
         <Demo />
@@ -65,10 +69,10 @@ export default function Home() {
               <div className="text-xs text-muted-foreground font-mono mb-3">
                 02
               </div>
-              <h3 className="text-lg font-semibold mb-2">Users Prompt</h3>
+              <h3 className="text-lg font-semibold mb-2">AI Generates</h3>
               <p className="text-sm text-muted-foreground leading-relaxed">
-                End users describe what they want. AI generates JSON constrained
-                to your catalog.
+                Describe what you want. AI generates JSON constrained to your
+                catalog. Every interface is unique.
               </p>
             </div>
             <div>
@@ -96,10 +100,12 @@ export default function Home() {
               <p className="text-muted-foreground mb-6">
                 Components, actions, and validation functions.
               </p>
-              <Code lang="typescript">{`import { createCatalog } from '@json-render/core';
+              <Code lang="typescript">{`import { defineSchema, defineCatalog } from '@json-render/core';
 import { z } from 'zod';
 
-export const catalog = createCatalog({
+const schema = defineSchema({ /* ... */ });
+
+export const catalog = defineCatalog(schema, {
   components: {
     Card: {
       props: z.object({
@@ -111,7 +117,7 @@ export const catalog = createCatalog({
     Metric: {
       props: z.object({
         label: z.string(),
-        valuePath: z.string(),
+        statePath: z.string(),
         format: z.enum(['currency', 'percent']),
       }),
     },
@@ -127,23 +133,24 @@ export const catalog = createCatalog({
                 Constrained output that your components render natively.
               </p>
               <Code lang="json">{`{
-  "key": "dashboard",
-  "type": "Card",
-  "props": {
-    "title": "Revenue Dashboard",
-    "description": null
-  },
-  "children": [
-    {
-      "key": "revenue",
+  "root": "dashboard",
+  "elements": {
+    "dashboard": {
+      "type": "Card",
+      "props": {
+        "title": "Revenue Dashboard"
+      },
+      "children": ["revenue"]
+    },
+    "revenue": {
       "type": "Metric",
       "props": {
         "label": "Total Revenue",
-        "valuePath": "/metrics/revenue",
+        "statePath": "/metrics/revenue",
         "format": "currency"
       }
     }
-  ]
+  }
 }`}</Code>
             </div>
           </div>
@@ -170,25 +177,22 @@ export const catalog = createCatalog({
   "root": "card",
   "elements": {
     "card": {
-      "key": "card",
       "type": "Card",
       "props": { "title": "Revenue" },
       "children": ["metric", "chart"]
     },
     "metric": {
-      "key": "metric",
       "type": "Metric",
       "props": {
         "label": "Total Revenue",
-        "valuePath": "analytics/revenue",
+        "statePath": "analytics/revenue",
         "format": "currency"
       }
     },
     "chart": {
-      "key": "chart",
       "type": "Chart",
       "props": {
-        "dataPath": "analytics/salesByRegion"
+        "statePath": "analytics/salesByRegion"
       }
     }
   }
@@ -221,10 +225,10 @@ export default function Page() {
       <Metric
         data={data}
         label="Total Revenue"
-        valuePath="analytics/revenue"
+        statePath="analytics/revenue"
         format="currency"
       />
-      <Chart data={data} dataPath="analytics/salesByRegion" />
+      <Chart data={data} statePath="analytics/salesByRegion" />
     </Card>
   );
 }`}</Code>
@@ -246,6 +250,10 @@ export default function Page() {
           <h2 className="text-2xl font-semibold mb-12 text-center">Features</h2>
           <div className="grid sm:grid-cols-2 lg:grid-cols-3 gap-8">
             {[
+              {
+                title: "Generative UI",
+                desc: "Generate dynamic, personalized interfaces from prompts with AI",
+              },
               {
                 title: "Guardrails",
                 desc: "AI can only use components you define in the catalog",
@@ -255,20 +263,16 @@ export default function Page() {
                 desc: "Progressive rendering as JSON streams from the model",
               },
               {
-                title: "Code Export",
-                desc: "Export as standalone React code with no runtime dependencies",
+                title: "React & React Native",
+                desc: "Render on web and mobile from the same catalog and spec format",
               },
               {
                 title: "Data Binding",
-                desc: "Two-way binding with JSON Pointer paths",
+                desc: "Connect props to state with $state, $item, $index, and two-way binding",
               },
               {
-                title: "Actions",
-                desc: "Named actions handled by your application",
-              },
-              {
-                title: "Visibility",
-                desc: "Conditional show/hide based on data or auth",
+                title: "Code Export",
+                desc: "Export as standalone React code with no runtime dependencies",
               },
             ].map((feature) => (
               <div key={feature.title}>

apps/web/app/api/docs-chat/route.ts

@@ -0,0 +1,130 @@
+import { readFile } from "fs/promises";
+import { join } from "path";
+import { convertToModelMessages, stepCountIs, streamText } from "ai";
+import type { ModelMessage, UIMessage } from "ai";
+import { createBashTool } from "bash-tool";
+import { headers } from "next/headers";
+import { allDocsPages } from "@/lib/docs-navigation";
+import { mdxToCleanMarkdown } from "@/lib/mdx-to-markdown";
+import { minuteRateLimit, dailyRateLimit } from "@/lib/rate-limit";
+
+export const maxDuration = 60;
+
+const DEFAULT_MODEL = "anthropic/claude-haiku-4.5";
+
+const SYSTEM_PROMPT = `You are a helpful documentation assistant for json-render, a library for AI-generated UI with guardrails.
+
+GitHub repository: https://github.com/vercel-labs/json-render
+Documentation: https://json-render.dev/docs
+npm packages: @json-render/core, @json-render/react, @json-render/remotion, @json-render/codegen
+
+You have access to the full json-render documentation via the bash and readFile tools. The docs are available as markdown files in the /workspace/docs/ directory.
+
+When answering questions:
+- Use the bash tool to list files (ls /workspace/docs/) or search for content (grep -r "keyword" /workspace/docs/)
+- Use the readFile tool to read specific documentation pages (e.g. readFile with path "/workspace/docs/index.md")
+- Do NOT use bash to write, create, modify, or delete files (no tee, cat >, sed -i, echo >, cp, mv, rm, mkdir, touch, etc.) — you are read-only
+- Always base your answers on the actual documentation content
+- Be concise and accurate
+- If the docs don't cover a topic, say so honestly
+- Do NOT include source references or file paths in your response
+- Do NOT use emojis in your responses`;
+
+async function loadDocsFiles(): Promise<Record<string, string>> {
+  const files: Record<string, string> = {};
+
+  const results = await Promise.allSettled(
+    allDocsPages.map(async (page) => {
+      const slug =
+        page.href === "/docs" ? "" : page.href.replace(/^\/docs\/?/, "");
+      const filePath = slug
+        ? join(
+            process.cwd(),
+            "app",
+            "(main)",
+            "docs",
+            ...slug.split("/"),
+            "page.mdx",
+          )
+        : join(process.cwd(), "app", "(main)", "docs", "page.mdx");
+
+      const raw = await readFile(filePath, "utf-8");
+      const md = mdxToCleanMarkdown(raw);
+      const fileName = slug ? `/docs/${slug}.md` : "/docs/index.md";
+      return { fileName, md };
+    }),
+  );
+
+  for (const result of results) {
+    if (result.status === "fulfilled") {
+      files[result.value.fileName] = result.value.md;
+    }
+  }
+
+  return files;
+}
+
+function addCacheControl(messages: ModelMessage[]): ModelMessage[] {
+  if (messages.length === 0) return messages;
+  return messages.map((message, index) => {
+    if (index === messages.length - 1) {
+      return {
+        ...message,
+        providerOptions: {
+          ...message.providerOptions,
+          anthropic: { cacheControl: { type: "ephemeral" } },
+        },
+      };
+    }
+    return message;
+  });
+}
+
+export async function POST(req: Request) {
+  const headersList = await headers();
+  const ip = headersList.get("x-forwarded-for")?.split(",")[0] ?? "anonymous";
+
+  const [minuteResult, dailyResult] = await Promise.all([
+    minuteRateLimit.limit(ip),
+    dailyRateLimit.limit(ip),
+  ]);
+
+  if (!minuteResult.success || !dailyResult.success) {
+    const isMinuteLimit = !minuteResult.success;
+    return new Response(
+      JSON.stringify({
+        error: "Rate limit exceeded",
+        message: isMinuteLimit
+          ? "Too many requests. Please wait a moment before trying again."
+          : "Daily limit reached. Please try again tomorrow.",
+      }),
+      {
+        status: 429,
+        headers: { "Content-Type": "application/json" },
+      },
+    );
+  }
+
+  const { messages }: { messages: UIMessage[] } = await req.json();
+
+  const docsFiles = await loadDocsFiles();
+  const {
+    tools: { bash, readFile },
+  } = await createBashTool({ files: docsFiles });
+
+  const result = streamText({
+    model: DEFAULT_MODEL,
+    system: SYSTEM_PROMPT,
+    messages: await convertToModelMessages(messages),
+    stopWhen: stepCountIs(5),
+    tools: {
+      bash,
+      readFile,
+    },
+    prepareStep: ({ messages: stepMessages }) => ({
+      messages: addCacheControl(stepMessages),
+    }),
+  });
+
+  return result.toUIMessageStreamResponse();
+}

apps/web/app/api/docs-markdown/route.ts

@@ -0,0 +1,55 @@
+import { readFile } from "fs/promises";
+import { join } from "path";
+import { NextRequest, NextResponse } from "next/server";
+import { mdxToCleanMarkdown } from "@/lib/mdx-to-markdown";
+
+export async function GET(req: NextRequest) {
+  const { searchParams } = new URL(req.url);
+  const docPath = searchParams.get("path");
+
+  if (!docPath) {
+    return NextResponse.json(
+      { error: "Missing ?path= parameter" },
+      { status: 400 },
+    );
+  }
+
+  // Sanitize path: only allow docs paths, no traversal
+  const normalized = docPath
+    .replace(/^\//, "")
+    .replace(/\.\./g, "")
+    .replace(/[^a-zA-Z0-9/-]/g, "");
+
+  if (!normalized.startsWith("docs")) {
+    return NextResponse.json({ error: "Invalid path" }, { status: 400 });
+  }
+
+  // Map URL path to file path
+  // /docs -> /app/(main)/docs/page.mdx
+  // /docs/installation -> /app/(main)/docs/installation/page.mdx
+  const slug = normalized === "docs" ? "" : normalized.replace(/^docs\/?/, "");
+  const filePath = slug
+    ? join(
+        process.cwd(),
+        "app",
+        "(main)",
+        "docs",
+        ...slug.split("/"),
+        "page.mdx",
+      )
+    : join(process.cwd(), "app", "(main)", "docs", "page.mdx");
+
+  try {
+    const raw = await readFile(filePath, "utf-8");
+    const markdown = mdxToCleanMarkdown(raw);
+
+    return new NextResponse(markdown, {
+      headers: {
+        "Content-Type": "text/markdown; charset=utf-8",
+        "Cache-Control": "public, max-age=3600",
+      },
+    });
+  } catch {
+    return NextResponse.json({ error: "Page not found" }, { status: 404 });
+  }
+}

apps/web/app/api/generate/route.ts

@@ -1,112 +1,61 @@
 import { streamText } from "ai";
+import { headers } from "next/headers";
+import { buildUserPrompt } from "@json-render/core";
+import { minuteRateLimit, dailyRateLimit } from "@/lib/rate-limit";
+import { playgroundCatalog } from "@/lib/render/catalog";
 
 export const maxDuration = 30;
 
