v0.17.0 (#269)

* improve output

* fixes

.changeset/README.md

@@ -1,13 +0,0 @@
-# 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

@@ -1,35 +0,0 @@
-{
-  "$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-email",
-      "@json-render/react-pdf",
-      "@json-render/shadcn",
-      "@json-render/react-native",
-      "@json-render/remotion",
-      "@json-render/codegen",
-      "@json-render/zustand",
-      "@json-render/redux",
-      "@json-render/jotai",
-      "@json-render/vue",
-      "@json-render/xstate",
-      "@json-render/image",
-      "@json-render/mcp",
-      "@json-render/svelte",
-      "@json-render/solid",
-      "@json-render/react-three-fiber"
-    ]
-  ],
-  "linked": [],
-  "access": "public",
-  "baseBranch": "main",
-  "updateInternalDependencies": "patch",
-  "privatePackages": {
-    "version": true,
-    "tag": false
-  }
-}

.github/workflows/ci.yml

@@ -13,34 +13,55 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  ci:
-    name: Lint, Type Check & Build
+  version-sync:
+    name: Version Sync Check
     runs-on: ubuntu-latest
-
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
-
+      - uses: actions/checkout@v4
       - name: Setup Node.js
         uses: actions/setup-node@v4
+        with:
+          node-version: 22
+      - name: Check version sync
+        run: node scripts/check-version-sync.js
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: 20
-          cache: "pnpm"
+          cache: pnpm
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm lint
 
-      - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+      - run: pnpm install --frozen-lockfile
+      - name: Build packages
+        run: pnpm turbo run build --filter='./packages/*'
+      - run: pnpm test
 
-      - name: Lint
-        run: pnpm lint
-
-      - name: Type check
-        run: pnpm type-check
-
-      - name: Test
-        run: pnpm test
-
-      - name: Build
-        run: pnpm build
+  typecheck:
+    name: Type Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: pnpm
+      - run: pnpm install --frozen-lockfile
+      - run: pnpm type-check

.github/workflows/release.yml

@@ -8,19 +8,62 @@ on:
 
 concurrency: ${{ github.workflow }}-${{ github.ref }}
 
-permissions:
-  contents: write
-  pull-requests: write
-
 jobs:
-  release:
-    name: Release
+  check-release:
+    name: Check for new version
     runs-on: ubuntu-latest
+    timeout-minutes: 5
+    permissions:
+      contents: read
+    outputs:
+      should_release: ${{ steps.check.outputs.should_release }}
+      needs_github_release: ${{ steps.check.outputs.needs_github_release }}
+      version: ${{ steps.check.outputs.version }}
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Compare package.json version to npm and check GitHub release
+        id: check
+        run: |
+          LOCAL_VERSION=$(node -p "require('./packages/core/package.json').version")
+          echo "Local version: $LOCAL_VERSION"
+
+          NPM_VERSION=$(npm view @json-render/core version 2>/dev/null || echo "0.0.0")
+          echo "npm version: $NPM_VERSION"
+
+          if [ "$LOCAL_VERSION" != "$NPM_VERSION" ]; then
+            echo "Version changed: $NPM_VERSION -> $LOCAL_VERSION"
+            echo "should_release=true" >> "$GITHUB_OUTPUT"
+            echo "needs_github_release=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "Version unchanged on npm, skipping build and publish"
+            echo "should_release=false" >> "$GITHUB_OUTPUT"
+
+            TAG="v$LOCAL_VERSION"
+            if gh release view "$TAG" &>/dev/null; then
+              echo "GitHub release $TAG exists"
+              echo "needs_github_release=false" >> "$GITHUB_OUTPUT"
+            else
+              echo "GitHub release $TAG is missing, will create it"
+              echo "needs_github_release=true" >> "$GITHUB_OUTPUT"
+            fi
+          fi
+          echo "version=$LOCAL_VERSION" >> "$GITHUB_OUTPUT"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  build:
+    name: Build
+    needs: check-release
+    if: needs.check-release.outputs.should_release == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    permissions:
+      contents: read
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
 
       - name: Install pnpm
         uses: pnpm/action-setup@v4
@@ -28,20 +71,87 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build packages
+        run: pnpm run build
+
+  publish:
+    name: Publish to npm
+    needs: [check-release, build]
+    if: needs.check-release.outputs.should_release == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
           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"
+      - name: Build packages
+        run: pnpm run build
+
+      - name: Publish all public packages
+        run: pnpm -r publish --no-git-checks --filter '@json-render/*'
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_VERCEL_TOKEN_ELEVATED }}
+
+  github-release:
+    name: Create GitHub Release
+    needs: [check-release, publish]
+    if: >-
+      always()
+      && needs.check-release.outputs.needs_github_release == 'true'
+      && (needs.publish.result == 'success' || needs.publish.result == 'skipped')
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Extract changelog entry
+        run: |
+          VERSION="${{ needs.check-release.outputs.version }}"
+          awk '/<!-- release:start -->/{found=1; next} /<!-- release:end -->/{found=0} found{print}' CHANGELOG.md > /tmp/release-notes.md
+
+          LINES=$(wc -l < /tmp/release-notes.md | tr -d ' ')
+          if [ "$LINES" -lt 2 ]; then
+            echo "Error: No release notes found between <!-- release:start --> and <!-- release:end --> markers in CHANGELOG.md"
+            exit 1
+          fi
+          echo "Extracted release notes for $VERSION ($LINES lines)"
+
+      - name: Create GitHub Release
+        run: |
+          VERSION="${{ needs.check-release.outputs.version }}"
+          TAG="v$VERSION"
+
+          if gh release view "$TAG" &>/dev/null; then
+            echo "Release $TAG already exists"
+          else
+            echo "Creating release $TAG..."
+            gh release create "$TAG" \
+              --title "$TAG" \
+              --notes-file /tmp/release-notes.md
+          fi
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_VERCEL_TOKEN_ELEVATED }}

.gitignore

@@ -29,6 +29,8 @@ build
 dist
 *.tsbuildinfo
 .svelte-kit/
+tsup.config.bundled_*.mjs
+next-env.d.ts
 
 
 # Debug

AGENTS.md

@@ -73,25 +73,20 @@ Do **not** add `--port` flags -- portless handles port assignment automatically.
   - Skills in `skills/*/SKILL.md` (if the package has a corresponding skill)
   - `AGENTS.md` (if workflow or conventions change)
 
-## Releases
+## Releasing
 
-This monorepo uses [Changesets](https://github.com/changesets/changesets) for versioning and publishing.
+Releases are manual, single-PR affairs. The maintainer controls the changelog voice and format.
 
-### Fixed version group
-
-All public `@json-render/*` packages are in a **fixed** group (see `.changeset/config.json`). A changeset that bumps any one of them bumps all of them to the same version. You only need to list the packages that actually changed in the changeset front matter — the fixed group handles the rest.
+All public `@json-render/*` packages share the same version. The canonical version lives in `packages/core/package.json`.
 
 ### Preparing a release
 
-When asked to prepare a release (e.g. "prepare v0.12.0"):
+When asked to prepare a release (e.g. "prepare v0.17.0"):
 
-1. **Create a changeset file** at `.changeset/v0-<N>-release.md` following the existing pattern:
-   - YAML front matter listing changed packages with bump type (`minor` for feature releases, `patch` for bug-fix-only releases)
-   - A one-line summary, then `### New:` / `### Improved:` / `### Fixed:` sections describing each change
-   - Always list `@json-render/core` plus any packages with actual code changes
-2. **Do NOT bump versions** in `package.json` files — CI runs `pnpm ci:version` (which calls `changeset version`) to do that automatically
-3. **Do NOT manually write `CHANGELOG.md`** entries — `changeset version` generates them from the changeset file
-4. **Add new packages to the fixed group** in `.changeset/config.json` if they should be versioned together with the rest
+1. Create a branch (e.g. `prepare-v0.17.0`)
+2. Bump the version in `packages/core/package.json`
+3. Run `pnpm run version:sync` to update all other `@json-render/*` packages
+4. Write the changelog entry in `CHANGELOG.md`, wrapped in `<!-- release:start -->` and `<!-- release:end -->` markers (move the markers from the previous entry to the new one)
 5. **Fill documentation gaps** — every public package should have:
    - A row in the root `README.md` packages table
    - A renderer section in the root `README.md` (if it's a renderer)
@@ -101,12 +96,15 @@ When asked to prepare a release (e.g. "prepare v0.12.0"):
    - A skill at `skills/<name>/SKILL.md`
    - A `packages/<name>/README.md`
 6. **Run `pnpm type-check`** after all changes to verify nothing is broken
+7. Open a PR and merge to `main`
 
-### CI scripts
+CI compares the `@json-render/core` version to what's on npm. If it differs, it builds, publishes all public packages, and creates the GitHub release automatically. The release body is extracted from the content between the markers.
 
-- `pnpm changeset` — interactively create a new changeset
-- `pnpm ci:version` — run `changeset version` + lockfile update (CI only)
-- `pnpm ci:publish` — build all packages and publish to npm (CI only)
+### Scripts
+
+- `pnpm run version:sync` — sync all `@json-render/*` package versions to match `@json-render/core`
+- `pnpm run version:check` — verify all versions are in sync (runs in CI)
+- `pnpm run ci:publish` — build all packages and publish to npm (CI only)
 
 <!-- opensrc:start -->
 

CHANGELOG.md

@@ -0,0 +1,26 @@
+# Changelog
+
+## 0.17.0
+
+<!-- release:start -->
+### New Features
+
+- **Gaussian Splatting** — Added `GaussianSplat` component to `@json-render/react-three-fiber`, bringing the component count to 20. Composable with all existing R3F components (lights, controls, post-processing) via drei's Splat loader (#259)
+- **Standalone gsplat example** — Experimental demo app showcasing Gaussian Splatting with gsplat.js (no Three.js dependency), featuring scene selector, live JSON spec viewer, and progress indicator (#259)
+- **R3F gsplat example** — Demo app with five scenes: splat showroom, splat with primitives, multi-splat, post-processing effects, and animated floating splat (#259)
+
+### Improved
+
+- **AI output quality** — Improved prompt output and schema generation for more reliable AI-generated specs (#268)
+
+### Contributors
+
+- @ctate
+- @willmanzoli
+<!-- release:end -->
+
+## 0.16.0
+
+### Improved
+
+- **Release process** — Switched from Changesets to a manual single-PR release workflow with changelog markers and automatic npm publish on version bump

README.md

@@ -23,7 +23,11 @@ npm install @json-render/core @json-render/vue
 npm install @json-render/core @json-render/svelte
 # or for SolidJS
 npm install @json-render/core @json-render/solid
-# or for 3D scenes
+# or for terminal UIs
+npm install @json-render/core @json-render/ink ink react
+# or for full Next.js apps (routes, layouts, SSR, metadata)
+npm install @json-render/core @json-render/react @json-render/next
+# or for 3D scenes (and gaussian splatting via the GaussianSplat component)
 npm install @json-render/core @json-render/react-three-fiber @react-three/fiber @react-three/drei three
 ```
 
@@ -123,11 +127,14 @@ function Dashboard({ spec }) {
 | `@json-render/svelte`       | Svelte 5 renderer with runes-based reactivity                          |
 | `@json-render/solid`        | SolidJS renderer with fine-grained reactive contexts                   |
 | `@json-render/shadcn`       | 36 pre-built shadcn/ui components (Radix UI + Tailwind CSS)            |
-| `@json-render/react-three-fiber` | React Three Fiber renderer for 3D scenes (19 built-in components)  |
+| `@json-render/shadcn-svelte`| 36 pre-built shadcn-svelte components (Svelte 5 + Tailwind CSS)        |
+| `@json-render/react-three-fiber` | React Three Fiber renderer for 3D scenes (20 built-in components, including GaussianSplat)  |
 | `@json-render/react-native` | React Native renderer with standard mobile components                  |
+| `@json-render/next`         | Next.js renderer — JSON becomes full apps with routes, layouts, SSR    |
 | `@json-render/remotion`     | Remotion video renderer, timeline schema                               |
 | `@json-render/react-pdf`    | React PDF renderer for generating PDF documents from specs             |
 | `@json-render/react-email`  | React Email renderer for HTML/plain-text emails from specs             |
+| `@json-render/ink`          | Ink terminal renderer with built-in components for interactive TUIs.   |
 | `@json-render/image`        | Image renderer for SVG/PNG output (OG images, social cards) via Satori |
 | `@json-render/codegen`      | Utilities for generating code from json-render UI trees                |
 | `@json-render/redux`        | Redux / Redux Toolkit adapter for `StateStore`                         |
@@ -135,6 +142,7 @@ function Dashboard({ spec }) {
 | `@json-render/jotai`        | Jotai adapter for `StateStore`                                         |
 | `@json-render/xstate`       | XState Store (atom) adapter for `StateStore`                           |
 | `@json-render/mcp`          | MCP Apps integration for Claude, ChatGPT, Cursor, VS Code              |
+| `@json-render/yaml`         | YAML wire format with streaming parser, edit modes, AI SDK transform   |
 
 ## Renderers
 
@@ -454,6 +462,7 @@ const catalog = defineCatalog(schema, {
     Sphere: threeComponentDefinitions.Sphere,
     AmbientLight: threeComponentDefinitions.AmbientLight,
     DirectionalLight: threeComponentDefinitions.DirectionalLight,
+    GaussianSplat: threeComponentDefinitions.GaussianSplat,
     OrbitControls: threeComponentDefinitions.OrbitControls,
   },
   actions: {},
@@ -465,6 +474,7 @@ const { registry } = defineRegistry(catalog, {
     Sphere: threeComponents.Sphere,
     AmbientLight: threeComponents.AmbientLight,
     DirectionalLight: threeComponents.DirectionalLight,
+    GaussianSplat: threeComponents.GaussianSplat,
     OrbitControls: threeComponents.OrbitControls,
   },
 });
@@ -478,6 +488,121 @@ const { registry } = defineRegistry(catalog, {
 />;
 ```
 
+### Next.js (Full Apps)
+
+```typescript
+import type { NextAppSpec } from "@json-render/next";
+import { createNextApp } from "@json-render/next/server";
+import { NextAppProvider } from "@json-render/next";
+
+const spec: NextAppSpec = {
+  metadata: { title: { default: "My App", template: "%s | My App" } },
+  layouts: {
+    main: {
+      root: "shell",
+      elements: {
+        shell: { type: "Container", props: {}, children: ["nav", "slot"] },
+        nav: { type: "NavBar", props: {}, children: [] },
+        slot: { type: "Slot", props: {}, children: [] },
+      },
+    },
+  },
+  routes: {
+    "/": {
+      layout: "main",
+      metadata: { title: "Home" },
+      page: {
+        root: "hero",
+        elements: {
+          hero: { type: "Card", props: { title: "Welcome" }, children: [] },
+        },
+      },
+    },
+  },
+};
+
+// Server: creates Page, generateMetadata, generateStaticParams
+const app = createNextApp({ spec });
+
+// Client: wrap your layout with NextAppProvider
+// <NextAppProvider registry={registry} handlers={handlers}>
+//   {children}
+// </NextAppProvider>
+```
+
+### shadcn-svelte (Svelte)
+
+```typescript
+import { defineCatalog } from "@json-render/core";
+import { schema } from "@json-render/svelte/schema";
+import { defineRegistry, Renderer } from "@json-render/svelte";
+import { shadcnComponentDefinitions } from "@json-render/shadcn-svelte/catalog";
+import { shadcnComponents } from "@json-render/shadcn-svelte";
+
+const catalog = defineCatalog(schema, {
+  components: {
+    Card: shadcnComponentDefinitions.Card,
+    Stack: shadcnComponentDefinitions.Stack,
+    Heading: shadcnComponentDefinitions.Heading,
+    Button: shadcnComponentDefinitions.Button,
+  },
+  actions: {},
+});
+
+const { registry } = defineRegistry(catalog, {
+  components: {
+    Card: shadcnComponents.Card,
+    Stack: shadcnComponents.Stack,
+    Heading: shadcnComponents.Heading,
+    Button: shadcnComponents.Button,
+  },
+});
+
+// In your Svelte component:
+// <Renderer spec={spec} registry={registry} />
+```
+
+### Ink (Terminal)
+
+```tsx
+import { defineCatalog } from "@json-render/core";
+import {
+  schema,
+  standardComponentDefinitions,
+  standardActionDefinitions,
+  defineRegistry,
+  Renderer,
+  JSONUIProvider,
+} from "@json-render/ink";
+
+const catalog = defineCatalog(schema, {
+  components: { ...standardComponentDefinitions },
+  actions: standardActionDefinitions,
+});
+
+const { registry } = defineRegistry(catalog, { components: {} });
+
+const spec = {
+  root: "card-1",
+  elements: {
+    "card-1": {
+      type: "Card",
+      props: { title: "Status" },
+      children: ["status-1"],
+    },
+    "status-1": {
+      type: "StatusLine",
+      props: { label: "Build", status: "success" },
+      children: [],
+    },
+  },
+};
+
+<JSONUIProvider initialState={{}}>
+  <Renderer spec={spec} registry={registry} />
+</JSONUIProvider>;
+```
+
 ## Features
 
 ### Streaming (SpecStream)
@@ -607,6 +732,8 @@ pnpm dev
 - Vue Example: run `pnpm dev` in `examples/vue`
 - Vite Renderers (React + Vue + Svelte + Solid): run `pnpm dev` in `examples/vite-renderers`
 - React Native example: run `npx expo start` in `examples/react-native`
+- Gaussian Splatting (R3F): run `pnpm dev` in `examples/react-three-fiber-gsplat`
+- Gaussian Splatting (experimental standalone gsplat.js demo): run `pnpm dev` in `examples/gsplat`
 
 ## How It Works
 

apps/web/CHANGELOG.md

@@ -1,5 +1,45 @@
 # web
 
+## 0.1.11
+
+### Patch Changes
+
+- Updated dependencies [519a538]
+  - @json-render/core@0.16.0
+  - @json-render/codegen@0.16.0
+  - @json-render/react@0.16.0
+  - @json-render/yaml@0.16.0
+
+## 0.1.10
+
+### Patch Changes
+
+- Updated dependencies [bf3a7ec]
+  - @json-render/core@0.15.0
+  - @json-render/codegen@0.15.0
+  - @json-render/react@0.15.0
+  - @json-render/yaml@0.15.0
+
+## 0.1.9
+
+### Patch Changes
+
+- Updated dependencies [43b7515]
+  - @json-render/core@0.14.1
+  - @json-render/codegen@0.14.1
+  - @json-render/react@0.14.1
+  - @json-render/yaml@0.14.1
+
+## 0.1.8
+
+### Patch Changes
+
+- Updated dependencies [a8afd8b]
+  - @json-render/core@0.14.0
+  - @json-render/yaml@0.14.0
+  - @json-render/codegen@0.14.0
+  - @json-render/react@0.14.0
+
 ## 0.1.7
 
 ### Patch Changes

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

@@ -76,6 +76,7 @@ interface PromptOptions {
   system?: string;           // Custom system message intro
   customRules?: string[];    // Additional rules to append
   mode?: "standalone" | "inline" | "generate" | "chat"; // Output mode (default: "standalone")
+  editModes?: EditMode[];    // Edit modes to document in prompt (default: ["patch"])
 }
 
 interface SpecValidationResult<T> {
@@ -480,9 +481,10 @@ 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)
+  currentSpec?: Spec | null;             // Existing spec to refine (triggers edit mode)
   state?: Record<string, unknown> | null; // Runtime state context to include
   maxPromptLength?: number;              // Max length for user text (truncates before wrapping)
+  editModes?: EditMode[];                // Edit modes for refinement (default: ["patch"])
 }
 ```
 
@@ -492,14 +494,15 @@ interface UserPromptOptions {
 const userPrompt = buildUserPrompt({ prompt: "create a todo app" });
 ```
 
-### Refinement (patch-only mode)
+### Refinement (edit modes)
 
-When `currentSpec` is provided, the prompt instructs the AI to output only the patches needed for the change, not recreate the entire spec:
+When `currentSpec` is provided, the prompt instructs the AI to use the specified edit modes instead of recreating the entire spec. Available modes: `"patch"` (RFC 6902), `"merge"` (RFC 7396), and `"diff"` (unified diff).
 
 ```typescript
 const userPrompt = buildUserPrompt({
   prompt: "add a dark mode toggle",
   currentSpec: existingSpec,
+  editModes: ["patch", "merge"],
 });
 ```
 