-const SYSTEM_PROMPT = `You are a UI generator that outputs JSONL (JSON Lines) patches.
-
-AVAILABLE COMPONENTS (22):
-
-Layout:
-- Card: { title?: string, description?: string, maxWidth?: "sm"|"md"|"lg"|"full", centered?: boolean } - Container card for content sections. Has children. Use for forms/content boxes, NOT for page headers.
-- Stack: { direction?: "horizontal"|"vertical", gap?: "sm"|"md"|"lg" } - Flex container. Has children.
-- Grid: { columns?: 2|3|4, gap?: "sm"|"md"|"lg" } - Grid layout. Has children. ALWAYS use mobile-first: set columns:1 and use className for larger screens.
-- Divider: {} - Horizontal separator line
-
-Form Inputs:
-- Input: { label: string, name: string, type?: "text"|"email"|"password"|"number", placeholder?: string } - Text input
-- Textarea: { label: string, name: string, placeholder?: string, rows?: number } - Multi-line text
-- Select: { label: string, name: string, options: string[], placeholder?: string } - Dropdown select
-- Checkbox: { label: string, name: string, checked?: boolean } - Checkbox input
-- Radio: { label: string, name: string, options: string[] } - Radio button group
-- Switch: { label: string, name: string, checked?: boolean } - Toggle switch
-
-Actions:
-- Button: { label: string, variant?: "primary"|"secondary"|"danger", actionText?: string } - Clickable button. actionText is shown in toast on click (defaults to label)
-- Link: { label: string, href: string } - Anchor link
-
-Typography:
-- Heading: { text: string, level?: 1|2|3|4 } - Heading text (h1-h4)
-- Text: { content: string, variant?: "body"|"caption"|"muted" } - Paragraph text
-
-Data Display:
-- Image: { src: string, alt: string, width?: number, height?: number } - Image
-- Avatar: { src?: string, name: string, size?: "sm"|"md"|"lg" } - User avatar with fallback initials
-- Badge: { text: string, variant?: "default"|"success"|"warning"|"danger" } - Status badge
-- Alert: { title: string, message?: string, type?: "info"|"success"|"warning"|"error" } - Alert banner
-- Progress: { value: number, max?: number, label?: string } - Progress bar (value 0-100)
-- Rating: { value: number, max?: number, label?: string } - Star rating display
-
-Charts:
-- BarGraph: { title?: string, data: Array<{label: string, value: number}> } - Vertical bar chart
-- LineGraph: { title?: string, data: Array<{label: string, value: number}> } - Line chart with points
-
-OUTPUT FORMAT (JSONL):
-{"op":"set","path":"/root","value":"element-key"}
-{"op":"add","path":"/elements/key","value":{"key":"...","type":"...","props":{...},"children":[...]}}
-
-ALL COMPONENTS support: className?: string[] - array of Tailwind classes for custom styling
-
-RULES:
-1. First line sets /root to root element key
-2. Add elements with /elements/{key}
-3. Children array contains string keys, not objects
-4. Parent first, then children
-5. Each element needs: key, type, props
-6. Use className for custom Tailwind styling when needed
-
-FORBIDDEN CLASSES (NEVER USE):
-- min-h-screen, h-screen, min-h-full, h-full, min-h-dvh, h-dvh - viewport heights break the small render container
-- bg-gray-50, bg-slate-50 or any page background colors - container already has background
-
-MOBILE-FIRST RESPONSIVE:
-- ALWAYS design mobile-first. Single column on mobile, expand on larger screens.
-- Grid: Use columns:1 prop, add className:["sm:grid-cols-2"] or ["md:grid-cols-3"] for larger screens
-- DO NOT put page headers/titles inside Card - use Stack with Heading directly
-- Horizontal stacks that may overflow should use className:["flex-wrap"]
-- For forms (login, signup, contact): Card should be the root element, NOT wrapped in a centering Stack
-
-EXAMPLE (Blog with responsive grid):
-{"op":"set","path":"/root","value":"page"}
-{"op":"add","path":"/elements/page","value":{"key":"page","type":"Stack","props":{"direction":"vertical","gap":"lg"},"children":["header","posts"]}}
-{"op":"add","path":"/elements/header","value":{"key":"header","type":"Stack","props":{"direction":"vertical","gap":"sm"},"children":["title","desc"]}}
-{"op":"add","path":"/elements/title","value":{"key":"title","type":"Heading","props":{"text":"My Blog","level":1}}}
-{"op":"add","path":"/elements/desc","value":{"key":"desc","type":"Text","props":{"content":"Latest posts","variant":"muted"}}}
-{"op":"add","path":"/elements/posts","value":{"key":"posts","type":"Grid","props":{"columns":1,"gap":"md","className":["sm:grid-cols-2","lg:grid-cols-3"]},"children":["post1"]}}
-{"op":"add","path":"/elements/post1","value":{"key":"post1","type":"Card","props":{"title":"Post Title"},"children":["excerpt"]}}
-{"op":"add","path":"/elements/excerpt","value":{"key":"excerpt","type":"Text","props":{"content":"Post content...","variant":"body"}}}
-
-Generate JSONL:`;
+const SYSTEM_PROMPT = playgroundCatalog.prompt({
+  customRules: [
+    "NEVER use viewport height classes (min-h-screen, h-screen) - the UI renders inside a fixed-size container.",
+    "NEVER use page background colors (bg-gray-50) - the container has its own background.",
+    "For forms or small UIs: use Card as root with maxWidth:'sm' or 'md' and centered:true.",
+    "For content-heavy UIs (blogs, dashboards, product listings): use Stack or Grid as root. Use Grid with 2-3 columns for card layouts.",
+    "Wrap each repeated item in a Card for visual separation and structure.",
+    "Use realistic, professional sample data. Include 3-5 items with varied content. Never leave state arrays empty.",
+    'For form inputs (Input, Textarea, Select), always include checks for validation (e.g. required, email, minLength). Always pair checks with a $bindState expression on the value prop (e.g. { "$bindState": "/path" }).',
+  ],
+});
 
 const MAX_PROMPT_LENGTH = 500;
 const DEFAULT_MODEL = "anthropic/claude-haiku-4.5";
 
 export async function POST(req: Request) {
-  const { prompt, context } = await req.json();
-  const previousTree = context?.previousTree;
+  // Get client IP for rate limiting
+  const headersList = await headers();
+  const ip = headersList.get("x-forwarded-for")?.split(",")[0] ?? "anonymous";
 
-  const sanitizedPrompt = String(prompt || "").slice(0, MAX_PROMPT_LENGTH);
+  // Check rate limits (minute and daily)
+  const [minuteResult, dailyResult] = await Promise.all([
+    minuteRateLimit.limit(ip),
+    dailyRateLimit.limit(ip),
+  ]);
 
-  // Build the user prompt, including previous tree for iteration
-  let userPrompt = sanitizedPrompt;
-  if (
-    previousTree &&
-    previousTree.root &&
-    Object.keys(previousTree.elements || {}).length > 0
-  ) {
-    userPrompt = `CURRENT UI STATE (already loaded, DO NOT recreate existing elements):
-${JSON.stringify(previousTree, null, 2)}
-
-USER REQUEST: ${sanitizedPrompt}
-
-IMPORTANT: The current UI is already loaded. Output ONLY the patches needed to make the requested change:
-- To add a new element: {"op":"add","path":"/elements/new-key","value":{...}}
-- To modify an existing element: {"op":"set","path":"/elements/existing-key","value":{...}}
-- To update the root: {"op":"set","path":"/root","value":"new-root-key"}
-- To add children: update the parent element with new children array
-
-DO NOT output patches for elements that don't need to change. Only output what's necessary for the requested modification.`;
+  if (!minuteResult.success || !dailyResult.success) {
+    const isMinuteLimit = !minuteResult.success;
+    return new Response(
+      JSON.stringify({
+        error: "Rate limit exceeded",
+        message: isMinuteLimit
+          ? "Too many requests. Please wait a moment before trying again."
+          : "Daily limit reached. Please try again tomorrow.",
+      }),
+      {
+        status: 429,
+        headers: { "Content-Type": "application/json" },
+      },
+    );
   }
 
+  const { prompt, context } = await req.json();
+
+  const userPrompt = buildUserPrompt({
+    prompt,
+    currentSpec: context?.previousSpec,
+    maxPromptLength: MAX_PROMPT_LENGTH,
+  });
+
   const result = streamText({
     model: process.env.AI_GATEWAY_MODEL || DEFAULT_MODEL,
     system: SYSTEM_PROMPT,
@@ -114,5 +63,33 @@ DO NOT output patches for elements that don't need to change. Only output what's
     temperature: 0.7,
   });
 
-  return result.toTextStreamResponse();
+  // Stream the text, then append token usage metadata at the end
+  const encoder = new TextEncoder();
+  const textStream = result.textStream;
+
+  const stream = new ReadableStream({
+    async start(controller) {
+      for await (const chunk of textStream) {
+        controller.enqueue(encoder.encode(chunk));
+      }
+      // Append usage metadata after stream completes
+      try {
+        const usage = await result.usage;
+        const meta = JSON.stringify({
+          __meta: "usage",
+          promptTokens: usage.inputTokens,
+          completionTokens: usage.outputTokens,
+          totalTokens: usage.totalTokens,
+        });
+        controller.enqueue(encoder.encode(`\n${meta}\n`));
+      } catch {
+        // Usage not available — skip silently
+      }
+      controller.close();
+    },
+  });
+
+  return new Response(stream, {
+    headers: { "Content-Type": "text/plain; charset=utf-8" },
+  });
 }

apps/web/app/globals.css

@@ -1,6 +1,8 @@
 @import "tailwindcss";
 @import "tw-animate-css";
 
+@source "../node_modules/streamdown/dist/index.js";
+
 @custom-variant dark (&:is(.dark *));
 
 :root {
@@ -26,6 +28,7 @@
   --border: oklch(0.85 0 0);
   --input: oklch(0.85 0 0);
   --ring: oklch(0.6 0 0);
+  --chat-bg: oklch(0.95 0 0);
 }
 
 .dark {
@@ -50,6 +53,7 @@
   --border: oklch(0.25 0 0);
   --input: oklch(0.25 0 0);
   --ring: oklch(0.4 0 0);
+  --chat-bg: oklch(0.25 0 0);
 }
 
 @theme inline {
@@ -107,29 +111,66 @@
     @apply bg-transparent p-0;
   }
 
-  /* Custom scrollbar */
-  ::-webkit-scrollbar {
-    width: 8px;
-    height: 8px;
+  /* Hide page scrollbar */
+  html {
+    scrollbar-width: none;
   }
 
-  ::-webkit-scrollbar-track {
-    @apply bg-background;
+  html::-webkit-scrollbar {
+    display: none;
   }
 
-  ::-webkit-scrollbar-thumb {
-    @apply bg-border rounded;
-  }
-
-  ::-webkit-scrollbar-thumb:hover {
-    @apply bg-muted-foreground;
-  }
 }
 
 button {
   cursor: pointer;
 }
 
+/* Tool call shimmer animation */
+@keyframes tool-shimmer {
+  0% { opacity: 0.5; }
+  50% { opacity: 1; }
+  100% { opacity: 0.5; }
+}
+
+.animate-tool-shimmer {
+  animation: tool-shimmer 1.5s ease-in-out infinite;
+}
+
+/* Fix list rendering in chat content */
+.docs-chat-content ul,
+.docs-chat-content ol {
+  list-style-position: outside;
+  padding-left: 1.25em;
+}
+
+.docs-chat-content li > p {
+  display: inline;
+  margin: 0;
+}
+
+.docs-chat-content li {
+  margin-top: 0.5em;
+  margin-bottom: 0.5em;
+}
+
+/* MDX table styles — fallback for GFM-generated tables */
+.mdx-table th,
+.mdx-table td {
+  border: 1px solid var(--border);
+  padding: 0.75rem 1rem;
+  text-align: left;
+}
+
+.mdx-table th {
+  font-weight: 600;
+  background-color: var(--muted);
+}
+
+.mdx-table td {
+  color: var(--muted-foreground);
+}
+
 /* Shiki dual theme support */
 .shiki,
 .shiki span {
@@ -142,3 +183,4 @@ button {
   color: var(--shiki-dark) !important;
   background-color: var(--shiki-dark-bg) !important;
 }
+

apps/web/app/layout.tsx

@@ -2,8 +2,11 @@ import type { Metadata } from "next";
 import localFont from "next/font/local";
 import "./globals.css";
 import { ThemeProvider } from "@/components/theme-provider";
+import { DocsChat } from "@/components/docs-chat";
 import { Analytics } from "@vercel/analytics/next";
 import { SpeedInsights } from "@vercel/speed-insights/next";
+import { PAGE_TITLES } from "@/lib/page-titles";
+import { cookies } from "next/headers";
 
 const geistSans = localFont({
   src: "./fonts/GeistVF.woff",
@@ -17,15 +20,18 @@ const geistMono = localFont({
 export const metadata: Metadata = {
   metadataBase: new URL("https://json-render.dev"),
   title: {
-    default: "json-render | AI-generated UI with guardrails",
+    default: `json-render | ${PAGE_TITLES[""]}`,
     template: "%s | json-render",
   },
   description:
-    "Let users generate dashboards, widgets, apps, and data visualizations from prompts — safely constrained to components you define.",
+    "The Generative UI framework. Generate dashboards, widgets, and apps from prompts — safely constrained to components you define.",
   keywords: [
     "json-render",
+    "generative UI",
     "AI UI generation",
+    "user-generated interfaces",
     "React components",
+    "React Native",
     "guardrails",
     "structured output",
     "dashboard builder",
@@ -37,23 +43,23 @@ export const metadata: Metadata = {
     locale: "en_US",
     url: "https://json-render.dev",
     siteName: "json-render",
-    title: "json-render | AI-generated UI with guardrails",
+    title: "json-render | The Generative UI Framework",
     description:
-      "Let users generate dashboards, widgets, apps, and data visualizations from prompts — safely constrained to components you define.",
+      "The Generative UI framework. Generate dashboards, widgets, and apps from prompts — safely constrained to components you define.",
     images: [
       {
         url: "/og",
         width: 1200,
         height: 630,
-        alt: "json-render - AI-generated UI with guardrails",
+        alt: "json-render - The Generative UI Framework",
       },
     ],
   },
   twitter: {
     card: "summary_large_image",
-    title: "json-render | AI-generated UI with guardrails",
+    title: "json-render | The Generative UI Framework",
     description:
-      "Let users generate dashboards, widgets, apps, and data visualizations from prompts — safely constrained to components you define.",
+      "The Generative UI framework. Generate dashboards, widgets, and apps from prompts — safely constrained to components you define.",
     images: ["/og"],
     creator: "@verabornnot",
   },
@@ -66,15 +72,31 @@ export const metadata: Metadata = {
   },
 };
 
-export default function RootLayout({
+export default async function RootLayout({
   children,
 }: Readonly<{
   children: React.ReactNode;
 }>) {
+  const cookieStore = await cookies();
+  const chatOpen = cookieStore.get("docs-chat-open")?.value === "true";
+  const chatWidth = Number(cookieStore.get("docs-chat-width")?.value) || 400;
+
   return (
     <html lang="en" suppressHydrationWarning>
+      <head>
+        {chatOpen && (
+          <style
+            dangerouslySetInnerHTML={{
+              __html: `@media(min-width:640px){body{padding-right:${chatWidth}px}}`,
+            }}
+          />
+        )}
+      </head>
       <body className={`${geistSans.variable} ${geistMono.variable}`}>
-        <ThemeProvider>{children}</ThemeProvider>
+        <ThemeProvider>
+          {children}
+          <DocsChat defaultOpen={chatOpen} defaultWidth={chatWidth} />
+        </ThemeProvider>
         <Analytics />
         <SpeedInsights />
       </body>

apps/web/app/not-found.tsx

@@ -0,0 +1,22 @@
+import Link from "next/link";
+import { Header } from "@/components/header";
+
+export default function NotFound() {
+  return (
+    <div className="flex min-h-screen flex-col">
+      <Header />
+      <main className="flex flex-1 flex-col items-center justify-center gap-4 px-4 text-center">
+        <h1 className="text-6xl font-bold tracking-tight">404</h1>
+        <p className="text-lg text-muted-foreground">
+          This page could not be found.
+        </p>
+        <Link
+          href="/"
+          className="mt-2 inline-flex items-center rounded-md bg-primary px-4 py-2 text-sm font-medium text-primary-foreground hover:bg-primary/90 transition-colors"
+        >
+          Go home
+        </Link>
+      </main>
+    </div>
+  );
+}

apps/web/app/og/[...slug]/route.tsx

@@ -0,0 +1,16 @@
+import { NextResponse } from "next/server";
+import { getPageTitle, renderOgImage } from "../og-image";
+
+export async function GET(
+  _request: Request,
+  { params }: { params: Promise<{ slug: string[] }> },
+) {
+  const { slug } = await params;
+  const title = getPageTitle(slug.join("/"));
+
+  if (!title) {
+    return NextResponse.json({ error: "Not found" }, { status: 404 });
+  }
+
+  return renderOgImage(title);
+}

apps/web/app/og/og-image.tsx

@@ -0,0 +1,105 @@
+import { ImageResponse } from "next/og";
+import { readFile } from "node:fs/promises";
+import { join } from "node:path";
+
+export { getPageTitle } from "@/lib/page-titles";
+
+// Cache font data in memory after first load
+let fontCache: { geistRegular: Buffer } | null = null;
+
+async function loadFonts() {
+  if (fontCache) return fontCache;
+  const geistRegular = await readFile(
+    join(process.cwd(), "public/Geist-Regular.ttf"),
+  );
+  fontCache = { geistRegular };
+  return fontCache;
+}
+
+export async function renderOgImage(title: string) {
+  const { geistRegular } = await loadFonts();
+
+  return new ImageResponse(
+    <div
+      style={{
+        width: "100%",
+        height: "100%",
+        display: "flex",
+        flexDirection: "column",
+        backgroundColor: "black",
+        padding: "60px 80px",
+      }}
+    >
+      <div
+        style={{
+          display: "flex",
+          alignItems: "center",
+          gap: "16px",
+        }}
+      >
+        <svg width="36" height="36" viewBox="0 0 16 16" fill="white">
+          <path fillRule="evenodd" clipRule="evenodd" d="M8 1L16 15H0L8 1Z" />
+        </svg>
+        <span
+          style={{
+            fontSize: 36,
+            color: "#666",
+            fontFamily: "Geist",
+            fontWeight: 400,
+          }}
+        >
+          /
+        </span>
+        <span
+          style={{
+            fontSize: 36,
+            fontFamily: "Geist",
+            fontWeight: 400,
+            color: "white",
+          }}
+        >
+          json-render
+        </span>
+      </div>
+
+      <div
+        style={{
+          display: "flex",
+          flex: 1,
+          flexDirection: "column",
+          alignItems: "center",
+          justifyContent: "center",
+        }}
+      >
+        {title.split("\n").map((line, i) => (
+          <span
+            key={i}
+            style={{
+              fontSize: 72,
+              fontFamily: "Geist",
+              fontWeight: 400,
+              color: "white",
+              letterSpacing: "-0.02em",
+              textAlign: "center",
+              lineHeight: 1.2,
+            }}
+          >
+            {line}
+          </span>
+        ))}
+      </div>
+    </div>,
+    {
+      width: 1200,
+      height: 630,
+      fonts: [
+        {
+          name: "Geist",
+          data: geistRegular.buffer as ArrayBuffer,
+          style: "normal",
+          weight: 400,
+        },
+      ],
+    },
+  );
+}

apps/web/app/og/route.tsx

@@ -1,44 +1,6 @@
-import { ImageResponse } from "next/og";
+import { getPageTitle, renderOgImage } from "./og-image";
 
-export async function GET(request: Request) {
-  const geist = await fetch(new URL("/Geist-Regular.ttf", request.url)).then(
-    (res) => res.arrayBuffer(),
-  );
-
-  return new ImageResponse(
-    <div
-      style={{
-        width: "100%",
-        height: "100%",
-        display: "flex",
-        alignItems: "center",
-        justifyContent: "center",
-        backgroundColor: "black",
-      }}
-    >
-      <span
-        style={{
-          fontSize: 144,
-          fontFamily: "Geist",
-          fontWeight: 400,
-          color: "white",
-          letterSpacing: "-0.02em",
-        }}
-      >
-        json-render
-      </span>
-    </div>,
-    {
-      width: 1200,
-      height: 630,
-      fonts: [
-        {
-          name: "Geist",
-          data: geist,
-          style: "normal",
-          weight: 400,
-        },
-      ],
-    },
-  );
+export async function GET() {
+  const title = getPageTitle("")!;
+  return renderOgImage(title);
 }

apps/web/app/playground/layout.tsx

@@ -3,7 +3,5 @@ export default function PlaygroundLayout({
 }: {
   children: React.ReactNode;
 }) {
-  return (
-    <div className="h-screen flex flex-col overflow-hidden">{children}</div>
-  );
+  return <div className="h-dvh flex flex-col overflow-hidden">{children}</div>;
 }

apps/web/app/playground/page.tsx

@@ -1,7 +1,9 @@
 import { Playground } from "@/components/playground";
 
+import { PAGE_TITLES } from "@/lib/page-titles";
+
 export const metadata = {
-  title: "Playground | json-render",
+  title: PAGE_TITLES["playground"],
 };
 
 export default function PlaygroundPage() {

apps/web/components/code.tsx

@@ -1,5 +1,6 @@
 import { codeToHtml } from "shiki";
 import { CopyButton } from "./copy-button";
+import { ExpandableCode } from "./expandable-code";
 
 const vercelDarkTheme = {
   name: "vercel-dark",
@@ -158,10 +159,12 @@ export async function Code({ children, lang = "typescript" }: CodeProps) {
           className="opacity-0 group-hover:opacity-100 text-neutral-500 dark:text-neutral-400 bg-neutral-100 dark:bg-[#0a0a0a]"
         />
       </div>
-      <div
-        className="overflow-x-auto [&_pre]:bg-transparent! [&_pre]:m-0! [&_pre]:p-4! [&_code]:bg-transparent! [&_.shiki]:bg-transparent!"
-        dangerouslySetInnerHTML={{ __html: html }}
-      />
+      <ExpandableCode>
+        <div
+          className="overflow-x-auto [&_pre]:bg-transparent! [&_pre]:m-0! [&_pre]:p-4! [&_code]:bg-transparent! [&_.shiki]:bg-transparent!"
+          dangerouslySetInnerHTML={{ __html: html }}
+        />
+      </ExpandableCode>
     </div>
   );
 }

apps/web/components/copy-page-button.tsx

@@ -0,0 +1,71 @@
+"use client";
+
+import { useState } from "react";
+import { usePathname } from "next/navigation";
+
+export function CopyPageButton() {
+  const pathname = usePathname();
+  const [state, setState] = useState<"idle" | "loading" | "copied">("idle");
+
+  const handleCopy = async () => {
+    setState("loading");
+    try {
+      const response = await fetch(
+        `/api/docs-markdown?path=${encodeURIComponent(pathname)}`,
+      );
+      if (!response.ok) {
+        throw new Error("Failed to fetch markdown");
+      }
+      const markdown = await response.text();
+      await navigator.clipboard.writeText(markdown);
+      setState("copied");
+      setTimeout(() => setState("idle"), 2000);
+    } catch {
+      setState("idle");
+    }
+  };
+
+  return (
+    <button
+      onClick={handleCopy}
+      disabled={state === "loading"}
+      className="flex items-center gap-1.5 px-2.5 py-1.5 text-xs text-muted-foreground hover:text-foreground border border-border rounded-md hover:bg-muted transition-colors disabled:opacity-50"
+      aria-label="Copy page as Markdown"
+    >
+      {state === "copied" ? (
+        <>
+          <svg
+            width="14"
+            height="14"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            strokeWidth="2"
+            strokeLinecap="round"
+            strokeLinejoin="round"
+          >
+            <polyline points="20 6 9 17 4 12" />
+          </svg>
+          Copied
+        </>
+      ) : (
+        <>
+          <svg
+            width="14"
+            height="14"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            strokeWidth="2"
+            strokeLinecap="round"
+            strokeLinejoin="round"
+          >
+            <rect x="9" y="9" width="13" height="13" rx="2" ry="2" />
+            <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1" />
+          </svg>
+          Copy Page
+        </>
+      )}
+    </button>
+  );
+}

apps/web/components/demo.tsx

@@ -7,156 +7,157 @@ import React, {
   useRef,
   useMemo,
 } from "react";
-import { Renderer, useUIStream, JSONUIProvider } from "@json-render/react";
-import type { UITree } from "@json-render/core";
+import { useUIStream } from "@json-render/react";
+import type { Spec } from "@json-render/core";
 import { collectUsedComponents, serializeProps } from "@json-render/codegen";
 import { toast } from "sonner";
 import { CodeBlock } from "./code-block";
 import { CopyButton } from "./copy-button";
 import { Toaster } from "./ui/sonner";
-import {
-  demoRegistry,
-  fallbackComponent,
-  useInteractiveState,
-} from "./demo/index";
+import { PlaygroundRenderer } from "@/lib/render/renderer";
+import { playgroundCatalog } from "@/lib/render/catalog";
+import { buildCatalogDisplayData } from "@/lib/render/catalog-display";
 
 const SIMULATION_PROMPT = "Create a contact form with name, email, and message";
 
 interface SimulationStage {
-  tree: UITree;
+  tree: Spec;
   stream: string;
 }
 
+// Shared state & element definitions for the progressive simulation stages.
+const FORM_STATE = { form: { name: "", email: "", message: "" } };
+
+const NAME_INPUT = {
+  type: "Input",
+  props: {
+    label: "Name",
+    name: "name",
+    statePath: "/form/name",
+    checks: [{ type: "required", message: "Name is required" }],
+  },
+} as const;
+
+const EMAIL_INPUT = {
+  type: "Input",
+  props: {
+    label: "Email",
+    name: "email",
+    type: "email",
+    statePath: "/form/email",
+    checks: [
+      { type: "required", message: "Email is required" },
+      { type: "email", message: "Please enter a valid email" },
+    ],
+  },
+} as const;
+
+const MESSAGE_INPUT = {
+  type: "Textarea",
+  props: {
+    label: "Message",
+    name: "message",
+    statePath: "/form/message",
+    checks: [{ type: "required", message: "Message is required" }],
+  },
+} as const;
+
+const SUBMIT_BUTTON = {
+  type: "Button",
+  props: { label: "Send Message", variant: "primary" },
+  on: { press: { action: "formSubmit" } },
+} as const;
+
 const SIMULATION_STAGES: SimulationStage[] = [
   {
     tree: {
       root: "card",
+      state: FORM_STATE,
       elements: {
         card: {
-          key: "card",
           type: "Card",
           props: { title: "Contact Us", maxWidth: "md" },
           children: [],
         },
       },
     },
-    stream: '{"op":"set","path":"/root","value":"card"}',
+    stream: '{"op":"add","path":"/root","value":"card"}',
   },
   {
     tree: {
       root: "card",
+      state: FORM_STATE,
       elements: {
         card: {
-          key: "card",
           type: "Card",
           props: { title: "Contact Us", maxWidth: "md" },
           children: ["name"],
         },
-        name: {
-          key: "name",
-          type: "Input",
-          props: { label: "Name", name: "name" },
-        },
+        name: NAME_INPUT,
       },
     },
     stream:
-      '{"op":"add","path":"/elements/card","value":{"key":"card","type":"Card","props":{"title":"Contact Us","maxWidth":"md"},"children":["name"]}}',
+      '{"op":"add","path":"/elements/name","value":{"type":"Input","props":{"label":"Name","name":"name","statePath":"/form/name","checks":[{"type":"required","message":"Name is required"}]}}}',
   },
   {
     tree: {
       root: "card",
+      state: FORM_STATE,
       elements: {
         card: {
-          key: "card",
           type: "Card",
           props: { title: "Contact Us", maxWidth: "md" },
           children: ["name", "email"],
         },
-        name: {
-          key: "name",
-          type: "Input",
-          props: { label: "Name", name: "name" },
-        },
-        email: {
-          key: "email",
-          type: "Input",
-          props: { label: "Email", name: "email" },
-        },
+        name: NAME_INPUT,
+        email: EMAIL_INPUT,
       },
     },
     stream:
-      '{"op":"add","path":"/elements/email","value":{"key":"email","type":"Input","props":{"label":"Email","name":"email"}}}',
+      '{"op":"add","path":"/elements/email","value":{"type":"Input","props":{"label":"Email","name":"email","type":"email","statePath":"/form/email","checks":[{"type":"required","message":"Email is required"},{"type":"email","message":"Please enter a valid email"}]}}}',
   },
   {
     tree: {
       root: "card",
+      state: FORM_STATE,
       elements: {
         card: {
-          key: "card",
           type: "Card",
           props: { title: "Contact Us", maxWidth: "md" },
           children: ["name", "email", "message"],
         },
-        name: {
-          key: "name",
-          type: "Input",
-          props: { label: "Name", name: "name" },
-        },
-        email: {
-          key: "email",
-          type: "Input",
-          props: { label: "Email", name: "email" },
-        },
-        message: {
-          key: "message",
-          type: "Textarea",
-          props: { label: "Message", name: "message" },
-        },
+        name: NAME_INPUT,
+        email: EMAIL_INPUT,
+        message: MESSAGE_INPUT,
       },
     },
     stream:
-      '{"op":"add","path":"/elements/message","value":{"key":"message","type":"Textarea","props":{"label":"Message","name":"message"}}}',
+      '{"op":"add","path":"/elements/message","value":{"type":"Textarea","props":{"label":"Message","name":"message","statePath":"/form/message","checks":[{"type":"required","message":"Message is required"}]}}}',
   },
   {
     tree: {
       root: "card",
+      state: FORM_STATE,
       elements: {
         card: {
-          key: "card",
           type: "Card",
           props: { title: "Contact Us", maxWidth: "md" },
           children: ["name", "email", "message", "submit"],
         },
-        name: {
-          key: "name",
-          type: "Input",
-          props: { label: "Name", name: "name" },
-        },
-        email: {
-          key: "email",
-          type: "Input",
-          props: { label: "Email", name: "email" },
-        },
-        message: {
-          key: "message",
-          type: "Textarea",
-          props: { label: "Message", name: "message" },
-        },
-        submit: {
-          key: "submit",
-          type: "Button",
-          props: { label: "Send Message", variant: "primary" },
-        },
+        name: NAME_INPUT,
+        email: EMAIL_INPUT,
+        message: MESSAGE_INPUT,
+        submit: SUBMIT_BUTTON,
       },
     },
     stream:
-      '{"op":"add","path":"/elements/submit","value":{"key":"submit","type":"Button","props":{"label":"Send Message","variant":"primary"}}}',
+      '{"op":"add","path":"/elements/submit","value":{"type":"Button","props":{"label":"Send Message","variant":"primary"},"on":{"press":{"action":"formSubmit"}}}}',
   },
 ];
 
 type Mode = "simulation" | "interactive";
 type Phase = "typing" | "streaming" | "complete";
-type Tab = "stream" | "json";
+type Tab = "stream" | "json" | "nested" | "catalog";
 type RenderView = "dynamic" | "static";
 
 interface DemoProps {
@@ -164,6 +165,51 @@ interface DemoProps {
   skipSimulation?: boolean;
 }
 