@@ -514,6 +517,93 @@ const userPrompt = buildUserPrompt({
 });
 ```
 
+## Edit Modes
+
+Universal edit mode utilities for modifying existing specs. Used by `buildUserPrompt` internally and available for direct use.
+
+```typescript
+import {
+  buildEditInstructions,
+  buildEditUserPrompt,
+  isNonEmptySpec,
+  type EditMode,
+  type EditConfig,
+} from '@json-render/core';
+
+type EditMode = "patch" | "merge" | "diff";
+```
+
+### buildEditInstructions
+
+Generate the prompt section describing available edit modes. Supports both JSON and YAML formats.
+
+```typescript
+function buildEditInstructions(config: EditConfig, format: "json" | "yaml"): string
+
+const instructions = buildEditInstructions({ modes: ["patch", "merge"] }, "json");
+```
+
+### buildEditUserPrompt
+
+Build a user prompt for editing an existing spec. Includes the current spec (with line numbers when diff mode is enabled) and mode-specific instructions.
+
+```typescript
+function buildEditUserPrompt(options: BuildEditUserPromptOptions): string
+
+interface BuildEditUserPromptOptions {
+  prompt: string;
+  currentSpec?: Spec | null;
+  config?: EditConfig;
+  format: "json" | "yaml";
+  maxPromptLength?: number;
+  serializer?: (spec: Spec) => string;
+}
+```
+
+### isNonEmptySpec
+
+Check whether a value is a non-empty spec (has a root string and at least one element).
+
+```typescript
+function isNonEmptySpec(spec: unknown): spec is Spec
+```
+
+## Deep Merge and Diff
+
+Format-agnostic utilities for merging and diffing spec objects.
+
+### deepMergeSpec
+
+Deep-merge with RFC 7396 semantics: `null` deletes, arrays replace, objects recurse. Neither input is mutated.
+
+```typescript
+import { deepMergeSpec } from '@json-render/core';
+
+function deepMergeSpec(
+  base: Record<string, unknown>,
+  patch: Record<string, unknown>
+): Record<string, unknown>
+
+const merged = deepMergeSpec(currentSpec, { elements: { main: { props: { title: "New" } } } });
+```
+
+### diffToPatches
+
+Generate RFC 6902 JSON Patch operations that transform one object into another. Arrays are compared shallowly and replaced atomically; plain objects recurse.
+
+```typescript
+import { diffToPatches } from '@json-render/core';
+
+function diffToPatches(
+  oldObj: Record<string, unknown>,
+  newObj: Record<string, unknown>,
+  basePath?: string
+): JsonPatch[]
+
+const patches = diffToPatches(oldSpec, newSpec);
+// [{ op: "replace", path: "/elements/main/props/title", value: "New Title" }]
+```
+
 ## evaluateVisibility
 
 Evaluates a visibility condition against the state model.

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

@@ -0,0 +1,293 @@
+import { pageMetadata } from "@/lib/page-metadata"
+export const metadata = pageMetadata("docs/api/ink")
+
+# @json-render/ink
+
+Terminal renderer for [Ink](https://github.com/vadimdemedes/ink) with multiple standard components, providers, hooks, and streaming support.
+
+## Installation
+
+<PackageInstall packages="@json-render/core @json-render/ink" />
+
+Peer dependencies: `react ^18.0.0 || ^19.0.0`, `ink ^6.0.0`, and `zod ^4.0.0`.
+
+<PackageInstall packages="react ink zod" />
+
+## Standard Components
+
+### Layout
+
+<table>
+<thead>
+<tr><th>Component</th><th>Props</th><th>Description</th></tr>
+</thead>
+<tbody>
+<tr><td><code>Box</code></td><td><code>flexDirection</code>, <code>alignItems</code>, <code>justifyContent</code>, <code>gap</code>, <code>padding</code>, <code>margin</code>, <code>borderStyle</code>, <code>borderColor</code>, <code>width</code>, <code>height</code>, <code>display</code>, <code>overflow</code></td><td>Flexbox layout container (like a terminal div)</td></tr>
+<tr><td><code>Spacer</code></td><td>(none)</td><td>Flexible empty space that expands to fill available room</td></tr>
+<tr><td><code>Newline</code></td><td><code>count</code></td><td>Insert blank lines</td></tr>
+</tbody>
+</table>
+
+### Content
+
+<table>
+<thead>
+<tr><th>Component</th><th>Props</th><th>Description</th></tr>
+</thead>
+<tbody>
+<tr><td><code>Text</code></td><td><code>text</code>, <code>color</code>, <code>bold</code>, <code>italic</code>, <code>underline</code>, <code>strikethrough</code>, <code>dimColor</code>, <code>inverse</code>, <code>wrap</code></td><td>Text output with styling</td></tr>
+<tr><td><code>Heading</code></td><td><code>text</code>, <code>level</code> (h1-h4), <code>color</code></td><td>Section heading</td></tr>
+<tr><td><code>Divider</code></td><td><code>character</code>, <code>color</code>, <code>dimColor</code>, <code>title</code>, <code>width</code></td><td>Horizontal separator line with optional title</td></tr>
+<tr><td><code>Badge</code></td><td><code>label</code>, <code>variant</code></td><td>Colored inline label (default, info, success, warning, error)</td></tr>
+<tr><td><code>Spinner</code></td><td><code>label</code>, <code>color</code></td><td>Animated loading spinner</td></tr>
+<tr><td><code>ProgressBar</code></td><td><code>progress</code> (0-1), <code>width</code>, <code>color</code>, <code>label</code></td><td>Horizontal progress bar</td></tr>
+<tr><td><code>StatusLine</code></td><td><code>text</code>, <code>status</code>, <code>icon</code></td><td>Status message with colored icon</td></tr>
+<tr><td><code>KeyValue</code></td><td><code>label</code>, <code>value</code>, <code>labelColor</code>, <code>separator</code></td><td>Key-value pair display</td></tr>
+<tr><td><code>Link</code></td><td><code>url</code>, <code>label</code>, <code>color</code></td><td>Renders a URL as underlined text. Shows "label (url)" when label is provided.</td></tr>
+<tr><td><code>Markdown</code></td><td><code>text</code></td><td>Renders markdown with terminal styling (headings, bold, italic, code, lists, blockquotes, horizontal rules)</td></tr>
+</tbody>
+</table>
+
+### Data
+
+<table>
+<thead>
+<tr><th>Component</th><th>Props</th><th>Description</th></tr>
+</thead>
+<tbody>
+<tr><td><code>Table</code></td><td><code>columns</code>, <code>rows</code>, <code>borderStyle</code>, <code>headerColor</code></td><td>Tabular data with headers</td></tr>
+<tr><td><code>List</code></td><td><code>items</code>, <code>ordered</code>, <code>bulletChar</code>, <code>spacing</code></td><td>Bulleted or numbered list</td></tr>
+<tr><td><code>ListItem</code></td><td><code>title</code>, <code>subtitle</code>, <code>leading</code>, <code>trailing</code></td><td>Structured list row</td></tr>
+<tr><td><code>Card</code></td><td><code>title</code>, <code>borderStyle</code>, <code>borderColor</code>, <code>padding</code></td><td>Bordered container with optional title</td></tr>
+<tr><td><code>Sparkline</code></td><td><code>data</code>, <code>width</code>, <code>color</code>, <code>label</code>, <code>min</code>, <code>max</code></td><td>Inline sparkline chart using Unicode blocks (▁▂▃▄▅▆▇█)</td></tr>
+<tr><td><code>BarChart</code></td><td><code>data</code> (label/value/color), <code>width</code>, <code>showValues</code>, <code>showPercentage</code></td><td>Horizontal bar chart for comparing values</td></tr>
+</tbody>
+</table>
+
+### Interactive
+
+<table>
+<thead>
+<tr><th>Component</th><th>Props</th><th>Description</th></tr>
+</thead>
+<tbody>
+<tr><td><code>TextInput</code></td><td><code>placeholder</code>, <code>value</code> (use <code>$bindState</code>), <code>label</code>, <code>mask</code></td><td>Text input field. Press Enter to submit.</td></tr>
+<tr><td><code>Select</code></td><td><code>options</code>, <code>value</code> (use <code>$bindState</code>), <code>label</code></td><td>Arrow-key selection menu</td></tr>
+<tr><td><code>MultiSelect</code></td><td><code>options</code>, <code>value</code> (use <code>$bindState</code>), <code>label</code>, <code>min</code>, <code>max</code></td><td>Multi-selection menu. Space to toggle, Enter to confirm.</td></tr>
+<tr><td><code>ConfirmInput</code></td><td><code>message</code>, <code>defaultValue</code>, <code>yesLabel</code>, <code>noLabel</code></td><td>Yes/No confirmation prompt. Press Y or N.</td></tr>
+<tr><td><code>Tabs</code></td><td><code>tabs</code>, <code>value</code> (use <code>$bindState</code>), <code>color</code></td><td>Tab bar navigation with left/right arrow keys. Place child content inside with visible conditions.</td></tr>
+</tbody>
+</table>
+
+## Providers
+
+### JSONUIProvider
+
+Convenience wrapper around all providers: `StateProvider` → `VisibilityProvider` → `ValidationProvider` → `ActionProvider` → `FocusProvider`.
+
+```tsx
+import { JSONUIProvider, Renderer } from "@json-render/ink";
+
+<JSONUIProvider initialState={{}} handlers={handlers}>
+  <Renderer spec={spec} registry={registry} />
+</JSONUIProvider>
+```
+
+### StateProvider
+
+```tsx
+<StateProvider initialState={object} onStateChange={fn}>
+  {children}
+</StateProvider>
+```
+
+<table>
+<thead>
+<tr><th>Prop</th><th>Type</th><th>Description</th></tr>
+</thead>
+<tbody>
+<tr><td><code>store</code></td><td><code>StateStore</code></td><td>External store (controlled mode). When provided, <code>initialState</code> and <code>onStateChange</code> are ignored.</td></tr>
+<tr><td><code>initialState</code></td><td><code>Record&lt;string, unknown&gt;</code></td><td>Initial state model (uncontrolled mode).</td></tr>
+<tr><td><code>onStateChange</code></td><td><code>{'(changes: Array<{ path: string; value: unknown }>) => void'}</code></td><td>Callback when state changes (uncontrolled mode).</td></tr>
+</tbody>
+</table>
+
+#### External Store (Controlled Mode)
+
+Pass a `StateStore` to bypass internal state and wire json-render to any state management:
+
+```tsx
+import { createStateStore } from "@json-render/ink";
+
+const store = createStateStore({ count: 0 });
+
+<StateProvider store={store}>
+  {children}
+</StateProvider>
+
+// Mutate from anywhere — components re-render automatically:
+store.set("/count", 1);
+```
+
+The `store` prop is also available on `JSONUIProvider` and `createRenderer`.
+
+### ActionProvider
+
+```tsx
+<ActionProvider handlers={Record<string, ActionHandler>} navigate={fn}>
+  {children}
+</ActionProvider>
+```
+
+Built-in actions: `setState`, `pushState`, `removeState`, `log`, `exit`. Custom handlers override built-ins. Includes a terminal confirmation dialog (press Y/N) for actions with `confirm`.
+
+### VisibilityProvider
+
+```tsx
+<VisibilityProvider>
+  {children}
+</VisibilityProvider>
+```
+
+### ValidationProvider
+
+```tsx
+<ValidationProvider>
+  {children}
+</ValidationProvider>
+```
+
+### FocusProvider
+
+```tsx
+<FocusProvider>
+  {children}
+</FocusProvider>
+```
+
+Manages Tab-cycling focus between interactive components (TextInput, Select). Supports `useFocusDisable` to suppress cycling during modal dialogs.
+
+## defineRegistry
+
+Create a type-safe component registry. Standard components are built-in; only register custom components.
+
+```tsx
+import { defineRegistry, type Components } from "@json-render/ink";
+
+const { registry, handlers, executeAction } = defineRegistry(catalog, {
+  components: {
+    MyWidget: ({ props }) => <Text>{props.label}</Text>,
+  } as Components<typeof catalog>,
+  actions: {
+    submit: async (params, setState, state) => {
+      // custom action logic
+    },
+  },
+});
+```
+
+`handlers` is designed for `JSONUIProvider`/`ActionProvider`. `executeAction` is an imperative helper.
+
+## createRenderer
+
+Higher-level helper that wraps `Renderer` + all providers into a single component.
+
+```tsx
+import { createRenderer } from "@json-render/ink";
+
+const UIRenderer = createRenderer(catalog, components);
+
+<UIRenderer spec={spec} state={initialState} />;
+```
+
+## 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>
+  stop,         // () => void - abort the current stream
+  clear,        // () => void - reset spec and error
+} = useUIStream({
+  api: string,
+  onComplete?: (spec: Spec) => void,
+  onError?: (error: Error) => void,
+  fetch?: (url: string, init?: RequestInit) => Promise<Response>,
+  validate?: boolean,
+  maxRetries?: number,
+});
+```
+
+### useStateStore
+
+```typescript
+const { state, get, set, update } = useStateStore();
+```
+
+### useStateValue
+
+```typescript
+const value = useStateValue(path: string);
+```
+
+### useBoundProp
+
+```typescript
+const [value, setValue] = useBoundProp(resolvedValue, bindingPath);
+```
+
+### useActions
+
+```typescript
+const { execute } = useActions();
+```
+
+### useIsVisible
+
+```typescript
+const isVisible = useIsVisible(condition?: VisibilityCondition);
+```
+
+### useFocus
+
+```typescript
+const { isActive, id } = useFocus();
+```
+
+### useFocusDisable
+
+```typescript
+useFocusDisable(disabled: boolean);
+```
+
+Suppresses Tab-cycling while `disabled` is true (e.g., during a modal dialog).
+
+## Catalog Exports
+
+```typescript
+import { standardComponentDefinitions, standardActionDefinitions } from "@json-render/ink/catalog";
+import { schema } from "@json-render/ink/schema";
+```
+
+<table>
+<thead>
+<tr><th>Export</th><th>Purpose</th></tr>
+</thead>
+<tbody>
+<tr><td><code>standardComponentDefinitions</code></td><td>Catalog definitions for all 19 standard components</td></tr>
+<tr><td><code>standardActionDefinitions</code></td><td>Catalog definitions for standard actions (setState, pushState, removeState, log, exit)</td></tr>
+<tr><td><code>schema</code></td><td>Ink element tree schema</td></tr>
+</tbody>
+</table>
+
+## Server Export
+
+```typescript
+import { schema, standardComponentDefinitions, standardActionDefinitions } from "@json-render/ink/server";
+```
+
+Re-exports the schema and catalog definitions for server-side usage (e.g., building system prompts).

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

@@ -0,0 +1,280 @@
+import { pageMetadata } from "@/lib/page-metadata"
+export const metadata = pageMetadata("docs/api/next")
+
+# @json-render/next
+
+Next.js renderer. JSON becomes full Next.js applications with routes, layouts, metadata, and SSR.
+
+## Installation
+
+```bash
+npm install @json-render/core @json-render/react @json-render/next
+```
+
+## schema
+
+The Next.js app schema for multi-page specs. Use with `defineCatalog` from core.
+
+```typescript
+import { defineCatalog } from '@json-render/core';
+import { schema } from '@json-render/next/server';
+import { z } from 'zod';
+
+const catalog = defineCatalog(schema, {
+  components: {
+    Card: {
+      props: z.object({ title: z.string() }),
+      description: 'Card container',
+    },
+    NavBar: {
+      props: z.object({ links: z.array(z.object({ href: z.string(), label: z.string() })) }),
+      description: 'Navigation bar',
+    },
+  },
+  actions: {},
+});
+```
+
+## createNextApp
+
+Create all exports needed for a Next.js `[[...slug]]` catch-all route.
+
+```typescript
+import { createNextApp } from '@json-render/next/server';
+
+const { Page, generateMetadata, generateStaticParams } = createNextApp({
+  spec: myAppSpec,
+  loaders: {
+    loadPost: async ({ slug }) => {
+      const post = await db.post.findUnique({ where: { slug } });
+      return { post };
+    },
+  },
+});
+```
+
+### Options
+
+<table>
+  <thead>
+    <tr>
+      <th>Option</th>
+      <th>Type</th>
+      <th>Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><code>spec</code></td>
+      <td><code>{'NextAppSpec | (() => NextAppSpec | Promise<NextAppSpec>)'}</code></td>
+      <td>The application spec (static or dynamic)</td>
+    </tr>
+    <tr>
+      <td><code>loaders</code></td>
+      <td><code>{'Record<string, LoaderFn>'}</code></td>
+      <td>Server-side data loaders keyed by name</td>
+    </tr>
+  </tbody>
+</table>
+
+### Returns
+
+<table>
+  <thead>
+    <tr>
+      <th>Export</th>
+      <th>Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><code>Page</code></td>
+      <td>Async Server Component for <code>page.tsx</code></td>
+    </tr>
+    <tr>
+      <td><code>generateMetadata</code></td>
+      <td>Metadata generator for Next.js SEO</td>
+    </tr>
+    <tr>
+      <td><code>generateStaticParams</code></td>
+      <td>Static params for pre-rendering at build time</td>
+    </tr>
+  </tbody>
+</table>
+
+## NextAppSpec
+
+The top-level spec defining an entire Next.js application.
+
+```typescript
+interface NextAppSpec {
+  metadata?: NextMetadata;
+  routes: Record<string, NextRouteSpec>;
+  layouts?: Record<string, Spec>;
+  state?: Record<string, unknown>;
+}
+```
+
+### Route Patterns
+
+Routes use Next.js URL conventions:
+
+<table>
+  <thead>
+    <tr>
+      <th>Pattern</th>
+      <th>Example Match</th>
+      <th>Params</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><code>/</code></td>
+      <td><code>/</code></td>
+      <td><code>{'{}'}</code></td>
+    </tr>
+    <tr>
+      <td><code>/about</code></td>
+      <td><code>/about</code></td>
+      <td><code>{'{}'}</code></td>
+    </tr>
+    <tr>
+      <td><code>/blog/[slug]</code></td>
+      <td><code>/blog/hello</code></td>
+      <td><code>{'{ slug: "hello" }'}</code></td>
+    </tr>
+    <tr>
+      <td><code>/docs/[...path]</code></td>
+      <td><code>/docs/a/b/c</code></td>
+      <td><code>{'{ path: ["a","b","c"] }'}</code></td>
+    </tr>
+    <tr>
+      <td><code>/app/[[...path]]</code></td>
+      <td><code>/app</code> or <code>/app/x/y</code></td>
+      <td><code>{'{ path: [] }'}</code> or <code>{'{ path: ["x","y"] }'}</code></td>
+    </tr>
+  </tbody>
+</table>
+
+## NextAppProvider
+
+Client component that provides the component registry and action handlers to all pages.
+
+```tsx
+import { NextAppProvider } from '@json-render/next';
+
+export default function Layout({ children }) {
+  return (
+    <NextAppProvider registry={registry} handlers={handlers}>
+      {children}
+    </NextAppProvider>
+  );
+}
+```
+
+## Built-in Components
+
+### Slot
+
+Placeholder in layouts where page content is rendered. Every layout MUST include a Slot.
+
+```json
+{ "type": "Slot", "props": {}, "children": [] }
+```
+
+### Link
+
+Client-side navigation wrapping `next/link`.
+
+```json
+{ "type": "Link", "props": { "href": "/about" }, "children": ["link-text"] }
+```
+
+## Built-in Actions
+
+<table>
+  <thead>
+    <tr>
+      <th>Action</th>
+      <th>Params</th>
+      <th>Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><code>setState</code></td>
+      <td><code>{'{ statePath, value }'}</code></td>
+      <td>Update a value in state</td>
+    </tr>
+    <tr>
+      <td><code>pushState</code></td>
+      <td><code>{'{ statePath, value, clearStatePath? }'}</code></td>
+      <td>Append to array in state</td>
+    </tr>
+    <tr>
+      <td><code>removeState</code></td>
+      <td><code>{'{ statePath, index }'}</code></td>
+      <td>Remove from array by index</td>
+    </tr>
+    <tr>
+      <td><code>navigate</code></td>
+      <td><code>{'{ href }'}</code></td>
+      <td>Client-side navigation</td>
+    </tr>
+  </tbody>
+</table>
+
+## Server Utilities
+
+### matchRoute
+
+Match a pathname against a spec's routes.
+
+```typescript
+import { matchRoute } from '@json-render/next/server';
+
+const matched = matchRoute(spec, '/blog/hello-world');
+// { route: NextRouteSpec, pattern: '/blog/[slug]', params: { slug: 'hello-world' } }
+```
+
+### resolveMetadata
+
+Resolve merged metadata for a route.
+
+```typescript
+import { resolveMetadata } from '@json-render/next/server';
+
+const metadata = resolveMetadata(spec, matchedRoute?.route);
+```
+
+### slugToPath
+
+Convert catch-all slug array to pathname.
+
+```typescript
+import { slugToPath } from '@json-render/next/server';
+
+slugToPath(undefined);          // "/"
+slugToPath(['blog', 'hello']);  // "/blog/hello"
+```
+
+## Entry Points
+
+<table>
+  <thead>
+    <tr>
+      <th>Import</th>
+      <th>Contents</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><code>@json-render/next</code></td>
+      <td>Client components (NextAppProvider, PageRenderer, Link)</td>
+    </tr>
+    <tr>
+      <td><code>@json-render/next/server</code></td>
+      <td>Server utilities (createNextApp, matchRoute, schema)</td>
+    </tr>
+  </tbody>
+</table>

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

@@ -3,7 +3,7 @@ export const metadata = pageMetadata("docs/api/react-three-fiber")
 
 # @json-render/react-three-fiber
 
-React Three Fiber renderer for json-render. 19 built-in 3D components for meshes, lights, models, environments, text, cameras, and controls.
+React Three Fiber renderer for json-render. 20 built-in 3D components for meshes, lights, models, gaussian splats, environments, text, cameras, and controls.
 
 ## Installation
 
@@ -283,6 +283,11 @@ All primitives share: <code>position</code>, <code>rotation</code>, <code>scale<
 <td>Camera controls</td>
 <td><code>enableDamping</code>, <code>enableZoom</code>, <code>autoRotate</code></td>
 </tr>
+<tr>
+<td><code>GaussianSplat</code></td>
+<td>Gaussian splat (.splat/.ply) loader</td>
+<td><code>src</code>, <code>position</code>, <code>rotation</code>, <code>scale</code>, <code>alphaHash</code>, <code>toneMapped</code></td>
+</tr>
 </tbody>
 </table>
 

apps/web/app/(main)/docs/api/shadcn-svelte/page.mdx

@@ -0,0 +1,320 @@
+import { pageMetadata } from "@/lib/page-metadata"
+export const metadata = pageMetadata("docs/api/shadcn-svelte")
+
+# @json-render/shadcn-svelte
+
+Pre-built [shadcn-svelte](https://www.shadcn-svelte.com/) components for json-render. 36 components built on Svelte 5 + Tailwind CSS, ready to use with `defineCatalog` and `defineRegistry`.
+
+## Installation
+
+```bash
+npm install @json-render/shadcn-svelte @json-render/core @json-render/svelte zod
+```
+
+Your app must have Tailwind CSS configured.
+
+## Entry Points
+
+<table>
+<thead>
+<tr>
+<th>Entry Point</th>
+<th>Exports</th>
+<th>Use For</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><code>@json-render/shadcn-svelte</code></td>
+<td><code>shadcnComponents</code>, <code>shadcnComponentDefinitions</code></td>
+<td>Svelte implementations + catalog schemas</td>
+</tr>
+<tr>
+<td><code>@json-render/shadcn-svelte/catalog</code></td>
+<td><code>shadcnComponentDefinitions</code></td>
+<td>Catalog schemas only (no Svelte dependency, safe for server)</td>
+</tr>
+</tbody>
+</table>
+
+## Usage
+
+Pick the components you need from the standard definitions:
+
+```typescript
+import { defineCatalog } from "@json-render/core";
+import { schema } from "@json-render/svelte/schema";
+import { shadcnComponentDefinitions } from "@json-render/shadcn-svelte/catalog";
+import { defineRegistry } from "@json-render/svelte";
+import { shadcnComponents } from "@json-render/shadcn-svelte";
+
+// Catalog: pick definitions
+const catalog = defineCatalog(schema, {
+  components: {
+    Card: shadcnComponentDefinitions.Card,
+    Stack: shadcnComponentDefinitions.Stack,
+    Heading: shadcnComponentDefinitions.Heading,
+    Button: shadcnComponentDefinitions.Button,
+    Input: shadcnComponentDefinitions.Input,
+  },
+  actions: {},
+});
+
+// Registry: pick matching implementations
+const { registry } = defineRegistry(catalog, {
+  components: {
+    Card: shadcnComponents.Card,
+    Stack: shadcnComponents.Stack,
+    Heading: shadcnComponents.Heading,
+    Button: shadcnComponents.Button,
+    Input: shadcnComponents.Input,
+  },
+});
+```
+
+Then render in your Svelte component:
+
+```svelte
+<script lang="ts">
+  import { Renderer, JsonUIProvider } from "@json-render/svelte";
+
+  export let spec;
+  export let registry;
+</script>
+
+<JsonUIProvider initialState={spec?.state ?? {}}>
+  <Renderer {spec} {registry} />
+</JsonUIProvider>
+```
+
+## Available Components
+
+### Layout
+
+<table>
+<thead>
+<tr>
+<th>Component</th>
+<th>Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><code>Card</code></td>
+<td>Container card with optional title, description, maxWidth, centered</td>
+</tr>
+<tr>
+<td><code>Stack</code></td>
+<td>Flex container with direction, gap, align, justify</td>
+</tr>
+<tr>
+<td><code>Grid</code></td>
+<td>Grid layout with columns (1-6) and gap</td>
+</tr>
+<tr>
+<td><code>Separator</code></td>
+<td>Visual separator line with orientation</td>
+</tr>
+</tbody>
+</table>
+
+### Navigation
+
+<table>
+<thead>
+<tr>
+<th>Component</th>
+<th>Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><code>Tabs</code></td>
+<td>Tabbed navigation with tabs array, defaultValue, value</td>
+</tr>
+<tr>
+<td><code>Accordion</code></td>
+<td>Collapsible sections with items array and type (single/multiple)</td>
+</tr>
+<tr>
+<td><code>Collapsible</code></td>
+<td>Single collapsible section with title and defaultOpen</td>
+</tr>
+<tr>
+<td><code>Pagination</code></td>
+<td>Page navigation with totalPages and page</td>
+</tr>
+</tbody>
+</table>
+
+### Overlay
+
+<table>
+<thead>
+<tr>
+<th>Component</th>
+<th>Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><code>Dialog</code></td>
+<td>Modal dialog with title, description, openPath</td>
+</tr>
+<tr>
+<td><code>Drawer</code></td>
+<td>Bottom drawer with title, description, openPath</td>
+</tr>
+<tr>
+<td><code>Tooltip</code></td>
+<td>Hover tooltip with content and text</td>
+</tr>
+<tr>
+<td><code>Popover</code></td>
+<td>Click-triggered popover with trigger and content</td>
+</tr>
+<tr>
+<td><code>DropdownMenu</code></td>
+<td>Dropdown menu with label and items array</td>
+</tr>
+</tbody>
+</table>
+
+### Content
+
+<table>
+<thead>
+<tr>
+<th>Component</th>
+<th>Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><code>Heading</code></td>
+<td>Heading text with level (h1-h4)</td>
+</tr>
+<tr>
+<td><code>Text</code></td>
+<td>Paragraph with variant (body, caption, muted, lead, code)</td>
+</tr>
+<tr>
+<td><code>Image</code></td>
+<td>Image with alt, width, height</td>
+</tr>
+<tr>
+<td><code>Avatar</code></td>
+<td>User avatar with src, name, size</td>
+</tr>
+<tr>
+<td><code>Badge</code></td>
+<td>Status badge with text and variant</td>
+</tr>
+<tr>
+<td><code>Alert</code></td>
+<td>Alert banner with title, message, type</td>
+</tr>
+<tr>
+<td><code>Carousel</code></td>
+<td>Horizontally scrollable carousel with items</td>
+</tr>
+<tr>
+<td><code>Table</code></td>
+<td>Data table with columns and rows</td>
+</tr>
+</tbody>
+</table>
+
+### Feedback
+
+<table>
+<thead>
+<tr>
+<th>Component</th>
+<th>Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><code>Progress</code></td>
+<td>Progress bar with value, max, label</td>
+</tr>
+<tr>
+<td><code>Skeleton</code></td>
+<td>Loading placeholder with width, height, rounded</td>
+</tr>
+<tr>
+<td><code>Spinner</code></td>
+<td>Loading spinner with size and label</td>
+</tr>
+</tbody>
+</table>
+
+### Input
+
+<table>
+<thead>
+<tr>
+<th>Component</th>
+<th>Description</th>
+</tr>
+</thead>
+<tbody>
+<tr>
+<td><code>Button</code></td>
+<td>Clickable button with label, variant, disabled</td>
+</tr>
+<tr>
+<td><code>Link</code></td>
+<td>Anchor link with label and href</td>
+</tr>
+<tr>
+<td><code>Input</code></td>
+<td>Text input with label, name, type, placeholder, value, checks</td>
+</tr>
+<tr>
+<td><code>Textarea</code></td>
+<td>Multi-line text input with label, name, placeholder, rows, value, checks</td>
+</tr>
+<tr>
+<td><code>Select</code></td>
+<td>Dropdown select with label, name, options, value, checks</td>
+</tr>
+<tr>
+<td><code>Checkbox</code></td>
+<td>Checkbox with label, name, checked</td>
+</tr>
+<tr>
+<td><code>Radio</code></td>
+<td>Radio button group with label, name, options, value</td>
+</tr>
+<tr>
+<td><code>Switch</code></td>
+<td>Toggle switch with label, name, checked</td>
+</tr>
+<tr>
+<td><code>Slider</code></td>
+<td>Range slider with label, min, max, step, value</td>
+</tr>
+<tr>
+<td><code>Toggle</code></td>
+<td>Toggle button with label, pressed, variant</td>
+</tr>
+<tr>
+<td><code>ToggleGroup</code></td>
+<td>Group of toggle buttons with items, type, value</td>
+</tr>
+<tr>
+<td><code>ButtonGroup</code></td>
+<td>Group of buttons with buttons array and selected</td>
+</tr>
+</tbody>
+</table>
+
+## Notes
+
+- The `/catalog` entry point has no Svelte dependency -- use it for server-side prompt generation
+- Components use Tailwind CSS classes -- your app must have Tailwind configured
+- Component implementations use bundled shadcn-svelte primitives (not your app's `$lib/components/ui/`)
+- Form inputs support `checks` for validation (type + message pairs) and `validateOn` for timing
+- Events: inputs emit `change`/`submit`/`focus`/`blur`; buttons emit `press`; selects emit `change`/`select`

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

@@ -0,0 +1,232 @@
+import { pageMetadata } from "@/lib/page-metadata"
+export const metadata = pageMetadata("docs/api/yaml")
+
+# @json-render/yaml
+
+YAML wire format for json-render. Progressive rendering and surgical edits via streaming YAML.
+
+## Prompt Generation
+
+### yamlPrompt
+
+Generate a YAML-format system prompt from any json-render catalog. Works with catalogs from any renderer.
+
+```typescript
+function yamlPrompt(
+  catalog: Catalog,
+  options?: YamlPromptOptions
+): string
+```
+
+```typescript
+import { yamlPrompt } from "@json-render/yaml";
+
+const systemPrompt = yamlPrompt(catalog, {
+  mode: "standalone",
+  customRules: ["Always use dark theme"],
+  editModes: ["merge"],
+});
+```
+
+### YamlPromptOptions
+
+<table>
+  <thead>
+    <tr>
+      <th>Option</th>
+      <th>Type</th>
+      <th>Default</th>
+      <th>Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><code>system</code></td>
+      <td><code>string</code></td>
+      <td><code>{'\"You are a UI generator that outputs YAML.\"'}</code></td>
+      <td>Custom system message intro</td>
+    </tr>
+    <tr>
+      <td><code>mode</code></td>
+      <td><code>{'\"standalone\" | \"inline\"'}</code></td>
+      <td><code>{'\"standalone\"'}</code></td>
+      <td>Standalone outputs only YAML; inline allows conversational responses with embedded YAML fences</td>
+    </tr>
+    <tr>
+      <td><code>customRules</code></td>
+      <td><code>{'string[]'}</code></td>
+      <td><code>{'[]'}</code></td>
+      <td>Additional rules appended to the prompt</td>
+    </tr>
+    <tr>
+      <td><code>editModes</code></td>
+      <td><code>{'EditMode[]'}</code></td>
+      <td><code>{'[\"merge\"]'}</code></td>
+      <td>Edit modes to document in the prompt (patch, merge, diff)</td>
+    </tr>
+  </tbody>
+</table>
+
+## AI SDK Transform
+
+### createYamlTransform
+
+Creates a `TransformStream` that intercepts AI SDK stream chunks and converts YAML spec/edit blocks into json-render patch data parts.
+
+```typescript
+function createYamlTransform(
+  options?: YamlTransformOptions
+): TransformStream<StreamChunk, StreamChunk>
+```
+
+Recognized fence types:
+
+- <code>{'```yaml-spec'}</code> -- Full YAML spec, parsed progressively
+- <code>{'```yaml-edit'}</code> -- Partial YAML, deep-merged with current spec
+- <code>{'```yaml-patch'}</code> -- RFC 6902 JSON Patch lines
+- <code>{'```diff'}</code> -- Unified diff against serialized spec
+
+### pipeYamlRender
+
+Convenience wrapper that pipes an AI SDK stream through the YAML transform. Drop-in replacement for `pipeJsonRender` from `@json-render/core`.
+
+```typescript
+function pipeYamlRender<T>(
+  stream: ReadableStream<T>,
+  options?: YamlTransformOptions
+): ReadableStream<T>
+```
+
+```typescript
+import { pipeYamlRender } from "@json-render/yaml";
+import { createUIMessageStream, createUIMessageStreamResponse } from "ai";
+
+const stream = createUIMessageStream({
+  execute: async ({ writer }) => {
+    writer.merge(pipeYamlRender(result.toUIMessageStream()));
+  },
+});
+return createUIMessageStreamResponse({ stream });
+```
+
+## Streaming Parser
+
+### createYamlStreamCompiler
+
+Create a streaming YAML compiler that incrementally parses YAML text and emits JSON Patch operations by diffing each successful parse against the previous snapshot.
+
+```typescript
+function createYamlStreamCompiler<T>(
+  initial?: Partial<T>
+): YamlStreamCompiler<T>
+```
+
+```typescript
+import { createYamlStreamCompiler } from "@json-render/yaml";
+
+const compiler = createYamlStreamCompiler<Spec>();
+
+compiler.push("root: main\n");
+compiler.push("elements:\n  main:\n    type: Card\n");
+
+const { result, newPatches } = compiler.flush();
+```
+
+### YamlStreamCompiler
+
+<table>
+  <thead>
+    <tr>
+      <th>Method</th>
+      <th>Returns</th>
+      <th>Description</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><code>push(chunk)</code></td>
+      <td><code>{'{ result: T; newPatches: JsonPatch[] }'}</code></td>
+      <td>Push a chunk of text, returns current result and new patches</td>
+    </tr>
+    <tr>
+      <td><code>flush()</code></td>
+      <td><code>{'{ result: T; newPatches: JsonPatch[] }'}</code></td>
+      <td>Flush remaining buffer, return final result</td>
+    </tr>
+    <tr>
+      <td><code>getResult()</code></td>
+      <td><code>T</code></td>
+      <td>Get the current compiled result</td>
+    </tr>
+    <tr>
+      <td><code>getPatches()</code></td>
+      <td><code>{'JsonPatch[]'}</code></td>
+      <td>Get all patches applied so far</td>
+    </tr>
+    <tr>
+      <td><code>reset(initial?)</code></td>
+      <td><code>void</code></td>
+      <td>Reset to initial state</td>
+    </tr>
+  </tbody>
+</table>
+
+## Fence Constants
+
+Exported string constants for fence detection in custom parsers:
+
+<table>
+  <thead>
+    <tr>
+      <th>Constant</th>
+      <th>Value</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <td><code>YAML_SPEC_FENCE</code></td>
+      <td><code>{'\"```yaml-spec\"'}</code></td>
+    </tr>
+    <tr>
+      <td><code>YAML_EDIT_FENCE</code></td>
+      <td><code>{'\"```yaml-edit\"'}</code></td>
+    </tr>
+    <tr>
+      <td><code>YAML_PATCH_FENCE</code></td>
+      <td><code>{'\"```yaml-patch\"'}</code></td>
+    </tr>
+    <tr>
+      <td><code>DIFF_FENCE</code></td>
+      <td><code>{'\"```diff\"'}</code></td>
+    </tr>
+    <tr>
+      <td><code>FENCE_CLOSE</code></td>
+      <td><code>{'\"```\"'}</code></td>
+    </tr>
+  </tbody>
+</table>
+
+## Re-exports from @json-render/core
+
+### diffToPatches
+
+Generate RFC 6902 JSON Patch operations that transform one object into another.
+
+```typescript
+function diffToPatches(
+  oldObj: Record<string, unknown>,
+  newObj: Record<string, unknown>,
+  basePath?: string
+): JsonPatch[]
+```
+
+### deepMergeSpec
+
+Deep-merge with RFC 7396 semantics: `null` deletes, arrays replace, objects recurse.
+
+```typescript
+function deepMergeSpec(
+  base: Record<string, unknown>,
+  patch: Record<string, unknown>
+): Record<string, unknown>
+```

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

@@ -1,6 +1,7 @@
 import { DocsMobileNav } from "@/components/docs-mobile-nav";
 import { DocsSidebar } from "@/components/docs-sidebar";
 import { CopyPageButton } from "@/components/copy-page-button";
+import { TableOfContents } from "@/components/table-of-contents";
 
 export default function DocsLayout({
   children,
@@ -10,7 +11,7 @@ export default function DocsLayout({
   return (
     <>
       <DocsMobileNav />
-      <div className="max-w-5xl mx-auto px-6 py-8 lg:py-12 flex gap-16">
+      <div className="max-w-7xl mx-auto px-6 py-8 lg:py-12 flex gap-12">
         {/* Sidebar */}
         <aside className="w-48 shrink-0 hidden lg:block sticky top-28 h-[calc(100vh-7rem)] overflow-y-auto">
           <DocsSidebar />
@@ -23,6 +24,11 @@ export default function DocsLayout({
           </div>
           <article>{children}</article>
         </div>
+
+        {/* On this page */}
+        <aside className="w-44 shrink-0 hidden xl:block sticky top-28 h-[calc(100vh-7rem)] overflow-y-auto">
+          <TableOfContents />
+        </aside>
       </div>
     </>
   );

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

@@ -83,6 +83,13 @@ All renderers share the same workflow:
       </td>
       <td>Video compositions</td>
     </tr>
+    <tr>
+      <td>Ink</td>
+      <td>
+        <code>@json-render/ink</code>
+      </td>
+      <td>Terminal UI (via Ink)</td>
+    </tr>
   </tbody>
 </table>
 
@@ -263,6 +270,30 @@ Uses a timeline spec format with compositions, tracks, and clips. Includes stand
 
 See the [@json-render/remotion API reference](/docs/api/remotion) for details.
 
+## Ink (Terminal)
+
+Render specs as terminal UIs using [Ink](https://github.com/vadimdemedes/ink). Multiple standard components including tables, progress bars, spinners, tabs, multi-select, and interactive inputs with Tab-cycling focus.
+
+```tsx
+import { defineCatalog } from "@json-render/core";
+import { schema } from "@json-render/ink/schema";
+import {
+  standardComponentDefinitions,
+  standardActionDefinitions,
+} from "@json-render/ink/catalog";
+import { defineRegistry, Renderer } from "@json-render/ink";
+
+const catalog = defineCatalog(schema, {
+  components: { ...standardComponentDefinitions },
+  actions: standardActionDefinitions,
+});
+
+const { registry } = defineRegistry(catalog, { components: {} });
+<Renderer spec={spec} registry={registry} />;
+```
+
+See the [@json-render/ink API reference](/docs/api/ink) for details.
+
 ## Custom Renderers
 
 You can build your own renderer for any output target. See the [Custom Schema & Renderer](/docs/custom-schema) guide for how to define a custom schema and wire it to your own rendering logic.

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

@@ -0,0 +1,133 @@
+"use client";
+
+import { useState } from "react";
+import { Badge } from "@/components/ui/badge";
+import { examples, allTags, getGitHubUrl, type Example } from "@/lib/examples";
+import { cn } from "@/lib/utils";
+
+function ExampleCard({ example }: { example: Example }) {
+  return (
+    <div className="group flex flex-col rounded-xl border border-border bg-card text-card-foreground overflow-hidden transition-colors hover:border-foreground/25">
+      <div className="flex flex-1 flex-col gap-3 p-5">
+        <h3 className="font-semibold leading-none">{example.title}</h3>
+
+        <p className="text-sm text-muted-foreground leading-relaxed">
+          {example.description}
+        </p>
+
+        <div className="flex flex-wrap gap-1.5">
+          {example.tags.map((tag) => (
+            <Badge key={tag} variant="secondary" className="text-[11px]">
+              {tag}
+            </Badge>
+          ))}
+        </div>
+
+        <div className="mt-auto flex items-center gap-3 pt-2">
+          {example.demoUrl && (
+            <a
+              href={example.demoUrl}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="inline-flex items-center gap-1.5 text-sm text-foreground hover:text-primary transition-colors"
+            >
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                width="14"
+                height="14"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                strokeWidth="2"
+                strokeLinecap="round"
+                strokeLinejoin="round"
+              >
+                <path d="M15 3h6v6" />
+                <path d="M10 14 21 3" />
+                <path d="M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6" />
+              </svg>
+              Live Demo
+            </a>
+          )}
+          <a
+            href={getGitHubUrl(example)}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground transition-colors"
+          >
+            <svg
+              viewBox="0 0 16 16"
+              className="h-3.5 w-3.5"
+              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>
+            Source
+          </a>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default function ExamplesPage() {
+  const [activeTag, setActiveTag] = useState<string | null>(null);
+
+  const filtered = activeTag
+    ? examples.filter((e) => e.tags.includes(activeTag))
+    : examples;
+
+  return (
+    <section className="mx-auto max-w-6xl px-6 py-16">
+      <div className="mb-10">
+        <h1 className="text-3xl font-bold tracking-tight sm:text-4xl">
+          Examples
+        </h1>
+        <p className="mt-3 text-lg text-muted-foreground">
+          Explore json-render across frameworks, renderers, and use cases.
+        </p>
+      </div>
+
+      <div className="mb-8 flex flex-wrap gap-2">
+        <button
+          onClick={() => setActiveTag(null)}
+          className={cn(
+            "rounded-full border px-3 py-1 text-xs font-medium transition-colors",
+            activeTag === null
+              ? "border-foreground bg-foreground text-background"
+              : "border-border text-muted-foreground hover:text-foreground hover:border-foreground/50",
+          )}
+        >
+          All
+        </button>
+        {allTags.map((tag) => (
+          <button
+            key={tag}
+            onClick={() => setActiveTag(activeTag === tag ? null : tag)}
+            className={cn(
+              "rounded-full border px-3 py-1 text-xs font-medium transition-colors",
+              activeTag === tag
+                ? "border-foreground bg-foreground text-background"
+                : "border-border text-muted-foreground hover:text-foreground hover:border-foreground/50",
+            )}
+          >
+            {tag}
+          </button>
+        ))}
+      </div>
+
+      <div className="grid gap-6 sm:grid-cols-2 lg:grid-cols-3">
+        {filtered.map((example) => (
+          <ExampleCard key={example.slug} example={example} />
+        ))}
+      </div>
+
+      {filtered.length === 0 && (
+        <p className="py-12 text-center text-muted-foreground">
+          No examples match the selected filter.
+        </p>
+      )}
+    </section>
+  );
+}

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

@@ -1,13 +1,16 @@
 import { Header } from "@/components/header";
+import { getStarCount } from "@/lib/github";
 
-export default function MainLayout({
+export default async function MainLayout({
   children,
 }: {
   children: React.ReactNode;
 }) {
+  const stars = await getStarCount();
+
   return (
     <div className="min-h-screen flex flex-col">
-      <Header />
+      <Header stars={stars} />
       <main className="flex-1">{children}</main>
     </div>
   );

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

@@ -16,8 +16,8 @@ const SYSTEM_PROMPT = `You are a helpful documentation assistant for json-render
 
 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/vue, @json-render/svelte, @json-render/solid, @json-render/shadcn, @json-render/react-three-fiber, @json-render/react-native, @json-render/react-email, @json-render/react-pdf, @json-render/image, @json-render/remotion, @json-render/codegen, @json-render/mcp, @json-render/redux, @json-render/zustand, @json-render/jotai, @json-render/xstate
-Skills: json-render ships AI agent skills that teach coding agents how to use each package. Install with "npx skills add vercel-labs/json-render --skill <name>". Available skills: core, react, react-pdf, react-email, react-native, shadcn, react-three-fiber, image, remotion, vue, svelte, solid, codegen, mcp, redux, zustand, jotai, xstate. See /docs/skills for details.
+npm packages: @json-render/core, @json-render/react, @json-render/next, @json-render/ink, @json-render/vue, @json-render/svelte, @json-render/solid, @json-render/shadcn, @json-render/shadcn-svelte, @json-render/react-three-fiber, @json-render/react-native, @json-render/react-email, @json-render/react-pdf, @json-render/image, @json-render/remotion, @json-render/codegen, @json-render/mcp, @json-render/redux, @json-render/zustand, @json-render/jotai, @json-render/xstate, @json-render/yaml
+Skills: json-render ships AI agent skills that teach coding agents how to use each package. Install with "npx skills add vercel-labs/json-render --skill <name>". Available skills: core, react, next, ink, react-pdf, react-email, react-native, shadcn, shadcn-svelte, react-three-fiber, image, remotion, vue, svelte, solid, codegen, mcp, redux, zustand, jotai, xstate, yaml. See /docs/skills for details.
 
 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.
 

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

@@ -1,32 +1,76 @@
 import { streamText } from "ai";
 import { headers } from "next/headers";
-import { buildUserPrompt } from "@json-render/core";
+import type { Spec, EditMode } from "@json-render/core";
+import {
+  buildUserPrompt,
+  buildEditUserPrompt,
+  isNonEmptySpec,
+} from "@json-render/core";
+import { yamlPrompt } from "@json-render/yaml";
+import { stringify as yamlStringify } from "yaml";
 import { minuteRateLimit, dailyRateLimit } from "@/lib/rate-limit";
 import { playgroundCatalog } from "@/lib/render/catalog";
 
 export const maxDuration = 30;
 
-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 PLAYGROUND_RULES = [
+  "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. Keep the total UI compact — avoid sprawling multi-section pages. Prefer a single focused Card over a full page layout.",
+  "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" }).',
+  "NEVER use emoji characters. Use the Icon component with Lucide icon names instead. For example, use Icon with name:'MapPin' instead of a pin emoji, Icon with name:'Mail' instead of an envelope emoji, etc.",
+  "For icon+label patterns, use a horizontal Stack with gap:'sm' and align:'center' containing an Icon and a Text.",
+  "For any tabular or list data with consistent columns (items, orders, stats), ALWAYS use the Table component. Never simulate tables with Stacks — the columns won't align.",
+];
 
 const MAX_PROMPT_LENGTH = 500;
 const DEFAULT_MODEL = "anthropic/claude-haiku-4.5";
 
+function getSystemPrompt(isYaml: boolean, editModes?: EditMode[]): string {
+  if (isYaml) {
+    return yamlPrompt(playgroundCatalog, {
+      mode: "standalone",
+      customRules: PLAYGROUND_RULES,
+      editModes: editModes ?? ["merge"],
+    });
+  }
+  return playgroundCatalog.prompt({
+    customRules: PLAYGROUND_RULES,
+    editModes,
+  });
+}
+
+function buildYamlUserPrompt(
+  prompt: string,
+  previousSpec?: Spec | null,
+  editModes?: EditMode[],
+): string {
+  if (isNonEmptySpec(previousSpec)) {
+    return buildEditUserPrompt({
+      prompt,
+      currentSpec: previousSpec,
+      config: { modes: editModes ?? ["merge"] },
+      format: "yaml",
+      maxPromptLength: MAX_PROMPT_LENGTH,
+      serializer: (s) => yamlStringify(s, { indent: 2 }).trimEnd(),
+    });
+  }
+
+  const userText = prompt.slice(0, MAX_PROMPT_LENGTH);
+  return [
+    userText,
+    "",
+    "Output the full spec in a ```yaml-spec fence. Stream progressively — output elements one at a time.",
+  ].join("\n");
+}
+
 export async function POST(req: Request) {
-  // Get client IP for rate limiting
   const headersList = await headers();