+/**
+ * Convert a flat Spec into a nested tree structure that is easier for humans
+ * to read. Children keys are resolved recursively into inline objects.
+ */
+function specToNested(spec: Spec): Record<string, unknown> {
+  function resolve(key: string): Record<string, unknown> {
+    const el = spec.elements[key];
+    if (!el) return { _key: key, _missing: true };
+
+    const node: Record<string, unknown> = { type: el.type };
+
+    if (el.props && Object.keys(el.props).length > 0) {
+      node.props = el.props;
+    }
+
+    if (el.visible !== undefined) {
+      node.visible = el.visible;
+    }
+
+    if (el.on && Object.keys(el.on).length > 0) {
+      node.on = el.on;
+    }
+
+    if (el.repeat) {
+      node.repeat = el.repeat;
+    }
+
+    if (el.children && el.children.length > 0) {
+      node.children = el.children.map(resolve);
+    }
+
+    return node;
+  }
+
+  const result: Record<string, unknown> = {};
+
+  if (spec.state && Object.keys(spec.state).length > 0) {
+    result.state = spec.state;
+  }
+
+  result.elements = resolve(spec.root);
+
+  return result;
+}
+
 const EXAMPLE_PROMPTS = [
   "Create a login form with email and password",
   "Build a feedback form with rating stars",
@@ -187,7 +233,7 @@ export function Demo({
   const [streamLines, setStreamLines] = useState<string[]>([]);
   const [activeTab, setActiveTab] = useState<Tab>("json");
   const [renderView, setRenderView] = useState<RenderView>("dynamic");
-  const [simulationTree, setSimulationTree] = useState<UITree | null>(null);
+  const [simulationTree, setSimulationTree] = useState<Spec | null>(null);
   const [isFullscreen, setIsFullscreen] = useState(false);
   const [showExportModal, setShowExportModal] = useState(false);
   const [selectedExportFile, setSelectedExportFile] = useState<string | null>(
@@ -198,6 +244,15 @@ export function Demo({
     new Set(),
   );
   const inputRef = useRef<HTMLInputElement>(null);
+  const [catalogSection, setCatalogSection] = useState<
+    "components" | "actions"
+  >("components");
+
+  // Catalog data for the catalog tab
+  const catalogData = useMemo(
+    () => buildCatalogDisplayData(playgroundCatalog.data),
+    [],
+  );
 
   // Disable body scroll when any modal is open
   useEffect(() => {
@@ -213,18 +268,19 @@ export function Demo({
 
   // Use the library's useUIStream hook for real API calls
   const {
-    tree: apiTree,
+    spec: apiSpec,
     isStreaming,
     send,
     clear,
+    rawLines: apiRawLines,
   } = useUIStream({
     api: "/api/generate",
-    onError: (err: Error) => console.error("Generation error:", err),
+    onError: (err: Error) => {
+      console.error("Generation error:", err);
+      toast.error(err.message || "Generation failed. Please try again.");
+    },
   } as Parameters<typeof useUIStream>[0]);
 
-  // Initialize interactive state for Select components
-  useInteractiveState();
-
   const currentSimulationStage =
     stageIndex >= 0 ? SIMULATION_STAGES[stageIndex] : null;
 
@@ -232,7 +288,7 @@ export function Demo({
   const currentTree =
     mode === "simulation"
       ? currentSimulationStage?.tree || simulationTree
-      : apiTree || simulationTree;
+      : apiSpec || simulationTree;
 
   const stopGeneration = useCallback(() => {
     if (mode === "simulation") {
@@ -289,25 +345,12 @@ export function Demo({
     return () => clearInterval(interval);
   }, [mode, phase]);
 
-  // Track stream lines from real API
+  // Track stream lines from real API (use raw JSONL patch lines)
   useEffect(() => {
-    if (mode === "interactive" && apiTree) {
-      // Convert tree to stream line for display
-      const streamLine = JSON.stringify({ tree: apiTree });
-      if (
-        !streamLines.includes(streamLine) &&
-        Object.keys(apiTree.elements).length > 0
-      ) {
-        setStreamLines((prev) => {
-          const lastLine = prev[prev.length - 1];
-          if (lastLine !== streamLine) {
-            return [...prev, streamLine];
-          }
-          return prev;
-        });
-      }
+    if (mode === "interactive" && apiRawLines.length > 0) {
+      setStreamLines(apiRawLines);
     }
-  }, [mode, apiTree, streamLines]);
+  }, [mode, apiRawLines]);
 
   const handleSubmit = useCallback(async () => {
     if (!userPrompt.trim() || isStreaming) return;
@@ -315,23 +358,15 @@ export function Demo({
     await send(userPrompt);
   }, [userPrompt, isStreaming, send]);
 
-  // Expose action handler for registry components - shows toast with text
-  useEffect(() => {
-    (
-      window as unknown as { __demoAction?: (text: string) => void }
-    ).__demoAction = (text: string) => {
-      toast(text);
-    };
-    return () => {
-      delete (window as unknown as { __demoAction?: (text: string) => void })
-        .__demoAction;
-    };
-  }, []);
-
   const jsonCode = currentTree
     ? JSON.stringify(currentTree, null, 2)
     : "// waiting...";
 
+  const nestedCode = useMemo(() => {
+    if (!currentTree || !currentTree.root) return "// waiting...";
+    return JSON.stringify(specToNested(currentTree), null, 2);
+  }, [currentTree]);
+
   // Generate all export files for Next.js project
   const exportedFiles = useMemo(() => {
     if (!currentTree || !currentTree.root) {
@@ -932,7 +967,13 @@ Open [http://localhost:3000](http://localhost:3000) to view.
     setMode("interactive");
     setPhase("complete");
     setUserPrompt(prompt);
-    setTimeout(() => inputRef.current?.focus(), 0);
+    setTimeout(() => {
+      const el = inputRef.current;
+      if (el) {
+        el.focus();
+        el.setSelectionRange(prompt.length, prompt.length);
+      }
+    }, 0);
   }, []);
 
   return (
@@ -1041,9 +1082,16 @@ Open [http://localhost:3000](http://localhost:3000) to view.
             ))}
           </div>
         ) : (
-          <div className="mt-2 text-xs text-muted-foreground text-center">
-            Try: &quot;Create a login form&quot; or &quot;Build a feedback form
-            with rating&quot;
+          <div className="mt-2 flex flex-wrap gap-1.5 justify-center">
+            {EXAMPLE_PROMPTS.slice(0, 2).map((prompt) => (
+              <button
+                key={prompt}
+                onClick={() => handleExampleClick(prompt)}
+                className="text-xs px-2 py-1 rounded-full border border-border text-muted-foreground hover:text-foreground hover:border-foreground/50 transition-colors"
+              >
+                {prompt}
+              </button>
+            ))}
           </div>
         )}
       </div>
@@ -1054,7 +1102,7 @@ Open [http://localhost:3000](http://localhost:3000) to view.
         {/* Tabbed code/stream/json panel */}
         <div className={`min-w-0 ${fullscreen ? "flex flex-col" : ""}`}>
           <div className="flex items-center gap-4 mb-2 h-6 shrink-0">
-            {(["json", "stream"] as const).map((tab) => (
+            {(["json", "nested", "stream", "catalog"] as const).map((tab) => (
               <button
                 key={tab}
                 onClick={() => setActiveTab(tab)}
@@ -1071,14 +1119,20 @@ Open [http://localhost:3000](http://localhost:3000) to view.
           <div
             className={`border border-border rounded bg-background font-mono text-xs text-left grid relative group ${fullscreen ? "flex-1 min-h-0" : "h-[28rem]"}`}
           >
-            <div className="absolute top-2 right-2 z-10">
-              <CopyButton
-                text={
-                  activeTab === "stream" ? streamLines.join("\n") : jsonCode
-                }
-                className="opacity-0 group-hover:opacity-100 text-muted-foreground"
-              />
-            </div>
+            {activeTab !== "catalog" && (
+              <div className="absolute top-2 right-2 z-10">
+                <CopyButton
+                  text={
+                    activeTab === "stream"
+                      ? streamLines.join("\n")
+                      : activeTab === "nested"
+                        ? nestedCode
+                        : jsonCode
+                  }
+                  className="opacity-0 group-hover:opacity-100 text-muted-foreground"
+                />
+              </div>
+            )}
             <div
               className={`overflow-auto ${activeTab === "stream" ? "" : "hidden"}`}
             >
@@ -1114,6 +1168,136 @@ Open [http://localhost:3000](http://localhost:3000) to view.
                 hideCopyButton
               />
             </div>
+            <div
+              className={`overflow-auto ${activeTab === "nested" ? "" : "hidden"}`}
+            >
+              <CodeBlock
+                code={nestedCode}
+                lang="json"
+                fillHeight
+                hideCopyButton
+              />
+            </div>
+            <div
+              className={`overflow-auto ${activeTab === "catalog" ? "" : "hidden"}`}
+            >
+              <div className="h-full flex flex-col text-sm font-sans">
+                <div className="flex items-center gap-3 px-3 h-9 border-b border-border">
+                  {(
+                    [
+                      {
+                        key: "components",
+                        label: `components (${catalogData.components.length})`,
+                      },
+                      {
+                        key: "actions",
+                        label: `actions (${catalogData.actions.length})`,
+                      },
+                    ] as const
+                  ).map(({ key, label }) => (
+                    <button
+                      key={key}
+                      onClick={() => setCatalogSection(key)}
+                      className={`text-xs font-mono transition-colors ${
+                        catalogSection === key
+                          ? "text-foreground"
+                          : "text-muted-foreground hover:text-foreground"
+                      }`}
+                    >
+                      {label}
+                    </button>
+                  ))}
+                </div>
+                <div className="flex-1 overflow-auto p-3">
+                  {catalogSection === "components" ? (
+                    <div className="space-y-3">
+                      {catalogData.components.map((comp) => (
+                        <div
+                          key={comp.name}
+                          className="pb-3 border-b border-border last:border-b-0"
+                        >
+                          <div className="flex items-baseline gap-2 mb-1">
+                            <span className="font-mono font-medium text-foreground">
+                              {comp.name}
+                            </span>
+                            {comp.slots.length > 0 && (
+                              <span className="text-[10px] font-mono px-1.5 py-0.5 rounded bg-muted text-muted-foreground">
+                                slots: {comp.slots.join(", ")}
+                              </span>
+                            )}
+                          </div>
+                          {comp.description && (
+                            <p className="text-xs text-muted-foreground mb-2">
+                              {comp.description}
+                            </p>
+                          )}
+                          {comp.props.length > 0 && (
+                            <div className="flex flex-wrap gap-1 mb-1">
+                              {comp.props.map((p) => (
+                                <span
+                                  key={p.name}
+                                  className="text-[11px] font-mono px-1.5 py-0.5 rounded bg-green-500/10 text-green-700 dark:text-green-400"
+                                >
+                                  {p.name}
+                                  <span className="text-green-700/50 dark:text-green-400/50">
+                                    : {p.type}
+                                  </span>
+                                </span>
+                              ))}
+                            </div>
+                          )}
+                          {comp.events.length > 0 && (
+                            <div className="flex flex-wrap gap-1 mt-1.5">
+                              {comp.events.map((e) => (
+                                <span
+                                  key={e}
+                                  className="text-[11px] font-mono px-1.5 py-0.5 rounded bg-blue-500/10 text-blue-600 dark:text-blue-400"
+                                >
+                                  on.{e}
+                                </span>
+                              ))}
+                            </div>
+                          )}
+                        </div>
+                      ))}
+                    </div>
+                  ) : (
+                    <div className="space-y-3">
+                      {catalogData.actions.map((action) => (
+                        <div
+                          key={action.name}
+                          className="pb-3 border-b border-border last:border-b-0"
+                        >
+                          <span className="font-mono font-medium text-foreground">
+                            {action.name}
+                          </span>
+                          {action.description && (
+                            <p className="text-xs text-muted-foreground mt-1 mb-2">
+                              {action.description}
+                            </p>
+                          )}
+                          {action.params.length > 0 && (
+                            <div className="flex flex-wrap gap-1">
+                              {action.params.map((p) => (
+                                <span
+                                  key={p.name}
+                                  className="text-[11px] font-mono px-1.5 py-0.5 rounded bg-green-500/10 text-green-700 dark:text-green-400"
+                                >
+                                  {p.name}
+                                  <span className="text-green-700/50 dark:text-green-400/50">
+                                    : {p.type}
+                                  </span>
+                                </span>
+                              ))}
+                            </div>
+                          )}
+                        </div>
+                      ))}
+                    </div>
+                  )}
+                </div>
+              </div>
+            </div>
           </div>
         </div>
 
@@ -1187,28 +1371,10 @@ Open [http://localhost:3000](http://localhost:3000) to view.
               <div className="overflow-auto">
                 {currentTree && currentTree.root ? (
                   <div className="animate-in fade-in duration-200 w-full min-h-full flex items-center justify-center p-3 py-4">
-                    <JSONUIProvider
-                      registry={
-                        demoRegistry as Parameters<
-                          typeof JSONUIProvider
-                        >[0]["registry"]
-                      }
-                    >
-                      <Renderer
-                        tree={currentTree}
-                        registry={
-                          demoRegistry as Parameters<
-                            typeof Renderer
-                          >[0]["registry"]
-                        }
-                        loading={isStreaming || isStreamingSimulation}
-                        fallback={
-                          fallbackComponent as Parameters<
-                            typeof Renderer
-                          >[0]["fallback"]
-                        }
-                      />
-                    </JSONUIProvider>
+                    <PlaygroundRenderer
+                      spec={currentTree}
+                      loading={isStreaming || isStreamingSimulation}
+                    />
                   </div>
                 ) : (
                   <div className="h-full flex items-center justify-center text-muted-foreground/50 text-sm">
@@ -1259,26 +1425,10 @@ Open [http://localhost:3000](http://localhost:3000) to view.
           <div className="flex-1 overflow-auto p-6">
             {currentTree && currentTree.root ? (
               <div className="w-full min-h-full flex items-center justify-center">
-                <JSONUIProvider
-                  registry={
-                    demoRegistry as Parameters<
-                      typeof JSONUIProvider
-                    >[0]["registry"]
-                  }
-                >
-                  <Renderer
-                    tree={currentTree}
-                    registry={
-                      demoRegistry as Parameters<typeof Renderer>[0]["registry"]
-                    }
-                    loading={isStreaming || isStreamingSimulation}
-                    fallback={
-                      fallbackComponent as Parameters<
-                        typeof Renderer
-                      >[0]["fallback"]
-                    }
-                  />
-                </JSONUIProvider>
+                <PlaygroundRenderer
+                  spec={currentTree}
+                  loading={isStreaming || isStreamingSimulation}
+                />
               </div>
             ) : (
               <div className="h-full flex items-center justify-center text-muted-foreground/50 text-sm">

apps/web/components/demo/alert.tsx

@@ -1,29 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Alert({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const alertType = props.type as string;
-  const alertClass =
-    alertType === "success"
-      ? "bg-green-50 dark:bg-green-950 border-green-200 dark:border-green-800 text-green-900 dark:text-green-100"
-      : alertType === "warning"
-        ? "bg-yellow-50 dark:bg-yellow-950 border-yellow-200 dark:border-yellow-800 text-yellow-900 dark:text-yellow-100"
-        : alertType === "error"
-          ? "bg-red-50 dark:bg-red-950 border-red-200 dark:border-red-800 text-red-900 dark:text-red-100"
-          : "bg-blue-50 dark:bg-blue-950 border-blue-200 dark:border-blue-800 text-blue-900 dark:text-blue-100";
-
-  return (
-    <div
-      className={`p-2 rounded border ${alertClass} ${baseClass} ${customClass}`}
-    >
-      <div className="text-xs font-medium">{props.title as string}</div>
-      {props.message ? (
-        <div className="text-[10px] mt-0.5">{props.message as string}</div>
-      ) : null}
-    </div>
-  );
-}

apps/web/components/demo/avatar.tsx

@@ -1,30 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Avatar({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const name = (props.name as string) || "?";
-  const initials = name
-    .split(" ")
-    .map((n) => n[0])
-    .join("")
-    .slice(0, 2)
-    .toUpperCase();
-  const avatarSize =
-    props.size === "lg"
-      ? "w-10 h-10 text-sm"
-      : props.size === "sm"
-        ? "w-6 h-6 text-[8px]"
-        : "w-8 h-8 text-[10px]";
-
-  return (
-    <div
-      className={`${avatarSize} rounded-full bg-muted flex items-center justify-center font-medium ${baseClass} ${customClass}`}
-    >
-      {initials}
-    </div>
-  );
-}

apps/web/components/demo/badge.tsx

@@ -1,26 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Badge({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const badgeVariant = props.variant as string;
-  const badgeClass =
-    badgeVariant === "success"
-      ? "bg-green-100 text-green-800"
-      : badgeVariant === "warning"
-        ? "bg-yellow-100 text-yellow-800"
-        : badgeVariant === "danger"
-          ? "bg-red-100 text-red-800"
-          : "bg-muted text-foreground";
-
-  return (
-    <span
-      className={`px-1.5 py-0.5 rounded text-[10px] font-medium ${badgeClass} ${baseClass} ${customClass}`}
-    >
-      {props.text as string}
-    </span>
-  );
-}

apps/web/components/demo/bar-graph.tsx

@@ -1,44 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-interface DataPoint {
-  label: string;
-  value: number;
-}
-
-export function BarGraph({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const data = (props.data as DataPoint[]) || [];
-  const title = props.title as string | undefined;
-  const maxValue = Math.max(...data.map((d) => d.value), 1);
-
-  return (
-    <div className={`${baseClass} ${customClass}`}>
-      {title ? (
-        <div className="text-xs font-medium mb-2 text-left">{title}</div>
-      ) : null}
-      <div className="flex gap-1">
-        {data.map((d, i) => (
-          <div key={i} className="flex-1 flex flex-col items-center gap-1">
-            <div className="text-[8px] text-muted-foreground">{d.value}</div>
-            <div className="w-full h-20 flex items-end">
-              <div
-                className="w-full bg-foreground/80 rounded-t transition-all"
-                style={{
-                  height: `${(d.value / maxValue) * 100}%`,
-                  minHeight: 2,
-                }}
-              />
-            </div>
-            <div className="text-[8px] text-muted-foreground truncate w-full text-center">
-              {d.label}
-            </div>
-          </div>
-        ))}
-      </div>
-    </div>
-  );
-}

apps/web/components/demo/button.tsx

@@ -1,32 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Button({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const variant = props.variant as string;
-  const label = props.label as string;
-  const actionText = (props.actionText as string) || label;
-  const btnClass =
-    variant === "danger"
-      ? "bg-red-500 text-white"
-      : variant === "secondary"
-        ? "bg-card border border-border text-foreground"
-        : "bg-foreground text-background";
-
-  return (
-    <button
-      type="button"
-      onClick={() =>
-        (
-          window as unknown as { __demoAction?: (text: string) => void }
-        ).__demoAction?.(actionText)
-      }
-      className={`self-start px-3 py-1.5 rounded text-xs font-medium hover:opacity-90 transition-opacity ${btnClass} ${baseClass} ${customClass}`}
-    >
-      {label}
-    </button>
-  );
-}

apps/web/components/demo/card.tsx

@@ -1,36 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Card({ element, children }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const maxWidthClass =
-    props.maxWidth === "sm"
-      ? "max-w-xs sm:min-w-[280px]"
-      : props.maxWidth === "md"
-        ? "max-w-sm sm:min-w-[320px]"
-        : props.maxWidth === "lg"
-          ? "max-w-md sm:min-w-[360px]"
-          : "w-full";
-  const centeredClass = props.centered ? "mx-auto" : "";
-
-  return (
-    <div
-      className={`border border-border rounded-lg p-3 bg-background overflow-hidden ${maxWidthClass} ${centeredClass} ${baseClass} ${customClass}`}
-    >
-      {props.title ? (
-        <div className="font-semibold text-sm mb-1 text-left">
-          {props.title as string}
-        </div>
-      ) : null}
-      {props.description ? (
-        <div className="text-[10px] text-muted-foreground mb-2 text-left">
-          {props.description as string}
-        </div>
-      ) : null}
-      <div className="space-y-2">{children}</div>
-    </div>
-  );
-}

apps/web/components/demo/checkbox.tsx

@@ -1,39 +0,0 @@
-"use client";
-
-import { useState } from "react";
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Checkbox({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const [checked, setChecked] = useState(!!props.checked);
-
-  return (
-    <label
-      className={`flex items-center gap-2 text-xs cursor-pointer ${baseClass} ${customClass}`}
-      onClick={() => setChecked((prev) => !prev)}
-    >
-      <div
-        className={`w-3.5 h-3.5 border border-border rounded-sm flex items-center justify-center transition-colors ${checked ? "bg-foreground" : "bg-background"}`}
-      >
-        {checked && (
-          <svg
-            className="w-2.5 h-2.5 text-background"
-            fill="none"
-            stroke="currentColor"
-            viewBox="0 0 24 24"
-          >
-            <path
-              strokeLinecap="round"
-              strokeLinejoin="round"
-              strokeWidth={3}
-              d="M5 13l4 4L19 7"
-            />
-          </svg>
-        )}
-      </div>
-      {props.label as string}
-    </label>
-  );
-}

apps/web/components/demo/divider.tsx

@@ -1,9 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Divider({ element }: ComponentRenderProps) {
-  const customClass = getCustomClass(element.props);
-  return <hr className={`border-border my-2 ${baseClass} ${customClass}`} />;
-}

apps/web/components/demo/fallback.tsx

@@ -1,15 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Fallback({ element }: ComponentRenderProps) {
-  const customClass = getCustomClass(element.props);
-  return (
-    <div
-      className={`text-[10px] text-muted-foreground ${baseClass} ${customClass}`}
-    >
-      [{element.type}]
-    </div>
-  );
-}

apps/web/components/demo/form.tsx

@@ -1,22 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Form({ element, children }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-
-  return (
-    <div
-      className={`border border-border rounded-lg p-3 bg-background ${baseClass} ${customClass}`}
-    >
-      {props.title ? (
-        <div className="font-semibold text-sm mb-2 text-left">
-          {props.title as string}
-        </div>
-      ) : null}
-      <div className="space-y-2">{children}</div>
-    </div>
-  );
-}

apps/web/components/demo/grid.tsx

@@ -1,27 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Grid({ element, children }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const hasCustomCols = customClass.includes("grid-cols-");
-  const cols = hasCustomCols
-    ? ""
-    : props.columns === 4
-      ? "grid-cols-4"
-      : props.columns === 3
-        ? "grid-cols-3"
-        : props.columns === 2
-          ? "grid-cols-2"
-          : "grid-cols-1";
-  const gridGap =
-    props.gap === "lg" ? "gap-3" : props.gap === "sm" ? "gap-1" : "gap-2";
-
-  return (
-    <div className={`grid ${cols} ${gridGap} ${baseClass} ${customClass}`}>
-      {children}
-    </div>
-  );
-}

apps/web/components/demo/heading.tsx

@@ -1,24 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Heading({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const level = (props.level as number) || 2;
-  const headingClass =
-    level === 1
-      ? "text-lg font-bold"
-      : level === 3
-        ? "text-xs font-semibold"
-        : level === 4
-          ? "text-[10px] font-semibold"
-          : "text-sm font-semibold";
-
-  return (
-    <div className={`${headingClass} text-left ${baseClass} ${customClass}`}>
-      {props.text as string}
-    </div>
-  );
-}

apps/web/components/demo/image.tsx

@@ -1,26 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Image({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const hasCustomSize =
-    customClass.includes("w-") || customClass.includes("h-");
-  const imgStyle = hasCustomSize
-    ? {}
-    : {
-        width: (props.width as number) || 80,
-        height: (props.height as number) || 60,
-      };
-
-  return (
-    <div
-      className={`bg-muted border border-border rounded flex items-center justify-center text-[10px] text-muted-foreground aspect-video ${baseClass} ${customClass}`}
-      style={imgStyle}
-    >
-      {(props.alt as string) || "img"}
-    </div>
-  );
-}

apps/web/components/demo/index.ts

@@ -1,83 +0,0 @@
-"use client";
-
-export type { ComponentRenderProps, ComponentRegistry } from "./types";
-export { useInteractiveState } from "./utils";
-
-export { Alert } from "./alert";
-export { Avatar } from "./avatar";
-export { Badge } from "./badge";
-export { BarGraph } from "./bar-graph";
-export { Button } from "./button";
-export { Card } from "./card";
-export { Checkbox } from "./checkbox";
-export { Divider } from "./divider";
-export { Fallback } from "./fallback";
-export { Form } from "./form";
-export { Grid } from "./grid";
-export { Heading } from "./heading";
-export { Image } from "./image";
-export { Input } from "./input";
-export { LineGraph } from "./line-graph";
-export { Link } from "./link";
-export { Progress } from "./progress";
-export { Radio } from "./radio";
-export { Rating } from "./rating";
-export { Select } from "./select";
-export { Stack } from "./stack";
-export { Switch } from "./switch";
-export { Text } from "./text";
-export { Textarea } from "./textarea";
-
-import type { ComponentRegistry } from "./types";
-import { Alert } from "./alert";
-import { Avatar } from "./avatar";
-import { Badge } from "./badge";
-import { BarGraph } from "./bar-graph";
-import { Button } from "./button";
-import { Card } from "./card";
-import { Checkbox } from "./checkbox";
-import { Divider } from "./divider";
-import { Fallback } from "./fallback";
-import { Form } from "./form";
-import { Grid } from "./grid";
-import { Heading } from "./heading";
-import { Image } from "./image";
-import { Input } from "./input";
-import { LineGraph } from "./line-graph";
-import { Link } from "./link";
-import { Progress } from "./progress";
-import { Radio } from "./radio";
-import { Rating } from "./rating";
-import { Select } from "./select";
-import { Stack } from "./stack";
-import { Switch } from "./switch";
-import { Text } from "./text";
-import { Textarea } from "./textarea";
-
-export const demoRegistry: ComponentRegistry = {
-  Alert,
-  Avatar,
-  Badge,
-  BarGraph,
-  Button,
-  Card,
-  Checkbox,
-  Divider,
-  Form,
-  Grid,
-  Heading,
-  Image,
-  Input,
-  LineGraph,
-  Link,
-  Progress,
-  Radio,
-  Rating,
-  Select,
-  Stack,
-  Switch,
-  Text,
-  Textarea,
-};
-
-export const fallbackComponent = Fallback;

apps/web/components/demo/input.tsx

@@ -1,24 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Input({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-
-  return (
-    <div className={`${baseClass} ${customClass}`}>
-      {props.label ? (
-        <label className="text-[10px] text-muted-foreground block mb-0.5 text-left">
-          {props.label as string}
-        </label>
-      ) : null}
-      <input
-        type={(props.type as string) || "text"}
-        placeholder={(props.placeholder as string) || ""}
-        className="h-7 w-full bg-background border border-border rounded px-2 text-xs focus:outline-none focus:ring-1 focus:ring-foreground/20"
-      />
-    </div>
-  );
-}