   const ip = headersList.get("x-forwarded-for")?.split(",")[0] ?? "anonymous";
 
-  // Check rate limits (minute and daily)
   const [minuteResult, dailyResult] = await Promise.all([
     minuteRateLimit.limit(ip),
     dailyRateLimit.limit(ip),
@@ -48,22 +92,34 @@ export async function POST(req: Request) {
     );
   }
 
-  const { prompt, context } = await req.json();
+  const { prompt, context, format, editModes } = await req.json();
+  const isYaml = format === "yaml";
 
-  const userPrompt = buildUserPrompt({
-    prompt,
-    currentSpec: context?.previousSpec,
-    maxPromptLength: MAX_PROMPT_LENGTH,
-  });
+  const systemPrompt = getSystemPrompt(isYaml, editModes);
+  const userPrompt = isYaml
+    ? buildYamlUserPrompt(prompt, context?.previousSpec, editModes)
+    : buildUserPrompt({
+        prompt,
+        currentSpec: context?.previousSpec,
+        maxPromptLength: MAX_PROMPT_LENGTH,
+        editModes,
+      });
 
   const result = streamText({
     model: process.env.AI_GATEWAY_MODEL || DEFAULT_MODEL,
-    system: SYSTEM_PROMPT,
+    system: [
+      {
+        role: "system",
+        content: systemPrompt,
+        providerOptions: {
+          anthropic: { cacheControl: { type: "ephemeral" } },
+        },
+      },
+    ],
     prompt: userPrompt,
     temperature: 0.7,
   });
 
-  // Stream the text, then append token usage metadata at the end
   const encoder = new TextEncoder();
   const textStream = result.textStream;
 
@@ -72,7 +128,6 @@ export async function POST(req: Request) {
       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({
@@ -80,10 +135,12 @@ export async function POST(req: Request) {
           promptTokens: usage.inputTokens,
           completionTokens: usage.outputTokens,
           totalTokens: usage.totalTokens,
+          cachedTokens: usage.inputTokenDetails?.cacheReadTokens ?? 0,
+          cacheWriteTokens: usage.inputTokenDetails?.cacheWriteTokens ?? 0,
         });
         controller.enqueue(encoder.encode(`\n${meta}\n`));
       } catch {
-        // Usage not available — skip silently
+        // Usage not available
       }
       controller.close();
     },

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

@@ -0,0 +1,74 @@
+import { NextRequest, NextResponse } from "next/server";
+import { getSearchIndex } from "@/lib/search-index";
+
+export async function GET(req: NextRequest) {
+  const q = req.nextUrl.searchParams.get("q")?.trim().toLowerCase();
+
+  if (!q) {
+    return NextResponse.json({ results: [] });
+  }
+
+  const index = await getSearchIndex();
+  const terms = q.split(/\s+/).filter(Boolean);
+
+  const results = index
+    .map((entry) => {
+      const titleLower = entry.title.toLowerCase();
+      const contentLower = entry.content.toLowerCase();
+
+      const titleMatch = terms.every((t) => titleLower.includes(t));
+      const contentMatch = terms.every((t) => contentLower.includes(t));
+
+      if (!titleMatch && !contentMatch) return null;
+
+      let snippet = "";
+      if (contentMatch) {
+        const firstTermIdx = Math.min(
+          ...terms.map((t) => {
+            const idx = contentLower.indexOf(t);
+            return idx === -1 ? Infinity : idx;
+          }),
+        );
+        if (firstTermIdx !== Infinity) {
+          const start = Math.max(0, firstTermIdx - 40);
+          const end = Math.min(entry.content.length, firstTermIdx + 120);
+          snippet =
+            (start > 0 ? "..." : "") +
+            entry.content.slice(start, end).replace(/\n/g, " ") +
+            (end < entry.content.length ? "..." : "");
+        }
+      }
+
+      return {
+        title: entry.title,
+        href: entry.href,
+        section: entry.section,
+        snippet,
+        score: titleMatch ? 2 : 1,
+      };
+    })
+    .filter(
+      (
+        r,
+      ): r is {
+        title: string;
+        href: string;
+        section: string;
+        snippet: string;
+        score: number;
+      } => r !== null,
+    )
+    .sort((a, b) => b.score - a.score)
+    .slice(0, 20)
+    .map(({ title, href, section, snippet }) => ({
+      title,
+      href,
+      section,
+      snippet,
+    }));
+
+  return NextResponse.json(
+    { results },
+    { headers: { "Cache-Control": "public, max-age=60" } },
+  );
+}

apps/web/components/code-block.tsx

@@ -145,7 +145,7 @@ function getHighlighter() {
   if (!highlighterPromise) {
     highlighterPromise = createHighlighter({
       themes: [vercelLightTheme, vercelDarkTheme],
-      langs: ["json", "tsx", "typescript"],
+      langs: ["json", "tsx", "typescript", "yaml"],
     });
   }
   return highlighterPromise;
@@ -158,7 +158,7 @@ if (typeof window !== "undefined") {
 
 interface CodeBlockProps {
   code: string;
-  lang: "json" | "tsx" | "typescript";
+  lang: "json" | "tsx" | "typescript" | "yaml";
   fillHeight?: boolean;
   hideCopyButton?: boolean;
 }

apps/web/components/demo.tsx

@@ -18,65 +18,62 @@ 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";
+const SIMULATION_PROMPT = "Show a team performance dashboard";
 
 interface SimulationStage {
   tree: Spec;
   stream: string;
 }
 
-// Shared state & element definitions for the progressive simulation stages.
-const FORM_STATE = { form: { name: "", email: "", message: "" } };
+const DASH_STATE = {
+  chartData: [
+    { label: "Mon", value: 12 },
+    { label: "Tue", value: 28 },
+    { label: "Wed", value: 19 },
+    { label: "Thu", value: 34 },
+    { label: "Fri", value: 45 },
+    { label: "Sat", value: 38 },
+    { label: "Sun", value: 52 },
+  ],
+};
 
-const NAME_INPUT = {
-  type: "Input",
+const METRIC_REVENUE = {
+  type: "Metric",
   props: {
-    label: "Name",
-    name: "name",
-    statePath: "/form/name",
-    checks: [{ type: "required", message: "Name is required" }],
+    label: "Weekly Revenue",
+    value: "12,400",
+    prefix: "$",
+    change: "+18%",
+    changeType: "positive",
   },
 } 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" },
-    ],
-  },
+const CHART = {
+  type: "LineGraph",
+  props: { data: { $state: "/chartData" } },
 } as const;
 
-const MESSAGE_INPUT = {
-  type: "Textarea",
-  props: {
-    label: "Message",
-    name: "message",
-    statePath: "/form/message",
-    checks: [{ type: "required", message: "Message is required" }],
-  },
+const SEP = { type: "Separator", props: {} } as const;
+
+const PROGRESS_DEALS = {
+  type: "Progress",
+  props: { value: 72, label: "Deals Closed -- 72%" },
 } as const;
 
-const SUBMIT_BUTTON = {
-  type: "Button",
-  props: { label: "Send Message", variant: "primary" },
-  on: { press: { action: "formSubmit" } },
+const PROGRESS_RETENTION = {
+  type: "Progress",
+  props: { value: 91, label: "Retention -- 91%" },
 } as const;
 
 const SIMULATION_STAGES: SimulationStage[] = [
   {
     tree: {
       root: "card",
-      state: FORM_STATE,
+      state: DASH_STATE,
       elements: {
         card: {
           type: "Card",
-          props: { title: "Contact Us", maxWidth: "md" },
+          props: { title: "Team Performance", maxWidth: "sm", centered: true },
           children: [],
         },
       },
@@ -86,72 +83,74 @@ const SIMULATION_STAGES: SimulationStage[] = [
   {
     tree: {
       root: "card",
-      state: FORM_STATE,
+      state: DASH_STATE,
       elements: {
         card: {
           type: "Card",
-          props: { title: "Contact Us", maxWidth: "md" },
-          children: ["name"],
+          props: { title: "Team Performance", maxWidth: "sm", centered: true },
+          children: ["m1"],
         },
-        name: NAME_INPUT,
+        m1: METRIC_REVENUE,
       },
     },
     stream:
-      '{"op":"add","path":"/elements/name","value":{"type":"Input","props":{"label":"Name","name":"name","statePath":"/form/name","checks":[{"type":"required","message":"Name is required"}]}}}',
+      '{"op":"add","path":"/elements/m1","value":{"type":"Metric","props":{"label":"Weekly Revenue","value":"12,400","prefix":"$","change":"+18%","changeType":"positive"}}}',
   },
   {
     tree: {
       root: "card",
-      state: FORM_STATE,
+      state: DASH_STATE,
       elements: {
         card: {
           type: "Card",
-          props: { title: "Contact Us", maxWidth: "md" },
-          children: ["name", "email"],
+          props: { title: "Team Performance", maxWidth: "sm", centered: true },
+          children: ["m1", "chart"],
         },
-        name: NAME_INPUT,
-        email: EMAIL_INPUT,
+        m1: METRIC_REVENUE,
+        chart: CHART,
       },
     },
     stream:
-      '{"op":"add","path":"/elements/email","value":{"type":"Input","props":{"label":"Email","name":"email","type":"email","statePath":"/form/email","checks":[{"type":"required","message":"Email is required"},{"type":"email","message":"Please enter a valid email"}]}}}',
+      '{"op":"add","path":"/elements/chart","value":{"type":"LineGraph","props":{"data":{"$state":"/chartData"}}}}',
   },
   {
     tree: {
       root: "card",
-      state: FORM_STATE,
+      state: DASH_STATE,
       elements: {
         card: {
           type: "Card",
-          props: { title: "Contact Us", maxWidth: "md" },
-          children: ["name", "email", "message"],
+          props: { title: "Team Performance", maxWidth: "sm", centered: true },
+          children: ["m1", "chart", "sep", "p1"],
         },
-        name: NAME_INPUT,
-        email: EMAIL_INPUT,
-        message: MESSAGE_INPUT,
+        m1: METRIC_REVENUE,
+        chart: CHART,
+        sep: SEP,
+        p1: PROGRESS_DEALS,
       },
     },
     stream:
-      '{"op":"add","path":"/elements/message","value":{"type":"Textarea","props":{"label":"Message","name":"message","statePath":"/form/message","checks":[{"type":"required","message":"Message is required"}]}}}',
+      '{"op":"add","path":"/elements/p1","value":{"type":"Progress","props":{"value":72,"label":"Deals Closed -- 72%"}}}',
   },
   {
     tree: {
       root: "card",
-      state: FORM_STATE,
+      state: DASH_STATE,
       elements: {
         card: {
           type: "Card",
-          props: { title: "Contact Us", maxWidth: "md" },
-          children: ["name", "email", "message", "submit"],
+          props: { title: "Team Performance", maxWidth: "sm", centered: true },
+          children: ["m1", "chart", "sep", "p1", "p2"],
         },
-        name: NAME_INPUT,
-        email: EMAIL_INPUT,
-        message: MESSAGE_INPUT,
-        submit: SUBMIT_BUTTON,
+        m1: METRIC_REVENUE,
+        chart: CHART,
+        sep: SEP,
+        p1: PROGRESS_DEALS,
+        p2: PROGRESS_RETENTION,
       },
     },
     stream:
-      '{"op":"add","path":"/elements/submit","value":{"type":"Button","props":{"label":"Send Message","variant":"primary"},"on":{"press":{"action":"formSubmit"}}}}',
+      '{"op":"add","path":"/elements/p2","value":{"type":"Progress","props":{"value":91,"label":"Retention -- 91%"}}}',
   },
 ];
 
@@ -211,10 +210,10 @@ function specToNested(spec: Spec): Record<string, unknown> {
 }
 
 const EXAMPLE_PROMPTS = [
-  "Create a login form with email and password",
-  "Build a feedback form with rating stars",
-  "Design a contact card with avatar",
-  "Make a settings panel with toggles",
+  "Recipe card with rating and ingredients",
+  "Order receipt with item list and total",
+  "Team member profile card",
+  "Notification inbox with alerts",
 ];
 
 export function Demo({
@@ -1117,7 +1116,7 @@ Open [http://localhost:3000](http://localhost:3000) to view.
             ))}
           </div>
           <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]"}`}
+            className={`border border-border rounded bg-background font-mono text-xs text-left grid relative group ${fullscreen ? "flex-1 min-h-0" : "h-[36rem]"}`}
           >
             {activeTab !== "catalog" && (
               <div className="absolute top-2 right-2 z-10">
@@ -1357,7 +1356,7 @@ Open [http://localhost:3000](http://localhost:3000) to view.
             </div>
           </div>
           <div
-            className={`border border-border rounded bg-background grid relative group ${fullscreen ? "flex-1 min-h-0" : "h-[28rem]"}`}
+            className={`border border-border rounded bg-background grid relative group ${fullscreen ? "flex-1 min-h-0" : "h-[36rem]"}`}
           >
             {renderView === "static" && (
               <div className="absolute top-2 right-2 z-10">

apps/web/components/docs-chat.tsx

@@ -261,10 +261,10 @@ export function DocsChat({
     }
   }, [messages, isLoading]);
 
-  // Cmd+K to open sidebar and focus prompt, Escape to close
+  // Cmd+I to open sidebar and focus prompt, Escape to close
   useEffect(() => {
     const handleKeyDown = (e: KeyboardEvent) => {
-      if (e.key === "k" && (e.metaKey || e.ctrlKey)) {
+      if (e.key === "i" && (e.metaKey || e.ctrlKey)) {
         e.preventDefault();
         setOpen((prev) => {
           if (!prev) {
@@ -497,12 +497,12 @@ export function DocsChat({
       {!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"
+          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 border-primary bg-primary text-primary-foreground shadow-lg hover:bg-primary/90 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
+            <span>&#8984;</span>I
           </kbd>
         </button>
       )}

apps/web/components/header.tsx

@@ -1,17 +1,65 @@
 "use client";
 
+import { useState } from "react";
 import Link from "next/link";
 import { usePathname } from "next/navigation";
 import { ThemeToggle } from "./theme-toggle";
+import { Search } from "./search";
+import {
+  Sheet,
+  SheetTrigger,
+  SheetContent,
+  SheetTitle,
+} from "@/components/ui/sheet";
 import { cn } from "@/lib/utils";
 
-export function Header() {
+const navLinks = [
+  { href: "/playground", label: "Playground" },
+  { href: "/examples", label: "Examples" },
+  { href: "/docs", label: "Docs" },
+];
+
+function GitHubLink({
+  className,
+  stars,
+}: {
+  className?: string;
+  stars?: string;
+}) {
+  return (
+    <a
+      href="https://github.com/vercel-labs/json-render"
+      target="_blank"
+      rel="noopener noreferrer"
+      className={cn(
+        "flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground transition-colors",
+        className,
+      )}
+    >
+      <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>
+      {stars && <span>{stars}</span>}
+    </a>
+  );
+}
+
+export function Header({ stars }: { stars?: string }) {
   const pathname = usePathname();
+  const [mobileOpen, setMobileOpen] = useState(false);
 
   const isActive = (href: string) => {
     if (href === "/playground") {
       return pathname === "/playground";
     }
+    if (href === "/examples") {
+      return pathname.startsWith("/examples");
+    }
     if (href === "/docs") {
       return pathname.startsWith("/docs");
     }
@@ -62,48 +110,81 @@ export function Header() {
             </span>
           </Link>
         </div>
-        <nav className="flex items-center gap-4">
-          <Link
-            href="/playground"
-            className={cn(
-              "text-sm transition-colors",
-              isActive("/playground")
-                ? "text-primary font-medium"
-                : "text-muted-foreground hover:text-foreground",
-            )}
-          >
-            <span className="sm:hidden">Play</span>
-            <span className="hidden sm:inline">Playground</span>
-          </Link>
-          <Link
-            href="/docs"
-            className={cn(
-              "text-sm transition-colors",
-              isActive("/docs")
-                ? "text-primary font-medium"
-                : "text-muted-foreground hover:text-foreground",
-            )}
-          >
-            Docs
-          </Link>
-          <a
-            href="https://github.com/vercel-labs/json-render"
-            target="_blank"
-            rel="noopener noreferrer"
-            className="flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground transition-colors"
-          >
-            <svg
-              viewBox="0 0 16 16"
-              className="h-4 w-4"
-              fill="currentColor"
-              aria-hidden="true"
+
+        {/* Desktop nav */}
+        <nav className="hidden sm:flex items-center gap-4">
+          {navLinks.map((link) => (
+            <Link
+              key={link.href}
+              href={link.href}
+              className={cn(
+                "text-sm transition-colors",
+                isActive(link.href)
+                  ? "text-primary"
+                  : "text-muted-foreground hover:text-foreground",
+              )}
             >
-              <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>12k</span>
-          </a>
+              {link.label}
+            </Link>
+          ))}
+          <Search />
+          <GitHubLink stars={stars} />
           <ThemeToggle />
         </nav>
+
+        {/* Mobile nav */}
+        <div className="flex sm:hidden items-center gap-3">
+          <Search />
+          <GitHubLink stars={stars} />
+          <Sheet open={mobileOpen} onOpenChange={setMobileOpen}>
+            <SheetTrigger
+              className="flex items-center justify-center"
+              aria-label="Open menu"
+            >
+              <svg
+                xmlns="http://www.w3.org/2000/svg"
+                width="20"
+                height="20"
+                viewBox="0 0 24 24"
+                fill="none"
+                stroke="currentColor"
+                strokeWidth="2"
+                strokeLinecap="round"
+                strokeLinejoin="round"
+                className="text-muted-foreground"
+              >
+                <line x1="4" x2="20" y1="12" y2="12" />
+                <line x1="4" x2="20" y1="6" y2="6" />
+                <line x1="4" x2="20" y1="18" y2="18" />
+              </svg>
+            </SheetTrigger>
+            <SheetContent side="right" className="overflow-y-auto p-6">
+              <SheetTitle className="mb-6">Menu</SheetTitle>
+              <nav className="flex flex-col gap-1">
+                {navLinks.map((link) => (
+                  <Link
+                    key={link.href}
+                    href={link.href}
+                    onClick={() => setMobileOpen(false)}
+                    className={cn(
+                      "block py-2.5 text-sm transition-colors",
+                      isActive(link.href)
+                        ? "text-primary"
+                        : "text-muted-foreground hover:text-foreground",
+                    )}
+                  >
+                    {link.label}
+                  </Link>
+                ))}
+                <div className="my-3 border-t border-border" />
+                <div className="flex items-center justify-between py-2.5">
+                  <span className="text-sm text-muted-foreground">Theme</span>
+                  <ThemeToggle />
+                </div>
+              </nav>
+            </SheetContent>
+          </Sheet>
+        </div>
       </div>
     </header>
   );

apps/web/components/playground.tsx

@@ -2,10 +2,16 @@
 
 import { useEffect, useState, useCallback, useRef, useMemo } from "react";
 import { flushSync } from "react-dom";
-import { useUIStream, type TokenUsage } from "@json-render/react";
 import type { Spec } from "@json-render/core";
 import { collectUsedComponents, serializeProps } from "@json-render/codegen";
 import { toast } from "sonner";
+import { stringify as yamlStringify } from "yaml";
+import type { EditMode } from "@json-render/core";
+import {
+  usePlaygroundStream,
+  type StreamFormat,
+  type TokenUsage,
+} from "@/lib/use-playground-stream";
 import {
   ResizablePanelGroup,
   ResizablePanel,
@@ -22,10 +28,10 @@ import { PlaygroundRenderer } from "@/lib/render/renderer";
 import { playgroundCatalog } from "@/lib/render/catalog";
 import { buildCatalogDisplayData } from "@/lib/render/catalog-display";
 
-type Tab = "json" | "nested" | "stream" | "catalog" | "visual";
+type Tab = "spec" | "nested" | "stream" | "catalog" | "visual";
 type RenderView = "preview" | "code";
 type MobileView =
-  | "json"
+  | "spec"
   | "nested"
   | "stream"
   | "catalog"
@@ -40,6 +46,79 @@ interface Version {
   status: "generating" | "complete" | "error";
   usage: TokenUsage | null;
   rawLines: string[];
+  format: StreamFormat;
+}
+
+function formatTokens(n: number): string {
+  if (n >= 1000) return `${(n / 1000).toFixed(1).replace(/\.0$/, "")}k`;
+  return String(n);
+}
+
+function PlaygroundControls({
+  format,
+  setFormat,
+  editModes,
+  setEditModes,
+  showClear,
+  onClear,
+}: {
+  format: StreamFormat;
+  setFormat: (f: StreamFormat) => void;
+  editModes: EditMode[];
+  setEditModes: React.Dispatch<React.SetStateAction<EditMode[]>>;
+  showClear: boolean;
+  onClear: () => void;
+}) {
+  return (
+    <div className="flex items-center gap-2">
+      <div className="flex items-center rounded border border-border text-[10px] font-mono overflow-hidden">
+        {(["jsonl", "yaml"] as const).map((f) => (
+          <button
+            key={f}
+            onClick={() => setFormat(f)}
+            className={`px-1.5 py-0.5 transition-colors ${
+              format === f
+                ? "bg-muted text-foreground"
+                : "text-muted-foreground hover:text-foreground"
+            }`}
+          >
+            {f}
+          </button>
+        ))}
+      </div>
+      <div className="flex items-center rounded border border-border text-[10px] font-mono overflow-hidden">
+        {(["patch", "merge", "diff"] as const).map((m) => (
+          <button
+            key={m}
+            onClick={() => {
+              setEditModes((prev) =>
+                prev.includes(m)
+                  ? prev.length > 1
+                    ? prev.filter((x) => x !== m)
+                    : prev
+                  : [...prev, m],
+              );
+            }}
+            className={`px-1.5 py-0.5 transition-colors ${
+              editModes.includes(m)
+                ? "bg-muted text-foreground"
+                : "text-muted-foreground hover:text-foreground"
+            }`}
+          >
+            {m}
+          </button>
+        ))}
+      </div>
+      {showClear && (
+        <button
+          onClick={onClear}
+          className="text-xs text-muted-foreground hover:text-foreground transition-colors"
+        >
+          Clear
+        </button>
+      )}
+    </div>
+  );
 }
 
 /**
@@ -100,13 +179,15 @@ export function Playground() {
     null,
   );
   const [inputValue, setInputValue] = useState("");
-  const [activeTab, setActiveTab] = useState<Tab>("json");
+  const [activeTab, setActiveTab] = useState<Tab>("spec");
   const [catalogSection, setCatalogSection] = useState<
     "components" | "actions"
   >("components");
   const [renderView, setRenderView] = useState<RenderView>("preview");
   const [mobileView, setMobileView] = useState<MobileView>("preview");
   const [versionsSheetOpen, setVersionsSheetOpen] = useState(false);
+  const [format, setFormat] = useState<StreamFormat>("jsonl");
+  const [editModes, setEditModes] = useState<EditMode[]>(["patch"]);
   const inputRef = useRef<HTMLTextAreaElement>(null);
   const mobileInputRef = useRef<HTMLTextAreaElement>(null);
   const versionsEndRef = useRef<HTMLDivElement>(null);
@@ -124,12 +205,13 @@ export function Playground() {
     rawLines: streamRawLines,
     send,
     clear,
-  } = useUIStream({
+  } = usePlaygroundStream({
     api: "/api/generate",
+    format,
+    editModes,
     onError: (err: Error) => {
       console.error("Generation error:", err);
       toast.error(err.message || "Generation failed. Please try again.");
-      // Mark the version as errored
       if (generatingVersionIdRef.current) {
         const erroredVersionId = generatingVersionIdRef.current;
         setVersions((prev) =>
@@ -140,7 +222,7 @@ export function Playground() {
         generatingVersionIdRef.current = null;
       }
     },
-  } as Parameters<typeof useUIStream>[0]);
+  });
 
   // Get the selected version
   const selectedVersion = versions.find((v) => v.id === selectedVersionId);
@@ -215,6 +297,7 @@ export function Playground() {
       status: "generating",
       usage: null,
       rawLines: [],
+      format,
     };
 
     generatingVersionIdRef.current = newVersionId;
@@ -224,7 +307,7 @@ export function Playground() {
 
     // Pass the current tree as context so the API can iterate on it
     await send(inputValue.trim(), { previousSpec: currentTreeRef.current });
-  }, [inputValue, isStreaming, send]);
+  }, [inputValue, isStreaming, send, format]);
 
   const handleKeyDown = useCallback(
     (e: React.KeyboardEvent) => {
@@ -250,9 +333,16 @@ export function Playground() {
     [selectedVersionId, isStreaming],
   );
 
-  const jsonCode = currentTree
-    ? JSON.stringify(currentTree, null, 2)
-    : "// waiting...";
+  const specCode = useMemo(() => {
+    if (!currentTree)
+      return format === "yaml" ? "# waiting..." : "// waiting...";
+    if (format === "yaml") {
+      return yamlStringify(currentTree, { indent: 2 }).trimEnd();
+    }
+    return JSON.stringify(currentTree, null, 2);
+  }, [currentTree, format]);
+
+  const specLang = format === "yaml" ? "yaml" : "json";
 
   const nestedCode = useMemo(() => {
     if (!currentTree || !currentTree.root) return "// waiting...";
@@ -275,7 +365,7 @@ export function Playground() {
       const componentName = element.type;
 
       const propsObj: Record<string, unknown> = {};
-      for (const [k, v] of Object.entries(element.props)) {
+      for (const [k, v] of Object.entries(element.props ?? {})) {
         if (v !== null && v !== undefined) {
           propsObj[k] = v;
         }
@@ -321,6 +411,15 @@ ${jsx}
 }`;
   }, [currentTree]);
 
+  // Determine syntax lang for raw stream based on selected version's format
+  const streamLang = isSelectedVersionGenerating
+    ? format === "yaml"
+      ? "yaml"
+      : "json"
+    : selectedVersion?.format === "yaml"
+      ? "yaml"
+      : "json";
+
   // Chat pane content
   const chatPane = (
     <div className="h-full flex flex-col border-t border-border">
@@ -392,9 +491,15 @@ ${jsx}
                 )}
               </div>
               {version.usage && (
-                <div className="flex items-center gap-2 mt-1 ml-6">
+                <div className="mt-1 ml-6">
                   <span className="text-[10px] font-mono text-muted-foreground/60">
-                    {version.usage.totalTokens.toLocaleString()} tokens
+                    {formatTokens(
+                      version.usage.promptTokens - version.usage.cachedTokens,
+                    )}{" "}
+                    in · {formatTokens(version.usage.completionTokens)} out
+                    {version.usage.cachedTokens > 0
+                      ? ` · ${formatTokens(version.usage.cachedTokens)} cached`
+                      : ""}
                   </span>
                 </div>
               )}
@@ -425,20 +530,18 @@ ${jsx}
           autoFocus
         />
         <div className="flex justify-between items-center mt-2">
-          {versions.length > 0 ? (
-            <button
-              onClick={() => {
-                setVersions([]);
-                setSelectedVersionId(null);
-                clear();
-              }}
-              className="text-xs text-muted-foreground hover:text-foreground transition-colors"
-            >
-              Clear
-            </button>
-          ) : (
-            <div />
-          )}
+          <PlaygroundControls
+            format={format}
+            setFormat={setFormat}
+            editModes={editModes}
+            setEditModes={setEditModes}
+            showClear={versions.length > 0}
+            onClear={() => {
+              setVersions([]);
+              setSelectedVersionId(null);
+              clear();
+            }}
+          />
           {isStreaming ? (
             <button
               onClick={() => clear()}
@@ -492,18 +595,18 @@ ${jsx}
   const copyText =
     activeTab === "stream"
       ? currentRawLines.join("\n")
-      : activeTab === "json"
-        ? jsonCode
+      : activeTab === "spec"
+        ? specCode
         : activeTab === "nested"
           ? nestedCode
           : activeTab === "visual"
-            ? jsonCode
+            ? specCode
             : "";
 
   const codePane = (
     <div className="h-full flex flex-col border-t border-border">
       <div className="border-b border-border px-3 h-9 flex items-center gap-3">
-        {(["json", "visual", "nested", "stream", "catalog"] as const).map(
+        {(["spec", "visual", "nested", "stream", "catalog"] as const).map(
           (tab) => (
             <button
               key={tab}
@@ -514,7 +617,7 @@ ${jsx}
                   : "text-muted-foreground hover:text-foreground"
               }`}
             >
-              {tab}
+              {tab === "spec" ? (format === "yaml" ? "yaml" : "json") : tab}
             </button>
           ),
         )}
@@ -679,7 +782,7 @@ ${jsx}
           currentRawLines.length > 0 ? (
             <CodeBlock
               code={currentRawLines.join("\n")}
-              lang="json"
+              lang={streamLang}
               fillHeight
               hideCopyButton
             />
@@ -691,7 +794,12 @@ ${jsx}
         ) : activeTab === "nested" ? (
           <CodeBlock code={nestedCode} lang="json" fillHeight hideCopyButton />
         ) : (
-          <CodeBlock code={jsonCode} lang="json" fillHeight hideCopyButton />
+          <CodeBlock
+            code={specCode}
+            lang={specLang}
+            fillHeight
+            hideCopyButton
+          />
         )}
       </div>
     </div>
@@ -790,7 +898,7 @@ ${jsx}
               : 0}
           </button>
           {/* Code tabs */}
-          {(["json", "visual", "nested", "stream", "catalog"] as const).map(
+          {(["spec", "visual", "nested", "stream", "catalog"] as const).map(
             (tab) => (
               <button
                 key={tab}
@@ -801,7 +909,7 @@ ${jsx}
                     : "text-muted-foreground hover:text-foreground"
                 }`}
               >
-                {tab}
+                {tab === "spec" ? (format === "yaml" ? "yaml" : "json") : tab}
               </button>
             ),
           )}
@@ -982,7 +1090,7 @@ ${jsx}
             currentRawLines.length > 0 ? (
               <CodeBlock
                 code={currentRawLines.join("\n")}
-                lang="json"
+                lang={streamLang}
                 fillHeight
                 hideCopyButton
               />
@@ -998,8 +1106,13 @@ ${jsx}
               fillHeight
               hideCopyButton
             />
-          ) : mobileView === "json" ? (
-            <CodeBlock code={jsonCode} lang="json" fillHeight hideCopyButton />
+          ) : mobileView === "spec" ? (
+            <CodeBlock
+              code={specCode}
+              lang={specLang}
+              fillHeight
+              hideCopyButton
+            />
           ) : mobileView === "preview" ? (
             currentTree && currentTree.root ? (
               <div className="w-full min-h-full flex items-center justify-center p-6">
@@ -1075,20 +1188,18 @@ ${jsx}
             rows={2}
           />
           <div className="flex justify-between items-center mt-2">
-            {versions.length > 0 ? (
-              <button
-                onClick={() => {
-                  setVersions([]);
-                  setSelectedVersionId(null);
-                  clear();
-                }}
-                className="text-xs text-muted-foreground hover:text-foreground transition-colors"
-              >
-                Clear
-              </button>
-            ) : (
-              <div />
-            )}
+            <PlaygroundControls
+              format={format}
+              setFormat={setFormat}
+              editModes={editModes}
+              setEditModes={setEditModes}
+              showClear={versions.length > 0}
+              onClear={() => {
+                setVersions([]);
+                setSelectedVersionId(null);
+                clear();
+              }}
+            />
             {isStreaming ? (
               <button
                 onClick={() => clear()}
@@ -1165,9 +1276,16 @@ ${jsx}
                     )}
                   </div>
                   {version.usage && (
-                    <div className="flex items-center gap-2 mt-1 ml-6">
+                    <div className="mt-1 ml-6">
                       <span className="text-[10px] font-mono text-muted-foreground/60">
-                        {version.usage.totalTokens.toLocaleString()} tokens
+                        {formatTokens(
+                          version.usage.promptTokens -
+                            version.usage.cachedTokens,
+                        )}{" "}
+                        in · {formatTokens(version.usage.completionTokens)} out
+                        {version.usage.cachedTokens > 0
+                          ? ` · ${formatTokens(version.usage.cachedTokens)} cached`
+                          : ""}
                       </span>
                     </div>
                   )}

apps/web/components/search.tsx

@@ -0,0 +1,266 @@
+"use client";
+
+import { useCallback, useEffect, useRef, useState } from "react";
+import { useRouter } from "next/navigation";
+import { Dialog, DialogContent, DialogTitle } from "@/components/ui/dialog";
+import { cn } from "@/lib/utils";
+
+type SearchResult = {
+  title: string;
+  href: string;
+  section: string;
+  snippet: string;
+};
+
+export function Search() {
+  const router = useRouter();
+  const [open, setOpen] = useState(false);
+  const [query, setQuery] = useState("");
+  const [results, setResults] = useState<SearchResult[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [activeIndex, setActiveIndex] = useState(0);
+  const inputRef = useRef<HTMLInputElement>(null);
+  const listRef = useRef<HTMLDivElement>(null);
+  const abortRef = useRef<AbortController | null>(null);
+
+  const navigate = useCallback(
+    (href: string) => {
+      setOpen(false);
+      setQuery("");
+      setResults([]);
+      router.push(href);
+    },
+    [router],
+  );
+
+  useEffect(() => {
+    function onKeyDown(e: KeyboardEvent) {
+      if ((e.metaKey || e.ctrlKey) && e.key === "k") {
+        e.preventDefault();
+        setOpen((prev) => !prev);
+      }
+    }
+    document.addEventListener("keydown", onKeyDown);
+    return () => document.removeEventListener("keydown", onKeyDown);
+  }, []);
+
+  useEffect(() => {
+    if (open) {
+      setTimeout(() => inputRef.current?.focus(), 0);
+    } else {
+      setQuery("");
+      setResults([]);
+    }
+  }, [open]);
+
+  useEffect(() => {
+    const q = query.trim();
+    if (!q) {
+      setResults([]);
+      setLoading(false);
+      return;
+    }
+
+    setLoading(true);
+    abortRef.current?.abort();
+    const controller = new AbortController();
+    abortRef.current = controller;
+
+    const timeout = setTimeout(async () => {
+      try {
+        const res = await fetch(`/api/search?q=${encodeURIComponent(q)}`, {
+          signal: controller.signal,
+        });
+        if (res.ok) {
+          const data = await res.json();
+          setResults(data.results);
+        }
+      } catch {
+        // aborted or network error
+      } finally {
+        if (!controller.signal.aborted) {
+          setLoading(false);
+        }
+      }
+    }, 150);
+
+    return () => {
+      clearTimeout(timeout);
+      controller.abort();
+    };
+  }, [query]);
+
+  useEffect(() => {
+    setActiveIndex(0);
+  }, [results]);
+
+  function handleKeyDown(e: React.KeyboardEvent) {
+    if (e.key === "ArrowDown") {
+      e.preventDefault();
+      setActiveIndex((i) => Math.min(i + 1, results.length - 1));
+    } else if (e.key === "ArrowUp") {
+      e.preventDefault();
+      setActiveIndex((i) => Math.max(i - 1, 0));
+    } else if (e.key === "Enter" && results[activeIndex]) {
+      e.preventDefault();
+      navigate(results[activeIndex].href);
+    }
+  }
+
+  useEffect(() => {
+    const active = listRef.current?.querySelector("[data-active='true']");
+    active?.scrollIntoView({ block: "nearest" });
+  }, [activeIndex]);
+
+  const hasQuery = query.trim().length > 0;
+
+  return (
+    <>
+      <button
+        onClick={() => setOpen(true)}
+        className="hidden sm:flex items-center gap-2 rounded-md border border-border bg-muted/50 px-3 py-1.5 text-sm text-muted-foreground hover:text-foreground hover:border-foreground/25 transition-colors"
+      >
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          width="14"
+          height="14"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="2"
+          strokeLinecap="round"
+          strokeLinejoin="round"
+        >
+          <circle cx="11" cy="11" r="8" />
+          <path d="m21 21-4.3-4.3" />
+        </svg>
+        Search docs
+        <kbd className="pointer-events-none ml-1 inline-flex items-center gap-0.5 rounded border border-border bg-background px-1.5 py-0.5 font-mono text-[10px] text-muted-foreground">
+          <span>&#8984;</span>K
+        </kbd>
+      </button>
+
+      <button
+        onClick={() => setOpen(true)}
+        className="sm:hidden flex items-center text-muted-foreground hover:text-foreground transition-colors"
+        aria-label="Search docs"
+      >
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          width="16"
+          height="16"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="2"
+          strokeLinecap="round"
+          strokeLinejoin="round"
+        >
+          <circle cx="11" cy="11" r="8" />
+          <path d="m21 21-4.3-4.3" />
+        </svg>
+      </button>
+
+      <Dialog open={open} onOpenChange={setOpen}>
+        <DialogContent
+          showCloseButton={false}
+          className="gap-0 p-0 sm:max-w-lg"
+        >
+          <DialogTitle className="sr-only">Search documentation</DialogTitle>
+          <div className="flex items-center gap-2 border-b px-3">
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              width="16"
+              height="16"
+              viewBox="0 0 24 24"
+              fill="none"
+              stroke="currentColor"
+              strokeWidth="2"
+              strokeLinecap="round"
+              strokeLinejoin="round"
+              className="shrink-0 text-muted-foreground"
+            >
+              <circle cx="11" cy="11" r="8" />
+              <path d="m21 21-4.3-4.3" />
+            </svg>
+            <input
+              ref={inputRef}
+              value={query}
+              onChange={(e) => setQuery(e.target.value)}
+              onKeyDown={handleKeyDown}
+              placeholder="Search docs..."
+              className="flex-1 bg-transparent py-3 text-sm outline-none placeholder:text-muted-foreground"
+            />
+            {query && (
+              <button
+                onClick={() => setQuery("")}
+                className="text-muted-foreground hover:text-foreground"
+              >
+                <svg
+                  xmlns="http://www.w3.org/2000/svg"
+                  width="14"
+                  height="14"
+                  viewBox="0 0 24 24"
+                  fill="none"
+                  stroke="currentColor"
+                  strokeWidth="2"
+                  strokeLinecap="round"
+                  strokeLinejoin="round"
+                >
+                  <path d="M18 6 6 18" />
+                  <path d="m6 6 12 12" />
+                </svg>
+              </button>
+            )}
+          </div>
+
+          <div
+            ref={listRef}
+            className="max-h-[min(60vh,400px)] overflow-y-auto p-2"
+          >
+            {loading && hasQuery ? (
+              <div className="flex items-center justify-center py-6">
+                <div className="h-4 w-4 animate-spin rounded-full border-2 border-muted-foreground border-t-transparent" />
+              </div>
+            ) : hasQuery && results.length === 0 ? (
+              <p className="py-6 text-center text-sm text-muted-foreground">
+                No results found.
+              </p>
+            ) : !hasQuery ? (
+              <p className="py-6 text-center text-sm text-muted-foreground">
+                Type to search documentation...
+              </p>
+            ) : (
+              results.map((item, i) => (
+                <button
+                  key={item.href}
+                  data-active={i === activeIndex}
+                  onClick={() => navigate(item.href)}
+                  onMouseEnter={() => setActiveIndex(i)}
+                  className={cn(
+                    "flex w-full flex-col gap-1 rounded-md px-3 py-2 text-left transition-colors",
+                    i === activeIndex
+                      ? "bg-accent text-accent-foreground"
+                      : "text-foreground",
+                  )}
+                >
+                  <div className="flex items-center justify-between gap-2">
+                    <span className="text-sm font-medium">{item.title}</span>
+                    <span className="shrink-0 text-xs text-muted-foreground">
+                      {item.section}
+                    </span>
+                  </div>
+                  {item.snippet && (
+                    <span className="line-clamp-2 text-xs text-muted-foreground leading-relaxed">
+                      {item.snippet}
+                    </span>
+                  )}
+                </button>
+              ))
+            )}
+          </div>
+        </DialogContent>
+      </Dialog>
+    </>
+  );
+}

apps/web/components/table-of-contents.tsx

@@ -0,0 +1,83 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { usePathname } from "next/navigation";
+import { cn } from "@/lib/utils";
+
+type Heading = {
+  id: string;
+  text: string;
+  level: number;
+};
+
+function getHeadings(): Heading[] {
+  const article = document.querySelector("article");
+  if (!article) return [];
+  const elements = article.querySelectorAll("h2[id], h3[id]");
+  return Array.from(elements).map((el) => ({
+    id: el.id,
+    text: el.textContent?.replace(/#$/, "").trim() ?? "",
+    level: el.tagName === "H3" ? 3 : 2,
+  }));
+}
+
+export function TableOfContents() {
+  const pathname = usePathname();
+  const [headings, setHeadings] = useState<Heading[]>([]);
+  const [activeId, setActiveId] = useState<string>("");
+
+  useEffect(() => {
+    const timer = setTimeout(() => setHeadings(getHeadings()), 100);
+    return () => clearTimeout(timer);
+  }, [pathname]);
+
+  useEffect(() => {
+    if (headings.length === 0) return;
+
+    const observer = new IntersectionObserver(
+      (entries) => {
+        for (const entry of entries) {
+          if (entry.isIntersecting) {
+            setActiveId(entry.target.id);
+          }
+        }
+      },
+      { rootMargin: "0px 0px -75% 0px", threshold: 0.1 },
+    );
+
+    for (const h of headings) {
+      const el = document.getElementById(h.id);
+      if (el) observer.observe(el);
+    }
+
+    return () => observer.disconnect();
+  }, [headings]);
+
+  if (headings.length === 0) return null;
+
+  return (
+    <nav aria-label="On this page">
+      <h4 className="text-xs font-medium text-muted-foreground uppercase tracking-wider mb-3">
+        On this page
+      </h4>
+      <ul className="space-y-1">
+        {headings.map((h) => (
+          <li key={h.id}>
+            <a
+              href={`#${h.id}`}
+              className={cn(
+                "block text-xs leading-relaxed py-0.5 transition-colors",
+                h.level === 3 && "pl-3",
+                activeId === h.id
+                  ? "text-foreground"
+                  : "text-muted-foreground hover:text-foreground",
+              )}
+            >
+              {h.text}
+            </a>
+          </li>
+        ))}
+      </ul>
+    </nav>
+  );
+}

apps/web/lib/docs-navigation.ts

@@ -45,63 +45,7 @@ export const docsNavigation: NavSection[] = [
   },
   {
     title: "Examples",
-    items: [
-      {
-        title: "Chat",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/chat",
-        external: true,
-      },
-      {
-        title: "Dashboard",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/dashboard",
-        external: true,
-      },
-      {
-        title: "React Native",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/react-native",
-        external: true,
-      },
-      {
-        title: "React PDF",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/react-pdf",
-        external: true,
-      },
-      {
-        title: "React Email",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/react-email",
-        external: true,
-      },
-      {
-        title: "Remotion",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/remotion",
-        external: true,
-      },
-      {
-        title: "Image",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/image",
-        external: true,
-      },
-      {
-        title: "Svelte",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/svelte",
-        external: true,
-      },
-      {
-        title: "Vue",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/vue",
-        external: true,
-      },
-      {
-        title: "Renders with Vite (Vue / React / Svelte / Solid)",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/vite-renderers",
-        external: true,
-      },
-      {
-        title: "MCP App",
-        href: "https://github.com/vercel-labs/json-render/tree/main/examples/mcp",
-        external: true,
-      },
-    ],
+    items: [{ title: "Browse All Examples", href: "/examples" }],
   },
   {
     title: "Guides",
@@ -125,12 +69,15 @@ export const docsNavigation: NavSection[] = [
     items: [
       { title: "@json-render/core", href: "/docs/api/core" },
       { title: "@json-render/react", href: "/docs/api/react" },
+      { title: "@json-render/next", href: "/docs/api/next" },
       { title: "@json-render/react-pdf", href: "/docs/api/react-pdf" },
       { title: "@json-render/react-email", href: "/docs/api/react-email" },
       { title: "@json-render/shadcn", href: "/docs/api/shadcn" },
+      { title: "@json-render/shadcn-svelte", href: "/docs/api/shadcn-svelte" },
       { title: "@json-render/react-native", href: "/docs/api/react-native" },