apps/web/components/demo/line-graph.tsx

@@ -1,116 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-interface DataPoint {
-  label: string;
-  value: number;
-}
-
-export function LineGraph({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const data = (props.data as DataPoint[]) || [];
-  const title = props.title as string | undefined;
-  const maxValue = Math.max(...data.map((d) => d.value));
-  const minValue = Math.min(...data.map((d) => d.value));
-  const range = maxValue - minValue || 1;
-
-  // SVG dimensions with padding
-  const width = 300;
-  const height = 100;
-  const padding = { top: 10, right: 10, bottom: 10, left: 10 };
-  const chartWidth = width - padding.left - padding.right;
-  const chartHeight = height - padding.top - padding.bottom;
-
-  // Calculate points for the SVG path
-  const points = data.map((d, i) => {
-    const x =
-      padding.left +
-      (data.length > 1 ? (i / (data.length - 1)) * chartWidth : chartWidth / 2);
-    const y =
-      padding.top + chartHeight - ((d.value - minValue) / range) * chartHeight;
-    return { x, y, ...d };
-  });
-
-  const pathD =
-    points.length > 0
-      ? `M ${points.map((p) => `${p.x} ${p.y}`).join(" L ")}`
-      : "";
-
-  return (
-    <div className={`${baseClass} ${customClass}`}>
-      {title ? (
-        <div className="text-xs font-medium mb-2 text-left">{title}</div>
-      ) : null}
-      <div className="relative h-24">
-        <svg viewBox={`0 0 ${width} ${height}`} className="w-full h-full">
-          {/* Grid lines */}
-          <line
-            x1={padding.left}
-            y1={padding.top + chartHeight / 2}
-            x2={width - padding.right}
-            y2={padding.top + chartHeight / 2}
-            stroke="currentColor"
-            strokeOpacity="0.1"
-            strokeWidth="1"
-          />
-          <line
-            x1={padding.left}
-            y1={padding.top}
-            x2={width - padding.right}
-            y2={padding.top}
-            stroke="currentColor"
-            strokeOpacity="0.1"
-            strokeWidth="1"
-          />
-          <line
-            x1={padding.left}
-            y1={height - padding.bottom}
-            x2={width - padding.right}
-            y2={height - padding.bottom}
-            stroke="currentColor"
-            strokeOpacity="0.1"
-            strokeWidth="1"
-          />
-          {/* Line */}
-          {pathD && (
-            <path
-              d={pathD}
-              fill="none"
-              stroke="currentColor"
-              strokeWidth="2"
-              strokeLinecap="round"
-              strokeLinejoin="round"
-              className="text-foreground/80"
-            />
-          )}
-          {/* Points */}
-          {points.map((p, i) => (
-            <circle
-              key={i}
-              cx={p.x}
-              cy={p.y}
-              r="4"
-              className="fill-foreground"
-            />
-          ))}
-        </svg>
-      </div>
-      {data.length > 0 && (
-        <div className="flex justify-between mt-1">
-          {data.map((d, i) => (
-            <div
-              key={i}
-              className="text-[8px] text-muted-foreground text-center"
-              style={{ width: `${100 / data.length}%` }}
-            >
-              {d.label}
-            </div>
-          ))}
-        </div>
-      )}
-    </div>
-  );
-}

apps/web/components/demo/link.tsx

@@ -1,17 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Link({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-
-  return (
-    <span
-      className={`text-xs text-muted-foreground hover:text-foreground cursor-pointer transition-colors underline-offset-2 hover:underline ${baseClass} ${customClass}`}
-    >
-      {props.label as string}
-    </span>
-  );
-}

apps/web/components/demo/progress.tsx

@@ -1,26 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Progress({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const value = Math.min(100, Math.max(0, (props.value as number) || 0));
-
-  return (
-    <div className={`${baseClass} ${customClass}`}>
-      {props.label ? (
-        <div className="text-[10px] text-muted-foreground mb-1 text-left">
-          {props.label as string}
-        </div>
-      ) : null}
-      <div className="h-2 bg-muted rounded-full overflow-hidden">
-        <div
-          className="h-full bg-foreground rounded-full transition-all"
-          style={{ width: `${value}%` }}
-        />
-      </div>
-    </div>
-  );
-}

apps/web/components/demo/radio.tsx

@@ -1,38 +0,0 @@
-"use client";
-
-import { useState } from "react";
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Radio({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const options = (props.options as string[]) || [];
-  const [selected, setSelected] = useState(0);
-
-  return (
-    <div className={`space-y-1 ${baseClass} ${customClass}`}>
-      {props.label ? (
-        <div className="text-[10px] text-muted-foreground mb-1 text-left">
-          {props.label as string}
-        </div>
-      ) : null}
-      {options.map((opt, i) => (
-        <label
-          key={i}
-          className="flex items-center gap-2 text-xs cursor-pointer"
-          onClick={() => setSelected(i)}
-        >
-          <div
-            className={`w-3.5 h-3.5 border border-border rounded-full flex items-center justify-center transition-colors ${selected === i ? "border-foreground" : ""}`}
-          >
-            {selected === i && (
-              <div className="w-2 h-2 rounded-full bg-foreground" />
-            )}
-          </div>
-          {opt}
-        </label>
-      ))}
-    </div>
-  );
-}

apps/web/components/demo/rating.tsx

@@ -1,31 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Rating({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const ratingValue = (props.value as number) || 0;
-  const maxRating = (props.max as number) || 5;
-
-  return (
-    <div className={`${baseClass} ${customClass}`}>
-      {props.label ? (
-        <div className="text-[10px] text-muted-foreground mb-1 text-left">
-          {props.label as string}
-        </div>
-      ) : null}
-      <div className="flex gap-0.5">
-        {Array.from({ length: maxRating }).map((_, i) => (
-          <span
-            key={i}
-            className={`text-sm ${i < ratingValue ? "text-yellow-400" : "text-muted"}`}
-          >
-            *
-          </span>
-        ))}
-      </div>
-    </div>
-  );
-}

apps/web/components/demo/select.tsx

@@ -1,70 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import {
-  baseClass,
-  getCustomClass,
-  getOpenSelect,
-  setOpenSelectValue,
-  getSelectValue,
-  setSelectValueForKey,
-} from "./utils";
-
-export function Select({ element }: ComponentRenderProps) {
-  const { props, key } = element;
-  const customClass = getCustomClass(props);
-  const options = (props.options as string[]) || [];
-  const selectedValue = getSelectValue(key);
-  const isOpen = getOpenSelect() === key;
-
-  return (
-    <div className={`relative ${baseClass} ${customClass}`}>
-      {props.label ? (
-        <label className="text-[10px] text-muted-foreground block mb-0.5 text-left">
-          {props.label as string}
-        </label>
-      ) : null}
-      <div
-        onClick={() => setOpenSelectValue(isOpen ? null : key)}
-        className="h-7 w-full bg-background border border-border rounded px-2 text-xs flex items-center justify-between cursor-pointer hover:border-foreground/30 transition-colors"
-      >
-        <span
-          className={
-            selectedValue ? "text-foreground" : "text-muted-foreground/50"
-          }
-        >
-          {selectedValue || (props.placeholder as string) || "Select..."}
-        </span>
-        <svg
-          className={`w-3 h-3 transition-transform ${isOpen ? "rotate-180" : ""}`}
-          fill="none"
-          stroke="currentColor"
-          viewBox="0 0 24 24"
-        >
-          <path
-            strokeLinecap="round"
-            strokeLinejoin="round"
-            strokeWidth={2}
-            d="M19 9l-7 7-7-7"
-          />
-        </svg>
-      </div>
-      {isOpen && options.length > 0 && (
-        <div className="absolute z-10 top-full left-0 right-0 mt-1 bg-background border border-border rounded shadow-lg overflow-hidden">
-          {options.map((opt, i) => (
-            <div
-              key={i}
-              onClick={() => {
-                setSelectValueForKey(key, opt);
-                setOpenSelectValue(null);
-              }}
-              className={`px-2 py-1.5 text-xs text-left cursor-pointer hover:bg-muted transition-colors ${selectedValue === opt ? "bg-muted" : ""}`}
-            >
-              {opt}
-            </div>
-          ))}
-        </div>
-      )}
-    </div>
-  );
-}

apps/web/components/demo/stack.tsx

@@ -1,20 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Stack({ element, children }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const isHorizontal = props.direction === "horizontal";
-  const stackGap =
-    props.gap === "lg" ? "gap-3" : props.gap === "sm" ? "gap-1" : "gap-2";
-
-  return (
-    <div
-      className={`flex ${isHorizontal ? "flex-row flex-wrap items-center" : "flex-col"} ${stackGap} ${baseClass} ${customClass}`}
-    >
-      {children}
-    </div>
-  );
-}

apps/web/components/demo/switch.tsx

@@ -1,27 +0,0 @@
-"use client";
-
-import { useState } from "react";
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Switch({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const [checked, setChecked] = useState(!!props.checked);
-
-  return (
-    <label
-      className={`flex items-center justify-between gap-2 text-xs cursor-pointer ${baseClass} ${customClass}`}
-      onClick={() => setChecked((prev) => !prev)}
-    >
-      <span>{props.label as string}</span>
-      <div
-        className={`w-8 h-4 rounded-full relative transition-colors ${checked ? "bg-foreground" : "bg-border"}`}
-      >
-        <div
-          className={`absolute w-3 h-3 rounded-full bg-background top-0.5 transition-all ${checked ? "right-0.5" : "left-0.5"}`}
-        />
-      </div>
-    </label>
-  );
-}

apps/web/components/demo/text.tsx

@@ -1,22 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Text({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const textVariant = props.variant as string;
-  const textClass =
-    textVariant === "caption"
-      ? "text-[10px]"
-      : textVariant === "muted"
-        ? "text-xs text-muted-foreground"
-        : "text-xs";
-
-  return (
-    <p className={`${textClass} text-left ${baseClass} ${customClass}`}>
-      {props.content as string}
-    </p>
-  );
-}

apps/web/components/demo/textarea.tsx

@@ -1,25 +0,0 @@
-"use client";
-
-import type { ComponentRenderProps } from "./types";
-import { baseClass, getCustomClass } from "./utils";
-
-export function Textarea({ element }: ComponentRenderProps) {
-  const { props } = element;
-  const customClass = getCustomClass(props);
-  const rows = (props.rows as number) || 3;
-
-  return (
-    <div className={`${baseClass} ${customClass}`}>
-      {props.label ? (
-        <label className="text-[10px] text-muted-foreground block mb-0.5 text-left">
-          {props.label as string}
-        </label>
-      ) : null}
-      <textarea
-        placeholder={(props.placeholder as string) || ""}
-        rows={rows}
-        className="w-full bg-background border border-border rounded px-2 py-1 text-xs resize-none focus:outline-none focus:ring-1 focus:ring-foreground/20"
-      />
-    </div>
-  );
-}

apps/web/components/demo/types.ts

@@ -1,14 +0,0 @@
-import type { ReactNode } from "react";
-import type { UIElement, Action } from "@json-render/core";
-
-export interface ComponentRenderProps {
-  element: UIElement;
-  children?: ReactNode;
-  onAction?: (action: Action) => void;
-  loading?: boolean;
-}
-
-export type ComponentRegistry = Record<
-  string,
-  React.ComponentType<ComponentRenderProps>
->;

apps/web/components/demo/utils.ts

@@ -1,52 +0,0 @@
-"use client";
-
-import { useState } from "react";
-
-// Shared animation class
-export const baseClass =
-  "animate-in fade-in slide-in-from-bottom-1 duration-200";
-
-// Helper to get custom classes
-export function getCustomClass(props: Record<string, unknown>): string {
-  return Array.isArray(props.className)
-    ? (props.className as string[]).join(" ")
-    : "";
-}
-
-// State for interactive components
-let openSelect: string | null = null;
-let setOpenSelect: (v: string | null) => void = () => {};
-let selectValues: Record<string, string> = {};
-let setSelectValues: (
-  fn: (prev: Record<string, string>) => Record<string, string>,
-) => void = () => {};
-
-export function useInteractiveState() {
-  const [_openSelect, _setOpenSelect] = useState<string | null>(null);
-  const [_selectValues, _setSelectValues] = useState<Record<string, string>>(
-    {},
-  );
-
-  openSelect = _openSelect;
-  setOpenSelect = _setOpenSelect;
-  selectValues = _selectValues;
-  setSelectValues = _setSelectValues;
-
-  return { openSelect, selectValues };
-}
-
-export function getOpenSelect() {
-  return openSelect;
-}
-
-export function setOpenSelectValue(v: string | null) {
-  setOpenSelect(v);
-}
-
-export function getSelectValue(key: string) {
-  return selectValues[key];
-}
-
-export function setSelectValueForKey(key: string, value: string) {
-  setSelectValues((prev) => ({ ...prev, [key]: value }));
-}

apps/web/components/docs-chat.tsx

@@ -0,0 +1,540 @@
+"use client";
+
+import {
+  useRef,
+  useEffect,
+  useState,
+  useCallback,
+  type PointerEvent as ReactPointerEvent,
+} from "react";
+import { useChat } from "@ai-sdk/react";
+import { DefaultChatTransport } from "ai";
+import { Streamdown } from "streamdown";
+import Link from "next/link";
+import { Sheet, SheetContent, SheetTitle } from "@/components/ui/sheet";
+
+const STORAGE_KEY = "docs-chat-messages";
+const transport = new DefaultChatTransport({ api: "/api/docs-chat" });
+
+const DESKTOP_DEFAULT_WIDTH = 400;
+const DESKTOP_MIN_WIDTH = 300;
+const DESKTOP_MAX_WIDTH = 700;
+
+function setCookie(name: string, value: string) {
+  document.cookie = `${name}=${encodeURIComponent(value)};path=/;max-age=${60 * 60 * 24 * 365};samesite=lax`;
+}
+
+const TOOL_LABELS: Record<
+  string,
+  { label: string; pastLabel: string; argKey?: string }
+> = {
+  readFile: { label: "Reading", pastLabel: "Read", argKey: "path" },
+  bash: { label: "Running", pastLabel: "Ran", argKey: "command" },
+};
+
+function isToolPart(part: { type: string }): part is {
+  type: string;
+  toolCallId: string;
+  toolName?: string;
+  state: string;
+  input?: Record<string, unknown>;
+  output?: unknown;
+  errorText?: string;
+} {
+  return part.type.startsWith("tool-") || part.type === "dynamic-tool";
+}
+
+function getToolName(part: { type: string; toolName?: string }): string {
+  if (part.type === "dynamic-tool") return part.toolName ?? "tool";
+  return part.type.replace(/^tool-/, "");
+}
+
+function ToolCallDisplay({
+  part,
+}: {
+  part: {
+    type: string;
+    toolCallId: string;
+    toolName?: string;
+    state: string;
+    input?: Record<string, unknown>;
+    output?: unknown;
+    errorText?: string;
+  };
+}) {
+  const toolName = getToolName(part);
+  const config = TOOL_LABELS[toolName] ?? {
+    label: toolName,
+    pastLabel: toolName,
+  };
+  const isDone = part.state === "output-available";
+  const isError = part.state === "output-error";
+  const isRunning = !isDone && !isError;
+  const displayLabel = isRunning ? config.label : config.pastLabel;
+
+  const args = (part.input ?? {}) as Record<string, unknown>;
+  const argValue = config.argKey ? args[config.argKey] : undefined;
+  const argPreview =
+    argValue != null
+      ? String(argValue)
+          .replace(/\/workspace\//g, "/")
+          .replace(/\.md$/, "")
+          .replace(/\/index$/, "")
+      : "";
+
+  // Link to the docs page if it's a /docs/ path from readFile
+  const docsLink =
+    toolName === "readFile" &&
+    (argPreview === "/docs" || argPreview.startsWith("/docs/"))
+      ? argPreview
+      : null;
+
+  const argEl = argPreview ? (
+    docsLink ? (
+      <Link href={docsLink} className="truncate underline underline-offset-2">
+        {argPreview}
+      </Link>
+    ) : (
+      <span className="truncate">{argPreview}</span>
+    )
+  ) : null;
+
+  return (
+    <div className="text-xs py-0.5 min-w-0">
+      {isRunning ? (
+        <span className="inline-flex items-center gap-1 font-mono text-muted-foreground animate-tool-shimmer min-w-0 max-w-full">
+          <span className="shrink-0">{displayLabel}</span>
+          {argEl}
+        </span>
+      ) : (
+        <span className="inline-flex items-center gap-1 font-mono text-muted-foreground/60 min-w-0 max-w-full">
+          <span className="shrink-0">{displayLabel}</span>
+          {argEl}
+          {isError && <span className="text-destructive">failed</span>}
+        </span>
+      )}
+    </div>
+  );
+}
+
+const SUGGESTIONS = [
+  "What is json-render?",
+  "How do I install it?",
+  "How does streaming work?",
+  "What components are available?",
+  "How do I create a custom schema?",
+];
+
+export function DocsChat({
+  defaultOpen = false,
+  defaultWidth = DESKTOP_DEFAULT_WIDTH,
+}: {
+  defaultOpen?: boolean;
+  defaultWidth?: number;
+}) {
+  const [open, setOpen] = useState(defaultOpen);
+  const [input, setInput] = useState("");
+  const [isDesktop, setIsDesktop] = useState(false);
+  const [hasMounted, setHasMounted] = useState(false);
+  const [desktopWidth, setDesktopWidth] = useState(
+    Math.min(DESKTOP_MAX_WIDTH, Math.max(DESKTOP_MIN_WIDTH, defaultWidth)),
+  );
+  const messagesScrollRef = useRef<HTMLDivElement>(null);
+  const inputRef = useRef<HTMLTextAreaElement>(null);
+  const restoredRef = useRef(false);
+  const isDraggingRef = useRef(false);
+
+  const { messages, sendMessage, status, setMessages, error } = useChat({
+    transport,
+  });
+
+  const isLoading = status === "streaming" || status === "submitted";
+  const showMessages = messages.length > 0 || !!error || isLoading;
+
+  // Detect desktop vs mobile. Close sidebar on mobile if it was open from cookie.
+  useEffect(() => {
+    const mq = window.matchMedia("(min-width: 640px)");
+    setIsDesktop(mq.matches);
+    setHasMounted(true);
+    // If on mobile but sidebar was open from cookie, close it
+    if (!mq.matches && defaultOpen) {
+      setOpen(false);
+    }
+    const handler = (e: MediaQueryListEvent) => setIsDesktop(e.matches);
+    mq.addEventListener("change", handler);
+    return () => mq.removeEventListener("change", handler);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
+  // Persist open state to cookie (only after mount to avoid overwriting on mobile)
+  useEffect(() => {
+    if (hasMounted) {
+      setCookie("docs-chat-open", String(open));
+    }
+  }, [open, hasMounted]);
+
+  // Push page content on desktop when pane is open.
+  // Use padding on body so the page scrollbar stays at the viewport edge (behind the sidebar)
+  // instead of appearing right next to the sidebar's scrollbar.
+  useEffect(() => {
+    const body = document.body;
+    if (isDesktop && open) {
+      body.style.paddingRight = `${desktopWidth}px`;
+      if (!isDraggingRef.current) {
+        body.style.transition = "padding-right 150ms ease";
+      }
+    } else if (isDesktop) {
+      body.style.paddingRight = "0px";
+      body.style.transition = "padding-right 150ms ease";
+    }
+    return () => {
+      body.style.paddingRight = "0px";
+      body.style.transition = "";
+    };
+  }, [isDesktop, open, desktopWidth]);
+
+  // Resize handle drag
+  const handleResizePointerDown = useCallback(
+    (e: ReactPointerEvent<HTMLDivElement>) => {
+      e.preventDefault();
+      isDraggingRef.current = true;
+      document.documentElement.style.transition = "none";
+      const startX = e.clientX;
+      const startWidth = desktopWidth;
+
+      const onPointerMove = (ev: globalThis.PointerEvent) => {
+        const delta = startX - ev.clientX;
+        const newWidth = Math.min(
+          DESKTOP_MAX_WIDTH,
+          Math.max(DESKTOP_MIN_WIDTH, startWidth + delta),
+        );
+        setDesktopWidth(newWidth);
+      };
+
+      const onPointerUp = () => {
+        isDraggingRef.current = false;
+        document.documentElement.style.transition = "";
+        document.removeEventListener("pointermove", onPointerMove);
+        document.removeEventListener("pointerup", onPointerUp);
+      };
+
+      document.addEventListener("pointermove", onPointerMove);
+      document.addEventListener("pointerup", onPointerUp);
+    },
+    [desktopWidth],
+  );
+
+  // Persist width to cookie
+  useEffect(() => {
+    setCookie("docs-chat-width", String(desktopWidth));
+  }, [desktopWidth]);
+
+  // Restore messages from sessionStorage on mount
+  useEffect(() => {
+    if (restoredRef.current) return;
+    restoredRef.current = true;
+    try {
+      const stored = sessionStorage.getItem(STORAGE_KEY);
+      if (stored) {
+        const parsed = JSON.parse(stored);
+        if (Array.isArray(parsed) && parsed.length > 0) {
+          setMessages(parsed);
+        }
+      }
+    } catch {
+      // ignore parse errors
+    }
+  }, [setMessages]);
+
+  // Save completed messages to sessionStorage
+  useEffect(() => {
+    if (!restoredRef.current) return;
+    if (isLoading) return;
+    if (messages.length === 0) {
+      sessionStorage.removeItem(STORAGE_KEY);
+      return;
+    }
+    try {
+      sessionStorage.setItem(STORAGE_KEY, JSON.stringify(messages));
+    } catch {
+      // ignore quota errors
+    }
+  }, [messages, isLoading]);
+
+  // Cmd+K to open sidebar and focus prompt, Escape to close
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === "k" && (e.metaKey || e.ctrlKey)) {
+        e.preventDefault();
+        setOpen((prev) => {
+          if (!prev) {
+            setTimeout(() => inputRef.current?.focus(), 200);
+          }
+          return !prev;
+        });
+      }
+      if (e.key === "Escape" && open && isDesktop) {
+        setOpen(false);
+      }
+    };
+    document.addEventListener("keydown", handleKeyDown);
+    return () => document.removeEventListener("keydown", handleKeyDown);
+  }, [open, isDesktop]);
+
+  // Auto-focus input when opened
+  useEffect(() => {
+    if (open) {
+      const timer = setTimeout(() => inputRef.current?.focus(), 200);
+      return () => clearTimeout(timer);
+    }
+  }, [open]);
+
+  // Auto-open when error occurs
+  useEffect(() => {
+    if (error) setOpen(true);
+  }, [error]);
+
+  // Scroll to bottom when messages change or error occurs
+  useEffect(() => {
+    const el = messagesScrollRef.current;
+    if (!el) return;
+    requestAnimationFrame(() => {
+      el.scrollTop = el.scrollHeight;
+    });
+  }, [messages, error]);
+
+  const handleSubmit = useCallback(
+    (e: React.FormEvent) => {
+      e.preventDefault();
+      if (!input.trim() || isLoading) return;
+      sendMessage({ text: input });
+      setInput("");
+    },
+    [input, isLoading, sendMessage],
+  );
+
+  const handleClear = useCallback(() => {
+    setMessages([]);
+    sessionStorage.removeItem(STORAGE_KEY);
+  }, [setMessages]);
+
+  const hasVisibleContent = (
+    parts: (typeof messages)[number]["parts"],
+  ): boolean => {
+    return parts.some(
+      (p) => (p.type === "text" && p.text.length > 0) || isToolPart(p),
+    );
+  };
+
+  // Shared chat panel content used by both desktop and mobile
+  const chatPanel = (
+    <>
+      {/* Header */}
+      <div className="flex items-center justify-between px-4 py-3 border-b shrink-0">
+        <span className="text-sm font-medium">json-render Docs</span>
+        <div className="flex items-center gap-3">
+          {showMessages && (
+            <button
+              onClick={handleClear}
+              className="text-xs text-muted-foreground hover:text-foreground transition-colors"
+              aria-label="Clear conversation"
+            >
+              Clear
+            </button>
+          )}
+          <button
+            onClick={() => setOpen(false)}
+            className="text-muted-foreground hover:text-foreground transition-colors"
+            aria-label="Close panel"
+          >
+            <svg
+              width="14"
+              height="14"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              strokeWidth="2"
+              strokeLinecap="round"
+              strokeLinejoin="round"
+            >
+              <line x1="18" y1="6" x2="6" y2="18" />
+              <line x1="6" y1="6" x2="18" y2="18" />
+            </svg>
+          </button>
+        </div>
+      </div>
+
+      {/* Content: suggestions or messages */}
+      {showMessages ? (
+        <div
+          ref={messagesScrollRef}
+          className="flex-1 min-h-0 p-4 space-y-4 overflow-y-auto"
+        >
+          {messages.map((message) => {
+            if (!hasVisibleContent(message.parts)) return null;
+            return (
+              <div key={message.id}>
+                {message.role === "user" ? (
+                  <div className="text-sm text-muted-foreground whitespace-pre-wrap leading-relaxed">
+                    {message.parts
+                      .filter(
+                        (p): p is Extract<typeof p, { type: "text" }> =>
+                          p.type === "text",
+                      )
+                      .map((p) => p.text)
+                      .join("")}
+                  </div>
+                ) : (
+                  <div className="space-y-2">
+                    {message.parts.map((part, i) => {
+                      if (part.type === "text" && part.text) {
+                        return (
+                          <div
+                            key={i}
+                            className="docs-chat-content text-sm text-foreground/90 leading-relaxed prose prose-sm dark:prose-invert max-w-none"
+                          >
+                            <Streamdown>{part.text}</Streamdown>
+                          </div>
+                        );
+                      }
+                      if (isToolPart(part)) {
+                        return (
+                          <ToolCallDisplay key={part.toolCallId} part={part} />
+                        );
+                      }
+                      return null;
+                    })}
+                  </div>
+                )}
+              </div>
+            );
+          })}
+          {error && (
+            <div className="text-sm text-destructive/80 bg-destructive/10 rounded-md px-3 py-2">
+              {(() => {
+                try {
+                  const parsed = JSON.parse(error.message);
+                  return parsed.message || parsed.error || error.message;
+                } catch {
+                  return (
+                    error.message || "Something went wrong. Please try again."
+                  );
+                }
+              })()}
+            </div>
+          )}
+        </div>
+      ) : (
+        <div className="flex-1 min-h-0 flex flex-col">
+          <div className="flex flex-wrap gap-2 p-4">
+            {SUGGESTIONS.map((s) => (
+              <button
+                key={s}
+                type="button"
+                onClick={() => {
+                  sendMessage({ text: s });
+                }}
+                className="text-xs px-3 py-1.5 rounded-full border bg-secondary font-medium text-muted-foreground hover:text-foreground transition-colors"
+              >
+                {s}
+              </button>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Input bar */}
+      <form
+        onSubmit={handleSubmit}
+        className="flex items-end gap-2 px-4 py-3 border-t shrink-0"
+      >
+        <textarea
+          ref={inputRef}
+          value={input}
+          onChange={(e) => {
+            setInput(e.target.value);
+            e.target.style.height = "auto";
+            e.target.style.height = `${e.target.scrollHeight}px`;
+          }}
+          rows={1}
+          enterKeyHint="send"
+          placeholder="Ask a question..."
+          onKeyDown={(e) => {
+            if (e.key === "Enter" && !e.shiftKey) {
+              e.preventDefault();
+              handleSubmit(e);
+            }
+          }}
+          className="flex-1 bg-transparent text-base sm:text-sm text-foreground outline-none disabled:opacity-50 resize-none max-h-32 leading-relaxed placeholder:text-muted-foreground"
+        />
+        <button
+          type="submit"
+          disabled={isLoading || !input.trim()}
+          className="bg-primary text-primary-foreground rounded-full p-1.5 hover:bg-primary/90 transition-colors disabled:opacity-30 shrink-0"
+          aria-label="Send message"
+        >
+          <svg
+            width="16"
+            height="16"
+            viewBox="0 0 24 24"
+            fill="none"
+            stroke="currentColor"
+            strokeWidth="2"
+            strokeLinecap="round"
+            strokeLinejoin="round"
+          >
+            <line x1="12" y1="19" x2="12" y2="5" />
+            <polyline points="5 12 12 5 19 12" />
+          </svg>
+        </button>
+      </form>
+    </>
+  );
+
+  return (
+    <>
+      {/* Ask AI trigger button */}
+      {!open && (
+        <button
+          onClick={() => setOpen(true)}
+          className="fixed z-50 bottom-4 left-1/2 -translate-x-1/2 sm:left-auto sm:translate-x-0 sm:right-4 flex items-center gap-2 px-4 py-2 rounded-lg border bg-background text-primary shadow-lg hover:bg-primary hover:text-primary-foreground transition-colors text-sm font-medium"
+          aria-label="Ask AI"
+        >
+          Ask AI
+          <kbd className="hidden sm:inline-flex items-center gap-0.5 text-xs opacity-60 font-mono">
+            <span>&#8984;</span>K
+          </kbd>
+        </button>
+      )}
+
+      {/* Desktop: resizable side pane — always rendered, hidden on mobile via CSS */}
+      <aside
+        className={`hidden sm:flex fixed top-0 right-0 bottom-0 z-40 border-l bg-background transition-transform duration-150 ease-in-out ${open ? "translate-x-0" : "translate-x-full"}`}
+        style={{ width: desktopWidth }}
+        aria-hidden={!open}
+      >
+        {/* Resize handle */}
+        <div
+          onPointerDown={handleResizePointerDown}
+          className="absolute top-0 bottom-0 left-0 w-1.5 cursor-col-resize hover:bg-ring/30 active:bg-ring/50 transition-colors z-10"
+        />
+        <div className="flex flex-col flex-1 min-w-0">{chatPanel}</div>
+      </aside>
+
+      {/* Mobile: Sheet overlay/drawer — only after mount to avoid flash on desktop */}
+      {hasMounted && !isDesktop && (
+        <Sheet open={open} onOpenChange={setOpen}>
+          <SheetContent
+            side="right"
+            overlayClassName="!bg-background"
+            className="!inset-0 !w-full !h-full !max-w-none p-0 flex flex-col"
+            style={{ backgroundColor: "var(--background)", opacity: 1 }}
+          >
+            <SheetTitle className="sr-only">AI Chat</SheetTitle>
+            {chatPanel}
+          </SheetContent>
+        </Sheet>
+      )}
+    </>
+  );
+}