       { title: "@json-render/image", href: "/docs/api/image" },
       { title: "@json-render/remotion", href: "/docs/api/remotion" },
+      { title: "@json-render/ink", href: "/docs/api/ink" },
       { title: "@json-render/vue", href: "/docs/api/vue" },
       { title: "@json-render/svelte", href: "/docs/api/svelte" },
       { title: "@json-render/solid", href: "/docs/api/solid" },
@@ -144,6 +91,7 @@ export const docsNavigation: NavSection[] = [
       { title: "@json-render/zustand", href: "/docs/api/zustand" },
       { title: "@json-render/jotai", href: "/docs/api/jotai" },
       { title: "@json-render/xstate", href: "/docs/api/xstate" },
+      { title: "@json-render/yaml", href: "/docs/api/yaml" },
     ],
   },
 ];

apps/web/lib/examples.ts

@@ -0,0 +1,176 @@
+export type Example = {
+  slug: string;
+  title: string;
+  description: string;
+  tags: string[];
+  githubPath: string;
+  demoUrl?: string;
+};
+
+const GITHUB_BASE =
+  "https://github.com/vercel-labs/json-render/tree/main/examples";
+
+export const examples: Example[] = [
+  {
+    slug: "chat",
+    title: "Chat",
+    description:
+      "AI chat app with tool calling, streaming UI, and rich components powered by the AI SDK.",
+    tags: ["React", "Next.js", "AI"],
+    githubPath: "examples/chat",
+    demoUrl: "https://chat-demo.json-render.dev",
+  },
+  {
+    slug: "dashboard",
+    title: "Dashboard",
+    description:
+      "AI-generated dashboard with drag-and-drop, charts, and real-time data binding.",
+    tags: ["React", "Next.js", "AI"],
+    githubPath: "examples/dashboard",
+    demoUrl: "https://dashboard-demo.json-render.dev",
+  },
+  {
+    slug: "no-ai",
+    title: "No AI",
+    description:
+      "Static specs rendered without any AI — forms, cards, tables, and more from hardcoded JSON.",
+    tags: ["React", "Next.js"],
+    githubPath: "examples/no-ai",
+    demoUrl: "https://no-ai-demo.json-render.dev",
+  },
+  {
+    slug: "svelte",
+    title: "Svelte",
+    description:
+      "Svelte renderer demo with counter, todo list, and two-way data binding.",
+    tags: ["Svelte", "Vite"],
+    githubPath: "examples/svelte",
+    demoUrl: "https://svelte-demo.json-render.dev",
+  },
+  {
+    slug: "svelte-chat",
+    title: "Svelte Chat",
+    description: "AI chat app built with SvelteKit and the Svelte renderer.",
+    tags: ["Svelte", "SvelteKit", "AI"],
+    githubPath: "examples/svelte-chat",
+    demoUrl: "https://json-render-svelte-chat-demo.labs.vercel.dev",
+  },
+  {
+    slug: "vue",
+    title: "Vue",
+    description:
+      "Vue renderer demo with counter, todo list, and two-way data binding.",
+    tags: ["Vue", "Vite"],
+    githubPath: "examples/vue",
+    demoUrl: "https://vue-demo.json-render.dev",
+  },
+  {
+    slug: "solid",
+    title: "Solid",
+    description:
+      "Solid renderer demo with counter, todo list, and two-way data binding.",
+    tags: ["Solid", "Vite"],
+    githubPath: "examples/solid",
+    demoUrl: "https://solid-demo.json-render.dev",
+  },
+  {
+    slug: "vite-renderers",
+    title: "Multi-Framework Renderers",
+    description:
+      "Same spec rendered with React, Vue, Svelte, and Solid side by side — hot-swappable at runtime.",
+    tags: ["React", "Vue", "Svelte", "Solid", "Vite"],
+    githubPath: "examples/vite-renderers",
+  },
+  {
+    slug: "react-email",
+    title: "React Email",
+    description:
+      "Generate HTML and plain-text emails from json-render specs using React Email.",
+    tags: ["React", "Email"],
+    githubPath: "examples/react-email",
+    demoUrl: "https://react-email-demo.json-render.dev",
+  },
+  {
+    slug: "react-pdf",
+    title: "React PDF",
+    description:
+      "Generate PDF documents from json-render specs with @react-pdf/renderer.",
+    tags: ["React", "PDF"],
+    githubPath: "examples/react-pdf",
+    demoUrl: "https://react-pdf-demo.json-render.dev",
+  },
+  {
+    slug: "react-three-fiber",
+    title: "React Three Fiber",
+    description:
+      "3D scenes generated from json-render specs using Three.js and React Three Fiber.",
+    tags: ["React", "3D"],
+    githubPath: "examples/react-three-fiber",
+    demoUrl: "https://react-three-fiber-demo.json-render.dev",
+  },
+  {
+    slug: "gsplat",
+    title: "Gaussian Splatting (experimental)",
+    description:
+      "Experimental standalone gaussian splat viewer using gsplat.js — no Three.js dependency.",
+    tags: ["React", "3D", "Next.js"],
+    githubPath: "examples/gsplat",
+  },
+  {
+    slug: "react-three-fiber-gsplat",
+    title: "R3F + Gaussian Splatting",
+    description:
+      "Gaussian splats composed with 3D primitives and lights in React Three Fiber scenes.",
+    tags: ["React", "3D", "Next.js"],
+    githubPath: "examples/react-three-fiber-gsplat",
+  },
+  {
+    slug: "react-native",
+    title: "React Native",
+    description:
+      "Mobile app rendering json-render specs with Expo and React Native.",
+    tags: ["React Native", "Expo"],
+    githubPath: "examples/react-native",
+  },
+  {
+    slug: "remotion",
+    title: "Remotion",
+    description: "Generate videos from json-render specs using Remotion.",
+    tags: ["React", "Video"],
+    githubPath: "examples/remotion",
+    demoUrl: "https://remotion-demo.json-render.dev",
+  },
+  {
+    slug: "image",
+    title: "Image",
+    description:
+      "Generate OG images and social cards from json-render specs using Satori.",
+    tags: ["React", "Image"],
+    githubPath: "examples/image",
+    demoUrl: "https://image-demo.json-render.dev",
+  },
+  {
+    slug: "ink-chat",
+    title: "Ink Chat",
+    description:
+      "Terminal chat agent that streams rich json-render UIs using Ink and the AI Gateway.",
+    tags: ["Ink", "Terminal", "AI"],
+    githubPath: "examples/ink-chat",
+  },
+  {
+    slug: "mcp",
+    title: "MCP App",
+    description:
+      "MCP server that serves shadcn UIs to Claude, ChatGPT, Cursor, and VS Code.",
+    tags: ["React", "MCP", "Vite"],
+    githubPath: "examples/mcp",
+  },
+];
+
+export const allTags = Array.from(
+  new Set(examples.flatMap((e) => e.tags)),
+).sort();
+
+export function getGitHubUrl(example: Example): string {
+  return `${GITHUB_BASE}/${example.slug}`;
+}

apps/web/lib/github.ts

@@ -0,0 +1,20 @@
+const REPO = "vercel-labs/json-render";
+const REVALIDATE = 86400;
+
+export async function getStarCount(): Promise<string> {
+  try {
+    const res = await fetch(`https://api.github.com/repos/${REPO}`, {
+      headers: { Accept: "application/vnd.github.v3+json" },
+      next: { revalidate: REVALIDATE },
+    });
+    if (!res.ok) return "";
+    const data = await res.json();
+    const count = data.stargazers_count;
+    if (typeof count !== "number") return "";
+    if (count >= 1000)
+      return `${(count / 1000).toFixed(count >= 10000 ? 0 : 1)}k`;
+    return String(count);
+  } catch {
+    return "";
+  }
+}

apps/web/lib/page-titles.ts

@@ -11,6 +11,7 @@ export const PAGE_TITLES: Record<string, string> = {
 
   // Top-level
   playground: "Playground",
+  examples: "Examples",
 
   // Docs
   docs: "Introduction",
@@ -42,6 +43,7 @@ export const PAGE_TITLES: Record<string, string> = {
   // API references
   "docs/api/core": "@json-render/core API",
   "docs/api/react": "@json-render/react API",
+  "docs/api/next": "@json-render/next API",
   "docs/api/vue": "@json-render/vue API",
   "docs/api/solid": "@json-render/solid API",
   "docs/api/react-pdf": "@json-render/react-pdf API",
@@ -52,12 +54,15 @@ export const PAGE_TITLES: Record<string, string> = {
   "docs/api/image": "@json-render/image API",
   "docs/api/remotion": "@json-render/remotion API",
   "docs/api/shadcn": "@json-render/shadcn API",
+  "docs/api/shadcn-svelte": "@json-render/shadcn-svelte API",
   "docs/api/mcp": "@json-render/mcp API",
   "docs/api/redux": "@json-render/redux API",
   "docs/api/zustand": "@json-render/zustand API",
   "docs/api/jotai": "@json-render/jotai API",
   "docs/api/react-three-fiber": "@json-render/react-three-fiber API",
   "docs/api/xstate": "@json-render/xstate API",
+  "docs/api/ink": "@json-render/ink API",
+  "docs/api/yaml": "@json-render/yaml API",
 };
 
 /**

apps/web/lib/render/catalog.ts

@@ -165,7 +165,8 @@ export const playgroundCatalog = defineCatalog(schema, {
           .enum(["body", "caption", "muted", "lead", "code"])
           .nullable(),
       }),
-      description: "Paragraph text",
+      description:
+        'Paragraph text. In repeat scopes, use { "$template": "${field1} ${field2}" } to interpolate item fields.',
       example: { text: "Hello, world!" },
     },
 
@@ -178,6 +179,18 @@ export const playgroundCatalog = defineCatalog(schema, {
       description: "Placeholder image (displays alt text in a styled box)",
     },
 
+    Icon: {
+      props: z.object({
+        name: z.string(),
+        size: z.enum(["sm", "md", "lg"]).nullable(),
+        color: z
+          .enum(["default", "muted", "primary", "success", "warning", "danger"])
+          .nullable(),
+      }),
+      description:
+        "Lucide icon by name. PascalCase: MapPin, Mail, Globe, Calendar, Star, Heart, Check, X, ArrowRight, Phone, Building, Clock, Shield, Zap, Users, Eye, Download, Upload, Search, Filter, Settings, Bell, ChevronRight, ExternalLink, Info, AlertTriangle, CheckCircle, XCircle. Use in horizontal Stacks with Text for icon+label patterns. Never use emoji — always use Icon.",
+    },
+
     Avatar: {
       props: z.object({
         src: z.string().nullable(),
@@ -259,8 +272,32 @@ export const playgroundCatalog = defineCatalog(schema, {
         value: z.number(),
         max: z.number().nullable(),
         label: z.string().nullable(),
+        interactive: z.boolean().nullable(),
       }),
-      description: "Star rating display",
+      events: ["change"],
+      description:
+        "Interactive star rating. Use { $bindState } on value for binding. Set interactive: false for read-only display.",
+      example: { value: 4, max: 5, label: "Rating" },
+    },
+
+    Metric: {
+      props: z.object({
+        label: z.string(),
+        value: z.string(),
+        change: z.string().nullable(),
+        changeType: z.enum(["positive", "negative", "neutral"]).nullable(),
+        prefix: z.string().nullable(),
+        suffix: z.string().nullable(),
+      }),
+      description:
+        "Key metric / stat display. Shows a large value with label and optional change indicator. Use for dashboard KPIs.",
+      example: {
+        label: "Total Revenue",
+        value: "125,000",
+        prefix: "$",
+        change: "+12.5%",
+        changeType: "positive",
+      },
     },
 
     // ── Charts ──────────────────────────────────────────────────────────
@@ -411,11 +448,14 @@ export const playgroundCatalog = defineCatalog(schema, {
     Button: {
       props: z.object({
         label: z.string(),
-        variant: z.enum(["primary", "secondary", "danger"]).nullable(),
+        variant: z
+          .enum(["primary", "secondary", "outline", "danger"])
+          .nullable(),
         disabled: z.boolean().nullable(),
       }),
       events: ["press"],
-      description: "Clickable button. Bind on.press for handler.",
+      description:
+        "Clickable button. primary = solid fill, outline = bordered/transparent, secondary = muted fill. Bind on.press for handler.",
       example: { label: "Submit", variant: "primary" },
     },
 

apps/web/lib/render/registry.tsx

@@ -105,6 +105,7 @@ import {
   TooltipProvider,
   TooltipTrigger,
 } from "@/components/ui/tooltip";
+import { icons as lucideIcons } from "lucide-react";
 
 // =============================================================================
 // Registry — components + actions, types inferred from catalog
@@ -127,23 +128,25 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
 
       return (
         <div
-          className={`border border-border rounded-lg p-4 bg-card text-card-foreground overflow-hidden ${maxWidthClass} ${centeredClass}`}
+          className={`border border-border rounded-xl p-5 bg-card text-card-foreground shadow-sm overflow-hidden h-full flex flex-col ${maxWidthClass} ${centeredClass}`}
         >
           {(props.title || props.description) && (
             <div className="mb-4">
               {props.title && (
-                <h3 className="font-semibold text-lg text-left">
+                <h3 className="font-semibold text-lg tracking-tight">
                   {props.title}
                 </h3>
               )}
               {props.description && (
-                <p className="text-sm text-muted-foreground mt-1 text-left">
+                <p className="text-sm text-muted-foreground mt-1">
                   {props.description}
                 </p>
               )}
             </div>
           )}
-          <div className="space-y-3">{children}</div>
+          <div className="flex-1 flex flex-col gap-4 [&>:last-child]:mt-auto">
+            {children}
+          </div>
         </div>
       );
     },
@@ -160,14 +163,31 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
               : props.gap === "none"
                 ? "gap-0"
                 : "gap-3";
-      const alignClass =
-        props.align === "center"
-          ? "items-center"
-          : props.align === "end"
-            ? "items-end"
-            : props.align === "stretch"
-              ? "items-stretch"
-              : "items-start";
+
+      let alignClass: string;
+      if (isHorizontal) {
+        alignClass =
+          props.align === "center"
+            ? "items-center"
+            : props.align === "end"
+              ? "items-end"
+              : props.align === "stretch"
+                ? "items-stretch"
+                : "items-start";
+      } else {
+        // Vertical: items-center/end lets inline elements (Avatar, Badge, Button)
+        // center/align naturally. Block containers (Grid, Accordion, Table) add
+        // their own w-full to stretch regardless.
+        alignClass =
+          props.align === "center"
+            ? "items-center"
+            : props.align === "end"
+              ? "items-end"
+              : props.align === "start"
+                ? "items-start"
+                : "items-stretch";
+      }
+
       const justifyClass =
         props.justify === "center"
           ? "justify-center"
@@ -181,7 +201,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
 
       return (
         <div
-          className={`flex ${isHorizontal ? "flex-row flex-wrap" : "flex-col"} ${gapClass} ${alignClass} ${justifyClass}`}
+          className={`flex ${isHorizontal ? "flex-row flex-wrap" : "flex-col w-full"} ${gapClass} ${alignClass} ${justifyClass}`}
         >
           {children}
         </div>
@@ -189,7 +209,12 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
     },
 
     Grid: ({ props, children }) => {
-      const n = props.columns ?? 1;
+      const childCount = Array.isArray(children)
+        ? children.length
+        : children
+          ? 1
+          : 0;
+      const n = Math.min(props.columns ?? 1, childCount || 1);
       const cols =
         n >= 6
           ? "grid-cols-6"
@@ -205,13 +230,15 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       const gridGap =
         props.gap === "lg" ? "gap-4" : props.gap === "sm" ? "gap-2" : "gap-3";
 
-      return <div className={`grid ${cols} ${gridGap}`}>{children}</div>;
+      return <div className={`grid w-full ${cols} ${gridGap}`}>{children}</div>;
     },
 
     Separator: ({ props }) => (
       <Separator
         orientation={props.orientation ?? "horizontal"}
-        className={props.orientation === "vertical" ? "h-full mx-2" : "my-3"}
+        className={
+          props.orientation === "vertical" ? "h-full mx-3" : "my-4 opacity-50"
+        }
       />
     ),
 
@@ -383,7 +410,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       });
 
       return (
-        <div className="rounded-md border border-border overflow-hidden">
+        <div className="w-full rounded-md border border-border overflow-hidden">
           <TablePrimitive>
             {props.caption && <TableCaption>{props.caption}</TableCaption>}
             <TableHeader>
@@ -411,20 +438,17 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       const level = props.level ?? "h2";
       const headingClass =
         level === "h1"
-          ? "text-2xl font-bold"
+          ? "text-2xl font-bold tracking-tight"
           : level === "h3"
-            ? "text-base font-semibold"
+            ? "text-base font-semibold tracking-tight"
             : level === "h4"
-              ? "text-sm font-semibold"
-              : "text-lg font-semibold";
+              ? "text-sm font-medium uppercase tracking-wider text-muted-foreground"
+              : "text-xl font-semibold tracking-tight";
 
-      if (level === "h1")
-        return <h1 className={`${headingClass} text-left`}>{props.text}</h1>;
-      if (level === "h3")
-        return <h3 className={`${headingClass} text-left`}>{props.text}</h3>;
-      if (level === "h4")
-        return <h4 className={`${headingClass} text-left`}>{props.text}</h4>;
-      return <h2 className={`${headingClass} text-left`}>{props.text}</h2>;
+      if (level === "h1") return <h1 className={headingClass}>{props.text}</h1>;
+      if (level === "h3") return <h3 className={headingClass}>{props.text}</h3>;
+      if (level === "h4") return <h4 className={headingClass}>{props.text}</h4>;
+      return <h2 className={headingClass}>{props.text}</h2>;
     },
 
     Text: ({ props }) => {
@@ -440,20 +464,59 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
                 : "text-sm";
 
       if (props.variant === "code") {
-        return <code className={`${textClass} text-left`}>{props.text}</code>;
+        return <code className={textClass}>{props.text}</code>;
       }
-      return <p className={`${textClass} text-left`}>{props.text}</p>;
+      return <p className={textClass}>{props.text}</p>;
     },
 
     Image: ({ props }) => (
       <div
-        className="bg-muted border border-border rounded flex items-center justify-center text-xs text-muted-foreground aspect-video"
-        style={{ width: props.width ?? 80, height: props.height ?? 60 }}
+        className="w-full bg-muted/50 border border-dashed border-border rounded-lg flex flex-col items-center justify-center gap-2 text-muted-foreground/60 px-4"
+        style={{
+          maxWidth: props.width ?? undefined,
+          height: props.height ?? 120,
+          minHeight: 80,
+        }}
       >
-        {props.alt || "img"}
+        <svg
+          width="32"
+          height="32"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="1.5"
+          strokeLinecap="round"
+          strokeLinejoin="round"
+          className="opacity-50"
+        >
+          <rect width="18" height="18" x="3" y="3" rx="2" ry="2" />
+          <circle cx="9" cy="9" r="2" />
+          <path d="m21 15-3.086-3.086a2 2 0 0 0-2.828 0L6 21" />
+        </svg>
+        {props.alt && <span className="text-xs">{props.alt}</span>}
       </div>
     ),
 
+    Icon: ({ props }) => {
+      const IconComponent = lucideIcons[props.name as keyof typeof lucideIcons];
+      if (!IconComponent) return null;
+      const sizeMap = { sm: 16, md: 20, lg: 24 } as const;
+      const px = sizeMap[props.size ?? "md"] ?? 20;
+      const colorClass =
+        props.color === "muted"
+          ? "text-muted-foreground"
+          : props.color === "primary"
+            ? "text-primary"
+            : props.color === "success"
+              ? "text-green-600 dark:text-green-400"
+              : props.color === "warning"
+                ? "text-yellow-600 dark:text-yellow-400"
+                : props.color === "danger"
+                  ? "text-red-600 dark:text-red-400"
+                  : "";
+      return <IconComponent size={px} className={`shrink-0 ${colorClass}`} />;
+    },
+
     Avatar: ({ props }) => {
       const name = props.name || "?";
       const initials = name
@@ -462,16 +525,16 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
         .join("")
         .slice(0, 2)
         .toUpperCase();
-      const avatarSize =
+      const sizeStyles =
         props.size === "lg"
-          ? "w-12 h-12 text-base"
+          ? { outer: "w-[72px] h-[72px]", text: "text-xl", ring: "ring-[3px]" }
           : props.size === "sm"
-            ? "w-8 h-8 text-xs"
-            : "w-10 h-10 text-sm";
+            ? { outer: "w-8 h-8", text: "text-xs", ring: "ring-2" }
+            : { outer: "w-10 h-10", text: "text-sm", ring: "ring-2" };
 
       return (
         <div
-          className={`${avatarSize} rounded-full bg-muted flex items-center justify-center font-medium`}
+          className={`${sizeStyles.outer} ${sizeStyles.text} rounded-full bg-gradient-to-br from-muted-foreground/20 to-muted flex items-center justify-center font-semibold tracking-wide ${sizeStyles.ring} ring-background shadow-sm`}
         >
           {initials}
         </div>
@@ -491,9 +554,20 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
           : props.variant === "warning"
             ? "bg-yellow-100 text-yellow-800 dark:bg-yellow-900 dark:text-yellow-100"
             : "";
+      const dotColor =
+        props.variant === "success"
+          ? "bg-green-500"
+          : props.variant === "warning"
+            ? "bg-yellow-500"
+            : props.variant === "danger"
+              ? "bg-red-500"
+              : "";
 
       return (
-        <Badge variant={variant} className={customClass}>
+        <Badge variant={variant} className={`${customClass} gap-1.5`}>
+          {dotColor && (
+            <span className={`w-1.5 h-1.5 rounded-full ${dotColor} shrink-0`} />
+          )}
           {props.text}
         </Badge>
       );
@@ -510,8 +584,47 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
               ? "border-blue-200 bg-blue-50 text-blue-900 dark:border-blue-800 dark:bg-blue-950 dark:text-blue-100"
               : "";
 
+      const iconProps = {
+        width: 16,
+        height: 16,
+        viewBox: "0 0 24 24",
+        fill: "none",
+        stroke: "currentColor",
+        strokeWidth: 2,
+        strokeLinecap: "round" as const,
+        strokeLinejoin: "round" as const,
+        className: "shrink-0",
+      };
+
+      const icon =
+        props.type === "success" ? (
+          <svg {...iconProps}>
+            <path d="M22 11.08V12a10 10 0 1 1-5.93-9.14" />
+            <polyline points="22 4 12 14.01 9 11.01" />
+          </svg>
+        ) : props.type === "warning" ? (
+          <svg {...iconProps}>
+            <path d="m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z" />
+            <line x1="12" y1="9" x2="12" y2="13" />
+            <line x1="12" y1="17" x2="12.01" y2="17" />
+          </svg>
+        ) : props.type === "error" ? (
+          <svg {...iconProps}>
+            <circle cx="12" cy="12" r="10" />
+            <line x1="15" y1="9" x2="9" y2="15" />
+            <line x1="9" y1="9" x2="15" y2="15" />
+          </svg>
+        ) : (
+          <svg {...iconProps}>
+            <circle cx="12" cy="12" r="10" />
+            <line x1="12" y1="16" x2="12" y2="12" />
+            <line x1="12" y1="8" x2="12.01" y2="8" />
+          </svg>
+        );
+
       return (
         <Alert variant={variant} className={customClass}>
+          {icon}
           <AlertTitle>{props.title}</AlertTitle>
           {props.message && (
             <AlertDescription>{props.message}</AlertDescription>
@@ -523,7 +636,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
     Progress: ({ props }) => {
       const value = Math.min(100, Math.max(0, props.value || 0));
       return (
-        <div className="space-y-2">
+        <div className="w-full space-y-2">
           {props.label && (
             <Label className="text-sm text-muted-foreground">
               {props.label}
@@ -607,9 +720,19 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       </PopoverPrimitive>
     ),
 
-    Rating: ({ props }) => {
-      const ratingValue = props.value || 0;
+    Rating: ({ props, bindings, emit }) => {
+      const [boundValue, setBoundValue] = useBoundProp<number>(
+        props.value as number | undefined,
+        bindings?.value,
+      );
+      const [localValue, setLocalValue] = useState(props.value || 0);
+      const isBound = !!bindings?.value;
+      const ratingValue = isBound ? (boundValue ?? 0) : localValue;
+      const setValue = isBound ? setBoundValue : setLocalValue;
       const maxRating = props.max ?? 5;
+      const interactive = props.interactive !== false;
+      const [hoverIndex, setHoverIndex] = useState(-1);
+
       return (
         <div className="space-y-2">
           {props.label && (
@@ -617,15 +740,78 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
               {props.label}
             </Label>
           )}
-          <div className="flex gap-1">
-            {Array.from({ length: maxRating }).map((_, i) => (
-              <span
-                key={i}
-                className={`text-lg ${i < ratingValue ? "text-yellow-400" : "text-muted"}`}
-              >
-                *
+          <div
+            className="flex gap-0.5"
+            onMouseLeave={() => interactive && setHoverIndex(-1)}
+          >
+            {Array.from({ length: maxRating }).map((_, i) => {
+              const filled =
+                hoverIndex >= 0 ? i <= hoverIndex : i < ratingValue;
+              return (
+                <button
+                  key={i}
+                  type="button"
+                  className={`p-0.5 transition-colors ${interactive ? "cursor-pointer hover:scale-110" : "cursor-default"}`}
+                  onMouseEnter={() => interactive && setHoverIndex(i)}
+                  onClick={() => {
+                    if (!interactive) return;
+                    const newVal = i + 1 === ratingValue ? 0 : i + 1;
+                    setValue(newVal);
+                    emit("change");
+                  }}
+                >
+                  <svg
+                    width="20"
+                    height="20"
+                    viewBox="0 0 24 24"
+                    fill={filled ? "currentColor" : "none"}
+                    stroke="currentColor"
+                    strokeWidth="1.5"
+                    strokeLinecap="round"
+                    strokeLinejoin="round"
+                    className={
+                      filled ? "text-yellow-400" : "text-muted-foreground/40"
+                    }
+                  >
+                    <polygon points="12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2" />
+                  </svg>
+                </button>
+              );
+            })}
+          </div>
+        </div>
+      );
+    },
+
+    Metric: ({ props }) => {
+      const changeColor =
+        props.changeType === "positive"
+          ? "text-green-600 dark:text-green-400"
+          : props.changeType === "negative"
+            ? "text-red-600 dark:text-red-400"
+            : "text-muted-foreground";
+      const changeIcon =
+        props.changeType === "positive"
+          ? "\u2191"
+          : props.changeType === "negative"
+            ? "\u2193"
+            : "";
+
+      return (
+        <div className="space-y-1">
+          <div className="text-sm text-muted-foreground">{props.label}</div>
+          <div className="flex items-baseline gap-1.5">
+            <span className="text-2xl font-semibold tracking-tight tabular-nums">
+              {props.prefix}
+              {props.value}
+              {props.suffix}
+            </span>
+            {props.change && (
+              <span className={`text-sm font-medium ${changeColor}`}>
+                {changeIcon}
+                {props.change}
               </span>
-            ))}
+            )}
           </div>
         </div>
       );
@@ -636,26 +822,39 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
     BarGraph: ({ props }) => {
       const data = props.data || [];
       const maxValue = Math.max(...data.map((d) => d.value), 1);
+      const barColors = [
+        "bg-primary",
+        "bg-primary/80",
+        "bg-primary/60",
+        "bg-primary/70",
+        "bg-primary/90",
+        "bg-primary/50",
+      ];
 
       return (
-        <div className="space-y-2">
+        <div className="space-y-3">
           {props.title && (
-            <div className="text-sm font-medium text-left">{props.title}</div>
+            <div className="text-sm font-medium">{props.title}</div>
           )}
-          <div className="flex gap-2">
+          <div className="flex items-end gap-2" style={{ height: 160 }}>
             {data.map((d, i) => (
-              <div key={i} className="flex-1 flex flex-col items-center gap-1">
-                <div className="text-xs text-muted-foreground">{d.value}</div>
-                <div className="w-full h-24 flex items-end">
+              <div
+                key={i}
+                className="flex-1 flex flex-col items-center gap-1.5 h-full justify-end group"
+              >
+                <div className="text-[11px] font-medium text-muted-foreground tabular-nums">
+                  {d.value}
+                </div>
+                <div className="w-full flex-1 flex items-end">
                   <div
-                    className="w-full bg-primary rounded-t transition-all"
+                    className={`w-full ${barColors[i % barColors.length]} rounded-t-md transition-all group-hover:opacity-80`}
                     style={{
                       height: `${(d.value / maxValue) * 100}%`,
-                      minHeight: 2,
+                      minHeight: 4,
                     }}
                   />
                 </div>
-                <div className="text-xs text-muted-foreground truncate w-full text-center">
+                <div className="text-[11px] text-muted-foreground truncate w-full text-center">
                   {d.label}
                 </div>
               </div>
@@ -672,8 +871,8 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       const range = maxValue - minValue || 1;
 
       const width = 300;
-      const height = 100;
-      const padding = { top: 10, right: 10, bottom: 10, left: 10 };
+      const height = 140;
+      const padding = { top: 12, right: 12, bottom: 12, left: 12 };
       const chartWidth = width - padding.left - padding.right;
       const chartHeight = height - padding.top - padding.bottom;
 
@@ -690,77 +889,107 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
         return { x, y, ...d };
       });
 
-      const pathD =
-        points.length > 0
-          ? `M ${points.map((p) => `${p.x} ${p.y}`).join(" L ")}`
-          : "";
+      // Build smooth cubic bezier curve through points
+      let smoothPath = "";
+      let areaPath = "";
+      if (points.length > 1) {
+        const first = points[0]!;
+        const last = points[points.length - 1]!;
+        smoothPath = `M ${first.x} ${first.y}`;
+        for (let i = 0; i < points.length - 1; i++) {
+          const curr = points[i]!;
+          const next = points[i + 1]!;
+          const cpx = (curr.x + next.x) / 2;
+          smoothPath += ` C ${cpx} ${curr.y}, ${cpx} ${next.y}, ${next.x} ${next.y}`;
+        }
+        const bottomY = height - padding.bottom;
+        areaPath = `${smoothPath} L ${last.x} ${bottomY} L ${first.x} ${bottomY} Z`;
+      } else if (points.length === 1) {
+        const only = points[0]!;
+        smoothPath = `M ${only.x} ${only.y}`;
+      }
+
+      const gradientId = `line-gradient-${Math.random().toString(36).slice(2, 8)}`;
 
       return (
-        <div className="space-y-2">
+        <div className="space-y-3">
           {props.title && (
-            <div className="text-sm font-medium text-left">{props.title}</div>
+            <div className="text-sm font-medium">{props.title}</div>
           )}
-          <div className="relative h-28">
-            <svg viewBox={`0 0 ${width} ${height}`} className="w-full h-full">
-              <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"
-              />
-              {pathD && (
+          <div className="relative" style={{ height: 160 }}>
+            <svg
+              viewBox={`0 0 ${width} ${height}`}
+              className="w-full h-full"
+              preserveAspectRatio="none"
+            >
+              <defs>
+                <linearGradient id={gradientId} x1="0" y1="0" x2="0" y2="1">
+                  <stop
+                    offset="0%"
+                    stopColor="currentColor"
+                    stopOpacity="0.15"
+                  />
+                  <stop
+                    offset="100%"
+                    stopColor="currentColor"
+                    stopOpacity="0"
+                  />
+                </linearGradient>
+              </defs>
+              {[0, 0.25, 0.5, 0.75, 1].map((frac) => (
+                <line
+                  key={frac}
+                  x1={padding.left}
+                  y1={padding.top + chartHeight * frac}
+                  x2={width - padding.right}
+                  y2={padding.top + chartHeight * frac}
+                  stroke="currentColor"
+                  strokeOpacity="0.07"
+                  vectorEffect="non-scaling-stroke"
+                  strokeWidth="1"
+                />
+              ))}
+              {areaPath && (
                 <path
-                  d={pathD}
+                  d={areaPath}
+                  fill={`url(#${gradientId})`}
+                  className="text-primary"
+                />
+              )}
+              {smoothPath && (
+                <path
+                  d={smoothPath}
                   fill="none"
                   stroke="currentColor"
                   strokeWidth="2"
                   strokeLinecap="round"
                   strokeLinejoin="round"
+                  vectorEffect="non-scaling-stroke"
                   className="text-primary"
                 />
               )}
-              {points.map((p, i) => (
-                <circle
-                  key={i}
-                  cx={p.x}
-                  cy={p.y}
-                  r="4"
-                  className="fill-primary"
-                />
-              ))}
             </svg>
+            {points.map((p, i) => (
+              <div
+                key={i}
+                className="absolute w-[7px] h-[7px] rounded-full bg-primary -translate-x-1/2 -translate-y-1/2"
+                style={{
+                  left: `${(p.x / width) * 100}%`,
+                  top: `${(p.y / height) * 100}%`,
+                }}
+              />
+            ))}
           </div>
-          {data.length > 0 && (
-            <div className="flex justify-between">
-              {data.map((d, i) => (
-                <div
+          {points.length > 0 && (
+            <div className="relative h-4">
+              {points.map((p, i) => (
+                <span
                   key={i}
-                  className="text-xs text-muted-foreground text-center"
-                  style={{ width: `${100 / data.length}%` }}
+                  className="absolute text-[11px] text-muted-foreground -translate-x-1/2"
+                  style={{ left: `${(p.x / width) * 100}%` }}
                 >
-                  {d.label}
-                </div>
+                  {data[i]?.label}
+                </span>
               ))}
             </div>
           )}
@@ -787,7 +1016,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       );
 
       return (
-        <div className="space-y-2">
+        <div className="w-full space-y-2">
           {props.label && <Label htmlFor={props.name}>{props.label}</Label>}
           <Input
             id={props.name}
@@ -829,7 +1058,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       );
 
       return (
-        <div className="space-y-2">
+        <div className="w-full space-y-2">
           {props.label && <Label htmlFor={props.name}>{props.label}</Label>}
           <Textarea
             id={props.name}
@@ -872,7 +1101,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       );
 
       return (
-        <div className="space-y-2">
+        <div className="w-full space-y-2">
           <Label>{props.label}</Label>
           <Select
             value={value}
@@ -945,7 +1174,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       const setValue = isBound ? setBoundValue : setLocalValue;
 
       return (
-        <div className="space-y-2">
+        <div className="w-full space-y-2">
           {props.label && <Label>{props.label}</Label>}
           <RadioGroup
             value={value}
@@ -987,7 +1216,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       const setChecked = isBound ? setBoundChecked : setLocalChecked;
 
       return (
-        <div className="flex items-center justify-between space-x-2">
+        <div className="w-full flex items-center justify-between space-x-2">
           <Label htmlFor={props.name} className="cursor-pointer">
             {props.label}
           </Label>
@@ -1014,7 +1243,7 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       const setValue = isBound ? setBoundValue : setLocalValue;
 
       return (
-        <div className="space-y-2">
+        <div className="w-full space-y-2">
           {props.label && (
             <div className="flex justify-between">
               <Label className="text-sm">{props.label}</Label>
@@ -1041,9 +1270,11 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
       const variant =
         props.variant === "danger"
           ? "destructive"
-          : props.variant === "secondary"
-            ? "secondary"
-            : "default";
+          : props.variant === "outline"
+            ? "outline"
+            : props.variant === "secondary"
+              ? "secondary"
+              : "default";
 
       return (
         <Button

apps/web/lib/search-index.ts

@@ -0,0 +1,76 @@
+import { readFile } from "fs/promises";
+import { join } from "path";
+import { docsNavigation } from "./docs-navigation";
+import { mdxToCleanMarkdown } from "./mdx-to-markdown";
+
+export type IndexEntry = {
+  title: string;
+  href: string;
+  section: string;
+  content: string;
+};
+
+let cached: IndexEntry[] | null = null;
+
+function stripMarkdown(md: string): string {
+  return (
+    md
+      // Remove fenced code blocks entirely
+      .replace(/```[\s\S]*?```/g, "")
+      // Remove inline code
+      .replace(/`[^`]+`/g, "")
+      // Remove markdown links, keep text
+      .replace(/\[([^\]]+)\]\([^)]+\)/g, "$1")
+      // Remove heading markers
+      .replace(/^#{1,6}\s+/gm, "")
+      // Remove bold/italic markers
+      .replace(/\*{1,3}([^*]+)\*{1,3}/g, "$1")
+      // Remove HTML tags
+      .replace(/<[^>]+>/g, "")
+      // Collapse whitespace
+      .replace(/\n{3,}/g, "\n\n")
+      .trim()
+  );
+}
+
+function mdxFileForSlug(slug: string): string {
+  const docsRoot = join(process.cwd(), "app", "(main)", "docs");
+  if (slug === "/docs") {
+    return join(docsRoot, "page.mdx");
+  }
+  const rest = slug.replace(/^\/docs\/?/, "");
+  return join(docsRoot, ...rest.split("/"), "page.mdx");
+}
+
+export async function getSearchIndex(): Promise<IndexEntry[]> {
+  if (cached) return cached;
+
+  const entries: IndexEntry[] = [];
+
+  for (const section of docsNavigation) {
+    for (const item of section.items) {
+      if (item.external) continue;
+      try {
+        const raw = await readFile(mdxFileForSlug(item.href), "utf-8");
+        const md = mdxToCleanMarkdown(raw);
+        const content = stripMarkdown(md);
+        entries.push({
+          title: item.title,
+          href: item.href,
+          section: section.title,
+          content,
+        });
+      } catch {
+        entries.push({
+          title: item.title,
+          href: item.href,
+          section: section.title,
+          content: "",
+        });
+      }
+    }
+  }
+
+  cached = entries;
+  return entries;
+}

apps/web/lib/spec-patch.ts

@@ -0,0 +1,155 @@
+import type { Spec, JsonPatch } from "@json-render/core";
+import { setByPath, getByPath, removeByPath } from "@json-render/core";
+
+export function setSpecValue(
+  newSpec: Spec,
+  path: string,
+  value: unknown,
+): void {
+  if (path === "/root") {
+    newSpec.root = value as string;
+    return;
+  }
+  if (path === "/state") {
+    newSpec.state = value as Record<string, unknown>;
+    return;
+  }
+  if (path.startsWith("/state/")) {
+    if (!newSpec.state) newSpec.state = {};
+    setByPath(
+      newSpec.state as Record<string, unknown>,
+      path.slice("/state".length),
+      value,
+    );
+    return;
+  }
+  if (path.startsWith("/elements/")) {
+    const pathParts = path.slice("/elements/".length).split("/");
+    const elementKey = pathParts[0];
+    if (!elementKey) return;
+    if (pathParts.length === 1) {
+      if (value == null || typeof value !== "object") return;
+      const el = value as Record<string, unknown>;
+      newSpec.elements[elementKey] = {
+        ...el,
+        type: typeof el.type === "string" ? el.type : "",
+        props: el.props != null && typeof el.props === "object" ? el.props : {},
+        children: Array.isArray(el.children) ? el.children : [],
+      } as Spec["elements"][string];
+    } else {
+      const element = newSpec.elements[elementKey];
+      if (element) {
+        const newElement = { ...element };
+        setByPath(
+          newElement as unknown as Record<string, unknown>,
+          "/" + pathParts.slice(1).join("/"),
+          value,
+        );
+        newSpec.elements[elementKey] = newElement;
+      }
+    }
+  }
+}
+
+export function removeSpecValue(newSpec: Spec, path: string): void {
+  if (path === "/state") {
+    delete newSpec.state;
+    return;
+  }
+  if (path.startsWith("/state/") && newSpec.state) {
+    removeByPath(
+      newSpec.state as Record<string, unknown>,
+      path.slice("/state".length),
+    );
+    return;
+  }
+  if (path.startsWith("/elements/")) {
+    const pathParts = path.slice("/elements/".length).split("/");
+    const elementKey = pathParts[0];
+    if (!elementKey) return;
+    if (pathParts.length === 1) {
+      delete newSpec.elements[elementKey];
+    } else {
+      const element = newSpec.elements[elementKey];
+      if (element) {
+        const newElement = { ...element };
+        removeByPath(
+          newElement as unknown as Record<string, unknown>,
+          "/" + pathParts.slice(1).join("/"),
+        );
+        newSpec.elements[elementKey] = newElement;
+      }
+    }
+  }
+}
+
+export function getSpecValue(spec: Spec, path: string): unknown {
+  if (path === "/root") return spec.root;
+  if (path === "/state") return spec.state;
+  if (path.startsWith("/state/") && spec.state) {
+    return getByPath(
+      spec.state as Record<string, unknown>,
+      path.slice("/state".length),
+    );
+  }
+  return getByPath(spec as unknown as Record<string, unknown>, path);
+}
+
+export function normalizeSpec(spec: Spec): void {
+  if (
+    spec.state === null ||
+    (spec.state !== undefined && typeof spec.state !== "object")
+  ) {
+    spec.state = undefined;
+  }
+
+  for (const key of Object.keys(spec.elements)) {
+    const el = spec.elements[key];
+    if (!el || typeof el !== "object") {
+      delete spec.elements[key];
+      continue;
+    }
+    if (el.props == null || typeof el.props !== "object") {
+      spec.elements[key] = { ...el, props: {} } as Spec["elements"][string];
+    }
+    if (!Array.isArray(spec.elements[key]!.children)) {
+      spec.elements[key] = {
+        ...spec.elements[key]!,
+        children: [],
+      } as Spec["elements"][string];
+    }
+  }
+}
+
+export function applySpecPatch(spec: Spec, patch: JsonPatch): Spec {
+  const newSpec = {
+    ...spec,
+    elements: { ...spec.elements },
+    ...(spec.state ? { state: { ...spec.state } } : {}),
+  };
+  switch (patch.op) {
+    case "add":
+    case "replace":
+      setSpecValue(newSpec, patch.path, patch.value);
+      break;
+    case "remove":
+      removeSpecValue(newSpec, patch.path);
+      break;
+    case "move":
+      if (patch.from) {
+        const moveValue = getSpecValue(newSpec, patch.from);
+        removeSpecValue(newSpec, patch.from);
+        setSpecValue(newSpec, patch.path, moveValue);
+      }
+      break;
+    case "copy":
+      if (patch.from) {
+        setSpecValue(newSpec, patch.path, getSpecValue(newSpec, patch.from));
+      }
+      break;
+    case "test":
+      break;
+  }
+  normalizeSpec(newSpec);
+  return newSpec;
+}

apps/web/lib/use-playground-stream.ts

@@ -0,0 +1,482 @@
+"use client";
+
+import { useState, useCallback, useRef, useEffect } from "react";
+import type { Spec, JsonPatch, EditMode } from "@json-render/core";
+import { deepMergeSpec, diffToPatches } from "@json-render/core";
+import { parse as yamlParse, stringify as yamlStringify } from "yaml";
+import { applyPatch as applyUnifiedDiff } from "diff";
+import {
+  createYamlStreamCompiler,
+  YAML_SPEC_FENCE,
+  YAML_EDIT_FENCE,
+  YAML_PATCH_FENCE,
+  DIFF_FENCE,
+  FENCE_CLOSE,
+} from "@json-render/yaml";
+import { applySpecPatch } from "./spec-patch";
+
+export type StreamFormat = "jsonl" | "yaml";
+
+export interface TokenUsage {
+  promptTokens: number;
+  completionTokens: number;
+  totalTokens: number;
+  cachedTokens: number;
+  cacheWriteTokens: number;
+}
+
+export interface UsePlaygroundStreamOptions {
+  api: string;
+  format: StreamFormat;
+  editModes?: EditMode[];
+  onError?: (error: Error) => void;
+  onComplete?: (spec: Spec) => void;
+}
+
+export interface UsePlaygroundStreamReturn {
+  spec: Spec | null;
+  isStreaming: boolean;
+  error: Error | null;
+  usage: TokenUsage | null;
+  rawLines: string[];
+  send: (prompt: string, context?: Record<string, unknown>) => Promise<void>;
+  clear: () => void;
+}
+
+// ── JSONL helpers ──
+
+type ParsedLine =
+  | { type: "patch"; patch: JsonPatch }
+  | { type: "usage"; usage: TokenUsage }
+  | { type: "json-edit"; mergeObj: Record<string, unknown> }
+  | null;
+
+function parseLine(line: string): ParsedLine {
+  try {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith("//")) return null;
+    const parsed = JSON.parse(trimmed);
+    if (parsed.__meta === "usage") {
+      return {
+        type: "usage",
+        usage: {
+          promptTokens: parsed.promptTokens ?? 0,
+          completionTokens: parsed.completionTokens ?? 0,
+          totalTokens: parsed.totalTokens ?? 0,
+          cachedTokens: parsed.cachedTokens ?? 0,
+          cacheWriteTokens: parsed.cacheWriteTokens ?? 0,
+        },
+      };
+    }
+    if (parsed.__json_edit === true) {
+      const mergeObj = { ...parsed };
+      delete mergeObj.__json_edit;
+      return { type: "json-edit", mergeObj };
+    }
+    return { type: "patch", patch: parsed as JsonPatch };
+  } catch {
+    return null;
+  }
+}
+
+type FenceState = "outside" | "yaml-spec" | "yaml-edit" | "yaml-patch" | "diff";
+
+// ── Hook ──
+
+export function usePlaygroundStream({
+  api,
+  format,
+  editModes,
+  onError,
+  onComplete,
+}: UsePlaygroundStreamOptions): UsePlaygroundStreamReturn {
+  const [spec, setSpec] = useState<Spec | null>(null);
+  const [isStreaming, setIsStreaming] = useState(false);
+  const [error, setError] = useState<Error | null>(null);
+  const [usage, setUsage] = useState<TokenUsage | null>(null);
+  const [rawLines, setRawLines] = useState<string[]>([]);
+  const rawLinesRef = useRef<string[]>([]);
+  const abortControllerRef = useRef<AbortController | null>(null);
+
+  const onCompleteRef = useRef(onComplete);
+  onCompleteRef.current = onComplete;
+  const onErrorRef = useRef(onError);
+  onErrorRef.current = onError;
+  const formatRef = useRef(format);
+  formatRef.current = format;
+  const editModesRef = useRef(editModes);
+  editModesRef.current = editModes;
+
+  const clear = useCallback(() => {
+    setSpec(null);
+    setError(null);
+  }, []);
+
+  const send = useCallback(
+    async (prompt: string, context?: Record<string, unknown>) => {
+      abortControllerRef.current = new AbortController();
+
+      setIsStreaming(true);
+      setError(null);
+      setUsage(null);
+      rawLinesRef.current = [];
+      setRawLines([]);
+
+      const previousSpec = context?.previousSpec as Spec | undefined;
+      let currentSpec: Spec =
+        previousSpec && previousSpec.root
+          ? { ...previousSpec, elements: { ...previousSpec.elements } }
+          : { root: "", elements: {} };
+      setSpec(currentSpec);
+
+      try {
+        const response = await fetch(api, {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify({
+            prompt,
+            context,
+            format: formatRef.current,
+            editModes: editModesRef.current,
+          }),
+          signal: abortControllerRef.current.signal,
+        });
+
+        if (!response.ok) {
+          let errorMessage = `HTTP error: ${response.status}`;
+          try {
+            const errorData = await response.json();
+            if (errorData.message) errorMessage = errorData.message;
+            else if (errorData.error) errorMessage = errorData.error;
+          } catch {
+            // use default
+          }
+          throw new Error(errorMessage);
+        }
+
+        const reader = response.body?.getReader();
+        if (!reader) throw new Error("No response body");
+
+        const decoder = new TextDecoder();
+        let buffer = "";
+
+        if (formatRef.current === "yaml") {
+          // ── YAML streaming ──
+          let fenceState: FenceState = "outside";
+          const compiler = createYamlStreamCompiler<Record<string, unknown>>();
+          let yamlEditAccumulated = "";
+          let yamlPatchAccumulated = "";
+          let diffAccumulated = "";
+
+          while (true) {
+            const { done, value } = await reader.read();
+            if (done) break;
+
+            buffer += decoder.decode(value, { stream: true });
+            const lines = buffer.split("\n");
+            buffer = lines.pop() ?? "";
+
+            for (const line of lines) {
+              const trimmed = line.trim();
+
+              // Check for usage metadata (appended after stream)
+              if (trimmed.startsWith("{") && trimmed.includes('"__meta"')) {
+                try {
+                  const parsed = JSON.parse(trimmed);
+                  if (parsed.__meta === "usage") {
+                    setUsage({
+                      promptTokens: parsed.promptTokens ?? 0,
+                      completionTokens: parsed.completionTokens ?? 0,
+                      totalTokens: parsed.totalTokens ?? 0,
+                      cachedTokens: parsed.cachedTokens ?? 0,
+                      cacheWriteTokens: parsed.cacheWriteTokens ?? 0,
+                    });
+                    continue;
+                  }
+                } catch {
+                  // not JSON
+                }
+              }
+
+              rawLinesRef.current.push(line);
+
+              if (fenceState === "outside") {
+                if (
+                  trimmed === YAML_SPEC_FENCE ||
+                  trimmed.startsWith(YAML_SPEC_FENCE + " ")
+                ) {
+                  fenceState = "yaml-spec";
+                  compiler.reset();
+                } else if (
+                  trimmed === YAML_EDIT_FENCE ||
+                  trimmed.startsWith(YAML_EDIT_FENCE + " ")
+                ) {
+                  fenceState = "yaml-edit";
+                  yamlEditAccumulated = "";
+                } else if (
+                  trimmed === YAML_PATCH_FENCE ||
+                  trimmed.startsWith(YAML_PATCH_FENCE + " ")
+                ) {
+                  fenceState = "yaml-patch";
+                  yamlPatchAccumulated = "";
+                } else if (
+                  trimmed === DIFF_FENCE ||
+                  trimmed.startsWith(DIFF_FENCE + " ")
+                ) {
+                  fenceState = "diff";
+                  diffAccumulated = "";
+                }
+              } else if (trimmed === FENCE_CLOSE || trimmed === "````") {
+                if (fenceState === "yaml-spec") {
+                  const { result, newPatches } = compiler.flush();
+                  if (result && typeof result === "object" && result.root) {
+                    for (const patch of newPatches) {
+                      currentSpec = applySpecPatch(currentSpec, patch);
+                    }
+                    setSpec({ ...currentSpec });
+                  }
+                } else if (fenceState === "yaml-edit") {
+                  try {
+                    const editObj = yamlParse(yamlEditAccumulated);
+                    if (editObj && typeof editObj === "object") {
+                      const merged = deepMergeSpec(
+                        currentSpec as unknown as Record<string, unknown>,
+                        editObj as Record<string, unknown>,
+                      );
+                      const patches = diffToPatches(
+                        currentSpec as unknown as Record<string, unknown>,
+                        merged,
+                      );
+                      for (const patch of patches) {
+                        currentSpec = applySpecPatch(currentSpec, patch);
+                      }
+                      setSpec({ ...currentSpec });
+                    }
+                  } catch {
+                    // Invalid YAML edit
+                  }
+                } else if (fenceState === "yaml-patch") {
+                  for (const patchLine of yamlPatchAccumulated.split("\n")) {
+                    const t = patchLine.trim();
+                    if (!t) continue;
+                    try {
+                      const patch = JSON.parse(t) as JsonPatch;
+                      if (patch.op) {
+                        currentSpec = applySpecPatch(currentSpec, patch);
+                      }
+                    } catch {
+                      // Skip invalid JSON lines
+                    }
+                  }
+                  setSpec({ ...currentSpec });
+                } else if (fenceState === "diff") {
+                  try {
+                    const specYaml = yamlStringify(currentSpec, { indent: 2 });
+                    const patched = applyUnifiedDiff(specYaml, diffAccumulated);
+                    if (typeof patched === "string") {
+                      const parsed = yamlParse(patched);
+                      if (parsed && typeof parsed === "object") {
+                        const patches = diffToPatches(
+                          currentSpec as unknown as Record<string, unknown>,
+                          parsed as Record<string, unknown>,
+                        );
+                        for (const patch of patches) {
+                          currentSpec = applySpecPatch(currentSpec, patch);
+                        }
+                        setSpec({ ...currentSpec });
+                      }
+                    }
+                  } catch {
+                    // Diff apply or reparse failed
+                  }
+                }
+                fenceState = "outside";
+              } else if (fenceState === "yaml-spec") {
+                const { newPatches } = compiler.push(line + "\n");
+                if (newPatches.length > 0) {
+                  for (const patch of newPatches) {
+                    currentSpec = applySpecPatch(currentSpec, patch);
+                  }
+                  setSpec({ ...currentSpec });
+                }
+              } else if (fenceState === "yaml-edit") {
+                yamlEditAccumulated += line + "\n";
+              } else if (fenceState === "yaml-patch") {
+                yamlPatchAccumulated += line + "\n";
+              } else if (fenceState === "diff") {
+                diffAccumulated += line + "\n";
+              }
+            }
+            setRawLines([...rawLinesRef.current]);
+          }
+
+          // Process remaining buffer
+          if (buffer.trim()) {
+            const trimmed = buffer.trim();
+            if (trimmed.startsWith("{") && trimmed.includes('"__meta"')) {
+              try {
+                const parsed = JSON.parse(trimmed);
+                if (parsed.__meta === "usage") {
+                  setUsage({
+                    promptTokens: parsed.promptTokens ?? 0,
+                    completionTokens: parsed.completionTokens ?? 0,
+                    totalTokens: parsed.totalTokens ?? 0,
+                    cachedTokens: parsed.cachedTokens ?? 0,
+                    cacheWriteTokens: parsed.cacheWriteTokens ?? 0,
+                  });
+                }
+              } catch {
+                // not JSON
+              }
+            } else if (fenceState === "yaml-spec") {
+              compiler.push(buffer);
+              const { result, newPatches } = compiler.flush();
+              if (result && typeof result === "object" && result.root) {
+                for (const patch of newPatches) {
+                  currentSpec = applySpecPatch(currentSpec, patch);
+                }
+                setSpec({ ...currentSpec });
+              }
+            }
+          }
+        } else {
+          // ── JSONL streaming ──
+          let jsonlDiffState: "outside" | "diff" = "outside";
+          let jsonlDiffAccumulated = "";
+
+          while (true) {
+            const { done, value } = await reader.read();
+            if (done) break;
+
+            buffer += decoder.decode(value, { stream: true });
+            const lines = buffer.split("\n");
+            buffer = lines.pop() ?? "";
+
+            for (const line of lines) {
+              const trimmed = line.trim();
+              if (!trimmed) continue;
+
+              // Diff fence detection within JSONL mode
+              if (jsonlDiffState === "outside") {
+                if (
+                  trimmed === DIFF_FENCE ||
+                  trimmed.startsWith(DIFF_FENCE + " ")
+                ) {
+                  jsonlDiffState = "diff";
+                  jsonlDiffAccumulated = "";
+                  continue;
+                }
+              } else if (
+                jsonlDiffState === "diff" &&
+                (trimmed === FENCE_CLOSE || trimmed === "````")
+              ) {
+                try {
+                  const specJson = JSON.stringify(currentSpec, null, 2);
+                  const patched = applyUnifiedDiff(
+                    specJson,
+                    jsonlDiffAccumulated,
+                  );
+                  if (typeof patched === "string") {
+                    const parsed = JSON.parse(patched);
+                    if (parsed && typeof parsed === "object") {
+                      const patches = diffToPatches(
+                        currentSpec as unknown as Record<string, unknown>,
+                        parsed as Record<string, unknown>,
+                      );
+                      for (const patch of patches) {
+                        currentSpec = applySpecPatch(currentSpec, patch);
+                      }
+                      setSpec({ ...currentSpec });
+                    }
+                  }
+                } catch {
+                  // Diff apply failed
+                }
+                jsonlDiffState = "outside";
+                continue;
+              }
+
+              if (jsonlDiffState === "diff") {
+                jsonlDiffAccumulated += line + "\n";
+                rawLinesRef.current.push(line);
+                continue;
+              }
+
+              // Standard JSONL line parsing
+              const result = parseLine(trimmed);
+              if (!result) continue;
+              if (result.type === "usage") {
+                setUsage(result.usage);
+              } else if (result.type === "json-edit") {
+                const merged = deepMergeSpec(
+                  currentSpec as unknown as Record<string, unknown>,
+                  result.mergeObj,
+                );
+                const patches = diffToPatches(
+                  currentSpec as unknown as Record<string, unknown>,
+                  merged,
+                );
+                for (const patch of patches) {
+                  currentSpec = applySpecPatch(currentSpec, patch);
+                }
+                rawLinesRef.current.push(trimmed);
+                setSpec({ ...currentSpec });
+              } else {
+                rawLinesRef.current.push(trimmed);
+                currentSpec = applySpecPatch(currentSpec, result.patch);
+                setSpec({ ...currentSpec });
+              }
+            }
+            setRawLines([...rawLinesRef.current]);
+          }
+
+          if (buffer.trim()) {
+            const trimmed = buffer.trim();
+            const result = parseLine(trimmed);
+            if (result) {
+              if (result.type === "usage") {
+                setUsage(result.usage);
+              } else if (result.type === "json-edit") {
+                const merged = deepMergeSpec(
+                  currentSpec as unknown as Record<string, unknown>,
+                  result.mergeObj,
+                );
+                const patches = diffToPatches(
+                  currentSpec as unknown as Record<string, unknown>,
+                  merged,
+                );
+                for (const patch of patches) {
+                  currentSpec = applySpecPatch(currentSpec, patch);
+                }
+                rawLinesRef.current.push(trimmed);
+                setSpec({ ...currentSpec });
+              } else {
+                rawLinesRef.current.push(trimmed);
+                currentSpec = applySpecPatch(currentSpec, result.patch);
+                setSpec({ ...currentSpec });
+              }
+            }
+          }
+        }
+
+        onCompleteRef.current?.(currentSpec);
+      } catch (err) {
+        if ((err as Error).name === "AbortError") return;
+        const error = err instanceof Error ? err : new Error(String(err));
+        setError(error);
+        onErrorRef.current?.(error);
+      } finally {
+        setIsStreaming(false);
+      }
+    },
+    [api],
+  );
+
+  useEffect(() => {
+    return () => {
+      abortControllerRef.current?.abort();
+    };
+  }, []);
+
+  return { spec, isStreaming, error, usage, rawLines, send, clear };
+}

apps/web/mdx-components.tsx

@@ -35,16 +35,26 @@ export function useMDXComponents(components: MDXComponents): MDXComponents {
     h2: ({ children }: { children?: React.ReactNode }) => {
       const id = slugify(extractText(children));
       return (
-        <h2 id={id} className="text-xl font-semibold mt-12 mb-4">
-          {children}
+        <h2 id={id} className="group text-xl font-semibold mt-12 mb-4">
+          <a href={`#${id}`} className="no-underline hover:no-underline">
+            {children}
+            <span className="ml-2 text-muted-foreground/0 group-hover:text-muted-foreground transition-colors select-none">
+              #
+            </span>
+          </a>
         </h2>
       );
     },
     h3: ({ children }: { children?: React.ReactNode }) => {
       const id = slugify(extractText(children));
       return (
-        <h3 id={id} className="text-lg font-medium mt-8 mb-3">
-          {children}
+        <h3 id={id} className="group text-lg font-medium mt-8 mb-3">
+          <a href={`#${id}`} className="no-underline hover:no-underline">
+            {children}
+            <span className="ml-2 text-muted-foreground/0 group-hover:text-muted-foreground transition-colors select-none">
+              #
+            </span>
+          </a>
         </h3>
       );
     },

apps/web/package.json

@@ -1,6 +1,6 @@
 {
   "name": "web",
-  "version": "0.1.7",
+  "version": "0.1.11",
   "type": "module",
   "private": true,
   "license": "Apache-2.0",
@@ -18,6 +18,7 @@
     "@json-render/codegen": "workspace:*",
     "@json-render/core": "workspace:*",
     "@json-render/react": "workspace:*",
+    "@json-render/yaml": "workspace:*",
     "@mdx-js/loader": "^3.1.1",
     "@mdx-js/mdx": "^3.1.1",
     "@mdx-js/react": "^3.1.1",
@@ -34,9 +35,9 @@
     "bash-tool": "1.3.14",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
+    "diff": "^8.0.3",
     "embla-carousel-react": "^8.6.0",
     "geist": "1.7.0",
-    "just-bash": "2.9.6",
     "lucide-react": "^0.562.0",
     "next": "16.1.1",
     "next-themes": "^0.4.6",
@@ -51,6 +52,7 @@
     "tailwind-merge": "^3.4.0",
     "unist-util-visit": "5.1.0",
     "vaul": "^1.1.2",
+    "yaml": "^2.8.2",
     "zod": "^4.3.6"
   },
   "devDependencies": {

examples/chat/.env.example

@@ -0,0 +1,15 @@
+# Vercel AI Gateway
+# Automatically authenticated when deployed on Vercel
+# For local development, get your key from https://vercel.com/ai-gateway
+AI_GATEWAY_API_KEY=
+
+# AI Model Configuration
+# Default: anthropic/claude-haiku-4.5
+AI_GATEWAY_MODEL=anthropic/claude-haiku-4.5
+
+# Rate Limiting (Upstash Redis)
+# Optional - rate limiting is disabled when these are not set
+KV_REST_API_URL=
+KV_REST_API_TOKEN=
+RATE_LIMIT_PER_MINUTE=10
+RATE_LIMIT_PER_DAY=100

examples/chat/CHANGELOG.md

@@ -1,5 +1,41 @@
 # example-chat
 
+## 0.1.11
+
+### Patch Changes
+
+- Updated dependencies [519a538]
+  - @json-render/core@0.16.0
+  - @json-render/react@0.16.0
+  - @json-render/shadcn@0.16.0
+
+## 0.1.10
+
+### Patch Changes
+
+- Updated dependencies [bf3a7ec]
+  - @json-render/core@0.15.0
+  - @json-render/react@0.15.0
+  - @json-render/shadcn@0.15.0
+
+## 0.1.9
+
+### Patch Changes
+
+- Updated dependencies [43b7515]
+  - @json-render/core@0.14.1
+  - @json-render/react@0.14.1
+  - @json-render/shadcn@0.14.1
+
+## 0.1.8
+
+### Patch Changes
+
+- Updated dependencies [a8afd8b]
+  - @json-render/core@0.14.0
+  - @json-render/react@0.14.0
+  - @json-render/shadcn@0.14.0
+
 ## 0.1.7
 
 ### Patch Changes

examples/chat/app/api/generate/route.ts

@@ -1,4 +1,5 @@
 import { agent } from "@/lib/agent";
+import { minuteRateLimit, dailyRateLimit } from "@/lib/rate-limit";
 import {
   convertToModelMessages,
   createUIMessageStream,
@@ -6,10 +7,35 @@ import {
   type UIMessage,
 } from "ai";
 import { pipeJsonRender } from "@json-render/core";
+import { headers } from "next/headers";
 
 export const maxDuration = 60;
 
 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 body = await req.json();
   const uiMessages: UIMessage[] = body.messages;
 

examples/chat/lib/rate-limit.ts

@@ -0,0 +1,57 @@
+import { Ratelimit } from "@upstash/ratelimit";
+import { Redis } from "@upstash/redis";
+
+// Lazy initialization to avoid errors when Redis env vars are not configured
+let _minuteRateLimit: Ratelimit | null = null;
+let _dailyRateLimit: Ratelimit | null = null;
+
+function getRedis(): Redis | null {
+  const url = process.env.KV_REST_API_URL;
+  const token = process.env.KV_REST_API_TOKEN;
+
+  if (!url || !token) {
+    return null;
+  }
+
+  return new Redis({ url, token });
+}
+
+// No-op rate limiter for when Redis is not configured
+const noopRateLimiter = {
+  limit: async () => ({ success: true, limit: 0, remaining: 0, reset: 0 }),
+};
+
+const MINUTE_LIMIT = Number(process.env.RATE_LIMIT_PER_MINUTE) || 10;
+const DAILY_LIMIT = Number(process.env.RATE_LIMIT_PER_DAY) || 100;
+
+// Requests per minute (sliding window)
+export const minuteRateLimit = {
+  limit: async (identifier: string) => {
+    if (!_minuteRateLimit) {
+      const redis = getRedis();
+      if (!redis) return noopRateLimiter.limit();
+      _minuteRateLimit = new Ratelimit({
+        redis,
+        limiter: Ratelimit.slidingWindow(MINUTE_LIMIT, "1 m"),
+        prefix: "ratelimit:chat:minute",
+      });
+    }
+    return _minuteRateLimit.limit(identifier);
+  },
+};
+
+// Requests per day (fixed window)
+export const dailyRateLimit = {
+  limit: async (identifier: string) => {
+    if (!_dailyRateLimit) {
+      const redis = getRedis();
+      if (!redis) return noopRateLimiter.limit();
+      _dailyRateLimit = new Ratelimit({
+        redis,
+        limiter: Ratelimit.fixedWindow(DAILY_LIMIT, "1 d"),
+        prefix: "ratelimit:chat:daily",
+      });
+    }
+    return _dailyRateLimit.limit(identifier);
+  },
+};

examples/chat/package.json

@@ -1,6 +1,6 @@
 {
   "name": "example-chat",
-  "version": "0.1.7",
+  "version": "0.1.11",
   "type": "module",
   "private": true,
   "scripts": {
@@ -34,6 +34,8 @@
     "streamdown": "^2.2.0",
     "tailwind-merge": "^3.4.0",
     "three": "^0.182.0",
+    "@upstash/ratelimit": "^2.0.8",
+    "@upstash/redis": "^1.37.0",
     "zod": "4.3.6"
   },
   "devDependencies": {

examples/dashboard/.env.example

@@ -4,3 +4,10 @@ DATABASE_URL=postgresql://postgres:postgres@localhost:5432/json_render_dashboard
 # AI (optional - for UI generation)
 AI_GATEWAY_API_KEY=
 AI_GATEWAY_MODEL=anthropic/claude-haiku-4.5
+
+# Rate Limiting (Upstash Redis)
+# Optional - rate limiting is disabled when these are not set
+KV_REST_API_URL=
+KV_REST_API_TOKEN=
+RATE_LIMIT_PER_MINUTE=10
+RATE_LIMIT_PER_DAY=100

examples/dashboard/CHANGELOG.md

@@ -1,5 +1,41 @@
 # example-dashboard
 
+## 0.1.11
+
+### Patch Changes
+
+- Updated dependencies [519a538]
+  - @json-render/core@0.16.0
+  - @json-render/codegen@0.16.0
+  - @json-render/react@0.16.0
+
+## 0.1.10
+
+### Patch Changes
+
+- Updated dependencies [bf3a7ec]
+  - @json-render/core@0.15.0
+  - @json-render/codegen@0.15.0
+  - @json-render/react@0.15.0
+
+## 0.1.9
+
+### Patch Changes
+
+- Updated dependencies [43b7515]
+  - @json-render/core@0.14.1
+  - @json-render/codegen@0.14.1
+  - @json-render/react@0.14.1
+
+## 0.1.8
+
+### Patch Changes
+
+- Updated dependencies [a8afd8b]
+  - @json-render/core@0.14.0
+  - @json-render/codegen@0.14.0
+  - @json-render/react@0.14.0
+
 ## 0.1.7
 
 ### Patch Changes

examples/dashboard/app/api/generate/route.ts

@@ -1,6 +1,8 @@
 import { streamText } from "ai";
 import { buildUserPrompt } from "@json-render/core";
 import { dashboardCatalog } from "@/lib/render/catalog";
+import { minuteRateLimit, dailyRateLimit } from "@/lib/rate-limit";
+import { headers } from "next/headers";
 
 export const maxDuration = 30;
 
@@ -9,6 +11,30 @@ const SYSTEM_PROMPT = dashboardCatalog.prompt();
 const DEFAULT_MODEL = "anthropic/claude-haiku-4.5";
 
 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 { prompt, context } = await req.json();
 
   const userPrompt = buildUserPrompt({

examples/dashboard/components/header.tsx

@@ -47,7 +47,7 @@ export function Header() {
         </div>
         <nav className="flex items-center gap-4">
           <a
-            href="https://json-render.vercel.app"
+            href="https://json-render.dev"
             target="_blank"
             rel="noopener noreferrer"
             className="text-sm text-muted-foreground hover:text-foreground transition-colors"

examples/dashboard/lib/rate-limit.ts

@@ -0,0 +1,57 @@
+import { Ratelimit } from "@upstash/ratelimit";
+import { Redis } from "@upstash/redis";
+
+// Lazy initialization to avoid errors when Redis env vars are not configured
+let _minuteRateLimit: Ratelimit | null = null;
+let _dailyRateLimit: Ratelimit | null = null;
+
+function getRedis(): Redis | null {
+  const url = process.env.KV_REST_API_URL;
+  const token = process.env.KV_REST_API_TOKEN;
+
+  if (!url || !token) {
+    return null;
+  }
+
+  return new Redis({ url, token });
+}
+
+// No-op rate limiter for when Redis is not configured
+const noopRateLimiter = {
+  limit: async () => ({ success: true, limit: 0, remaining: 0, reset: 0 }),
+};
+
+const MINUTE_LIMIT = Number(process.env.RATE_LIMIT_PER_MINUTE) || 10;
+const DAILY_LIMIT = Number(process.env.RATE_LIMIT_PER_DAY) || 100;
+
+// Requests per minute (sliding window)
+export const minuteRateLimit = {
+  limit: async (identifier: string) => {
+    if (!_minuteRateLimit) {
+      const redis = getRedis();
+      if (!redis) return noopRateLimiter.limit();
+      _minuteRateLimit = new Ratelimit({
+        redis,
+        limiter: Ratelimit.slidingWindow(MINUTE_LIMIT, "1 m"),
+        prefix: "ratelimit:dashboard:minute",
+      });
+    }
+    return _minuteRateLimit.limit(identifier);
+  },
+};
+
+// Requests per day (fixed window)
+export const dailyRateLimit = {
+  limit: async (identifier: string) => {
+    if (!_dailyRateLimit) {
+      const redis = getRedis();
+      if (!redis) return noopRateLimiter.limit();
+      _dailyRateLimit = new Ratelimit({
+        redis,
+        limiter: Ratelimit.fixedWindow(DAILY_LIMIT, "1 d"),
+        prefix: "ratelimit:dashboard:daily",
+      });
+    }
+    return _dailyRateLimit.limit(identifier);
+  },
+};

examples/dashboard/next-env.d.ts

@@ -1,6 +0,0 @@
-/// <reference types="next" />
-/// <reference types="next/image-types/global" />
-import "./.next/dev/types/routes.d.ts";
-
-// NOTE: This file should not be edited
-// see https://nextjs.org/docs/app/api-reference/config/typescript for more information.

examples/dashboard/package.json

@@ -1,6 +1,6 @@
 {
   "name": "example-dashboard",
-  "version": "0.1.7",
+  "version": "0.1.11",
   "type": "module",
   "private": true,
   "scripts": {
@@ -40,6 +40,8 @@
     "sonner": "^2.0.7",
     "tailwind-merge": "^3.4.0",
     "vaul": "^1.1.2",
+    "@upstash/ratelimit": "^2.0.8",
+    "@upstash/redis": "^1.37.0",
     "zod": "^4.3.6"
   },
   "devDependencies": {

examples/game-engine/.env.example

@@ -0,0 +1,17 @@
+# Vercel AI Gateway
+# Automatically authenticated when deployed on Vercel
+# For local development, get your key from https://vercel.com/ai-gateway
+AI_GATEWAY_API_KEY=
+
+# AI Model Configuration
+# Default: anthropic/claude-sonnet-4-6
+AI_GATEWAY_MODEL=anthropic/claude-sonnet-4-6
+
+# ElevenLabs Text-to-Speech (optional, for NPC dialogue)
+ELEVENLABS_API_KEY=
+
+# Upstash Redis for rate limiting (optional, no-op if not set)
+KV_REST_API_URL=
+KV_REST_API_TOKEN=
+RATE_LIMIT_PER_MINUTE=10
+RATE_LIMIT_PER_DAY=100

examples/game-engine/CHANGELOG.md

@@ -0,0 +1,21 @@
+# example-game-engine
+
+## 0.1.2
+
+### Patch Changes
+
+- Updated dependencies [519a538]
+  - @json-render/core@0.16.0
+  - @json-render/react@0.16.0
+  - @json-render/react-three-fiber@0.16.0
+  - @json-render/yaml@0.16.0
+
+## 0.1.1
+
+### Patch Changes
+
+- Updated dependencies [bf3a7ec]
+  - @json-render/core@0.15.0
+  - @json-render/react@0.15.0
+  - @json-render/react-three-fiber@0.15.0
+  - @json-render/yaml@0.15.0

examples/game-engine/app/api/ai-game/route.ts

@@ -0,0 +1,48 @@
+import { streamText } from "ai";
+import { gateway } from "@ai-sdk/gateway";
+import { headers } from "next/headers";
+import { generateGameAIPrompt } from "@/lib/ai-game-prompt";
+import { minuteRateLimit, dailyRateLimit } from "@/lib/rate-limit";
+
+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 { prompt, objects, previousPrompts } = await req.json();
+
+  if (!prompt) {
+    return Response.json({ error: "Prompt is required" }, { status: 400 });
+  }
+
+  const sceneObjects = Array.isArray(objects) ? objects : [];
+
+  const result = streamText({
+    model: gateway(
+      process.env.AI_GATEWAY_MODEL || "anthropic/claude-sonnet-4-6",
+    ),
+    prompt: generateGameAIPrompt(prompt, sceneObjects, previousPrompts || []),
+  });
+
+  return result.toTextStreamResponse();
+}

examples/game-engine/app/api/ai/route.ts

@@ -0,0 +1,43 @@
+import { streamText } from "ai";
+import { gateway } from "@ai-sdk/gateway";
+import { headers } from "next/headers";
+import { generateSystemPrompt, generateUserPrompt } from "@/lib/ai-prompt";
+import { minuteRateLimit, dailyRateLimit } from "@/lib/rate-limit";
+
+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 { prompt, spec, previousPrompts } = await req.json();
+
+  const result = streamText({
+    model: gateway(
+      process.env.AI_GATEWAY_MODEL || "anthropic/claude-sonnet-4-6",
+    ),
+    system: generateSystemPrompt(),
+    prompt: generateUserPrompt(prompt, spec, previousPrompts),
+  });
+
+  return result.toTextStreamResponse();
+}

examples/game-engine/app/api/character-responses/route.ts

@@ -0,0 +1,125 @@
+import { streamText } from "ai";
+import { gateway } from "@ai-sdk/gateway";
+import { headers } from "next/headers";
+import speechQueue from "@/lib/speech-queue";
+import { minuteRateLimit, dailyRateLimit } from "@/lib/rate-limit";
+
+interface DialogMessage {
+  text: string;
+  audioUrl?: string;
+}
+
+const VOICE_MAP: Record<string, string> = {
+  elder: "pNInz6obpgDQGcFmaJgB",
+  old: "pNInz6obpgDQGcFmaJgB",
+  wise: "pNInz6obpgDQGcFmaJgB",
+  warrior: "AZnzlk1XvdvUeBnXmlld",
+  soldier: "AZnzlk1XvdvUeBnXmlld",
+  guard: "AZnzlk1XvdvUeBnXmlld",
+  child: "MF3mGyEYCl7XYWbV9V6O",
+  young: "MF3mGyEYCl7XYWbV9V6O",
+  merchant: "jBpfuIE2acCO8z3wKNLl",
+  trader: "jBpfuIE2acCO8z3wKNLl",
+  wizard: "IKne3meq5aSn9XLyUdCD",
+  mage: "IKne3meq5aSn9XLyUdCD",
+  magic: "IKne3meq5aSn9XLyUdCD",
+};
+
+function getVoiceIdForRole(role: string): string {
+  const lower = role.toLowerCase();
+  for (const [keyword, voiceId] of Object.entries(VOICE_MAP)) {
+    if (lower.includes(keyword)) return voiceId;
+  }
+  return "ThT5KcBeYPX3keUQqHPh";
+}
+
+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 { role } = await req.json();
+
+  const prompt = `You are a character with the following role: "${role || "villager"}".
+Generate 2-3 short messages that this character would say when interacted with.
+Keep each message under 100 characters.
+Return ONLY a JSON array of objects with a "text" field for each message.
+Example: [{"text":"Hello traveler! Welcome to our village."}, {"text":"Can I help you with something?"}]`;
+
+  try {
+    const result = await streamText({
+      model: gateway(
+        process.env.AI_GATEWAY_MODEL || "anthropic/claude-sonnet-4-6",
+      ),
+      prompt,
+    });
+
+    let text = "";
+    for await (const chunk of result.textStream) {
+      text += chunk;
+    }
+
+    let messages: DialogMessage[] = [];
+    try {
+      const jsonMatch = text.match(/\[.*\]/s);
+      const jsonString = jsonMatch ? jsonMatch[0] : "[]";
+      messages = JSON.parse(jsonString);
+    } catch {
+      messages = [
+        { text: "Hello there! How can I help you?" },
+        { text: "It's a beautiful day, isn't it?" },
+      ];
+    }
+
+    if (messages.length === 0) {
+      messages = [
+        { text: "Hello there! How can I help you?" },
+        { text: "It's a beautiful day, isn't it?" },
+      ];
+    }
+
+    const hasTTS = !!process.env.ELEVENLABS_API_KEY;
+    if (hasTTS) {
+      const voiceId = getVoiceIdForRole(role || "");
+      const withAudio: DialogMessage[] = [];
+      for (const msg of messages) {
+        try {
+          const audioUrl = await speechQueue.add(msg.text, voiceId);
+          withAudio.push({ ...msg, audioUrl });
+        } catch {
+          withAudio.push(msg);
+        }
+      }
+      return Response.json({ messages: withAudio });
+    }
+
+    return Response.json({ messages });
+  } catch {
+    return Response.json({
+      messages: [
+        { text: "Hello there! How can I help you?" },
+        { text: "It's a beautiful day, isn't it?" },
+      ],
+    });
+  }
+}

examples/game-engine/app/api/environments/route.ts

@@ -0,0 +1,21 @@
+import { NextResponse } from "next/server";
+import { list } from "@vercel/blob";
+
+export async function GET() {
+  try {
+    const { blobs } = await list({ prefix: "game-engine/environments/" });
+    const environments = blobs.map((blob) => ({
+      name: blob.pathname.split("/").pop() || "Unknown",
+      url: blob.url,
+      size: blob.size,
+      uploadedAt: blob.uploadedAt,
+    }));
+    return NextResponse.json({ environments });
+  } catch (error) {
+    console.error("Failed to list environments:", error);
+    return NextResponse.json(
+      { error: "Failed to list environments" },
+      { status: 500 },
+    );
+  }
+}

examples/game-engine/app/api/models/route.ts

@@ -0,0 +1,21 @@
+import { NextResponse } from "next/server";
+import { list } from "@vercel/blob";
+
+export async function GET() {
+  try {
+    const { blobs } = await list({ prefix: "game-engine/models/" });
+    const models = blobs.map((blob) => ({
+      name: blob.pathname.split("/").pop() || "Unknown",
+      url: blob.url,
+      size: blob.size,
+      uploadedAt: blob.uploadedAt,
+    }));
+    return NextResponse.json({ models });
+  } catch (error) {
+    console.error("Failed to list models:", error);
+    return NextResponse.json(
+      { error: "Failed to list models" },
+      { status: 500 },
+    );
+  }
+}

examples/game-engine/app/api/text-to-speech/route.ts

@@ -0,0 +1,50 @@
+export async function POST(req: Request) {
+  const { text, voiceId } = await req.json();
+
+  const apiKey = process.env.ELEVENLABS_API_KEY;
+  if (!apiKey) {
+    return new Response(
+      JSON.stringify({ error: "ELEVENLABS_API_KEY not set" }),
+      {
+        status: 500,
+        headers: { "Content-Type": "application/json" },
+      },
+    );
+  }
+
+  const voice = voiceId || "21m00Tcm4TlvDq8ikWAM";
+
+  const response = await fetch(
+    `https://api.elevenlabs.io/v1/text-to-speech/${voice}`,
+    {
+      method: "POST",
+      headers: {
+        "xi-api-key": apiKey,
+        "Content-Type": "application/json",
+      },
+      body: JSON.stringify({
+        text,
+        model_id: "eleven_monolingual_v1",
+        voice_settings: {
+          stability: 0.5,
+          similarity_boost: 0.75,
+        },
+      }),
+    },
+  );
+
+  if (!response.ok) {
+    return new Response(JSON.stringify({ error: "TTS generation failed" }), {
+      status: 500,
+      headers: { "Content-Type": "application/json" },
+    });
+  }
+
+  const audioBuffer = await response.arrayBuffer();
+  return new Response(audioBuffer, {
+    headers: {
+      "Content-Type": "audio/mpeg",
+      "Cache-Control": "public, max-age=3600",
+    },
+  });
+}

examples/game-engine/app/api/upload-environment/route.ts

@@ -0,0 +1,29 @@
+import { NextResponse } from "next/server";
+import { put } from "@vercel/blob";
+
+export async function POST(request: Request) {
+  try {
+    const formData = await request.formData();
+    const file = formData.get("file") as File;
+
+    if (!file) {
+      return NextResponse.json({ error: "No file provided" }, { status: 400 });
+    }
+
+    const filenameFromForm = formData.get("filename");
+    const filename = filenameFromForm ? String(filenameFromForm) : file.name;
+    const cleanFilename = filename.toLowerCase().replace(/[^a-z0-9.]/g, "-");
+
+    const blob = await put(`game-engine/environments/${cleanFilename}`, file, {
+      access: "public",
+    });
+
+    return NextResponse.json({ url: blob.url, name: cleanFilename });
+  } catch (error) {
+    console.error("Failed to upload environment:", error);
+    return NextResponse.json(
+      { error: "Failed to upload file" },
+      { status: 500 },
+    );
+  }
+}

examples/game-engine/app/api/upload-model/route.ts

@@ -0,0 +1,29 @@
+import { NextResponse } from "next/server";
+import { put } from "@vercel/blob";
+
+export async function POST(request: Request) {
+  try {
+    const formData = await request.formData();
+    const file = formData.get("file") as File;
+
+    if (!file) {
+      return NextResponse.json({ error: "No file provided" }, { status: 400 });
+    }
+
+    const filenameFromForm = formData.get("filename");
+    const filename = filenameFromForm ? String(filenameFromForm) : file.name;
+    const cleanFilename = filename.toLowerCase().replace(/[^a-z0-9.]/g, "-");
+
+    const blob = await put(`game-engine/models/${cleanFilename}`, file, {
+      access: "public",
+    });
+
+    return NextResponse.json({ url: blob.url, name: cleanFilename });
+  } catch (error) {
+    console.error("Failed to upload model:", error);
+    return NextResponse.json(
+      { error: "Failed to upload file" },
+      { status: 500 },
+    );
+  }
+}

examples/game-engine/app/globals.css

@@ -0,0 +1,96 @@
+@import "tailwindcss";
+
+@theme inline {
+  --color-background: #0a0a0a;
+  --color-foreground: #ededed;
+  --color-muted: #1e1e1e;
+  --color-muted-foreground: #888;
+  --color-border: #2a2a2a;
+  --color-input: #1a1a1a;
+  --color-primary: #fff;
+  --color-primary-foreground: #0a0a0a;
+  --color-accent: #333;
+  --color-accent-foreground: #ededed;
+  --color-destructive: #e53935;
+}
+
+html, body {
+  margin: 0;
+  background: var(--color-background);
+  color: var(--color-foreground);
+  font-family: system-ui, -apple-system, sans-serif;
+  overflow: hidden;
+  overscroll-behavior: none;
+  touch-action: none;
+  position: fixed;
+  width: 100%;
+  height: 100dvh;
+  -webkit-user-select: none;
+  user-select: none;
+  -webkit-touch-callout: none;
+  -webkit-tap-highlight-color: transparent;
+}
+
+input, textarea, [contenteditable] {
+  -webkit-user-select: text;
+  user-select: text;
+  -webkit-touch-callout: default;
+  font-size: 16px;
+}
+
+* {
+  box-sizing: border-box;
+  -webkit-tap-highlight-color: transparent;
+}
+
+@media (hover: none) {
+  button, a, [role="button"] {
+    -webkit-tap-highlight-color: transparent;
+  }
+  .hover\:bg-white\/5:hover { background-color: transparent !important; }
+  .hover\:bg-white\/10:hover { background-color: transparent !important; }
+  .hover\:bg-white\/20:hover { background-color: transparent !important; }
+}
+
+canvas {
+  -webkit-user-select: none;
+  user-select: none;
+  -webkit-touch-callout: none;
+  touch-action: none;
+}
+
+:root {
+  --sai-bottom: env(safe-area-inset-bottom, 0px);
+  --sai-top: env(safe-area-inset-top, 0px);
+}
+
+.safe-bottom {
+  padding-bottom: env(safe-area-inset-bottom, 0px);
+}
+
+@keyframes pulse-low {
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.6; }
+}
+
+.animate-pulse-low {
+  animation: pulse-low 1s ease-in-out infinite;
+}
+
+@keyframes fade-in {
+  from { opacity: 0; }
+  to { opacity: 1; }
+}
+
+.animate-fade-in {
+  animation: fade-in 0.5s ease-out forwards;
+}
+
+@keyframes screen-flash {
+  0% { opacity: 0.7; }
+  100% { opacity: 0; }
+}
+
+.animate-screen-flash {
+  animation: screen-flash 0.4s ease-out forwards;
+}

examples/game-engine/app/layout.tsx

@@ -0,0 +1,27 @@
+import type { Metadata } from "next";
+import "./globals.css";
+
+export const metadata: Metadata = {
+  title: "Game Engine | json-render",
+  description:
+    "Build 3D worlds with AI. A scene editor and game runtime powered by json-render specs and React Three Fiber.",
+  icons: { icon: "/icon.svg" },
+};
+
+export default function RootLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  return (
+    <html lang="en">
+      <head>
+        <meta
+          name="viewport"
+          content="width=device-width, initial-scale=1, viewport-fit=cover"
+        />
+      </head>
+      <body>{children}</body>
+    </html>
+  );
+}

examples/game-engine/app/page.tsx

@@ -0,0 +1,7 @@
+"use client";
+
+import { GameEngine } from "@/components/game-engine";
+
+export default function Page() {
+  return <GameEngine />;
+}

examples/game-engine/components/editor/add-object-button.tsx

@@ -0,0 +1,150 @@
+"use client";
+
+import { useState, useRef, useEffect } from "react";
+import {
+  Plus,
+  Box,
+  Circle,
+  Cylinder,
+  Triangle,
+  Sun,
+  User,
+  Volume2,
+  Image,
+  Video,
+  Package,
+  Users,
+  Hexagon,
+  Spline,
+  Pentagon,
+  Shapes,
+} from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+import type { ObjectType } from "@/lib/types";
+
+const sections = [
+  {
+    label: "Basic Shapes",
+    items: [
+      { type: "box" as ObjectType, label: "Box", icon: Box },
+      { type: "sphere" as ObjectType, label: "Sphere", icon: Circle },
+      { type: "cylinder" as ObjectType, label: "Cylinder", icon: Cylinder },
+      { type: "cone" as ObjectType, label: "Cone", icon: Triangle },
+      { type: "torus" as ObjectType, label: "Torus", icon: Circle },
+      { type: "plane" as ObjectType, label: "Plane", icon: Box },
+    ],
+  },
+  {
+    label: "Advanced Shapes",
+    items: [
+      { type: "capsule" as ObjectType, label: "Capsule", icon: Cylinder },
+      {
+        type: "tetrahedron" as ObjectType,
+        label: "Tetrahedron",
+        icon: Triangle,
+      },
+      { type: "octahedron" as ObjectType, label: "Octahedron", icon: Circle },
+      {
+        type: "dodecahedron" as ObjectType,
+        label: "Dodecahedron",
+        icon: Circle,
+      },
+      { type: "icosahedron" as ObjectType, label: "Icosahedron", icon: Circle },
+      { type: "knot" as ObjectType, label: "Knot", icon: Circle },
+    ],
+  },
+  {
+    label: "Custom Geometry",
+    items: [
+      { type: "extrude" as ObjectType, label: "Extrude", icon: Hexagon },
+      { type: "tube" as ObjectType, label: "Tube", icon: Spline },
+      { type: "shape" as ObjectType, label: "Shape", icon: Pentagon },
+      { type: "mesh" as ObjectType, label: "Mesh", icon: Shapes },
+    ],
+  },
+  {
+    label: "Environment",
+    items: [
+      { type: "light" as ObjectType, label: "Light", icon: Sun },
+      { type: "sound" as ObjectType, label: "Sound", icon: Volume2 },
+    ],
+  },
+  {
+    label: "Media",
+    items: [
+      { type: "image" as ObjectType, label: "Image", icon: Image },
+      { type: "video" as ObjectType, label: "Video", icon: Video },
+    ],
+  },
+  {
+    label: "Entities",
+    items: [
+      { type: "player" as ObjectType, label: "Player", icon: User },
+      { type: "character" as ObjectType, label: "Character", icon: Users },
+      { type: "model" as ObjectType, label: "Model", icon: Package },
+    ],
+  },
+];
+
+export function AddObjectButton() {
+  const [open, setOpen] = useState(false);
+  const addObject = useEditorStore((s) => s.addObject);
+  const popoverRef = useRef<HTMLDivElement>(null);
+  const isMobile = useIsMobile();
+
+  useEffect(() => {
+    if (!open) return;
+    const handleClickOutside = (e: PointerEvent) => {
+      if (
+        popoverRef.current &&
+        !popoverRef.current.contains(e.target as Node)
+      ) {
+        setOpen(false);
+      }
+    };
+    document.addEventListener("pointerdown", handleClickOutside);
+    return () =>
+      document.removeEventListener("pointerdown", handleClickOutside);
+  }, [open]);
+
+  return (
+    <div className="absolute bottom-4 left-4 z-10" ref={popoverRef}>
+      {open && (
+        <div
+          className={`absolute bottom-14 left-0 ${isMobile ? "w-64" : "w-56"} bg-[#141414] border border-[#2a2a2a] rounded-lg shadow-xl overflow-hidden`}
+        >
+          <div className="max-h-80 overflow-y-auto py-1">
+            {sections.map((section) => (
+              <div key={section.label}>
+                <div className="px-3 py-1.5 text-[9px] font-semibold text-[#555] uppercase tracking-wider">
+                  {section.label}
+                </div>
+                {section.items.map((item) => (
+                  <button
+                    key={item.type}
+                    onClick={() => {
+                      addObject(item.type);
+                      setOpen(false);
+                    }}
+                    className={`w-full flex items-center gap-2.5 px-3 ${isMobile ? "py-2.5" : "py-1.5"} text-xs text-[#aaa] hover:text-white active:text-white hover:bg-white/5 active:bg-white/10 transition-colors`}
+                  >
+                    <item.icon size={isMobile ? 16 : 12} />
+                    {item.label}
+                  </button>
+                ))}
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+      <button
+        onClick={() => setOpen(!open)}
+        className={`${isMobile ? "w-11 h-11" : "w-9 h-9"} flex items-center justify-center rounded-full bg-white/10 hover:bg-white/20 active:bg-white/30 text-white transition-colors backdrop-blur-sm`}
+        title="Add object"
+      >
+        <Plus size={isMobile ? 20 : 18} />
+      </button>
+    </div>
+  );
+}

examples/game-engine/components/editor/ai-prompt.tsx

@@ -0,0 +1,213 @@
+"use client";
+
+import { useState, useRef, useMemo } from "react";
+import { MessageSquare, X, ArrowUp, Loader2 } from "lucide-react";
+import { deepMergeSpec } from "@json-render/core";
+import type { Spec } from "@json-render/core";
+import { parse } from "yaml";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+import { sceneToSpec } from "@/lib/scene-to-spec";
+import { specToSceneObjects } from "@/lib/spec-to-scene";
+
+function stripFences(text: string): string {
+  return text
+    .replace(/```yaml-edit\s*\n?/g, "")
+    .replace(/```yaml-spec\s*\n?/g, "")
+    .replace(/```\s*$/gm, "")
+    .trim();
+}
+
+export function AIPrompt() {
+  const [open, setOpen] = useState(false);
+  const [prompt, setPrompt] = useState("");
+  const [isProcessing, setIsProcessing] = useState(false);
+  const [message, setMessage] = useState("");