apps/web/components/docs-mobile-nav.tsx

@@ -10,53 +10,15 @@ import {
   SheetContent,
   SheetTitle,
 } from "@/components/ui/sheet";
-
-const navigation = [
-  {
-    title: "Getting Started",
-    items: [
-      { title: "Introduction", href: "/docs" },
-      { title: "Installation", href: "/docs/installation" },
-      { title: "Quick Start", href: "/docs/quick-start" },
-    ],
-  },
-  {
-    title: "Core Concepts",
-    items: [
-      { title: "Catalog", href: "/docs/catalog" },
-      { title: "Components", href: "/docs/components" },
-      { title: "Data Binding", href: "/docs/data-binding" },
-      { title: "Actions", href: "/docs/actions" },
-      { title: "Visibility", href: "/docs/visibility" },
-      { title: "Validation", href: "/docs/validation" },
-    ],
-  },
-  {
-    title: "Guides",
-    items: [
-      { title: "AI SDK Integration", href: "/docs/ai-sdk" },
-      { title: "Streaming", href: "/docs/streaming" },
-    ],
-  },
-  {
-    title: "API Reference",
-    items: [
-      { title: "@json-render/core", href: "/docs/api/core" },
-      { title: "@json-render/react", href: "/docs/api/react" },
-    ],
-  },
-];
-
-// Flatten all pages for current page lookup
-const allPages = navigation.flatMap((section) => section.items);
+import { docsNavigation, allDocsPages } from "@/lib/docs-navigation";
 
 export function DocsMobileNav() {
   const [open, setOpen] = useState(false);
   const pathname = usePathname();
 
   const currentPage = useMemo(() => {
-    const page = allPages.find((page) => page.href === pathname);
-    return page ?? allPages[0];
+    const page = allDocsPages.find((page) => page.href === pathname);
+    return page ?? allDocsPages[0];
   }, [pathname]);
 
   return (
@@ -70,27 +32,49 @@ export function DocsMobileNav() {
       <SheetContent className="overflow-y-auto p-6">
         <SheetTitle className="mb-6">Table of Contents</SheetTitle>
         <nav className="space-y-6">
-          {navigation.map((section) => (
+          {docsNavigation.map((section) => (
             <div key={section.title}>
               <h4 className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-2">
                 {section.title}
               </h4>
               <ul className="space-y-1">
-                {section.items.map((item) => (
-                  <li key={item.href}>
-                    <Link
-                      href={item.href}
-                      onClick={() => setOpen(false)}
-                      className={`text-sm block py-2 transition-colors ${
-                        pathname === item.href
-                          ? "text-foreground font-medium"
-                          : "text-muted-foreground hover:text-foreground"
-                      }`}
-                    >
-                      {item.title}
-                    </Link>
-                  </li>
-                ))}
+                {section.items.map((item) => {
+                  const isExternal = item.external;
+                  return (
+                    <li key={item.href}>
+                      <Link
+                        href={item.href}
+                        onClick={() => setOpen(false)}
+                        {...(isExternal && {
+                          target: "_blank",
+                          rel: "noopener noreferrer",
+                        })}
+                        className={`text-sm block py-2 transition-colors ${
+                          pathname === item.href
+                            ? "text-primary font-medium"
+                            : "text-muted-foreground hover:text-foreground"
+                        } ${isExternal ? "inline-flex items-center gap-1" : ""}`}
+                      >
+                        {item.title}
+                        {isExternal && (
+                          <svg
+                            className="w-3 h-3"
+                            fill="none"
+                            stroke="currentColor"
+                            viewBox="0 0 24 24"
+                          >
+                            <path
+                              strokeLinecap="round"
+                              strokeLinejoin="round"
+                              strokeWidth={2}
+                              d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14"
+                            />
+                          </svg>
+                        )}
+                      </Link>
+                    </li>
+                  );
+                })}
               </ul>
             </div>
           ))}

apps/web/components/docs-sidebar.tsx

@@ -0,0 +1,63 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { cn } from "@/lib/utils";
+import { docsNavigation } from "@/lib/docs-navigation";
+
+export function DocsSidebar() {
+  const pathname = usePathname();
+
+  return (
+    <nav className="space-y-6 pb-8">
+      {docsNavigation.map((section) => (
+        <div key={section.title}>
+          <h4 className="text-xs font-normal text-muted-foreground/50 uppercase tracking-wider mb-2">
+            {section.title}
+          </h4>
+          <ul className="space-y-1">
+            {section.items.map((item) => {
+              const isActive = pathname === item.href;
+              const isExternal = item.external;
+              return (
+                <li key={item.href}>
+                  <Link
+                    href={item.href}
+                    {...(isExternal && {
+                      target: "_blank",
+                      rel: "noopener noreferrer",
+                    })}
+                    className={cn(
+                      "text-sm transition-colors block py-1",
+                      isActive
+                        ? "text-primary font-medium"
+                        : "text-muted-foreground hover:text-foreground",
+                      isExternal && "inline-flex items-center gap-1",
+                    )}
+                  >
+                    {item.title}
+                    {isExternal && (
+                      <svg
+                        className="w-3 h-3"
+                        fill="none"
+                        stroke="currentColor"
+                        viewBox="0 0 24 24"
+                      >
+                        <path
+                          strokeLinecap="round"
+                          strokeLinejoin="round"
+                          strokeWidth={2}
+                          d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14"
+                        />
+                      </svg>
+                    )}
+                  </Link>
+                </li>
+              );
+            })}
+          </ul>
+        </div>
+      ))}
+    </nav>
+  );
+}

apps/web/components/expandable-code.tsx

@@ -0,0 +1,48 @@
+"use client";
+
+import { useState, useRef, useEffect } from "react";
+
+interface ExpandableCodeProps {
+  children: React.ReactNode;
+  maxHeight?: number;
+}
+
+export function ExpandableCode({
+  children,
+  maxHeight = 300,
+}: ExpandableCodeProps) {
+  const [isExpanded, setIsExpanded] = useState(false);
+  const [needsExpansion, setNeedsExpansion] = useState(false);
+  const contentRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    if (contentRef.current) {
+      setNeedsExpansion(contentRef.current.scrollHeight > maxHeight);
+    }
+  }, [maxHeight]);
+
+  return (
+    <div className="relative">
+      <div
+        ref={contentRef}
+        className="overflow-hidden transition-[max-height] duration-300"
+        style={{
+          maxHeight: isExpanded || !needsExpansion ? "none" : maxHeight,
+        }}
+      >
+        {children}
+      </div>
+      {needsExpansion && !isExpanded && (
+        <>
+          <div className="absolute bottom-0 left-0 right-0 h-24 bg-gradient-to-t from-neutral-100 dark:from-[#0a0a0a] to-transparent pointer-events-none" />
+          <button
+            onClick={() => setIsExpanded(true)}
+            className="absolute bottom-3 left-1/2 -translate-x-1/2 px-3 py-1.5 text-xs font-medium text-muted-foreground bg-neutral-200 dark:bg-neutral-800 hover:bg-neutral-300 dark:hover:bg-neutral-700 rounded-md transition-colors"
+          >
+            Show all
+          </button>
+        </>
+      )}
+    </div>
+  );
+}

apps/web/components/footer.tsx

@@ -1,27 +0,0 @@
-import Link from "next/link";
-
-export function Footer() {
-  return (
-    <footer className="border-t border-border">
-      <div className="max-w-5xl mx-auto px-6 py-6 flex justify-between items-center text-sm text-muted-foreground">
-        <div>json-render</div>
-        <div className="flex gap-6">
-          <Link
-            href="/docs"
-            className="hover:text-foreground transition-colors"
-          >
-            Docs
-          </Link>
-          <a
-            href="https://github.com/vercel-labs/json-render"
-            target="_blank"
-            rel="noopener noreferrer"
-            className="hover:text-foreground transition-colors"
-          >
-            GitHub
-          </a>
-        </div>
-      </div>
-    </footer>
-  );
-}

apps/web/components/generation-modes-diagram.tsx

@@ -0,0 +1,115 @@
+"use client";
+
+function Skeleton({ className = "" }: { className?: string }) {
+  return <div className={`rounded bg-muted-foreground/10 ${className}`} />;
+}
+
+/** Simple form wireframe reused in both diagrams */
+function FormUI() {
+  return (
+    <div className="border border-border rounded-lg p-2.5 space-y-1.5 bg-muted/30">
+      {/* Title */}
+      <Skeleton className="h-2.5 w-14 mb-1" />
+      {/* Input fields */}
+      <Skeleton className="h-4 w-full rounded-sm" />
+      <Skeleton className="h-4 w-full rounded-sm" />
+      {/* Submit button */}
+      <Skeleton className="h-4 w-16 rounded-sm bg-muted-foreground/20 mt-1" />
+    </div>
+  );
+}
+
+function ChatModeDiagram() {
+  return (
+    <div className="flex flex-col h-full">
+      <div className="text-xs font-medium text-muted-foreground mb-3 text-center">
+        Chat Mode
+      </div>
+      <div className="flex-1 border border-border rounded-lg bg-background overflow-hidden flex flex-col">
+        {/* Chat area */}
+        <div className="flex-1 p-3 overflow-hidden flex justify-center">
+          <div className="w-1/3 min-w-[120px] space-y-3">
+            {/* User message */}
+            <div className="flex justify-end">
+              <div className="bg-muted rounded-xl px-3 py-2">
+                <Skeleton className="h-2 w-14" />
+              </div>
+            </div>
+
+            {/* Assistant text */}
+            <div className="space-y-2">
+              <div className="space-y-1.5">
+                <Skeleton className="h-2 w-full" />
+                <Skeleton className="h-2 w-3/4" />
+              </div>
+
+              {/* Inline UI */}
+              <FormUI />
+
+              {/* More text after UI */}
+              <div className="space-y-1.5">
+                <Skeleton className="h-2 w-4/5" />
+              </div>
+            </div>
+          </div>
+        </div>
+
+        {/* Input bar */}
+        <div className="p-2 flex justify-center">
+          <div className="w-1/3 min-w-[120px] flex items-center gap-2">
+            <Skeleton className="h-7 flex-1 rounded-md" />
+            <Skeleton className="h-7 w-7 rounded-md" />
+          </div>
+        </div>
+      </div>
+      <div className="text-[10px] text-muted-foreground/60 mt-2 text-center">
+        Text + UI interleaved in messages
+      </div>
+    </div>
+  );
+}
+
+function GenerateModeDiagram() {
+  return (
+    <div className="flex flex-col h-full">
+      <div className="text-xs font-medium text-muted-foreground mb-3 text-center">
+        Generate Mode
+      </div>
+      <div className="flex-1 border border-border rounded-lg bg-background overflow-hidden flex flex-row">
+        {/* Left panel - prompt */}
+        <div className="w-[38%] border-r border-border flex flex-col">
+          <div className="flex-1" />
+          <div className="p-3 space-y-2">
+            <Skeleton className="h-7 w-full rounded-md" />
+            <Skeleton className="h-5 w-16 rounded-md" />
+          </div>
+        </div>
+
+        {/* Right panel - UI preview */}
+        <div className="flex-1 p-3 flex items-center justify-center">
+          <div className="w-3/4">
+            <FormUI />
+          </div>
+        </div>
+      </div>
+      <div className="text-[10px] text-muted-foreground/60 mt-2 text-center">
+        Prompt separate from UI preview
+      </div>
+    </div>
+  );
+}
+
+export function GenerationModesDiagram() {
+  return (
+    <div className="not-prose my-8">
+      <div className="grid grid-cols-1 sm:grid-cols-2 gap-6">
+        <div className="h-[280px]">
+          <ChatModeDiagram />
+        </div>
+        <div className="h-[280px]">
+          <GenerateModeDiagram />
+        </div>
+      </div>
+    </div>
+  );
+}

apps/web/components/header.tsx

@@ -1,7 +1,23 @@
+"use client";
+
 import Link from "next/link";
+import { usePathname } from "next/navigation";
 import { ThemeToggle } from "./theme-toggle";
+import { cn } from "@/lib/utils";
 
 export function Header() {
+  const pathname = usePathname();
+
+  const isActive = (href: string) => {
+    if (href === "/playground") {
+      return pathname === "/playground";
+    }
+    if (href === "/docs") {
+      return pathname.startsWith("/docs");
+    }
+    return false;
+  };
+
   return (
     <header className="sticky top-0 z-50 bg-background">
       <div className="flex h-14 items-center justify-between px-4 gap-6">
@@ -49,13 +65,24 @@ export function Header() {
         <nav className="flex items-center gap-4">
           <Link
             href="/playground"
-            className="text-sm text-muted-foreground hover:text-foreground transition-colors"
+            className={cn(
+              "text-sm transition-colors",
+              isActive("/playground")
+                ? "text-primary font-medium"
+                : "text-muted-foreground hover:text-foreground",
+            )}
           >
-            Playground
+            <span className="sm:hidden">Play</span>
+            <span className="hidden sm:inline">Playground</span>
           </Link>
           <Link
             href="/docs"
-            className="text-sm text-muted-foreground hover:text-foreground transition-colors"
+            className={cn(
+              "text-sm transition-colors",
+              isActive("/docs")
+                ? "text-primary font-medium"
+                : "text-muted-foreground hover:text-foreground",
+            )}
           >
             Docs
           </Link>
@@ -63,9 +90,17 @@ export function Header() {
             href="https://github.com/vercel-labs/json-render"
             target="_blank"
             rel="noopener noreferrer"
-            className="text-sm text-muted-foreground hover:text-foreground transition-colors"
+            className="flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground transition-colors"
           >
-            GitHub
+            <svg
+              viewBox="0 0 16 16"
+              className="h-4 w-4"
+              fill="currentColor"
+              aria-hidden="true"
+            >
+              <path d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z" />
+            </svg>
+            <span>10.5k</span>
           </a>
           <ThemeToggle />
         </nav>