+  const [previousPrompts, setPreviousPrompts] = useState<string[]>([]);
+  const inputRef = useRef<HTMLInputElement>(null);
+  const isMobile = useIsMobile();
+
+  const scenes = useEditorStore((s) => s.scenes);
+  const activeSceneId = useEditorStore((s) => s.activeSceneId);
+  const replaceSceneObjects = useEditorStore((s) => s.replaceSceneObjects);
+  const setIsPromptOpen = useEditorStore((s) => s.setIsPromptOpen);
+
+  const activeScene = useMemo(
+    () => scenes.find((s) => s.id === activeSceneId),
+    [scenes, activeSceneId],
+  );
+
+  const handleSubmit = async () => {
+    if (!prompt.trim() || isProcessing || !activeScene) return;
+
+    setIsProcessing(true);
+    setMessage("Thinking...");
+    setIsPromptOpen(true);
+
+    try {
+      const currentSpec = sceneToSpec(activeScene);
+
+      const res = await fetch("/api/ai", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({
+          prompt,
+          spec: currentSpec,
+          previousPrompts,
+        }),
+      });
+
+      if (!res.ok) {
+        setMessage("Error: " + res.statusText);
+        return;
+      }
+
+      const reader = res.body?.getReader();
+      if (!reader) return;
+
+      const decoder = new TextDecoder();
+      let accumulated = "";
+      let lastAppliedJson = "";
+      const baseSpec = JSON.parse(JSON.stringify(currentSpec));
+
+      while (true) {
+        const { done, value } = await reader.read();
+        if (done) break;
+
+        const chunk = decoder.decode(value, { stream: true });
+        accumulated += chunk;
+
+        if (!chunk.includes("\n")) continue;
+
+        const stripped = stripFences(accumulated);
+        if (!stripped) continue;
+
+        try {
+          const editObj = parse(stripped);
+          if (
+            editObj &&
+            typeof editObj === "object" &&
+            !Array.isArray(editObj)
+          ) {
+            const editJson = JSON.stringify(editObj);
+            if (editJson === lastAppliedJson) continue;
+            lastAppliedJson = editJson;
+
+            const merged = deepMergeSpec(
+              JSON.parse(JSON.stringify(baseSpec)),
+              editObj as Record<string, unknown>,
+            );
+            const patchedSpec = merged as unknown as Spec;
+            const newObjects = specToSceneObjects(patchedSpec);
+            if (newObjects.length > 0) {
+              replaceSceneObjects(newObjects);
+            }
+          }
+        } catch {
+          // Incomplete YAML — wait for more data
+        }
+      }
+
+      // Final parse to catch any remaining content
+      const stripped = stripFences(accumulated);
+      if (stripped) {
+        try {
+          const editObj = parse(stripped);
+          if (
+            editObj &&
+            typeof editObj === "object" &&
+            !Array.isArray(editObj)
+          ) {
+            const merged = deepMergeSpec(
+              JSON.parse(JSON.stringify(baseSpec)),
+              editObj as Record<string, unknown>,
+            );
+            const patchedSpec = merged as unknown as Spec;
+            const newObjects = specToSceneObjects(patchedSpec);
+            if (newObjects.length > 0) {
+              replaceSceneObjects(newObjects);
+            }
+          }
+        } catch {
+          // Parse failed
+        }
+      }
+
+      setPreviousPrompts((prev) => [...prev, prompt]);
+      setMessage("Done");
+      setPrompt("");
+    } catch {
+      setMessage("Error occurred");
+    } finally {
+      setIsProcessing(false);
+      setIsPromptOpen(false);
+      setTimeout(() => setMessage(""), 3000);
+    }
+  };
+
+  if (!open) {
+    return (
+      <button
+        onClick={() => {
+          setOpen(true);
+          setTimeout(() => inputRef.current?.focus(), 100);
+        }}
+        className={`absolute bottom-4 right-4 z-10 ${isMobile ? "w-11 h-11" : "w-9 h-9"} flex items-center justify-center rounded-full bg-white/10 hover:bg-white/20 active:bg-white/30 text-white transition-colors backdrop-blur-sm`}
+        title="AI Scene Editor"
+      >
+        <MessageSquare size={isMobile ? 18 : 16} />
+      </button>
+    );
+  }
+
+  return (
+    <div
+      className={`absolute bottom-4 right-4 z-10 ${isMobile ? "left-4 right-4 w-auto" : "w-80"}`}
+    >
+      <div className="bg-[#141414] border border-[#2a2a2a] rounded-lg shadow-xl overflow-hidden">
+        <div className="flex items-center justify-between px-3 py-2 border-b border-[#1e1e1e]">
+          <span className="text-[10px] font-semibold text-[#666] uppercase tracking-wider">
+            AI Scene Editor
+          </span>
+          <button
+            onClick={() => setOpen(false)}
+            className="p-1.5 text-[#666] hover:text-white active:text-white"
+          >
+            <X size={14} />
+          </button>
+        </div>
+        <div className="p-3">
+          <div className="flex gap-2">
+            <input
+              ref={inputRef}
+              type="text"
+              value={prompt}
+              onChange={(e) => setPrompt(e.target.value)}
+              onKeyDown={(e) => e.key === "Enter" && handleSubmit()}
+              placeholder="Describe scene changes..."
+              disabled={isProcessing}
+              className={`flex-1 bg-[#1a1a1a] border border-[#2a2a2a] rounded px-2.5 ${isMobile ? "py-2.5 text-base" : "py-1.5 text-xs"} text-[#ccc] outline-none focus:border-[#555] placeholder:text-[#444] disabled:opacity-50`}
+            />
+            <button
+              onClick={handleSubmit}
+              disabled={isProcessing || !prompt.trim()}
+              className={`${isMobile ? "p-2.5" : "p-1.5"} rounded bg-white/10 hover:bg-white/20 active:bg-white/30 text-white disabled:opacity-30 disabled:cursor-not-allowed transition-colors`}
+            >
+              {isProcessing ? (
+                <Loader2 size={14} className="animate-spin" />
+              ) : (
+                <ArrowUp size={14} />
+              )}
+            </button>
+          </div>
+          {message && (
+            <div className="mt-2 text-[10px] text-[#666] flex items-center gap-1.5">
+              {isProcessing && <Loader2 size={10} className="animate-spin" />}
+              {message}
+            </div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}

examples/game-engine/components/editor/drop-zone.tsx

@@ -0,0 +1,183 @@
+"use client";
+
+import { useState, useCallback, useEffect, useRef } from "react";
+import { Upload } from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+
+export function DropZone() {
+  const [isDragging, setIsDragging] = useState(false);
+  const [isUploading, setIsUploading] = useState(false);
+  const dragCounter = useRef(0);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  const createCustomObject = useEditorStore((s) => s.createCustomObject);
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const isMobile = useIsMobile();
+
+  const hasGlbFiles = useCallback((e: DragEvent) => {
+    if (e.dataTransfer?.types.includes("Files")) return true;
+    return false;
+  }, []);
+
+  const processFiles = useCallback(
+    async (files: File[]) => {
+      const glbFiles = files.filter(
+        (f) =>
+          f.name.endsWith(".glb") ||
+          f.name.endsWith(".gltf") ||
+          f.type === "model/gltf-binary" ||
+          f.type === "model/gltf+json",
+      );
+
+      if (glbFiles.length === 0) return;
+
+      setIsUploading(true);
+
+      for (const file of glbFiles) {
+        try {
+          let modelUrl: string;
+
+          try {
+            const formData = new FormData();
+            formData.append("file", file);
+            formData.append("filename", file.name);
+
+            const res = await fetch("/api/upload-model", {
+              method: "POST",
+              body: formData,
+            });
+
+            if (res.ok) {
+              const data = await res.json();
+              modelUrl = data.url;
+            } else {
+              modelUrl = URL.createObjectURL(file);
+            }
+          } catch {
+            modelUrl = URL.createObjectURL(file);
+          }
+
+          const name = file.name.replace(/\.(glb|gltf)$/i, "");
+          createCustomObject("model", {
+            name: name.charAt(0).toUpperCase() + name.slice(1),
+            modelUrl,
+            position: [0, 0, 0],
+            scale: [1, 1, 1],
+          });
+        } catch (err) {
+          console.error("Failed to add model:", err);
+        }
+      }
+
+      setIsUploading(false);
+    },
+    [createCustomObject],
+  );
+
+  useEffect(() => {
+    if (isPlaying) return;
+
+    const handleDragEnter = (e: DragEvent) => {
+      e.preventDefault();
+      e.stopPropagation();
+      dragCounter.current++;
+      if (hasGlbFiles(e)) {
+        setIsDragging(true);
+      }
+    };
+
+    const handleDragOver = (e: DragEvent) => {
+      e.preventDefault();
+      e.stopPropagation();
+      if (e.dataTransfer) {
+        e.dataTransfer.dropEffect = "copy";
+      }
+    };
+
+    const handleDragLeave = (e: DragEvent) => {
+      e.preventDefault();
+      e.stopPropagation();
+      dragCounter.current--;
+      if (dragCounter.current <= 0) {
+        dragCounter.current = 0;
+        setIsDragging(false);
+      }
+    };
+
+    const handleDrop = async (e: DragEvent) => {
+      e.preventDefault();
+      e.stopPropagation();
+      dragCounter.current = 0;
+      setIsDragging(false);
+
+      if (!e.dataTransfer) return;
+      await processFiles(Array.from(e.dataTransfer.files));
+    };
+
+    window.addEventListener("dragenter", handleDragEnter);
+    window.addEventListener("dragover", handleDragOver);
+    window.addEventListener("dragleave", handleDragLeave);
+    window.addEventListener("drop", handleDrop);
+
+    return () => {
+      window.removeEventListener("dragenter", handleDragEnter);
+      window.removeEventListener("dragover", handleDragOver);
+      window.removeEventListener("dragleave", handleDragLeave);
+      window.removeEventListener("drop", handleDrop);
+    };
+  }, [isPlaying, hasGlbFiles, processFiles]);
+
+  const handleFileInputChange = async (
+    e: React.ChangeEvent<HTMLInputElement>,
+  ) => {
+    if (e.target.files) {
+      await processFiles(Array.from(e.target.files));
+    }
+    if (fileInputRef.current) {
+      fileInputRef.current.value = "";
+    }
+  };
+
+  if (isPlaying) return null;
+
+  return (
+    <>
+      {isDragging && (
+        <div className="absolute inset-0 bg-blue-500/10 border-2 border-dashed border-blue-500/50 rounded-lg flex items-center justify-center z-[6] pointer-events-none">
+          <div className="bg-black/70 backdrop-blur-sm rounded-lg px-6 py-4 flex flex-col items-center gap-2">
+            <Upload className="w-8 h-8 text-blue-400" />
+            <span className="text-sm text-blue-300 font-medium">
+              Drop .glb file to add model
+            </span>
+          </div>
+        </div>
+      )}
+      {isUploading && (
+        <div className="absolute inset-0 flex items-center justify-center pointer-events-none z-[6]">
+          <div className="bg-black/70 backdrop-blur-sm rounded-lg px-6 py-4">
+            <span className="text-sm text-white">Adding model...</span>
+          </div>
+        </div>
+      )}
+      {isMobile && (
+        <>
+          <input
+            ref={fileInputRef}
+            type="file"
+            accept=".glb,.gltf"
+            multiple
+            onChange={handleFileInputChange}
+            className="hidden"
+          />
+          <button
+            onClick={() => fileInputRef.current?.click()}
+            className="absolute bottom-4 left-[4.5rem] z-10 w-11 h-11 flex items-center justify-center rounded-full bg-white/10 active:bg-white/30 text-white transition-colors backdrop-blur-sm"
+            title="Import .glb model"
+          >
+            <Upload size={18} />
+          </button>
+        </>
+      )}
+    </>
+  );
+}

examples/game-engine/components/editor/json-pane.tsx

@@ -0,0 +1,86 @@
+"use client";
+
+import { useMemo, useState, useEffect, type ReactNode } from "react";
+import { stringify } from "yaml";
+import { useEditorStore } from "@/lib/store";
+import { sceneToSpec } from "@/lib/scene-to-spec";
+
+const YAML_TOKEN_RE =
+  /(^[ \t]*[\w][\w.-]*:(?=\s|$))|("(?:\\.|[^"\\])*"|'(?:\\'|[^'\\])*')|(true|false)|(null|~)|(-?\d+(?:\.\d+)?(?:[eE][+-]?\d+)?(?=\s|$))/gm;
+
+function highlightYaml(yaml: string): ReactNode[] {
+  const parts: ReactNode[] = [];
+  let lastIndex = 0;
+  let match: RegExpExecArray | null;
+
+  while ((match = YAML_TOKEN_RE.exec(yaml)) !== null) {
+    if (match.index > lastIndex) {
+      parts.push(yaml.slice(lastIndex, match.index));
+    }
+
+    const [full, key, str, bool, nil, num] = match;
+    let color: string;
+    if (key) color = "#c4a7e7";
+    else if (str) color = "#a8d4a2";
+    else if (bool) color = "#f6c177";
+    else if (nil) color = "#6e6a86";
+    else if (num) color = "#ebbcba";
+    else color = "#8a8a8a";
+
+    parts.push(
+      <span key={match.index} style={{ color }}>
+        {full}
+      </span>,
+    );
+    lastIndex = match.index + full.length;
+  }
+
+  if (lastIndex < yaml.length) {
+    parts.push(yaml.slice(lastIndex));
+  }
+
+  return parts;
+}
+
+export function JsonPane() {
+  const [mounted, setMounted] = useState(false);
+  const scenes = useEditorStore((s) => s.scenes);
+  const activeSceneId = useEditorStore((s) => s.activeSceneId);
+
+  useEffect(() => setMounted(true), []);
+
+  const activeScene = useMemo(
+    () => scenes.find((s) => s.id === activeSceneId) || scenes[0],
+    [scenes, activeSceneId],
+  );
+
+  const spec = useMemo(() => {
+    if (!activeScene) return null;
+    return sceneToSpec(activeScene);
+  }, [activeScene]);
+
+  const yaml = useMemo(() => {
+    if (!spec) return "";
+    return stringify(spec, { indent: 2, lineWidth: 0 });
+  }, [spec]);
+
+  const highlighted = useMemo(() => {
+    if (!yaml) return null;
+    return highlightYaml(yaml);
+  }, [yaml]);
+
+  return (
+    <div className="flex flex-col h-full">
+      <div className="h-9 flex items-center px-3 border-b border-[#1e1e1e] flex-shrink-0">
+        <span className="text-[10px] font-semibold text-[#555] uppercase tracking-wider font-mono">
+          Spec
+        </span>
+      </div>
+      <div className="flex-1 overflow-auto">
+        <pre className="p-3 text-[11px] leading-[1.5] text-[#555] font-mono whitespace-pre select-all">
+          {mounted ? highlighted : ""}
+        </pre>
+      </div>
+    </div>
+  );
+}

examples/game-engine/components/editor/scene-dropdown.tsx

@@ -0,0 +1,111 @@
+"use client";
+
+import { useState, useRef, useEffect } from "react";
+import { ChevronDown, Plus, Copy, Trash2 } from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+
+export function SceneDropdown() {
+  const [open, setOpen] = useState(false);
+  const ref = useRef<HTMLDivElement>(null);
+
+  const {
+    scenes,
+    activeSceneId,
+    setActiveScene,
+    createScene,
+    duplicateScene,
+    deleteScene,
+  } = useEditorStore();
+
+  const activeScene = scenes.find((s) => s.id === activeSceneId) || scenes[0];
+  const isMobile = useIsMobile();
+
+  useEffect(() => {
+    function handleClickOutside(e: PointerEvent) {
+      if (ref.current && !ref.current.contains(e.target as Node)) {
+        setOpen(false);
+      }
+    }
+    document.addEventListener("pointerdown", handleClickOutside);
+    return () =>
+      document.removeEventListener("pointerdown", handleClickOutside);
+  }, []);
+
+  return (
+    <div ref={ref} className="relative">
+      <button
+        onClick={() => setOpen(!open)}
+        className="flex items-center gap-1.5 px-2 py-1 rounded text-xs text-[#ccc] hover:text-white hover:bg-white/5 transition-colors"
+      >
+        <span className="truncate max-w-[120px]">{activeScene?.name}</span>
+        <ChevronDown
+          size={12}
+          className={`transition-transform ${open ? "rotate-180" : ""}`}
+        />
+      </button>
+
+      {open && (
+        <div className="absolute top-full left-0 mt-1 w-56 bg-[#1a1a1a] border border-[#2a2a2a] rounded-md shadow-xl z-50 overflow-hidden">
+          <button
+            onClick={() => {
+              createScene(`Scene ${scenes.length + 1}`);
+              setOpen(false);
+            }}
+            className={`w-full flex items-center gap-2 px-3 ${isMobile ? "py-2.5" : "py-2"} text-xs text-[#ccc] hover:bg-white/5 hover:text-white active:bg-white/10 transition-colors`}
+          >
+            <Plus size={12} />
+            New Scene
+          </button>
+
+          <div className="h-px bg-[#2a2a2a]" />
+
+          <div className="max-h-60 overflow-y-auto py-1">
+            {scenes.map((scene) => (
+              <div
+                key={scene.id}
+                className={`group flex items-center justify-between px-3 ${isMobile ? "py-2.5" : "py-1.5"} cursor-pointer text-xs transition-colors ${
+                  scene.id === activeSceneId
+                    ? "bg-white/8 text-white"
+                    : "text-[#888] hover:text-[#ccc] hover:bg-white/3"
+                }`}
+                onClick={() => {
+                  setActiveScene(scene.id);
+                  setOpen(false);
+                }}
+              >
+                <span className="truncate">{scene.name}</span>
+                <div
+                  className={`${isMobile ? "flex" : "hidden group-hover:flex"} items-center gap-0.5`}
+                >
+                  <button
+                    onClick={(e) => {
+                      e.stopPropagation();
+                      duplicateScene(scene.id);
+                    }}
+                    className={`${isMobile ? "p-1.5" : "p-0.5"} text-[#666] hover:text-white active:text-white`}
+                    title="Duplicate"
+                  >
+                    <Copy size={isMobile ? 14 : 10} />
+                  </button>
+                  {scenes.length > 1 && (
+                    <button
+                      onClick={(e) => {
+                        e.stopPropagation();
+                        deleteScene(scene.id);
+                      }}
+                      className={`${isMobile ? "p-1.5" : "p-0.5"} text-[#666] hover:text-red-400 active:text-red-400`}
+                      title="Delete"
+                    >
+                      <Trash2 size={isMobile ? 14 : 10} />
+                    </button>
+                  )}
+                </div>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}

examples/game-engine/components/editor/scene-inspector.tsx

@@ -0,0 +1,706 @@
+"use client";
+
+import { useState } from "react";
+import { ChevronDown, ChevronRight, Eye, EyeOff, Trash2 } from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+import type { SceneObject, Physics, LightType } from "@/lib/types";
+
+function Section({
+  label,
+  defaultOpen = true,
+  children,
+}: {
+  label: string;
+  defaultOpen?: boolean;
+  children: React.ReactNode;
+}) {
+  const [open, setOpen] = useState(defaultOpen);
+  return (
+    <div className="border-b border-[#1e1e1e]">
+      <button
+        onClick={() => setOpen(!open)}
+        className="w-full flex items-center gap-1.5 px-3 py-2.5 sm:py-2 text-[10px] font-semibold text-[#666] uppercase tracking-wider hover:text-[#999] active:text-[#999] min-h-[44px] sm:min-h-0"
+      >
+        {open ? <ChevronDown size={10} /> : <ChevronRight size={10} />}
+        {label}
+      </button>
+      {open && (
+        <div className="px-3 pb-3 space-y-2.5 sm:space-y-2">{children}</div>
+      )}
+    </div>
+  );
+}
+
+function Field({
+  label,
+  children,
+}: {
+  label: string;
+  children: React.ReactNode;
+}) {
+  return (
+    <div className="flex items-center gap-2">
+      <label className="text-[10px] text-[#666] w-16 flex-shrink-0">
+        {label}
+      </label>
+      <div className="flex-1">{children}</div>
+    </div>
+  );
+}
+
+function NumberInput({
+  value,
+  onChange,
+  step = 0.1,
+}: {
+  value: number;
+  onChange: (v: number) => void;
+  step?: number;
+}) {
+  return (
+    <input
+      type="number"
+      value={value != null ? Number(value.toFixed(3)) : 0}
+      onChange={(e) => onChange(parseFloat(e.target.value) || 0)}
+      step={step}
+      className="w-full bg-[#1a1a1a] border border-[#2a2a2a] rounded px-1.5 py-1 sm:py-0.5 text-xs sm:text-[11px] text-[#ccc] outline-none focus:border-[#555]"
+    />
+  );
+}
+
+function Vec3Input({
+  value,
+  onChange,
+  labels = ["X", "Y", "Z"],
+}: {
+  value: [number, number, number];
+  onChange: (v: [number, number, number]) => void;
+  labels?: [string, string, string];
+}) {
+  return (
+    <div className="flex gap-1">
+      {[0, 1, 2].map((i) => (
+        <div key={i} className="flex-1">
+          <div className="text-[8px] text-[#555] mb-0.5">{labels[i]}</div>
+          <NumberInput
+            value={value[i] ?? 0}
+            onChange={(v) => {
+              const next = [...value] as [number, number, number];
+              next[i] = v;
+              onChange(next);
+            }}
+          />
+        </div>
+      ))}
+    </div>
+  );
+}
+
+function ColorInput({
+  value,
+  onChange,
+}: {
+  value: string;
+  onChange: (v: string) => void;
+}) {
+  return (
+    <div className="flex items-center gap-1.5">
+      <input
+        type="color"
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+        className="w-8 h-8 sm:w-6 sm:h-6 rounded border border-[#2a2a2a] cursor-pointer bg-transparent"
+      />
+      <input
+        type="text"
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+        className="flex-1 bg-[#1a1a1a] border border-[#2a2a2a] rounded px-1.5 py-1 sm:py-0.5 text-xs sm:text-[11px] text-[#ccc] outline-none focus:border-[#555]"
+      />
+    </div>
+  );
+}
+
+function SelectInput({
+  value,
+  onChange,
+  options,
+}: {
+  value: string;
+  onChange: (v: string) => void;
+  options: { value: string; label: string }[];
+}) {
+  return (
+    <select
+      value={value}
+      onChange={(e) => onChange(e.target.value)}
+      className="w-full bg-[#1a1a1a] border border-[#2a2a2a] rounded px-1.5 py-1 sm:py-0.5 text-xs sm:text-[11px] text-[#ccc] outline-none focus:border-[#555]"
+    >
+      {options.map((opt) => (
+        <option key={opt.value} value={opt.value}>
+          {opt.label}
+        </option>
+      ))}
+    </select>
+  );
+}
+
+function CheckboxInput({
+  value,
+  onChange,
+  label,
+}: {
+  value: boolean;
+  onChange: (v: boolean) => void;
+  label: string;
+}) {
+  return (
+    <label className="flex items-center gap-2 text-xs sm:text-[11px] text-[#ccc] cursor-pointer py-0.5">
+      <input
+        type="checkbox"
+        checked={value}
+        onChange={(e) => onChange(e.target.checked)}
+        className="rounded border-[#2a2a2a] w-4 h-4 sm:w-3.5 sm:h-3.5"
+      />
+      {label}
+    </label>
+  );
+}
+
+function ObjectListItem({ obj }: { obj: SceneObject }) {
+  const {
+    selectedObjectId,
+    selectObject,
+    removeObject,
+    toggleObjectVisibility,
+  } = useEditorStore();
+  const isSelected = selectedObjectId === obj.id;
+  const isMobile = useIsMobile();
+
+  return (
+    <div
+      className={`group flex items-center justify-between px-2 ${isMobile ? "py-2" : "py-1"} rounded cursor-pointer text-[11px] ${
+        isSelected
+          ? "bg-white/10 text-white"
+          : "text-[#888] hover:text-[#ccc] hover:bg-white/5"
+      }`}
+      onClick={() => selectObject(obj.id)}
+    >
+      <span className="truncate">{obj.name}</span>
+      <div
+        className={`${isMobile || isSelected ? "flex" : "hidden group-hover:flex"} items-center gap-1`}
+      >
+        <button
+          onClick={(e) => {
+            e.stopPropagation();
+            toggleObjectVisibility(obj.id);
+          }}
+          className={`${isMobile ? "p-1.5" : "p-0.5"} text-[#666] hover:text-white active:text-white`}
+        >
+          {obj.visible ? (
+            <Eye size={isMobile ? 14 : 10} />
+          ) : (
+            <EyeOff size={isMobile ? 14 : 10} />
+          )}
+        </button>
+        <button
+          onClick={(e) => {
+            e.stopPropagation();
+            removeObject(obj.id);
+          }}
+          className={`${isMobile ? "p-1.5" : "p-0.5"} text-[#666] hover:text-red-400 active:text-red-400`}
+        >
+          <Trash2 size={isMobile ? 14 : 10} />
+        </button>
+      </div>
+    </div>
+  );
+}
+
+function TransformEditor({ obj }: { obj: SceneObject }) {
+  const updateObjectTransform = useEditorStore((s) => s.updateObjectTransform);
+  const saveToHistory = useEditorStore((s) => s.saveToHistory);
+
+  return (
+    <Section label="Transform">
+      <Field label="Position">
+        <Vec3Input
+          value={obj.position}
+          onChange={(v) => {
+            updateObjectTransform(obj.id, { position: v });
+            saveToHistory();
+          }}
+        />
+      </Field>
+      <Field label="Rotation">
+        <Vec3Input
+          value={obj.rotation}
+          onChange={(v) => {
+            updateObjectTransform(obj.id, { rotation: v });
+            saveToHistory();
+          }}
+        />
+      </Field>
+      <Field label="Scale">
+        <Vec3Input
+          value={obj.scale}
+          onChange={(v) => {
+            updateObjectTransform(obj.id, { scale: v });
+            saveToHistory();
+          }}
+        />
+      </Field>
+    </Section>
+  );
+}
+
+function MaterialEditor({ obj }: { obj: SceneObject }) {
+  const updateObjectMaterial = useEditorStore((s) => s.updateObjectMaterial);
+
+  return (
+    <Section label="Material">
+      <Field label="Color">
+        <ColorInput
+          value={obj.material.color}
+          onChange={(v) => updateObjectMaterial(obj.id, { color: v })}
+        />
+      </Field>
+      <Field label="Metalness">
+        <NumberInput
+          value={obj.material.metalness}
+          onChange={(v) => updateObjectMaterial(obj.id, { metalness: v })}
+          step={0.05}
+        />
+      </Field>
+      <Field label="Roughness">
+        <NumberInput
+          value={obj.material.roughness}
+          onChange={(v) => updateObjectMaterial(obj.id, { roughness: v })}
+          step={0.05}
+        />
+      </Field>
+      <Field label="Emissive">
+        <ColorInput
+          value={obj.material.emissive}
+          onChange={(v) => updateObjectMaterial(obj.id, { emissive: v })}
+        />
+      </Field>
+      <Field label="Emit Int.">
+        <NumberInput
+          value={obj.material.emissiveIntensity}
+          onChange={(v) =>
+            updateObjectMaterial(obj.id, { emissiveIntensity: v })
+          }
+          step={0.1}
+        />
+      </Field>
+    </Section>
+  );
+}
+
+function PhysicsEditor({ obj }: { obj: SceneObject }) {
+  const updateObjectPhysics = useEditorStore((s) => s.updateObjectPhysics);
+
+  return (
+    <Section label="Physics" defaultOpen={false}>
+      <Field label="Collider">
+        <SelectInput
+          value={obj.physics.colliderType}
+          onChange={(v) =>
+            updateObjectPhysics(obj.id, {
+              colliderType: v as Physics["colliderType"],
+            })
+          }
+          options={[
+            { value: "none", label: "None" },
+            { value: "cuboid", label: "Cuboid" },
+            { value: "ball", label: "Ball" },
+            { value: "capsule", label: "Capsule" },
+          ]}
+        />
+      </Field>
+      {obj.physics.colliderType !== "none" && (
+        <>
+          <Field label="Mass">
+            <NumberInput
+              value={obj.physics.mass}
+              onChange={(v) => updateObjectPhysics(obj.id, { mass: v })}
+            />
+          </Field>
+          <CheckboxInput
+            value={obj.physics.isStatic}
+            onChange={(v) => updateObjectPhysics(obj.id, { isStatic: v })}
+            label="Static"
+          />
+          <Field label="Bounce">
+            <NumberInput
+              value={obj.physics.restitution}
+              onChange={(v) => updateObjectPhysics(obj.id, { restitution: v })}
+              step={0.05}
+            />
+          </Field>
+          <Field label="Friction">
+            <NumberInput
+              value={obj.physics.friction}
+              onChange={(v) => updateObjectPhysics(obj.id, { friction: v })}
+              step={0.05}
+            />
+          </Field>
+        </>
+      )}
+    </Section>
+  );
+}
+
+function DamageEditor({ obj }: { obj: SceneObject }) {
+  const updateDamage = useEditorStore((s) => s.updateDamage);
+  const dmg = obj.damage || { amount: 0, enabled: false };
+
+  return (
+    <Section label="Damage" defaultOpen={false}>
+      <CheckboxInput
+        value={dmg.enabled}
+        onChange={(v) => updateDamage(obj.id, { enabled: v })}
+        label="Enabled"
+      />
+      {dmg.enabled && (
+        <Field label="Amount">
+          <NumberInput
+            value={dmg.amount}
+            onChange={(v) => updateDamage(obj.id, { amount: v })}
+            step={1}
+          />
+        </Field>
+      )}
+    </Section>
+  );
+}
+
+function LightEditor({ obj }: { obj: SceneObject }) {
+  const updateObjectGeneral = useEditorStore((s) => s.updateObjectGeneral);
+
+  return (
+    <Section label="Light">
+      <Field label="Type">
+        <SelectInput
+          value={obj.lightType || "point"}
+          onChange={(v) =>
+            updateObjectGeneral(obj.id, { lightType: v as LightType })
+          }
+          options={[
+            { value: "ambient", label: "Ambient" },
+            { value: "directional", label: "Directional" },
+            { value: "point", label: "Point" },
+            { value: "spot", label: "Spot" },
+          ]}
+        />
+      </Field>
+      <Field label="Intensity">
+        <NumberInput
+          value={obj.intensity ?? 1}
+          onChange={(v) => updateObjectGeneral(obj.id, { intensity: v })}
+          step={0.1}
+        />
+      </Field>
+      {(obj.lightType === "point" || obj.lightType === "spot") && (
+        <Field label="Distance">
+          <NumberInput
+            value={obj.distance ?? 0}
+            onChange={(v) => updateObjectGeneral(obj.id, { distance: v })}
+          />
+        </Field>
+      )}
+      {obj.lightType === "spot" && (
+        <>
+          <Field label="Angle">
+            <NumberInput
+              value={obj.angle ?? Math.PI / 3}
+              onChange={(v) => updateObjectGeneral(obj.id, { angle: v })}
+              step={0.05}
+            />
+          </Field>
+          <Field label="Penumbra">
+            <NumberInput
+              value={obj.penumbra ?? 0}
+              onChange={(v) => updateObjectGeneral(obj.id, { penumbra: v })}
+              step={0.05}
+            />
+          </Field>
+        </>
+      )}
+    </Section>
+  );
+}
+
+function TextInput({
+  value,
+  onChange,
+  placeholder,
+}: {
+  value: string;
+  onChange: (v: string) => void;
+  placeholder?: string;
+}) {
+  return (
+    <input
+      type="text"
+      value={value}
+      onChange={(e) => onChange(e.target.value)}
+      placeholder={placeholder}
+      className="w-full bg-[#1a1a1a] border border-[#2a2a2a] rounded px-1.5 py-1 sm:py-0.5 text-xs sm:text-[11px] text-[#ccc] outline-none focus:border-[#555] placeholder:text-[#444]"
+    />
+  );
+}
+
+function ModelUrlEditor({ obj }: { obj: SceneObject }) {
+  const updateObjectGeneral = useEditorStore((s) => s.updateObjectGeneral);
+
+  return (
+    <Section label="Model">
+      <Field label="URL">
+        <TextInput
+          value={obj.modelUrl || ""}
+          onChange={(v) => updateObjectGeneral(obj.id, { modelUrl: v })}
+          placeholder="/models/example.glb"
+        />
+      </Field>
+      <p className="text-[9px] text-[#555] leading-relaxed">
+        Enter a URL to a .glb or .gltf file. Place files in public/models/ to
+        use local paths like /models/file.glb
+      </p>
+    </Section>
+  );
+}
+
+function CharacterEditor({ obj }: { obj: SceneObject }) {
+  const updateCharacter = useEditorStore((s) => s.updateCharacter);
+  const role = obj.character?.role || "";
+
+  return (
+    <Section label="Character" defaultOpen={false}>
+      <Field label="Role">
+        <TextInput
+          value={role}
+          onChange={(v) => updateCharacter(obj.id, { role: v })}
+          placeholder="e.g. village guard, merchant"
+        />
+      </Field>
+    </Section>
+  );
+}
+
+function EnvironmentEditor() {
+  const scenes = useEditorStore((s) => s.scenes);
+  const activeSceneId = useEditorStore((s) => s.activeSceneId);
+  const updateEnvironmentSettings = useEditorStore(
+    (s) => s.updateEnvironmentSettings,
+  );
+  const activeScene = scenes.find((s) => s.id === activeSceneId);
+  if (!activeScene) return null;
+  const env = activeScene.environmentSettings;
+
+  return (
+    <Section label="Environment" defaultOpen={false}>
+      <Field label="Preset">
+        <SelectInput
+          value={env.preset}
+          onChange={(v) => updateEnvironmentSettings({ preset: v })}
+          options={[
+            { value: "apartment", label: "Apartment" },
+            { value: "city", label: "City" },
+            { value: "dawn", label: "Dawn" },
+            { value: "forest", label: "Forest" },
+            { value: "lobby", label: "Lobby" },
+            { value: "night", label: "Night" },
+            { value: "park", label: "Park" },
+            { value: "studio", label: "Studio" },
+            { value: "sunset", label: "Sunset" },
+            { value: "warehouse", label: "Warehouse" },
+          ]}
+        />
+      </Field>
+      <Field label="Intensity">
+        <NumberInput
+          value={env.intensity}
+          onChange={(v) => updateEnvironmentSettings({ intensity: v })}
+          step={0.1}
+        />
+      </Field>
+      <Field label="Blur">
+        <NumberInput
+          value={env.blur}
+          onChange={(v) => updateEnvironmentSettings({ blur: v })}
+          step={0.1}
+        />
+      </Field>
+    </Section>
+  );
+}
+
+function FogEditor() {
+  const scenes = useEditorStore((s) => s.scenes);
+  const activeSceneId = useEditorStore((s) => s.activeSceneId);
+  const updateSceneSettings = useEditorStore((s) => s.updateSceneSettings);
+  const activeScene = scenes.find((s) => s.id === activeSceneId);
+  if (!activeScene) return null;
+  const fog = activeScene.sceneSettings.fog;
+
+  return (
+    <Section label="Fog" defaultOpen={false}>
+      <CheckboxInput
+        value={fog.enabled}
+        onChange={(v) => updateSceneSettings({ fog: { ...fog, enabled: v } })}
+        label="Enabled"
+      />
+      {fog.enabled && (
+        <>
+          <Field label="Color">
+            <ColorInput
+              value={fog.color}
+              onChange={(v) =>
+                updateSceneSettings({ fog: { ...fog, color: v } })
+              }
+            />
+          </Field>
+          <Field label="Near">
+            <NumberInput
+              value={fog.near}
+              onChange={(v) =>
+                updateSceneSettings({ fog: { ...fog, near: v } })
+              }
+            />
+          </Field>
+          <Field label="Far">
+            <NumberInput
+              value={fog.far}
+              onChange={(v) => updateSceneSettings({ fog: { ...fog, far: v } })}
+            />
+          </Field>
+        </>
+      )}
+    </Section>
+  );
+}
+
+function GridEditor() {
+  const scenes = useEditorStore((s) => s.scenes);
+  const activeSceneId = useEditorStore((s) => s.activeSceneId);
+  const updateSceneSettings = useEditorStore((s) => s.updateSceneSettings);
+  const activeScene = scenes.find((s) => s.id === activeSceneId);
+  if (!activeScene) return null;
+  const grid = activeScene.sceneSettings.grid;
+
+  return (
+    <Section label="Grid" defaultOpen={false}>
+      <CheckboxInput
+        value={grid.visible}
+        onChange={(v) => updateSceneSettings({ grid: { ...grid, visible: v } })}
+        label="Visible"
+      />
+      {grid.visible && (
+        <>
+          <Field label="Size">
+            <NumberInput
+              value={grid.size}
+              onChange={(v) =>
+                updateSceneSettings({ grid: { ...grid, size: v } })
+              }
+              step={0.5}
+            />
+          </Field>
+          <Field label="Divisions">
+            <NumberInput
+              value={grid.divisions}
+              onChange={(v) =>
+                updateSceneSettings({
+                  grid: { ...grid, divisions: Math.max(1, Math.round(v)) },
+                })
+              }
+              step={1}
+            />
+          </Field>
+          <Field label="Fade Dist">
+            <NumberInput
+              value={grid.fadeDistance}
+              onChange={(v) =>
+                updateSceneSettings({ grid: { ...grid, fadeDistance: v } })
+              }
+              step={10}
+            />
+          </Field>
+          <Field label="Fade Str">
+            <NumberInput
+              value={grid.fadeStrength}
+              onChange={(v) =>
+                updateSceneSettings({ grid: { ...grid, fadeStrength: v } })
+              }
+              step={0.1}
+            />
+          </Field>
+        </>
+      )}
+    </Section>
+  );
+}
+
+export function SceneInspector() {
+  const scenes = useEditorStore((s) => s.scenes);
+  const activeSceneId = useEditorStore((s) => s.activeSceneId);
+  const selectedObjectId = useEditorStore((s) => s.selectedObjectId);
+
+  const activeScene = scenes.find((s) => s.id === activeSceneId);
+  const objects = activeScene?.objects ?? [];
+  const selectedObj = selectedObjectId
+    ? objects.find((o) => o.id === selectedObjectId)
+    : null;
+
+  return (
+    <div className="flex flex-col h-full">
+      {/* Object list */}
+      <Section label="Scene Objects">
+        <div className="space-y-0.5 max-h-40 overflow-y-auto">
+          {objects.map((obj) => (
+            <ObjectListItem key={obj.id} obj={obj} />
+          ))}
+        </div>
+      </Section>
+
+      {/* Selected object editors */}
+      {selectedObj && (
+        <>
+          <div className="px-3 py-1.5 border-b border-[#1e1e1e]">
+            <div className="text-[10px] text-[#555] uppercase tracking-wider">
+              {selectedObj.name}
+            </div>
+          </div>
+          <TransformEditor obj={selectedObj} />
+          {selectedObj.type !== "light" &&
+            selectedObj.type !== "player" &&
+            selectedObj.type !== "sound" && (
+              <MaterialEditor obj={selectedObj} />
+            )}
+          {selectedObj.type !== "light" && selectedObj.type !== "player" && (
+            <PhysicsEditor obj={selectedObj} />
+          )}
+          {selectedObj.type !== "light" &&
+            selectedObj.type !== "player" &&
+            selectedObj.type !== "sound" && <DamageEditor obj={selectedObj} />}
+          {selectedObj.type === "light" && <LightEditor obj={selectedObj} />}
+          {(selectedObj.type === "model" ||
+            selectedObj.type === "character") && (
+            <ModelUrlEditor obj={selectedObj} />
+          )}
+          {selectedObj.type === "character" && (
+            <CharacterEditor obj={selectedObj} />
+          )}
+        </>
+      )}
+
+      {/* Scene-level editors */}
+      <EnvironmentEditor />
+      <FogEditor />
+      <GridEditor />
+    </div>
+  );
+}

examples/game-engine/components/editor/scene-selector.tsx

@@ -0,0 +1,71 @@
+"use client";
+
+import { Copy, Trash2, Plus } from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+
+export function SceneSelector() {
+  const {
+    scenes,
+    activeSceneId,
+    setActiveScene,
+    createScene,
+    duplicateScene,
+    deleteScene,
+  } = useEditorStore();
+
+  return (
+    <div className="flex flex-col h-full">
+      <div className="h-9 flex items-center justify-between px-3 border-b border-[#1e1e1e] flex-shrink-0">
+        <span className="text-[10px] font-semibold text-[#555] uppercase tracking-wider font-mono">
+          Scenes
+        </span>
+        <button
+          onClick={() => createScene(`Scene ${scenes.length + 1}`)}
+          className="p-1 text-[#666] hover:text-white transition-colors"
+          title="New scene"
+        >
+          <Plus size={12} />
+        </button>
+      </div>
+      <div className="flex-1 overflow-y-auto py-1">
+        {scenes.map((scene) => (
+          <div
+            key={scene.id}
+            className={`group flex items-center justify-between px-3 py-1.5 cursor-pointer text-xs ${
+              scene.id === activeSceneId
+                ? "bg-white/8 text-white border-l-2 border-white"
+                : "text-[#888] hover:text-[#ccc] border-l-2 border-transparent"
+            }`}
+            onClick={() => setActiveScene(scene.id)}
+          >
+            <span className="truncate">{scene.name}</span>
+            <div className="hidden group-hover:flex items-center gap-0.5">
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  duplicateScene(scene.id);
+                }}
+                className="p-0.5 text-[#666] hover:text-white"
+                title="Duplicate"
+              >
+                <Copy size={10} />
+              </button>
+              {scenes.length > 1 && (
+                <button
+                  onClick={(e) => {
+                    e.stopPropagation();
+                    deleteScene(scene.id);
+                  }}
+                  className="p-0.5 text-[#666] hover:text-red-400"
+                  title="Delete"
+                >
+                  <Trash2 size={10} />
+                </button>
+              )}
+            </div>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}

examples/game-engine/components/editor/toolbar.tsx

@@ -0,0 +1,268 @@
+"use client";
+
+import { useState } from "react";
+import {
+  Play,
+  Square,
+  Move,
+  RotateCcw,
+  Maximize,
+  MousePointer,
+  Undo2,
+  Redo2,
+  Eye,
+  User,
+} from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+import { SceneDropdown } from "./scene-dropdown";
+
+export function Toolbar() {
+  const {
+    transformMode,
+    setTransformMode,
+    isPlaying,
+    setIsPlaying,
+    canUndo,
+    canRedo,
+    undo,
+    redo,
+    viewMode,
+    setViewMode,
+  } = useEditorStore();
+
+  const [moreOpen, setMoreOpen] = useState(false);
+
+  return (
+    <div
+      className="relative z-20 flex items-center justify-between px-2 sm:px-3 border-b border-[#1e1e1e] bg-[#0f0f0f] shrink-0"
+      style={{ minHeight: 44, paddingTop: "env(safe-area-inset-top, 0px)" }}
+    >
+      {/* Left: Transform modes */}
+      <div className="flex items-center z-10">
+        {!isPlaying && (
+          <>
+            {/* Mobile: collapsed transform dropdown */}
+            <div className="relative flex items-center sm:hidden">
+              <ToolButton
+                icon={
+                  transformMode === "select" ? (
+                    <MousePointer size={16} />
+                  ) : transformMode === "translate" ? (
+                    <Move size={16} />
+                  ) : transformMode === "rotate" ? (
+                    <RotateCcw size={16} />
+                  ) : (
+                    <Maximize size={16} />
+                  )
+                }
+                active
+                onClick={() => setMoreOpen(!moreOpen)}
+                title="Transform mode"
+                size="mobile"
+              />
+              {moreOpen && (
+                <>
+                  <div
+                    className="fixed inset-0 z-40"
+                    onClick={() => setMoreOpen(false)}
+                  />
+                  <div className="absolute top-full left-0 mt-1 bg-[#1a1a1a] border border-[#2a2a2a] rounded-lg shadow-xl z-50 p-1 flex flex-col gap-0.5 min-w-[140px]">
+                    {(
+                      [
+                        {
+                          mode: "select" as const,
+                          icon: MousePointer,
+                          label: "Select",
+                        },
+                        {
+                          mode: "translate" as const,
+                          icon: Move,
+                          label: "Move",
+                        },
+                        {
+                          mode: "rotate" as const,
+                          icon: RotateCcw,
+                          label: "Rotate",
+                        },
+                        {
+                          mode: "scale" as const,
+                          icon: Maximize,
+                          label: "Scale",
+                        },
+                      ] as const
+                    ).map(({ mode, icon: Icon, label }) => (
+                      <button
+                        key={mode}
+                        onClick={() => {
+                          setTransformMode(mode);
+                          setMoreOpen(false);
+                        }}
+                        className={`flex items-center gap-2.5 px-3 py-2.5 rounded text-xs transition-colors ${
+                          transformMode === mode
+                            ? "bg-white/10 text-white"
+                            : "text-[#888] active:bg-white/5"
+                        }`}
+                      >
+                        <Icon size={14} />
+                        {label}
+                      </button>
+                    ))}
+                  </div>
+                </>
+              )}
+              <ToolButton
+                icon={<Undo2 size={16} />}
+                onClick={undo}
+                disabled={!canUndo}
+                title="Undo"
+                size="mobile"
+              />
+              <ToolButton
+                icon={<Redo2 size={16} />}
+                onClick={redo}
+                disabled={!canRedo}
+                title="Redo"
+                size="mobile"
+              />
+            </div>
+
+            {/* Desktop: individual transform buttons */}
+            <div className="hidden sm:flex items-center gap-1">
+              <ToolButton
+                icon={<MousePointer size={14} />}
+                active={transformMode === "select"}
+                onClick={() => setTransformMode("select")}
+                title="Select (Q)"
+              />
+              <ToolButton
+                icon={<Move size={14} />}
+                active={transformMode === "translate"}
+                onClick={() => setTransformMode("translate")}
+                title="Translate (W)"
+              />
+              <ToolButton
+                icon={<RotateCcw size={14} />}
+                active={transformMode === "rotate"}
+                onClick={() => setTransformMode("rotate")}
+                title="Rotate (E)"
+              />
+              <ToolButton
+                icon={<Maximize size={14} />}
+                active={transformMode === "scale"}
+                onClick={() => setTransformMode("scale")}
+                title="Scale (R)"
+              />
+              <div className="w-px h-5 bg-[#2a2a2a] mx-1" />
+              <ToolButton
+                icon={<Undo2 size={14} />}
+                onClick={undo}
+                disabled={!canUndo}
+                title="Undo (Ctrl+Z)"
+              />
+              <ToolButton
+                icon={<Redo2 size={14} />}
+                onClick={redo}
+                disabled={!canRedo}
+                title="Redo (Ctrl+Shift+Z)"
+              />
+            </div>
+          </>
+        )}
+      </div>
+
+      {/* Center: Scene selector (absolutely centered) */}
+      <div
+        className="absolute inset-0 flex items-center justify-center pointer-events-none"
+        style={{ paddingTop: "env(safe-area-inset-top, 0px)" }}
+      >
+        <div className="pointer-events-auto">
+          {!isPlaying && <SceneDropdown />}
+        </div>
+      </div>
+
+      {/* Right: Play/View controls */}
+      <div className="flex items-center z-10">
+        {isPlaying && (
+          <>
+            {/* Mobile view mode buttons */}
+            <div className="flex items-center sm:hidden">
+              <ToolButton
+                icon={<Eye size={16} />}
+                active={viewMode === "first-person"}
+                onClick={() => setViewMode("first-person")}
+                title="First Person"
+                size="mobile"
+              />
+              <ToolButton
+                icon={<User size={16} />}
+                active={viewMode === "third-person"}
+                onClick={() => setViewMode("third-person")}
+                title="Third Person"
+                size="mobile"
+              />
+            </div>
+            {/* Desktop view mode buttons */}
+            <div className="hidden sm:flex items-center">
+              <ToolButton
+                icon={<Eye size={14} />}
+                active={viewMode === "first-person"}
+                onClick={() => setViewMode("first-person")}
+                title="First Person"
+              />
+              <ToolButton
+                icon={<User size={14} />}
+                active={viewMode === "third-person"}
+                onClick={() => setViewMode("third-person")}
+                title="Third Person"
+              />
+              <div className="w-px h-5 bg-[#2a2a2a] mx-1" />
+            </div>
+          </>
+        )}
+        <button
+          onClick={() => setIsPlaying(!isPlaying)}
+          className="flex items-center gap-1 sm:gap-1.5 px-2.5 sm:px-3 py-1.5 sm:py-1 rounded text-xs font-medium transition-colors bg-white/10 hover:bg-white/20 active:bg-white/20 text-white"
+        >
+          {isPlaying ? <Square size={12} /> : <Play size={12} />}
+          {isPlaying ? "Stop" : "Play"}
+        </button>
+      </div>
+    </div>
+  );
+}
+
+function ToolButton({
+  icon,
+  active,
+  onClick,
+  disabled,
+  title,
+  size,
+}: {
+  icon: React.ReactNode;
+  active?: boolean;
+  onClick: () => void;
+  disabled?: boolean;
+  title?: string;
+  size?: "mobile" | "desktop";
+}) {
+  const isMobileSize = size === "mobile";
+  return (
+    <button
+      onClick={onClick}
+      disabled={disabled}
+      title={title}
+      className={`${isMobileSize ? "p-2.5 min-w-[44px] min-h-[44px]" : "p-1.5"} rounded transition-colors flex items-center justify-center ${
+        active
+          ? isMobileSize
+            ? "text-white"
+            : "bg-white/10 text-white"
+          : disabled
+            ? "text-[#444] cursor-not-allowed"
+            : "text-[#888] hover:text-white hover:bg-white/5 active:bg-white/10"
+      }`}
+    >
+      {icon}
+    </button>
+  );
+}

examples/game-engine/components/editor/transform-controls.tsx

@@ -0,0 +1,164 @@
+"use client";
+
+import { useRef, useEffect, useCallback } from "react";
+import { useThree } from "@react-three/fiber";
+import { TransformControls, OrbitControls } from "@react-three/drei";
+import * as THREE from "three";
+import { useEditorStore } from "@/lib/store";
+
+export function EditorControls() {
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+
+  if (isPlaying) return null;
+
+  return (
+    <>
+      <EditorOrbitControls />
+      <TransformGizmo />
+    </>
+  );
+}
+
+function EditorOrbitControls() {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const orbitRef = useRef<any>(null);
+
+  useEffect(() => {
+    const enable = () => {
+      if (orbitRef.current) orbitRef.current.enabled = false;
+    };
+    const disable = () => {
+      if (orbitRef.current) orbitRef.current.enabled = true;
+    };
+
+    window.addEventListener("transform-start", enable);
+    window.addEventListener("transform-end", disable);
+    return () => {
+      window.removeEventListener("transform-start", enable);
+      window.removeEventListener("transform-end", disable);
+    };
+  }, []);
+
+  return (
+    <OrbitControls
+      ref={orbitRef}
+      makeDefault
+      enableDamping
+      dampingFactor={0.1}
+      minDistance={1}
+      maxDistance={200}
+    />
+  );
+}
+
+function TransformGizmo() {
+  const {
+    selectedObjectId,
+    transformMode,
+    isPlaying,
+    updateObjectTransform,
+    saveToHistory,
+  } = useEditorStore();
+  const { scene } = useThree();
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const controlsRef = useRef<any>(null);
+
+  const findObjectById = useCallback(
+    (id: string): THREE.Object3D | null => {
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      let found: any = null;
+      scene.traverse((child) => {
+        if (child.userData?.id === id || child.userData?.objectId === id) {
+          found = child;
+        }
+      });
+      return found;
+    },
+    [scene],
+  );
+
+  useEffect(() => {
+    if (
+      !controlsRef.current ||
+      !selectedObjectId ||
+      isPlaying ||
+      transformMode === "select"
+    ) {
+      if (controlsRef.current) {
+        try {
+          controlsRef.current.detach();
+        } catch {
+          /* may not be attached */
+        }
+      }
+      return;
+    }
+
+    const timer = setTimeout(() => {
+      const obj = findObjectById(selectedObjectId);
+      if (obj && controlsRef.current) {
+        try {
+          controlsRef.current.attach(obj);
+        } catch {
+          /* object may not be ready */
+        }
+      }
+    }, 50);
+
+    return () => clearTimeout(timer);
+  }, [selectedObjectId, transformMode, isPlaying, findObjectById]);
+
+  useEffect(() => {
+    const controls = controlsRef.current;
+    if (!controls) return;
+
+    const onDragStart = () =>
+      window.dispatchEvent(new CustomEvent("transform-start"));
+    const onDragEnd = () =>
+      window.dispatchEvent(new CustomEvent("transform-end"));
+
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    controls.addEventListener("dragging-changed", (e: any) => {
+      if (e.value) onDragStart();
+      else onDragEnd();
+    });
+
+    return () => {
+      controls.removeEventListener("dragging-changed", onDragStart);
+    };
+  }, []);
+
+  const handleChange = useCallback(() => {
+    if (!controlsRef.current || !selectedObjectId) return;
+    const obj = controlsRef.current.object;
+    if (!obj) return;
+
+    updateObjectTransform(selectedObjectId, {
+      position: [obj.position.x, obj.position.y, obj.position.z],
+      rotation: [obj.rotation.x, obj.rotation.y, obj.rotation.z],
+      scale: [obj.scale.x, obj.scale.y, obj.scale.z],
+    });
+  }, [selectedObjectId, updateObjectTransform]);
+
+  const handleMouseUp = useCallback(() => {
+    saveToHistory();
+  }, [saveToHistory]);
+
+  if (!selectedObjectId || isPlaying || transformMode === "select") return null;
+
+  const mode =
+    transformMode === "translate"
+      ? "translate"
+      : transformMode === "rotate"
+        ? "rotate"
+        : "scale";
+
+  return (
+    <TransformControls
+      ref={controlsRef}
+      mode={mode}
+      onObjectChange={handleChange}
+      onMouseUp={handleMouseUp}
+    />
+  );
+}

examples/game-engine/components/game-engine.tsx

@@ -0,0 +1,233 @@
+"use client";
+
+import { useMemo, useEffect, Suspense, useState } from "react";
+import { Canvas } from "@react-three/fiber";
+import { Physics } from "@react-three/rapier";
+import { ThreeRenderer } from "@json-render/react-three-fiber";
+import { Braces, SlidersHorizontal, X } from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+import { registry } from "@/lib/registry";
+import { sceneToSpec } from "@/lib/scene-to-spec";
+import { Toolbar } from "@/components/editor/toolbar";
+import { SceneInspector } from "@/components/editor/scene-inspector";
+import { AddObjectButton } from "@/components/editor/add-object-button";
+import { EditorControls } from "@/components/editor/transform-controls";
+import { JsonPane } from "@/components/editor/json-pane";
+import { AIPrompt } from "@/components/editor/ai-prompt";
+import { HealthBar } from "@/components/hud/health-bar";
+import { DamageEffect } from "@/components/hud/damage-effect";
+import { GameOverScreen } from "@/components/hud/game-over";
+import { CharacterDialog } from "@/components/hud/character-dialog";
+import { InteractionPrompt } from "@/components/hud/interaction-prompt";
+import { InGamePrompt } from "@/components/hud/in-game-prompt";
+import { DamageSound } from "@/components/hud/damage-sound";
+import { DeathSound } from "@/components/hud/death-sound";
+import { LoadingSpinner } from "@/components/hud/loading-spinner";
+import { TouchControls } from "@/components/hud/touch-controls";
+import { CharacterInteraction } from "@/components/game/character-interaction";
+import { DropZone } from "@/components/editor/drop-zone";
+
+export function GameEngine() {
+  const scenes = useEditorStore((s) => s.scenes);
+  const activeSceneId = useEditorStore((s) => s.activeSceneId);
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const setIsPlaying = useEditorStore((s) => s.setIsPlaying);
+  const selectedObjectId = useEditorStore((s) => s.selectedObjectId);
+  const health = useEditorStore((s) => s.health);
+  const lastDamageTime = useEditorStore((s) => s.lastDamageTime);
+  const undo = useEditorStore((s) => s.undo);
+  const redo = useEditorStore((s) => s.redo);
+  const removeObject = useEditorStore((s) => s.removeObject);
+  const isMobile = useIsMobile();
+
+  const [leftDrawer, setLeftDrawer] = useState(false);
+  const [rightDrawer, setRightDrawer] = useState(false);
+
+  const activeScene = useMemo(
+    () => scenes.find((s) => s.id === activeSceneId) || scenes[0],
+    [scenes, activeSceneId],
+  );
+
+  const spec = useMemo(() => {
+    if (!activeScene) return null;
+    return sceneToSpec(activeScene);
+  }, [activeScene]);
+
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      const isMod = e.metaKey || e.ctrlKey;
+
+      if (isMod && e.key === "Enter") {
+        e.preventDefault();
+        setIsPlaying(!isPlaying);
+        return;
+      }
+
+      if (isMod && (e.key === "Backspace" || e.key === "Delete")) {
+        e.preventDefault();
+        if (selectedObjectId && !isPlaying) {
+          removeObject(selectedObjectId);
+        }
+        return;
+      }
+
+      if (isMod && e.key === "z" && !e.shiftKey) {
+        e.preventDefault();
+        undo();
+        return;
+      }
+
+      if (isMod && (e.key === "y" || (e.key === "z" && e.shiftKey))) {
+        e.preventDefault();
+        redo();
+        return;
+      }
+    };
+
+    window.addEventListener("keydown", handleKeyDown);
+    return () => window.removeEventListener("keydown", handleKeyDown);
+  }, [isPlaying, setIsPlaying, selectedObjectId, removeObject, undo, redo]);
+
+  useEffect(() => {
+    if (isPlaying) {
+      setLeftDrawer(false);
+      setRightDrawer(false);
+    }
+  }, [isPlaying]);
+
+  const showSidebars = !isPlaying;
+
+  return (
+    <div className="h-dvh w-screen flex flex-col bg-[#0a0a0a] overflow-hidden">
+      <Toolbar />
+
+      <div className="flex flex-1 min-h-0 relative">
+        {/* Left sidebar - JSON Pane (desktop only) */}
+        {showSidebars && (
+          <div className="hidden sm:block w-72 shrink-0 border-r border-[#1e1e1e] bg-[#0f0f0f] overflow-hidden">
+            <JsonPane />
+          </div>
+        )}
+
+        {/* Mobile left drawer */}
+        {showSidebars && (
+          <>
+            <div
+              className={`fixed inset-0 bg-black/50 z-30 transition-opacity duration-200 ${leftDrawer ? "opacity-100" : "opacity-0 pointer-events-none"}`}
+              onClick={() => setLeftDrawer(false)}
+            />
+            <div
+              className={`fixed left-0 top-0 bottom-0 w-72 max-w-[85vw] bg-[#0f0f0f] border-r border-[#1e1e1e] z-40 overflow-hidden transition-transform duration-200 ease-out ${leftDrawer ? "translate-x-0" : "-translate-x-full"}`}
+              style={{ paddingTop: "env(safe-area-inset-top, 0px)" }}
+            >
+              <div className="flex items-center justify-between px-3 py-2 border-b border-[#1e1e1e]">
+                <span className="text-[10px] font-semibold text-[#666] uppercase tracking-wider">
+                  JSON Spec
+                </span>
+                <button
+                  onClick={() => setLeftDrawer(false)}
+                  className="p-1.5 text-[#666] hover:text-white active:text-white"
+                >
+                  <X size={14} />
+                </button>
+              </div>
+              <JsonPane />
+            </div>
+          </>
+        )}
+
+        {/* Canvas area */}
+        <div className="flex-1 relative min-w-0 safe-bottom">
+          <DropZone />
+          <Canvas
+            shadows
+            camera={{ position: [5, 5, 5], fov: 50 }}
+            style={{ width: "100%", height: "100%", touchAction: "none" }}
+          >
+            <Suspense fallback={null}>
+              {isPlaying ? (
+                <Physics gravity={[0, -9.81, 0]}>
+                  <ThreeRenderer spec={spec} registry={registry} />
+                  <CharacterInteraction />
+                </Physics>
+              ) : (
+                <>
+                  <ThreeRenderer spec={spec} registry={registry} />
+                  <EditorControls />
+                </>
+              )}
+            </Suspense>
+          </Canvas>
+
+          {/* Mobile drawer toggle buttons */}
+          {showSidebars && (
+            <>
+              <button
+                onClick={() => setLeftDrawer(true)}
+                className="sm:hidden absolute top-2 left-2 z-10 w-11 h-11 flex items-center justify-center rounded-full bg-white/10 active:bg-white/30 text-white transition-colors backdrop-blur-sm"
+              >
+                <Braces size={18} />
+              </button>
+              <button
+                onClick={() => setRightDrawer(true)}
+                className="sm:hidden absolute top-2 right-2 z-10 w-11 h-11 flex items-center justify-center rounded-full bg-white/10 active:bg-white/30 text-white transition-colors backdrop-blur-sm"
+              >
+                <SlidersHorizontal size={18} />
+              </button>
+            </>
+          )}
+
+          {!isPlaying && <AddObjectButton />}
+          {!isPlaying && <AIPrompt />}
+
+          <LoadingSpinner />
+
+          {isPlaying && <HealthBar />}
+          {isPlaying && <DamageEffect lastDamageTime={lastDamageTime} />}
+          {isPlaying && health <= 0 && <GameOverScreen />}
+          {isPlaying && <CharacterDialog />}
+          {isPlaying && <InteractionPrompt />}
+          {isPlaying && <InGamePrompt />}
+          {isPlaying && isMobile && <TouchControls />}
+          <DamageSound />
+          <DeathSound />
+        </div>
+
+        {/* Right sidebar - Inspector (desktop only) */}
+        {showSidebars && (
+          <div className="hidden sm:block w-72 shrink-0 border-l border-[#1e1e1e] bg-[#0f0f0f] overflow-y-auto">
+            <SceneInspector />
+          </div>
+        )}
+
+        {/* Mobile right drawer */}
+        {showSidebars && (
+          <>
+            <div
+              className={`fixed inset-0 bg-black/50 z-30 transition-opacity duration-200 ${rightDrawer ? "opacity-100" : "opacity-0 pointer-events-none"}`}
+              onClick={() => setRightDrawer(false)}
+            />
+            <div
+              className={`fixed right-0 top-0 bottom-0 w-72 max-w-[85vw] bg-[#0f0f0f] border-l border-[#1e1e1e] z-40 overflow-y-auto transition-transform duration-200 ease-out ${rightDrawer ? "translate-x-0" : "translate-x-full"}`}
+              style={{ paddingTop: "env(safe-area-inset-top, 0px)" }}
+            >
+              <div className="flex items-center justify-between px-3 py-2 border-b border-[#1e1e1e]">
+                <span className="text-[10px] font-semibold text-[#666] uppercase tracking-wider">
+                  Inspector
+                </span>
+                <button
+                  onClick={() => setRightDrawer(false)}
+                  className="p-1.5 text-[#666] hover:text-white active:text-white"
+                >
+                  <X size={14} />
+                </button>
+              </div>
+              <SceneInspector />
+            </div>
+          </>
+        )}
+      </div>
+    </div>
+  );
+}

examples/game-engine/components/game/character-interaction.tsx

@@ -0,0 +1,114 @@
+"use client";
+
+import { useEffect, useMemo, useState } from "react";
+import { useThree } from "@react-three/fiber";
+import * as THREE from "three";
+import { useEditorStore } from "@/lib/store";
+
+export function CharacterInteraction() {
+  const [nearbyCharacter, setNearbyCharacter] = useState<{
+    id: string;
+    role: string;
+  } | null>(null);
+  const { camera } = useThree();
+  const scenes = useEditorStore((s) => s.scenes);
+  const activeSceneId = useEditorStore((s) => s.activeSceneId);
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+
+  const activeScene = scenes.find((s) => s.id === activeSceneId) || scenes[0];
+  const objects = useMemo(
+    () => (activeScene ? activeScene.objects : []),
+    [activeScene],
+  );
+
+  useEffect(() => {
+    if (!isPlaying) {
+      setNearbyCharacter(null);
+      return;
+    }
+
+    const checkProximity = () => {
+      if (!camera) return;
+
+      const cameraPos = new THREE.Vector3();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+      camera.getWorldPosition(cameraPos as any);
+
+      const characters = objects.filter(
+        (obj) => obj.type === "character" && obj.visible,
+      );
+
+      let closest: { id: string; role: string } | null = null;
+      let closestDist = Infinity;
+
+      for (const character of characters) {
+        const charPos = new THREE.Vector3(...character.position);
+        const dist = cameraPos.distanceTo(charPos);
+
+        if (dist < 3 && dist < closestDist) {
+          closestDist = dist;
+          closest = {
+            id: character.id,
+            role: character.character?.role || "villager",
+          };
+        }
+      }
+
+      if (closest) {
+        if (!nearbyCharacter || nearbyCharacter.id !== closest.id) {
+          setNearbyCharacter(closest);
+          window.dispatchEvent(
+            new CustomEvent("character-nearby", {
+              detail: { id: closest.id, role: closest.role },
+            }),
+          );
+        }
+      } else if (nearbyCharacter) {
+        setNearbyCharacter(null);
+        window.dispatchEvent(new CustomEvent("character-far"));
+      }
+    };
+
+    const intervalId = setInterval(checkProximity, 200);
+
+    const triggerInteract = () => {
+      if (nearbyCharacter) {
+        window.dispatchEvent(
+          new CustomEvent("character-interact", {
+            detail: {
+              id: nearbyCharacter.id,
+              role: nearbyCharacter.role,
+            },
+          }),
+        );
+      }
+    };
+
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === "e" || e.key === "E") {
+        triggerInteract();
+      }
+    };
+
+    const handleRequestInteract = () => {
+      triggerInteract();
+    };
+
+    window.addEventListener("keydown", handleKeyDown);
+    window.addEventListener(
+      "request-character-interact",
+      handleRequestInteract,
+    );
+
+    return () => {
+      clearInterval(intervalId);
+      window.removeEventListener("keydown", handleKeyDown);
+      window.removeEventListener(
+        "request-character-interact",
+        handleRequestInteract,
+      );
+    };
+  }, [camera, isPlaying, nearbyCharacter, objects]);
+
+  return null;
+}

examples/game-engine/components/game/character.tsx

@@ -0,0 +1,73 @@
+"use client";
+
+import { useRef, useState } from "react";
+import { useFrame, useThree } from "@react-three/fiber";
+import { useGLTF } from "@react-three/drei";
+import * as THREE from "three";
+import { useEditorStore } from "@/lib/store";
+
+interface GameCharacterProps {
+  position?: [number, number, number] | null;
+  rotation?: [number, number, number] | null;
+  scale?: [number, number, number] | null;
+  castShadow?: boolean | null;
+  receiveShadow?: boolean | null;
+  modelUrl: string;
+  role?: string | null;
+  physics?: {
+    mass?: number | null;
+    isStatic?: boolean | null;
+    restitution?: number | null;
+    friction?: number | null;
+    colliderType?: string | null;
+  } | null;
+  objectId?: string | null;
+}
+
+export function GameCharacter({
+  position,
+  rotation,
+  scale,
+  modelUrl,
+}: GameCharacterProps) {
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+  const groupRef = useRef<THREE.Group>(null);
+  const { camera } = useThree();
+  const [isNear, setIsNear] = useState(false);
+
+  useFrame(() => {
+    if (!isPlaying || !groupRef.current) return;
+    const dist = groupRef.current.position.distanceTo(camera.position);
+    setIsNear(dist < 3);
+  });
+
+  if (!modelUrl) {
+    return (
+      <group position={pos} rotation={rot} scale={scl} ref={groupRef}>
+        <mesh castShadow>
+          <capsuleGeometry args={[0.3, 0.8, 8, 16]} />
+          <meshStandardMaterial color="#e74c3c" />
+        </mesh>
+      </group>
+    );
+  }
+
+  return (
+    <group ref={groupRef} position={pos} rotation={rot} scale={scl}>
+      <CharacterModel url={modelUrl} />
+      {isPlaying && isNear && (
+        <sprite position={[0, 2.2, 0]} scale={[0.5, 0.5, 0.5]}>
+          <spriteMaterial color="#ffffff" opacity={0.8} transparent />
+        </sprite>
+      )}
+    </group>
+  );
+}
+
+function CharacterModel({ url }: { url: string }) {
+  const { scene } = useGLTF(url);
+  return <primitive object={scene.clone()} />;
+}

examples/game-engine/components/game/game-light.tsx

@@ -0,0 +1,77 @@
+"use client";
+
+interface GameLightProps {
+  position?: [number, number, number] | null;
+  rotation?: [number, number, number] | null;
+  scale?: [number, number, number] | null;
+  lightType: "ambient" | "directional" | "point" | "spot";
+  color?: string | null;
+  intensity?: number | null;
+  distance?: number | null;
+  decay?: number | null;
+  angle?: number | null;
+  penumbra?: number | null;
+  castShadow?: boolean | null;
+  objectId?: string | null;
+}
+
+export function GameLight({
+  position,
+  lightType,
+  color,
+  intensity,
+  distance,
+  decay,
+  angle,
+  penumbra,
+  castShadow,
+}: GameLightProps) {
+  const c = color ?? "#ffffff";
+  const i = intensity ?? 1;
+
+  switch (lightType) {
+    case "ambient":
+      return <ambientLight color={c} intensity={i} />;
+    case "directional":
+      return (
+        <directionalLight
+          position={position ?? [5, 10, 5]}
+          color={c}
+          intensity={i}
+          castShadow={castShadow ?? true}
+          shadow-mapSize-width={2048}
+          shadow-mapSize-height={2048}
+          shadow-camera-far={50}
+          shadow-camera-left={-20}
+          shadow-camera-right={20}
+          shadow-camera-top={20}
+          shadow-camera-bottom={-20}
+        />
+      );
+    case "spot":
+      return (
+        <spotLight
+          position={position ?? [0, 5, 0]}
+          color={c}
+          intensity={i}
+          distance={distance ?? 0}
+          decay={decay ?? 2}
+          angle={angle ?? Math.PI / 3}
+          penumbra={penumbra ?? 0}
+          castShadow={castShadow ?? true}
+        />
+      );
+    case "point":
+    default:
+      return (
+        <pointLight
+          position={position ?? [0, 3, 0]}
+          color={c}
+          intensity={i}
+          distance={distance ?? 0}
+          decay={decay ?? 2}
+          castShadow={castShadow ?? false}
+        />
+      );
+  }
+}

examples/game-engine/components/game/game-primitives.tsx

@@ -0,0 +1,799 @@
+"use client";
+
+import { useRef, useEffect } from "react";
+import * as THREE from "three";
+import { RigidBody } from "@react-three/rapier";
+import type { RapierRigidBody } from "@react-three/rapier";
+import { useEditorStore } from "@/lib/store";
+
+interface PhysicsProps {
+  mass?: number | null;
+  isStatic?: boolean | null;
+  restitution?: number | null;
+  friction?: number | null;
+  colliderType?: string | null;
+}
+
+interface DamageProps {
+  amount?: number | null;
+  enabled?: boolean | null;
+}
+
+interface MaterialProps {
+  color?: string | null;
+  metalness?: number | null;
+  roughness?: number | null;
+  emissive?: string | null;
+  emissiveIntensity?: number | null;
+  opacity?: number | null;
+  transparent?: boolean | null;
+  wireframe?: boolean | null;
+}
+
+interface GamePrimitiveProps {
+  position?: [number, number, number] | null;
+  rotation?: [number, number, number] | null;
+  scale?: [number, number, number] | null;
+  castShadow?: boolean | null;
+  receiveShadow?: boolean | null;
+  material?: MaterialProps | null;
+  physics?: PhysicsProps | null;
+  damage?: DamageProps | null;
+  objectId?: string | null;
+  children?: React.ReactNode;
+}
+
+function buildMaterialProps(mat?: MaterialProps | null) {
+  if (!mat) return { color: "#888888" };
+  return {
+    color: mat.color ?? "#888888",
+    metalness: mat.metalness ?? 0,
+    roughness: mat.roughness ?? 0.5,
+    ...(mat.emissive ? { emissive: mat.emissive } : {}),
+    ...(mat.emissiveIntensity
+      ? { emissiveIntensity: mat.emissiveIntensity }
+      : {}),
+    ...(mat.opacity != null ? { opacity: mat.opacity, transparent: true } : {}),
+    ...(mat.wireframe ? { wireframe: true } : {}),
+  };
+}
+
+function PhysicsWrapper({
+  physics,
+  damage,
+  position,
+  rotation,
+  scale,
+  children,
+}: {
+  physics?: PhysicsProps | null;
+  damage?: DamageProps | null;
+  position: [number, number, number];
+  rotation: [number, number, number];
+  scale: [number, number, number];
+  children: React.ReactNode;
+}) {
+  const bodyRef = useRef<RapierRigidBody>(null);
+  const takeDamage = useEditorStore((s) => s.takeDamage);
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+
+  const hasPhysics =
+    physics && physics.colliderType && physics.colliderType !== "none";
+  const hasDamage = damage?.enabled && (damage.amount ?? 0) > 0;
+
+  if (!hasPhysics || !isPlaying) {
+    return (
+      <group position={position} rotation={rotation} scale={scale}>
+        {children}
+      </group>
+    );
+  }
+
+  return (
+    <RigidBody
+      ref={bodyRef}
+      type={physics.isStatic ? "fixed" : "dynamic"}
+      position={position}
+      rotation={rotation}
+      mass={physics.mass ?? 1}
+      restitution={physics.restitution ?? 0.2}
+      friction={physics.friction ?? 0.5}
+      onCollisionEnter={
+        hasDamage
+          ? () => {
+              takeDamage(damage!.amount!);
+            }
+          : undefined
+      }
+    >
+      <group scale={scale}>{children}</group>
+    </RigidBody>
+  );
+}
+
+export function GameBox({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  width,
+  height,
+  depth,
+}: GamePrimitiveProps & {
+  width?: number | null;
+  height?: number | null;
+  depth?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <boxGeometry args={[width ?? 1, height ?? 1, depth ?? 1]} />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameSphere({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  radius,
+  widthSegments,
+  heightSegments,
+}: GamePrimitiveProps & {
+  radius?: number | null;
+  widthSegments?: number | null;
+  heightSegments?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <sphereGeometry
+          args={[radius ?? 1, widthSegments ?? 32, heightSegments ?? 16]}
+        />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameCylinder({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  radiusTop,
+  radiusBottom,
+  height,
+  radialSegments,
+}: GamePrimitiveProps & {
+  radiusTop?: number | null;
+  radiusBottom?: number | null;
+  height?: number | null;
+  radialSegments?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <cylinderGeometry
+          args={[
+            radiusTop ?? 1,
+            radiusBottom ?? 1,
+            height ?? 1,
+            radialSegments ?? 32,
+          ]}
+        />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameCone({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  radius,
+  height,
+  radialSegments,
+}: GamePrimitiveProps & {
+  radius?: number | null;
+  height?: number | null;
+  radialSegments?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <coneGeometry args={[radius ?? 1, height ?? 1, radialSegments ?? 32]} />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameTorus({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  radius,
+  tube,
+  radialSegments,
+  tubularSegments,
+}: GamePrimitiveProps & {
+  radius?: number | null;
+  tube?: number | null;
+  radialSegments?: number | null;
+  tubularSegments?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <torusGeometry
+          args={[
+            radius ?? 1,
+            tube ?? 0.4,
+            radialSegments ?? 16,
+            tubularSegments ?? 48,
+          ]}
+        />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GamePlane({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  width,
+  height,
+}: GamePrimitiveProps & { width?: number | null; height?: number | null }) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? true}
+      >
+        <planeGeometry args={[width ?? 1, height ?? 1]} />
+        <meshStandardMaterial
+          {...buildMaterialProps(material)}
+          side={THREE.DoubleSide}
+        />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameCapsule({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  radius,
+  length,
+}: GamePrimitiveProps & {
+  radius?: number | null;
+  length?: number | null;
+  capSegments?: number | null;
+  radialSegments?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <capsuleGeometry args={[radius ?? 0.5, length ?? 1, 16, 32]} />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameKnot({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  radius,
+  tube,
+  tubularSegments,
+  radialSegments,
+  p,
+  q,
+}: GamePrimitiveProps & {
+  radius?: number | null;
+  tube?: number | null;
+  tubularSegments?: number | null;
+  radialSegments?: number | null;
+  p?: number | null;
+  q?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <torusKnotGeometry
+          args={[
+            radius ?? 1,
+            tube ?? 0.3,
+            tubularSegments ?? 64,
+            radialSegments ?? 8,
+            p ?? 2,
+            q ?? 3,
+          ]}
+        />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+function PolyhedronPrimitive({
+  Geometry,
+  ...props
+}: GamePrimitiveProps & {
+  Geometry: "tetrahedron" | "octahedron" | "dodecahedron" | "icosahedron";
+  radius?: number | null;
+}) {
+  const pos: [number, number, number] = props.position ?? [0, 0, 0];
+  const rot: [number, number, number] = props.rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = props.scale ?? [1, 1, 1];
+  const r = props.radius ?? 1;
+
+  const geoElement = {
+    tetrahedron: <tetrahedronGeometry args={[r]} />,
+    octahedron: <octahedronGeometry args={[r]} />,
+    dodecahedron: <dodecahedronGeometry args={[r]} />,
+    icosahedron: <icosahedronGeometry args={[r]} />,
+  }[Geometry];
+
+  return (
+    <PhysicsWrapper
+      physics={props.physics}
+      damage={props.damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={props.castShadow ?? false}
+        receiveShadow={props.receiveShadow ?? false}
+      >
+        {geoElement}
+        <meshStandardMaterial {...buildMaterialProps(props.material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameTetrahedron(
+  props: GamePrimitiveProps & { radius?: number | null },
+) {
+  return <PolyhedronPrimitive {...props} Geometry="tetrahedron" />;
+}
+
+export function GameOctahedron(
+  props: GamePrimitiveProps & { radius?: number | null },
+) {
+  return <PolyhedronPrimitive {...props} Geometry="octahedron" />;
+}
+
+export function GameDodecahedron(
+  props: GamePrimitiveProps & { radius?: number | null },
+) {
+  return <PolyhedronPrimitive {...props} Geometry="dodecahedron" />;
+}
+
+export function GameIcosahedron(
+  props: GamePrimitiveProps & { radius?: number | null },
+) {
+  return <PolyhedronPrimitive {...props} Geometry="icosahedron" />;
+}
+
+export function GameExtrude({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  shapeData,
+  depth,
+}: GamePrimitiveProps & {
+  shapeData?: {
+    points: [number, number][];
+    holes?: [number, number][][];
+  } | null;
+  depth?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  const shape = new THREE.Shape();
+  const pts = shapeData?.points ?? [
+    [-0.5, -0.5],
+    [0.5, -0.5],
+    [0.5, 0.5],
+    [-0.5, 0.5],
+  ];
+  if (pts.length > 0) {
+    shape.moveTo(pts[0]![0], pts[0]![1]);
+    for (let i = 1; i < pts.length; i++) {
+      shape.lineTo(pts[i]![0], pts[i]![1]);
+    }
+    shape.closePath();
+  }
+  if (shapeData?.holes) {
+    for (const hole of shapeData.holes) {
+      const holePath = new THREE.Path();
+      if (hole.length > 0) {
+        holePath.moveTo(hole[0]![0], hole[0]![1]);
+        for (let i = 1; i < hole.length; i++) {
+          holePath.lineTo(hole[i]![0], hole[i]![1]);
+        }
+        holePath.closePath();
+        shape.holes.push(holePath);
+      }
+    }
+  }
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <extrudeGeometry
+          args={[
+            // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+            shape as any,
+            { depth: depth ?? 1, bevelEnabled: false },
+          ]}
+        />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameTube({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  radius,
+  tubularSegments,
+  radialSegments,
+}: GamePrimitiveProps & {
+  radius?: number | null;
+  tubularSegments?: number | null;
+  radialSegments?: number | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  const curve = new THREE.CatmullRomCurve3([
+    new THREE.Vector3(-1, 0, 0),
+    new THREE.Vector3(-0.5, 0.5, 0),
+    new THREE.Vector3(0.5, -0.5, 0),
+    new THREE.Vector3(1, 0, 0),
+  ]);
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <tubeGeometry
+          args={[
+            // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+            curve as any,
+            tubularSegments ?? 64,
+            radius ?? 0.1,
+            radialSegments ?? 8,
+            false,
+          ]}
+        />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameShape({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  shapeData,
+}: GamePrimitiveProps & {
+  shapeData?: {
+    points: [number, number][];
+    holes?: [number, number][][];
+  } | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  const shape = new THREE.Shape();
+  const pts = shapeData?.points ?? [
+    [-0.5, -0.5],
+    [0.5, -0.5],
+    [0, 0.5],
+  ];
+  if (pts.length > 0) {
+    shape.moveTo(pts[0]![0], pts[0]![1]);
+    for (let i = 1; i < pts.length; i++) {
+      shape.lineTo(pts[i]![0], pts[i]![1]);
+    }
+    shape.closePath();
+  }
+  if (shapeData?.holes) {
+    for (const hole of shapeData.holes) {
+      const holePath = new THREE.Path();
+      if (hole.length > 0) {
+        holePath.moveTo(hole[0]![0], hole[0]![1]);
+        for (let i = 1; i < hole.length; i++) {
+          holePath.lineTo(hole[i]![0], hole[i]![1]);
+        }
+        holePath.closePath();
+        shape.holes.push(holePath);
+      }
+    }
+  }
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        {/* eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch */}
+        <shapeGeometry args={[shape as any]} />
+        <meshStandardMaterial
+          {...buildMaterialProps(material)}
+          side={THREE.DoubleSide}
+        />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}
+
+export function GameMesh({
+  position,
+  rotation,
+  scale,
+  castShadow,
+  receiveShadow,
+  material,
+  physics,
+  damage,
+  meshData,
+}: GamePrimitiveProps & {
+  meshData?: {
+    vertices: number[];
+    indices: number[];
+    normals?: number[];
+    uvs?: number[];
+  } | null;
+}) {
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  const meshRef = useRef<THREE.Mesh>(null);
+
+  useEffect(() => {
+    if (!meshRef.current || !meshData) return;
+    const geometry = new THREE.BufferGeometry();
+    geometry.setAttribute(
+      "position",
+      new THREE.Float32BufferAttribute(meshData.vertices, 3),
+    );
+    if (meshData.indices.length > 0) {
+      geometry.setIndex(meshData.indices);
+    }
+    if (meshData.normals) {
+      geometry.setAttribute(
+        "normal",
+        new THREE.Float32BufferAttribute(meshData.normals, 3),
+      );
+    } else {
+      geometry.computeVertexNormals();
+    }
+    if (meshData.uvs) {
+      geometry.setAttribute(
+        "uv",
+        new THREE.Float32BufferAttribute(meshData.uvs, 2),
+      );
+    }
+    meshRef.current.geometry = geometry;
+  }, [meshData]);
+
+  return (
+    <PhysicsWrapper
+      physics={physics}
+      damage={damage}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+    >
+      <mesh
+        ref={meshRef}
+        castShadow={castShadow ?? false}
+        receiveShadow={receiveShadow ?? false}
+      >
+        <boxGeometry args={[1, 1, 1]} />
+        <meshStandardMaterial {...buildMaterialProps(material)} />
+      </mesh>
+    </PhysicsWrapper>
+  );
+}

examples/game-engine/components/game/ground-plane.tsx

@@ -0,0 +1,52 @@
+"use client";
+
+import * as THREE from "three";
+import { RigidBody, CuboidCollider } from "@react-three/rapier";
+import { useEditorStore } from "@/lib/store";
+
+interface GroundPlaneProps {
+  position?: [number, number, number] | null;
+  rotation?: [number, number, number] | null;
+  scale?: [number, number, number] | null;
+  material?: {
+    color?: string | null;
+    metalness?: number | null;
+    roughness?: number | null;
+  } | null;
+  size?: number | null;
+}
+
+export function GroundPlane({ position, material, size }: GroundPlaneProps) {
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const s = size ?? 5000;
+  const pos: [number, number, number] = position ?? [0, -0.1, 0];
+
+  const plane = (
+    <mesh rotation={[-Math.PI / 2, 0, 0]} position={pos} receiveShadow>
+      <planeGeometry args={[s, s]} />
+      <meshStandardMaterial
+        color={material?.color ?? "#4CAF50"}
+        metalness={material?.metalness ?? 0}
+        roughness={material?.roughness ?? 0.9}
+        side={THREE.DoubleSide}
+      />
+    </mesh>
+  );
+
+  if (!isPlaying) return plane;
+
+  return (
+    <RigidBody type="fixed" position={pos} colliders={false}>
+      <mesh rotation={[-Math.PI / 2, 0, 0]} receiveShadow>
+        <planeGeometry args={[s, s]} />
+        <meshStandardMaterial
+          color={material?.color ?? "#4CAF50"}
+          metalness={material?.metalness ?? 0}
+          roughness={material?.roughness ?? 0.9}
+          side={THREE.DoubleSide}
+        />
+      </mesh>
+      <CuboidCollider args={[s / 2, 0.01, s / 2]} position={[0, 0, 0]} />
+    </RigidBody>
+  );
+}

examples/game-engine/components/game/media-plane.tsx

@@ -0,0 +1,93 @@
+"use client";
+
+import { useRef, useEffect, useState } from "react";
+import * as THREE from "three";
+
+interface MediaPlaneProps {
+  position?: [number, number, number] | null;
+  rotation?: [number, number, number] | null;
+  scale?: [number, number, number] | null;
+  castShadow?: boolean | null;
+  receiveShadow?: boolean | null;
+  url: string;
+  mediaType: "image" | "video";
+  loop?: boolean | null;
+  autoplay?: boolean | null;
+  muted?: boolean | null;
+  width?: number | null;
+  height?: number | null;
+  objectId?: string | null;
+}
+
+export function MediaPlane({
+  position,
+  rotation,
+  scale,
+  url,
+  mediaType,
+  loop,
+  autoplay,
+  muted,
+  width,
+  height,
+}: MediaPlaneProps) {
+  const meshRef = useRef<THREE.Mesh>(null);
+  const [texture, setTexture] = useState<THREE.Texture | null>(null);
+
+  useEffect(() => {
+    if (!url) return;
+
+    if (mediaType === "video") {
+      const video = document.createElement("video");
+      video.src = url;
+      video.crossOrigin = "anonymous";
+      video.loop = loop ?? false;
+      video.muted = muted ?? true;
+      if (autoplay !== false) video.play();
+
+      const tex = new THREE.VideoTexture(video);
+      tex.colorSpace = THREE.SRGBColorSpace;
+      setTexture(tex);
+
+      return () => {
+        video.pause();
+        video.src = "";
+        tex.dispose();
+      };
+    } else {
+      const loader = new THREE.TextureLoader();
+      loader.load(url, (tex) => {
+        tex.colorSpace = THREE.SRGBColorSpace;
+        setTexture(tex);
+      });
+    }
+  }, [url, mediaType, loop, autoplay, muted]);
+
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+  const w = width ?? 2;
+  const h = height ?? w * 0.75;
+
+  return (
+    <mesh
+      ref={meshRef}
+      position={pos}
+      rotation={rot}
+      scale={scl}
+      castShadow
+      receiveShadow
+    >
+      <planeGeometry args={[w, h]} />
+      {texture ? (
+        <meshBasicMaterial
+          // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+          map={texture as any}
+          side={THREE.DoubleSide}
+        />
+      ) : (
+        <meshStandardMaterial color="#333" side={THREE.DoubleSide} />
+      )}
+    </mesh>
+  );
+}

examples/game-engine/components/game/model-wrapper.tsx

@@ -0,0 +1,159 @@
+"use client";
+
+import { useRef, useEffect, Suspense } from "react";
+import { useGLTF } from "@react-three/drei";
+import {
+  RigidBody,
+  CuboidCollider,
+  BallCollider,
+  CapsuleCollider,
+} from "@react-three/rapier";
+import type * as THREE from "three";
+import { useEditorStore } from "@/lib/store";
+
+interface PhysicsProps {
+  mass?: number | null;
+  isStatic?: boolean | null;
+  restitution?: number | null;
+  friction?: number | null;
+  colliderType?: string | null;
+}
+
+interface DamageProps {
+  amount?: number | null;
+  enabled?: boolean | null;
+}
+
+interface GameModelProps {
+  position?: [number, number, number] | null;
+  rotation?: [number, number, number] | null;
+  scale?: [number, number, number] | null;
+  castShadow?: boolean | null;
+  receiveShadow?: boolean | null;
+  url: string;
+  physics?: PhysicsProps | null;
+  damage?: DamageProps | null;
+  objectId?: string | null;
+}
+
+function ModelInner({
+  url,
+  userData,
+}: {
+  url: string;
+  userData: Record<string, unknown>;
+}) {
+  const groupRef = useRef<THREE.Group>(null);
+  const { scene } = useGLTF(url);
+  const setIsLoading = useEditorStore((s) => s.setIsLoading);
+
+  const model = scene.clone();
+
+  useEffect(() => {
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+    model.traverse((node: any) => {
+      if (node.isMesh) {
+        node.castShadow = true;
+        node.receiveShadow = true;
+      }
+    });
+  }, [model]);
+
+  useEffect(() => {
+    if (groupRef.current) {
+      Object.assign(groupRef.current.userData, userData);
+    }
+  }, [userData]);
+
+  useEffect(() => {
+    const timer = setTimeout(() => setIsLoading(false), 100);
+    return () => clearTimeout(timer);
+  }, [setIsLoading]);
+
+  return (
+    <group ref={groupRef}>
+      <primitive object={model} />
+    </group>
+  );
+}
+
+export function GameModel({
+  position,
+  rotation,
+  scale,
+  url,
+  physics,
+  damage,
+  objectId,
+}: GameModelProps) {
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const takeDamage = useEditorStore((s) => s.takeDamage);
+  const setIsLoading = useEditorStore((s) => s.setIsLoading);
+
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+  const rot: [number, number, number] = rotation ?? [0, 0, 0];
+  const scl: [number, number, number] = scale ?? [1, 1, 1];
+
+  const hasPhysics =
+    isPlaying &&
+    physics &&
+    physics.colliderType &&
+    physics.colliderType !== "none";
+  const hasDamage = damage?.enabled && (damage.amount ?? 0) > 0;
+
+  useEffect(() => {
+    if (url) setIsLoading(true);
+  }, [url, setIsLoading]);
+
+  if (!url) {
+    return (
+      <group position={pos} rotation={rot} scale={scl}>
+        <mesh castShadow receiveShadow>
+          <boxGeometry args={[1, 1, 1]} />
+          <meshStandardMaterial color="#888888" wireframe />
+        </mesh>
+      </group>
+    );
+  }
+
+  const inner = (
+    <Suspense fallback={null}>
+      <ModelInner url={url} userData={{ id: objectId, objectId }} />
+    </Suspense>
+  );
+
+  if (!hasPhysics) {
+    return (
+      <group position={pos} rotation={rot} scale={scl}>
+        {inner}
+      </group>
+    );
+  }
+
+  const collider =
+    physics!.colliderType === "ball" ? (
+      <BallCollider args={[Math.max(scl[0], scl[1], scl[2]) * 0.5]} />
+    ) : physics!.colliderType === "capsule" ? (
+      <CapsuleCollider args={[scl[1] * 0.25, Math.max(scl[0], scl[2]) * 0.5]} />
+    ) : (
+      <CuboidCollider args={[scl[0] * 0.5, scl[1] * 0.5, scl[2] * 0.5]} />
+    );
+
+  return (
+    <RigidBody
+      type={physics!.isStatic ? "fixed" : "dynamic"}
+      position={pos}
+      rotation={rot}
+      mass={physics!.mass ?? 1}
+      restitution={physics!.restitution ?? 0.2}
+      friction={physics!.friction ?? 0.5}
+      colliders={false}
+      onCollisionEnter={
+        hasDamage ? () => takeDamage(damage!.amount!) : undefined
+      }
+    >
+      <group scale={scl}>{inner}</group>
+      {collider}
+    </RigidBody>
+  );
+}

examples/game-engine/components/game/player.tsx

@@ -0,0 +1,529 @@
+"use client";
+
+import { useEffect, useRef, useState, Suspense } from "react";
+import { useFrame, useThree } from "@react-three/fiber";
+import { PointerLockControls, useGLTF } from "@react-three/drei";
+import { RigidBody, CapsuleCollider, useRapier } from "@react-three/rapier";
+import type { RapierRigidBody } from "@react-three/rapier";
+import * as THREE from "three";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+import { touchMoveState } from "@/lib/touch-state";
+import { resetBoneScales } from "@/lib/bone-utils";
+
+interface PlayerProps {
+  position?: [number, number, number] | null;
+  rotation?: [number, number, number] | null;
+  scale?: [number, number, number] | null;
+  objectId?: string | null;
+  isPlayer?: boolean | null;
+}
+
+export function Player({ position }: PlayerProps) {
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const viewMode = useEditorStore((s) => s.viewMode);
+  const health = useEditorStore((s) => s.health);
+  const isPromptOpen = useEditorStore((s) => s.isPromptOpen);
+
+  if (!isPlaying) {
+    const pos = position ?? [0, 0, 0];
+    return (
+      <mesh position={pos as [number, number, number]}>
+        <capsuleGeometry args={[0.3, 0.8, 8, 16]} />
+        <meshStandardMaterial color="#3498db" transparent opacity={0.5} />
+      </mesh>
+    );
+  }
+
+  if (viewMode === "first-person") {
+    return (
+      <FirstPersonController
+        initialPosition={position ?? [0, 0, 0]}
+        health={health}
+        isPromptOpen={isPromptOpen}
+      />
+    );
+  }
+
+  return (
+    <ThirdPersonController
+      initialPosition={position ?? [0, 0, 0]}
+      health={health}
+      isPromptOpen={isPromptOpen}
+    />
+  );
+}
+
+function FirstPersonController({
+  initialPosition,
+  health,
+  isPromptOpen,
+}: {
+  initialPosition: [number, number, number];
+  health: number;
+  isPromptOpen: boolean;
+}) {
+  const { camera } = useThree();
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const controlsRef = useRef<any>(null);
+  const playerRef = useRef<RapierRigidBody>(null);
+  const isMobile = useIsMobile();
+
+  const moveState = useRef({
+    forward: false,
+    backward: false,
+    left: false,
+    right: false,
+    jump: false,
+    sprint: false,
+  });
+
+  const { rapier, world } = useRapier();
+  const playerDirection = useRef(new THREE.Vector3());
+  const isOnGround = useRef(true);
+  const jumpCooldown = useRef(0);
+  const touchYaw = useRef(0);
+  const touchPitch = useRef(0);
+
+  const speed = 5;
+  const jumpForce = 5;
+  const groundCastDist = 0.85;
+  const isGameOver = health <= 0;
+
+  useEffect(() => {
+    if (isMobile) {
+      camera.rotation.order = "YXZ";
+      camera.rotation.set(0, 0, 0);
+      touchYaw.current = 0;
+      touchPitch.current = 0;
+    }
+  }, [isMobile, camera]);
+
+  useEffect(() => {
+    if (isMobile) return;
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (isPromptOpen || isGameOver) return;
+      switch (e.code) {
+        case "KeyW":
+        case "ArrowUp":
+          moveState.current.forward = true;
+          break;
+        case "KeyS":
+        case "ArrowDown":
+          moveState.current.backward = true;
+          break;
+        case "KeyA":
+        case "ArrowLeft":
+          moveState.current.left = true;
+          break;
+        case "KeyD":
+        case "ArrowRight":
+          moveState.current.right = true;
+          break;
+        case "Space":
+          moveState.current.jump = true;
+          break;
+        case "ShiftLeft":
+        case "ShiftRight":
+          moveState.current.sprint = true;
+          break;
+      }
+    };
+    const handleKeyUp = (e: KeyboardEvent) => {
+      switch (e.code) {
+        case "KeyW":
+        case "ArrowUp":
+          moveState.current.forward = false;
+          break;
+        case "KeyS":
+        case "ArrowDown":
+          moveState.current.backward = false;
+          break;
+        case "KeyA":
+        case "ArrowLeft":
+          moveState.current.left = false;
+          break;
+        case "KeyD":
+        case "ArrowRight":
+          moveState.current.right = false;
+          break;
+        case "Space":
+          moveState.current.jump = false;
+          break;
+        case "ShiftLeft":
+        case "ShiftRight":
+          moveState.current.sprint = false;
+          break;
+      }
+    };
+    window.addEventListener("keydown", handleKeyDown);
+    window.addEventListener("keyup", handleKeyUp);
+    return () => {
+      window.removeEventListener("keydown", handleKeyDown);
+      window.removeEventListener("keyup", handleKeyUp);
+    };
+  }, [isPromptOpen, isGameOver, isMobile]);
+
+  useFrame((_, delta) => {
+    if (!playerRef.current || isGameOver) return;
+
+    const body = playerRef.current;
+    const vel = body.linvel();
+
+    let forward: boolean;
+    let backward: boolean;
+    let left: boolean;
+    let right: boolean;
+    let jump: boolean;
+    let sprint: boolean;
+
+    if (isMobile) {
+      forward = touchMoveState.forward > 0.15;
+      backward = touchMoveState.forward < -0.15;
+      left = touchMoveState.right < -0.15;
+      right = touchMoveState.right > 0.15;
+      jump = touchMoveState.jump;
+      sprint = touchMoveState.sprint;
+
+      if (touchMoveState.lookDeltaX !== 0 || touchMoveState.lookDeltaY !== 0) {
+        touchYaw.current -= touchMoveState.lookDeltaX;
+        touchPitch.current -= touchMoveState.lookDeltaY;
+        touchPitch.current = Math.max(
+          -Math.PI / 2 + 0.01,
+          Math.min(Math.PI / 2 - 0.01, touchPitch.current),
+        );
+        camera.rotation.order = "YXZ";
+        camera.rotation.y = touchYaw.current;
+        camera.rotation.x = touchPitch.current;
+        touchMoveState.lookDeltaX = 0;
+        touchMoveState.lookDeltaY = 0;
+      }
+    } else {
+      ({ forward, backward, left, right, jump, sprint } = moveState.current);
+    }
+
+    playerDirection.current.set(0, 0, 0);
+
+    const frontVector = new THREE.Vector3(
+      0,
+      0,
+      (backward ? 1 : 0) - (forward ? 1 : 0),
+    );
+    const sideVector = new THREE.Vector3(
+      (right ? 1 : 0) - (left ? 1 : 0),
+      0,
+      0,
+    );
+    playerDirection.current
+      .addVectors(frontVector, sideVector)
+      .normalize()
+      .multiplyScalar(speed * (sprint ? 1.8 : 1))
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+      .applyEuler(camera.rotation as any);
+
+    body.setLinvel(
+      { x: playerDirection.current.x, y: vel.y, z: playerDirection.current.z },
+      true,
+    );
+
+    if (jump && isOnGround.current && jumpCooldown.current <= 0) {
+      body.setLinvel({ x: vel.x, y: jumpForce, z: vel.z }, true);
+      isOnGround.current = false;
+      jumpCooldown.current = 0.3;
+    }
+
+    if (jumpCooldown.current > 0) jumpCooldown.current -= delta;
+
+    const pos = body.translation();
+    const ray = new rapier.Ray(
+      { x: pos.x, y: pos.y, z: pos.z },
+      { x: 0, y: -1, z: 0 },
+    );
+    const hit = world.castRay(ray, groundCastDist, false);
+    isOnGround.current = hit !== null;
+
+    camera.position.set(pos.x, pos.y + 0.85, pos.z);
+  });
+
+  return (
+    <>
+      {!isMobile && <PointerLockControls ref={controlsRef} />}
+      <RigidBody
+        ref={playerRef}
+        position={[
+          initialPosition[0],
+          initialPosition[1] + 2,
+          initialPosition[2],
+        ]}
+        enabledRotations={[false, false, false]}
+        mass={1}
+        linearDamping={0.5}
+        type="dynamic"
+        colliders={false}
+        lockRotations
+      >
+        <CapsuleCollider args={[0.35, 0.3]} />
+      </RigidBody>
+    </>
+  );
+}
+
+function AnimatedCharacterModelInner({
+  characterRef,
+  isMoving,
+}: {
+  characterRef: React.RefObject<THREE.Group | null>;
+  isMoving: boolean;
+}) {
+  const characterGltf = useGLTF("/models/bot.glb");
+  const walkGltf = useGLTF("/models/walking.glb");
+  const idleGltf = useGLTF("/models/idle.glb");
+
+  const mixerRef = useRef<THREE.AnimationMixer | null>(null);
+  const actionsRef = useRef<Record<string, THREE.AnimationAction>>({});
+  const [ready, setReady] = useState(false);
+
+  useEffect(() => {
+    if (!characterRef.current || !characterGltf || !walkGltf || !idleGltf)
+      return;
+
+    try {
+      characterGltf.scene.scale.set(1, 1, 1);
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+      resetBoneScales(characterGltf.scene as any);
+
+      characterRef.current.clear();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch between drei and three
+      characterRef.current.add(characterGltf.scene.clone() as any);
+
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+      const mixer = new THREE.AnimationMixer(characterRef.current as any);
+      mixerRef.current = mixer;
+
+      if (idleGltf.animations[0] && walkGltf.animations[0]) {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+        const idleAction = mixer.clipAction(idleGltf.animations[0] as any);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any -- @types/three version mismatch
+        const walkAction = mixer.clipAction(walkGltf.animations[0] as any);
+        actionsRef.current = { idle: idleAction, walk: walkAction };
+        idleAction.play();
+        setReady(true);
+      }
+    } catch {
+      // Model loading failed
+    }
+  }, [characterRef, characterGltf, walkGltf, idleGltf]);
+
+  useEffect(() => {
+    if (!ready) return;
+    const { idle, walk } = actionsRef.current;
+    if (!idle || !walk) return;
+
+    if (isMoving) {
+      idle.fadeOut(0.2);
+      walk.reset().fadeIn(0.2).play();
+    } else {
+      walk.fadeOut(0.2);
+      idle.reset().fadeIn(0.2).play();
+    }
+  }, [isMoving, ready]);
+
+  useFrame((_, delta) => {
+    mixerRef.current?.update(delta);
+  });
+
+  return null;
+}
+
+function ThirdPersonController({
+  initialPosition,
+  health,
+  isPromptOpen,
+}: {
+  initialPosition: [number, number, number];
+  health: number;
+  isPromptOpen: boolean;
+}) {
+  const { camera } = useThree();
+  const playerRef = useRef<RapierRigidBody>(null);
+  const characterRef = useRef<THREE.Group>(null);
+  const cameraAngle = useRef(0);
+  const [isMoving, setIsMoving] = useState(false);
+  const isMobile = useIsMobile();
+
+  const moveState = useRef({
+    forward: false,
+    backward: false,
+    left: false,
+    right: false,
+    sprint: false,
+  });
+
+  const speed = 5;
+  const isGameOver = health <= 0;
+
+  useEffect(() => {
+    if (isMobile) {
+      cameraAngle.current = 0;
+    }
+  }, [isMobile]);
+
+  useEffect(() => {
+    if (isMobile) return;
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (isPromptOpen || isGameOver) return;
+      switch (e.code) {
+        case "KeyW":
+        case "ArrowUp":
+          moveState.current.forward = true;
+          break;
+        case "KeyS":
+        case "ArrowDown":
+          moveState.current.backward = true;
+          break;
+        case "KeyA":
+        case "ArrowLeft":
+          moveState.current.left = true;
+          break;
+        case "KeyD":
+        case "ArrowRight":
+          moveState.current.right = true;
+          break;
+        case "ShiftLeft":
+        case "ShiftRight":
+          moveState.current.sprint = true;
+          break;
+      }
+    };
+    const handleKeyUp = (e: KeyboardEvent) => {
+      switch (e.code) {
+        case "KeyW":
+        case "ArrowUp":
+          moveState.current.forward = false;
+          break;
+        case "KeyS":
+        case "ArrowDown":
+          moveState.current.backward = false;
+          break;
+        case "KeyA":
+        case "ArrowLeft":
+          moveState.current.left = false;
+          break;
+        case "KeyD":
+        case "ArrowRight":
+          moveState.current.right = false;
+          break;
+        case "ShiftLeft":
+        case "ShiftRight":
+          moveState.current.sprint = false;
+          break;
+      }
+    };
+    const handleMouseMove = (e: MouseEvent) => {
+      cameraAngle.current -= e.movementX * 0.003;
+    };
+    window.addEventListener("keydown", handleKeyDown);
+    window.addEventListener("keyup", handleKeyUp);
+    window.addEventListener("mousemove", handleMouseMove);
+    return () => {
+      window.removeEventListener("keydown", handleKeyDown);
+      window.removeEventListener("keyup", handleKeyUp);
+      window.removeEventListener("mousemove", handleMouseMove);
+    };
+  }, [isPromptOpen, isGameOver, isMobile]);
+
+  useFrame(() => {
+    if (!playerRef.current || isGameOver) return;
+
+    const body = playerRef.current;
+    const vel = body.linvel();
+
+    let forward: boolean;
+    let backward: boolean;
+    let left: boolean;
+    let right: boolean;
+    let sprint: boolean;
+
+    if (isMobile) {
+      forward = touchMoveState.forward > 0.15;
+      backward = touchMoveState.forward < -0.15;
+      left = touchMoveState.right < -0.15;
+      right = touchMoveState.right > 0.15;
+      sprint = touchMoveState.sprint;
+
+      if (touchMoveState.lookDeltaX !== 0) {
+        cameraAngle.current -= touchMoveState.lookDeltaX;
+        touchMoveState.lookDeltaX = 0;
+        touchMoveState.lookDeltaY = 0;
+      }
+    } else {
+      ({ forward, backward, left, right, sprint } = moveState.current);
+    }
+
+    const dir = new THREE.Vector3(0, 0, 0);
+    if (forward) dir.z -= 1;
+    if (backward) dir.z += 1;
+    if (left) dir.x -= 1;
+    if (right) dir.x += 1;
+    dir.normalize().multiplyScalar(speed * (sprint ? 1.8 : 1));
+    dir.applyAxisAngle(new THREE.Vector3(0, 1, 0), cameraAngle.current);
+
+    body.setLinvel({ x: dir.x, y: vel.y, z: dir.z }, true);
+
+    const moving = dir.length() > 0.1;
+    setIsMoving(moving);
+
+    const pos = body.translation();
+
+    if (characterRef.current) {
+      characterRef.current.position.set(pos.x, pos.y, pos.z);
+      if (moving) {
+        const targetAngle = Math.atan2(dir.x, dir.z);
+        characterRef.current.rotation.y = targetAngle;
+      }
+    }
+
+    const camDist = 6;
+    const camHeight = 3;
+    camera.position.set(
+      pos.x + Math.sin(cameraAngle.current) * camDist,
+      pos.y + camHeight,
+      pos.z + Math.cos(cameraAngle.current) * camDist,
+    );
+    camera.lookAt(pos.x, pos.y + 1, pos.z);
+  });
+
+  return (
+    <>
+      <RigidBody
+        ref={playerRef}
+        position={[
+          initialPosition[0],
+          initialPosition[1] + 2,
+          initialPosition[2],
+        ]}
+        enabledRotations={[false, false, false]}
+        mass={1}
+        linearDamping={0.5}
+        type="dynamic"
+        colliders={false}
+        lockRotations
+      >
+        <CapsuleCollider args={[0.35, 0.3]} />
+      </RigidBody>
+      <group ref={characterRef} position={initialPosition}>
+        <Suspense fallback={null}>
+          <AnimatedCharacterModelInner
+            characterRef={characterRef}
+            isMoving={isMoving}
+          />
+        </Suspense>
+        {/* Fallback capsule mesh visible until models load */}
+        <mesh castShadow>
+          <capsuleGeometry args={[0.3, 0.8, 8, 16]} />
+          <meshStandardMaterial color="#3498db" />
+        </mesh>
+      </group>
+    </>
+  );
+}

examples/game-engine/components/game/sound-emitter.tsx

@@ -0,0 +1,80 @@
+"use client";
+
+import { useRef, useEffect } from "react";
+import { useThree } from "@react-three/fiber";
+import * as THREE from "three";
+import { useEditorStore } from "@/lib/store";
+
+interface SoundEmitterProps {
+  position?: [number, number, number] | null;
+  rotation?: [number, number, number] | null;
+  scale?: [number, number, number] | null;
+  url: string;
+  loop?: boolean | null;
+  volume?: number | null;
+  positional?: boolean | null;
+  distance?: number | null;
+  objectId?: string | null;
+}
+
+export function SoundEmitter({
+  position,
+  url,
+  loop,
+  volume,
+  positional,
+  distance,
+}: SoundEmitterProps) {
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const { camera } = useThree();
+  const listenerRef = useRef<THREE.AudioListener | null>(null);
+  const soundRef = useRef<THREE.PositionalAudio | THREE.Audio | null>(null);
+  const pos: [number, number, number] = position ?? [0, 0, 0];
+
+  useEffect(() => {
+    if (!isPlaying || !url) return;
+
+    const listener = new THREE.AudioListener();
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    camera.add(listener as any);
+    listenerRef.current = listener;
+
+    const loader = new THREE.AudioLoader();
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    let audio: any;
+
+    if (positional !== false) {
+      audio = new THREE.PositionalAudio(listener);
+      audio.setRefDistance(distance ?? 10);
+    } else {
+      audio = new THREE.Audio(listener);
+    }
+
+    loader.load(url, (buffer) => {
+      audio.setBuffer(buffer);
+      audio.setLoop(loop ?? false);
+      audio.setVolume(volume ?? 1);
+      audio.play();
+    });
+
+    soundRef.current = audio;
+
+    return () => {
+      if (soundRef.current?.isPlaying) soundRef.current.stop();
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      camera.remove(listener as any);
+    };
+  }, [isPlaying, url, loop, volume, positional, distance, camera]);
+
+  // Edit mode indicator
+  if (!isPlaying) {
+    return (
+      <mesh position={pos}>
+        <sphereGeometry args={[0.2, 8, 8]} />
+        <meshStandardMaterial color="#9b59b6" wireframe />
+      </mesh>
+    );
+  }
+
+  return <group position={pos} />;
+}

examples/game-engine/components/hud/character-dialog.tsx

@@ -0,0 +1,228 @@
+"use client";
+
+import { useState, useEffect, useCallback, useRef } from "react";
+import { X, Volume2, VolumeX } from "lucide-react";
+import { useIsMobile } from "@/lib/use-mobile";
+
+interface DialogMessage {
+  text: string;
+  audioUrl?: string;
+}
+
+export function CharacterDialog() {
+  const [isOpen, setIsOpen] = useState(false);
+  const [messages, setMessages] = useState<DialogMessage[]>([]);
+  const [currentIndex, setCurrentIndex] = useState(0);
+  const [characterRole, setCharacterRole] = useState("");
+  const [isLoading, setIsLoading] = useState(false);
+  const [isMuted, setIsMuted] = useState(false);
+  const audioRef = useRef<HTMLAudioElement | null>(null);
+  const isMobile = useIsMobile();
+
+  useEffect(() => {
+    const audio = new Audio();
+    audioRef.current = audio;
+    return () => {
+      audio.pause();
+      audio.src = "";
+    };
+  }, []);
+
+  useEffect(() => {
+    const handleInteract = (e: Event) => {
+      const detail = (e as CustomEvent).detail as {
+        id?: string;
+        role?: string;
+        messages?: DialogMessage[];
+      };
+
+      setCharacterRole(detail?.role || "NPC");
+      setCurrentIndex(0);
+      setIsOpen(true);
+      window.dispatchEvent(new CustomEvent("dialog-open"));
+
+      if (detail?.messages && detail.messages.length > 0) {
+        setMessages(detail.messages);
+        setIsLoading(false);
+      } else {
+        setIsLoading(true);
+        fetchCharacterResponses(detail?.role || "villager").then(
+          (responses) => {
+            setMessages(responses);
+            setIsLoading(false);
+          },
+        );
+      }
+    };
+
+    window.addEventListener("character-interact", handleInteract);
+    return () =>
+      window.removeEventListener("character-interact", handleInteract);
+  }, []);
+
+  useEffect(() => {
+    if (!isLoading && messages.length > 0 && !isMuted && audioRef.current) {
+      const current = messages[currentIndex];
+      if (current?.audioUrl) {
+        audioRef.current.src = current.audioUrl;
+        audioRef.current.volume = 1.0;
+        audioRef.current.play().catch(() => {});
+      }
+    }
+  }, [currentIndex, messages, isLoading, isMuted]);
+
+  const handleClose = useCallback(() => {
+    setIsOpen(false);
+    setMessages([]);
+    setCurrentIndex(0);
+    if (audioRef.current) audioRef.current.pause();
+    window.dispatchEvent(new CustomEvent("dialog-close"));
+  }, []);
+
+  const handleNext = useCallback(() => {
+    if (audioRef.current) audioRef.current.pause();
+    if (currentIndex < messages.length - 1) {
+      setCurrentIndex((i) => i + 1);
+    } else {
+      handleClose();
+    }
+  }, [currentIndex, messages.length, handleClose]);
+
+  useEffect(() => {
+    if (!isOpen) return;
+    const handleKey = (e: KeyboardEvent) => {
+      if (e.key === "Enter") {
+        handleNext();
+      } else if (e.key === "Escape") {
+        handleClose();
+      }
+    };
+    window.addEventListener("keydown", handleKey);
+    return () => window.removeEventListener("keydown", handleKey);
+  }, [isOpen, handleNext, handleClose]);
+
+  const toggleMute = () => {
+    setIsMuted(!isMuted);
+    if (audioRef.current) {
+      if (!isMuted) {
+        audioRef.current.pause();
+      } else if (messages[currentIndex]?.audioUrl) {
+        audioRef.current.src = messages[currentIndex].audioUrl!;
+        audioRef.current.volume = 1.0;
+        audioRef.current.play().catch(() => {});
+      }
+    }
+  };
+
+  if (!isOpen) return null;
+
+  if (isLoading) {
+    return (
+      <div className="absolute bottom-20 left-1/2 -translate-x-1/2 z-20 w-[480px] max-w-[90vw]">
+        <div className="bg-[#111]/95 border border-[#333] rounded-lg p-4 backdrop-blur-sm">
+          <div className="flex items-start justify-between mb-2">
+            <span className="text-[10px] text-[#666] uppercase tracking-wider">
+              {characterRole}
+            </span>
+            <button
+              onClick={handleClose}
+              className="p-1.5 text-[#666] hover:text-white active:text-white"
+            >
+              <X size={14} />
+            </button>
+          </div>
+          <div className="animate-pulse h-4 bg-[#222] rounded w-3/4 mb-2" />
+          <div className="animate-pulse h-4 bg-[#222] rounded w-1/2" />
+          <p className="text-[9px] text-[#555] mt-3">Loading...</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (messages.length === 0) return null;
+
+  const current = messages[currentIndex];
+  const isLast = currentIndex >= messages.length - 1;
+
+  return (
+    <div className="absolute bottom-20 left-1/2 -translate-x-1/2 z-20 w-[480px] max-w-[90vw]">
+      <div className="bg-[#111]/95 border border-[#333] rounded-lg p-4 backdrop-blur-sm">
+        <div className="flex items-start justify-between mb-2">
+          <span className="text-[10px] text-[#666] uppercase tracking-wider">
+            {characterRole || "NPC"}
+          </span>
+          <div className="flex items-center gap-2">
+            <button
+              onClick={toggleMute}
+              className="p-1.5 text-[#666] hover:text-white active:text-white"
+              title={isMuted ? "Unmute" : "Mute"}
+            >
+              {isMuted ? <VolumeX size={14} /> : <Volume2 size={14} />}
+            </button>
+            <button
+              onClick={handleClose}
+              className="p-1.5 text-[#666] hover:text-white active:text-white"
+            >
+              <X size={14} />
+            </button>
+          </div>
+        </div>
+        <p className="text-sm text-[#ddd] leading-relaxed">{current?.text}</p>
+        <div className="mt-3 flex items-center justify-between">
+          <span className="text-[9px] text-[#555]">
+            {currentIndex + 1} / {messages.length}
+          </span>
+          {isMobile ? (
+            <div className="flex items-center gap-2">
+              <button
+                onClick={handleClose}
+                className="px-3 py-1.5 text-xs text-[#888] bg-white/5 rounded active:bg-white/15"
+              >
+                Close
+              </button>
+              {!isLast && (
+                <button
+                  onClick={handleNext}
+                  className="px-3 py-1.5 text-xs text-white bg-white/10 rounded active:bg-white/25"
+                >
+                  Next
+                </button>
+              )}
+            </div>
+          ) : (
+            <span className="text-[9px] text-[#555]">
+              {isLast
+                ? "Press Enter or Esc to close"
+                : "Press Enter to continue"}
+            </span>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
+
+async function fetchCharacterResponses(
+  role: string,
+): Promise<{ text: string; audioUrl?: string }[]> {
+  try {
+    const res = await fetch("/api/character-responses", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ role }),
+    });
+    if (!res.ok) throw new Error("Failed to fetch responses");
+    const data = await res.json();
+    return (
+      data.messages || [
+        { text: "Hello there! How can I help you?" },
+        { text: "It's a beautiful day, isn't it?" },
+      ]
+    );
+  } catch {
+    return [
+      { text: "Hello there! How can I help you?" },
+      { text: "It's a beautiful day, isn't it?" },
+    ];
+  }
+}

examples/game-engine/components/hud/damage-effect.tsx

@@ -0,0 +1,24 @@
+"use client";
+
+import { useState, useEffect } from "react";
+
+interface DamageEffectProps {
+  lastDamageTime: number | null;
+}
+
+export function DamageEffect({ lastDamageTime }: DamageEffectProps) {
+  const [show, setShow] = useState(false);
+
+  useEffect(() => {
+    if (!lastDamageTime) return;
+    setShow(true);
+    const timer = setTimeout(() => setShow(false), 400);
+    return () => clearTimeout(timer);
+  }, [lastDamageTime]);
+
+  if (!show) return null;
+
+  return (
+    <div className="absolute inset-0 pointer-events-none z-20 animate-screen-flash bg-red-600/30 rounded-none" />
+  );
+}

examples/game-engine/components/hud/damage-sound.tsx

@@ -0,0 +1,46 @@
+"use client";
+
+import { useEffect, useRef, useState } from "react";
+import { useEditorStore } from "@/lib/store";
+
+const DAMAGE_SOUND_URL =
+  "https://hebbkx1anhila5yf.public.blob.vercel-storage.com/hit-OaUo19QcLdyFfqy5SMfEWyAF3ZgyxR.mp3";
+
+export function DamageSound() {
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const lastDamageTime = useEditorStore((s) => s.lastDamageTime);
+  const health = useEditorStore((s) => s.health);
+  const audioRef = useRef<HTMLAudioElement | null>(null);
+  const lastPlayedRef = useRef<number>(0);
+  const [loaded, setLoaded] = useState(false);
+
+  useEffect(() => {
+    const audio = new Audio();
+    audio.src = DAMAGE_SOUND_URL;
+    audio.preload = "auto";
+    audio.addEventListener("canplaythrough", () => setLoaded(true));
+    audio.addEventListener("error", () => setLoaded(false));
+    audioRef.current = audio;
+
+    return () => {
+      audio.pause();
+      audio.src = "";
+    };
+  }, []);
+
+  useEffect(() => {
+    if (!isPlaying || !lastDamageTime || health <= 0 || !loaded) return;
+
+    const now = Date.now();
+    if (now - lastPlayedRef.current < 300) return;
+    lastPlayedRef.current = now;
+
+    if (audioRef.current) {
+      audioRef.current.currentTime = 0;
+      audioRef.current.volume = 0.5;
+      audioRef.current.play().catch(() => {});
+    }
+  }, [isPlaying, lastDamageTime, health, loaded]);
+
+  return null;
+}

examples/game-engine/components/hud/death-sound.tsx

@@ -0,0 +1,46 @@
+"use client";
+
+import { useEffect, useRef, useState } from "react";
+import { useEditorStore } from "@/lib/store";
+
+const DEATH_SOUND_URL =
+  "https://hebbkx1anhila5yf.public.blob.vercel-storage.com/death-y5RAJQHhGgzagKglqKEYKzMFc84QcR.mp3";
+
+export function DeathSound() {
+  const health = useEditorStore((s) => s.health);
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const audioRef = useRef<HTMLAudioElement | null>(null);
+  const [prevHealth, setPrevHealth] = useState(100);
+  const [loaded, setLoaded] = useState(false);
+
+  useEffect(() => {
+    const audio = new Audio();
+    audio.src = DEATH_SOUND_URL;
+    audio.preload = "auto";
+    audio.addEventListener("canplaythrough", () => setLoaded(true));
+    audio.addEventListener("error", () => setLoaded(false));
+    audioRef.current = audio;
+
+    return () => {
+      audio.pause();
+      audio.src = "";
+    };
+  }, []);
+
+  useEffect(() => {
+    if (
+      isPlaying &&
+      prevHealth > 0 &&
+      health <= 0 &&
+      audioRef.current &&
+      loaded
+    ) {
+      audioRef.current.currentTime = 0;
+      audioRef.current.volume = 0.7;
+      audioRef.current.play().catch(() => {});
+    }
+    setPrevHealth(health);
+  }, [health, isPlaying, prevHealth, loaded]);
+
+  return null;
+}

examples/game-engine/components/hud/game-over.tsx

@@ -0,0 +1,51 @@
+"use client";
+
+import { useEditorStore } from "@/lib/store";
+
+export function GameOverScreen() {
+  const setIsPlaying = useEditorStore((s) => s.setIsPlaying);
+  const setHealth = useEditorStore((s) => s.setHealth);
+  const setShield = useEditorStore((s) => s.setShield);
+  const maxHealth = useEditorStore((s) => s.maxHealth);
+  const maxShield = useEditorStore((s) => s.maxShield);
+
+  const handleRestart = () => {
+    setHealth(maxHealth);
+    setShield(maxShield);
+    setIsPlaying(false);
+    setTimeout(() => setIsPlaying(true), 100);
+  };
+
+  const handleExit = () => {
+    setHealth(maxHealth);
+    setShield(maxShield);
+    setIsPlaying(false);
+  };
+
+  return (
+    <div className="absolute inset-0 z-30 flex items-center justify-center bg-black/80 animate-fade-in">
+      <div className="text-center px-4">
+        <h1 className="text-3xl sm:text-5xl font-bold text-red-500 mb-2">
+          GAME OVER
+        </h1>
+        <p className="text-[#888] mb-8 text-sm sm:text-base">
+          You have been defeated
+        </p>
+        <div className="flex gap-3 justify-center">
+          <button
+            onClick={handleRestart}
+            className="px-6 py-2.5 sm:py-2 bg-white/10 hover:bg-white/20 active:bg-white/30 text-white rounded-lg text-sm transition-colors min-w-[100px]"
+          >
+            Restart
+          </button>
+          <button
+            onClick={handleExit}
+            className="px-6 py-2.5 sm:py-2 bg-white/5 hover:bg-white/10 active:bg-white/20 text-[#888] rounded-lg text-sm transition-colors min-w-[100px]"
+          >
+            Exit
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}

examples/game-engine/components/hud/health-bar.tsx

@@ -0,0 +1,58 @@
+"use client";
+
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+
+export function HealthBar() {
+  const health = useEditorStore((s) => s.health);
+  const shield = useEditorStore((s) => s.shield);
+  const maxHealth = useEditorStore((s) => s.maxHealth);
+  const maxShield = useEditorStore((s) => s.maxShield);
+  const isMobile = useIsMobile();
+
+  const healthPct = (health / maxHealth) * 100;
+  const shieldPct = (shield / maxShield) * 100;
+
+  return (
+    <div
+      className={`absolute ${isMobile ? "top-14 left-3" : "bottom-4 left-4"} z-10 flex flex-col gap-1.5 pointer-events-none`}
+    >
+      {/* Shield bar */}
+      <div className="flex items-center gap-2">
+        <div className="text-[10px] text-blue-400 w-5 text-right font-mono">
+          {Math.round(shield)}
+        </div>
+        <div
+          className={`${isMobile ? "w-28" : "w-40"} h-2 bg-[#1a1a1a] rounded-full overflow-hidden`}
+        >
+          <div
+            className="h-full bg-gradient-to-r from-blue-600 to-blue-400 transition-all duration-300"
+            style={{ width: `${shieldPct}%` }}
+          />
+        </div>
+      </div>
+      {/* Health bar */}
+      <div className="flex items-center gap-2">
+        <div
+          className={`text-[10px] w-5 text-right font-mono ${
+            health < 30 ? "text-red-400 animate-pulse-low" : "text-green-400"
+          }`}
+        >
+          {Math.round(health)}
+        </div>
+        <div
+          className={`${isMobile ? "w-28" : "w-40"} h-2 bg-[#1a1a1a] rounded-full overflow-hidden`}
+        >
+          <div
+            className={`h-full transition-all duration-300 ${
+              health < 30
+                ? "bg-gradient-to-r from-red-600 to-red-400 animate-pulse-low"
+                : "bg-gradient-to-r from-green-600 to-green-400"
+            }`}
+            style={{ width: `${healthPct}%` }}
+          />
+        </div>
+      </div>
+    </div>
+  );
+}

examples/game-engine/components/hud/in-game-prompt.tsx

@@ -0,0 +1,284 @@
+"use client";
+
+import type React from "react";
+import { useState, useEffect, useRef } from "react";
+import { ArrowUp, Loader2, MessageSquare } from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+import type {
+  ObjectType,
+  TransformMode,
+  SceneObject,
+  Material,
+  Physics,
+  Damage,
+} from "@/lib/types";
+
+export function InGamePrompt() {
+  const [isOpen, setIsOpen] = useState(false);
+  const [prompt, setPrompt] = useState("");
+  const [isProcessing, setIsProcessing] = useState(false);
+  const [previousPrompts, setPreviousPrompts] = useState<string[]>([]);
+  const textareaRef = useRef<HTMLTextAreaElement>(null);
+  const isMobile = useIsMobile();
+
+  const {
+    addObject,
+    scenes,
+    activeSceneId,
+    updateObjectTransform,
+    updateObjectMaterial,
+    updateObjectPhysics,
+    updateDamage,
+    selectObject,
+    setTransformMode,
+    createCustomObject,
+    isPlaying,
+    setIsPromptOpen,
+  } = useEditorStore();
+
+  const activeScene =
+    scenes.find((scene) => scene.id === activeSceneId) || scenes[0];
+  const objects = activeScene ? activeScene.objects : [];
+
+  const processAction = (action: { function: string; args: unknown[] }) => {
+    try {
+      switch (action.function) {
+        case "addObject":
+          addObject(action.args[0] as ObjectType);
+          break;
+        case "createCustomObject":
+          createCustomObject(
+            action.args[0] as ObjectType,
+            action.args[1] as Partial<SceneObject>,
+          );
+          break;
+        case "updateObjectTransform":
+          updateObjectTransform(
+            action.args[0] as string,
+            action.args[1] as Partial<
+              Pick<SceneObject, "position" | "rotation" | "scale">
+            >,
+          );
+          break;
+        case "updateObjectMaterial":
+          updateObjectMaterial(
+            action.args[0] as string,
+            action.args[1] as Partial<Material>,
+          );
+          break;
+        case "updateObjectPhysics":
+          updateObjectPhysics(
+            action.args[0] as string,
+            action.args[1] as Partial<Physics>,
+          );
+          break;
+        case "updateDamage":
+          updateDamage(
+            action.args[0] as string,
+            action.args[1] as Partial<Damage>,
+          );
+          break;
+        case "selectObject":
+          selectObject(action.args[0] as string);
+          break;
+        case "setTransformMode":
+          setTransformMode(action.args[0] as TransformMode);
+          break;
+      }
+    } catch (error) {
+      console.error("Error processing action:", error, action);
+    }
+  };
+
+  const handleSubmit = async (e?: React.FormEvent) => {
+    if (e) e.preventDefault();
+    if (!prompt.trim() || isProcessing) return;
+
+    setIsProcessing(true);
+    const currentPrompt = prompt;
+    setPreviousPrompts((prev) => [...prev.slice(-4), currentPrompt]);
+    setIsOpen(false);
+    setIsPromptOpen(false);
+
+    try {
+      const response = await fetch("/api/ai-game", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({
+          prompt: currentPrompt,
+          objects,
+          previousPrompts,
+        }),
+      });
+
+      if (!response.ok || !response.body) {
+        throw new Error("Failed to get AI response");
+      }
+
+      const reader = response.body.getReader();
+      const decoder = new TextDecoder();
+      let buffer = "";
+
+      while (true) {
+        const { done, value } = await reader.read();
+        if (done) break;
+
+        const chunk = decoder.decode(value, { stream: true });
+        buffer += chunk;
+
+        let startIndex = 0;
+        while (true) {
+          const openBrace = buffer.indexOf("{", startIndex);
+          if (openBrace === -1) break;
+
+          let depth = 0;
+          let closeBrace = -1;
+
+          for (let i = openBrace; i < buffer.length; i++) {
+            if (buffer[i] === "{") depth++;
+            else if (buffer[i] === "}") {
+              depth--;
+              if (depth === 0) {
+                closeBrace = i;
+                break;
+              }
+            }
+          }
+
+          if (closeBrace === -1) {
+            startIndex = openBrace + 1;
+            break;
+          }
+
+          const jsonStr = buffer.substring(openBrace, closeBrace + 1);
+
+          try {
+            const jsonObj = JSON.parse(jsonStr);
+            if (
+              jsonObj &&
+              typeof jsonObj.function === "string" &&
+              Array.isArray(jsonObj.args)
+            ) {
+              processAction(jsonObj);
+            }
+            buffer =
+              buffer.substring(0, openBrace) + buffer.substring(closeBrace + 1);
+            startIndex = 0;
+          } catch {
+            startIndex = openBrace + 1;
+          }
+        }
+      }
+    } catch (error) {
+      console.error("Error processing AI prompt:", error);
+    } finally {
+      setIsProcessing(false);
+      setPrompt("");
+    }
+  };
+
+  useEffect(() => {
+    if (!isPlaying) {
+      setIsOpen(false);
+      setIsPromptOpen(false);
+      return;
+    }
+
+    if (isMobile) return;
+
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if ((e.metaKey || e.ctrlKey) && e.key === "/") {
+        e.preventDefault();
+        const newIsOpen = !isOpen;
+        setIsOpen(newIsOpen);
+        setIsPromptOpen(newIsOpen);
+      }
+    };
+
+    window.addEventListener("keydown", handleKeyDown);
+    return () => window.removeEventListener("keydown", handleKeyDown);
+  }, [isPlaying, isOpen, setIsPromptOpen, isMobile]);
+
+  useEffect(() => {
+    if (isOpen && textareaRef.current) {
+      setTimeout(() => textareaRef.current?.focus(), 100);
+    }
+  }, [isOpen]);
+
+  const handleKeyDown = (e: React.KeyboardEvent<HTMLTextAreaElement>) => {
+    if (e.key === "Enter" && !e.shiftKey) {
+      e.preventDefault();
+      handleSubmit();
+    }
+  };
+
+  const handleTextareaChange = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
+    setPrompt(e.target.value);
+    e.target.style.height = "auto";
+    e.target.style.height = `${e.target.scrollHeight}px`;
+  };
+
+  if (!isPlaying) return null;
+
+  if (!isOpen) {
+    if (isMobile) {
+      return (
+        <button
+          onClick={() => {
+            setIsOpen(true);
+            setIsPromptOpen(true);
+          }}
+          className="absolute top-14 right-3 z-30 w-11 h-11 flex items-center justify-center rounded-full bg-black/40 backdrop-blur-sm text-white/70 active:bg-white/20 border border-white/10"
+        >
+          <MessageSquare size={18} />
+        </button>
+      );
+    }
+    return null;
+  }
+
+  return (
+    <div
+      className={`absolute ${isMobile ? "top-14 left-2 right-2 bottom-auto" : "top-[50px] left-0 right-0 bottom-0 flex items-center justify-center"} z-40 animate-fade-in`}
+    >
+      <div className="flex items-center justify-center">
+        <div
+          className={`flex items-center gap-2 bg-black/70 backdrop-blur-md border border-white/20 ${isMobile ? "rounded-xl w-full" : "rounded-full"} shadow-lg overflow-hidden ${isMobile ? "" : "max-w-[600px]"}`}
+        >
+          <div className={isMobile ? "pl-3" : "pl-5"}>
+            <MessageSquare className="h-5 w-5 text-white/70" />
+          </div>
+          <form
+            onSubmit={handleSubmit}
+            className="flex items-center flex-1 min-w-0"
+          >
+            <textarea
+              ref={textareaRef}
+              value={prompt}
+              onChange={handleTextareaChange}
+              onKeyDown={handleKeyDown}
+              placeholder="Describe what to add or change..."
+              className={`bg-transparent border-none px-3 py-4 ${isMobile ? "flex-1 min-w-0 text-base" : "w-[400px] text-sm"} text-white placeholder-gray-400 focus:outline-none resize-none overflow-hidden min-h-[44px] max-h-[200px]`}
+              rows={1}
+              style={{ height: "auto" }}
+            />
+            <div className="flex items-center gap-1 mr-3">
+              <button
+                type="submit"
+                className="bg-white/15 text-white p-2 rounded-full hover:bg-white/25 active:bg-white/35 transition-colors disabled:opacity-30"
+                disabled={!prompt.trim() || isProcessing}
+              >
+                {isProcessing ? (
+                  <Loader2 className="h-5 w-5 animate-spin" />
+                ) : (
+                  <ArrowUp className="h-5 w-5" />
+                )}
+              </button>
+            </div>
+          </form>
+        </div>
+      </div>
+    </div>
+  );
+}

examples/game-engine/components/hud/interaction-prompt.tsx

@@ -0,0 +1,53 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { useEditorStore } from "@/lib/store";
+import { useIsMobile } from "@/lib/use-mobile";
+
+export function InteractionPrompt() {
+  const [showPrompt, setShowPrompt] = useState(false);
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const isMobile = useIsMobile();
+
+  useEffect(() => {
+    if (!isPlaying) {
+      setShowPrompt(false);
+      return;
+    }
+
+    const handleNearby = () => setShowPrompt(true);
+    const handleFar = () => setShowPrompt(false);
+    const handleDialogOpen = () => setShowPrompt(false);
+
+    window.addEventListener("character-nearby", handleNearby);
+    window.addEventListener("character-far", handleFar);
+    window.addEventListener("dialog-open", handleDialogOpen);
+
+    return () => {
+      window.removeEventListener("character-nearby", handleNearby);
+      window.removeEventListener("character-far", handleFar);
+      window.removeEventListener("dialog-open", handleDialogOpen);
+    };
+  }, [isPlaying]);
+
+  if (!isPlaying || !showPrompt) return null;
+
+  if (isMobile) {
+    return (
+      <button
+        onClick={() => {
+          window.dispatchEvent(new CustomEvent("request-character-interact"));
+        }}
+        className="absolute bottom-28 left-1/2 -translate-x-1/2 z-20 bg-white/20 backdrop-blur-sm text-white px-6 py-3 rounded-full text-sm font-medium active:bg-white/40 border border-white/30"
+      >
+        Tap to interact
+      </button>
+    );
+  }
+
+  return (
+    <div className="absolute bottom-10 left-1/2 -translate-x-1/2 z-10 bg-black/70 text-white px-4 py-2 rounded-md text-sm">
+      Press &quot;E&quot; to interact
+    </div>
+  );
+}

examples/game-engine/components/hud/loading-spinner.tsx

@@ -0,0 +1,16 @@
+"use client";
+
+import { Loader2 } from "lucide-react";
+import { useEditorStore } from "@/lib/store";
+
+export function LoadingSpinner() {
+  const isLoading = useEditorStore((s) => s.isLoading);
+
+  if (!isLoading) return null;
+
+  return (
+    <div className="absolute top-4 right-4 bg-black/60 rounded-full p-2 shadow-md z-10 backdrop-blur-sm">
+      <Loader2 className="h-5 w-5 animate-spin text-white" />
+    </div>
+  );
+}

examples/game-engine/components/hud/touch-controls.tsx

@@ -0,0 +1,191 @@
+"use client";
+
+import { useEffect, useRef, useCallback } from "react";
+import { ArrowUp } from "lucide-react";
+import { touchMoveState } from "@/lib/touch-state";
+import { useEditorStore } from "@/lib/store";
+
+const JOYSTICK_SIZE = 120;
+const KNOB_SIZE = 48;
+const MAX_DIST = (JOYSTICK_SIZE - KNOB_SIZE) / 2;
+
+export function TouchControls() {
+  const isPlaying = useEditorStore((s) => s.isPlaying);
+  const health = useEditorStore((s) => s.health);
+  const joystickRef = useRef<HTMLDivElement>(null);
+  const knobRef = useRef<HTMLDivElement>(null);
+  const joystickTouchId = useRef<number | null>(null);
+  const joystickCenter = useRef<{ x: number; y: number } | null>(null);
+  const lookTouchRef = useRef<{ x: number; y: number } | null>(null);
+
+  const isGameOver = health <= 0;
+
+  const resetJoystick = useCallback(() => {
+    joystickTouchId.current = null;
+    joystickCenter.current = null;
+    touchMoveState.forward = 0;
+    touchMoveState.right = 0;
+    touchMoveState.sprint = false;
+    if (knobRef.current) {
+      knobRef.current.style.transform = "translate(-50%, -50%)";
+    }
+  }, []);
+
+  useEffect(() => {
+    if (!isPlaying || isGameOver) {
+      resetJoystick();
+      return;
+    }
+
+    const zone = joystickRef.current;
+    if (!zone) return;
+
+    const handleStart = (e: TouchEvent) => {
+      if (joystickTouchId.current !== null) return;
+      for (let i = 0; i < e.changedTouches.length; i++) {
+        const t = e.changedTouches[i]!;
+        const rect = zone.getBoundingClientRect();
+        if (
+          t.clientX >= rect.left &&
+          t.clientX <= rect.right &&
+          t.clientY >= rect.top &&
+          t.clientY <= rect.bottom
+        ) {
+          joystickTouchId.current = t.identifier;
+          joystickCenter.current = { x: t.clientX, y: t.clientY };
+          break;
+        }
+      }
+    };
+
+    const handleMove = (e: TouchEvent) => {
+      if (joystickTouchId.current === null || !joystickCenter.current) return;
+      for (let i = 0; i < e.changedTouches.length; i++) {
+        const t = e.changedTouches[i]!;
+        if (t.identifier !== joystickTouchId.current) continue;
+
+        let dx = t.clientX - joystickCenter.current.x;
+        let dy = t.clientY - joystickCenter.current.y;
+        const dist = Math.sqrt(dx * dx + dy * dy);
+        const clamped = Math.min(dist, MAX_DIST);
+        if (dist > 0) {
+          dx = (dx / dist) * clamped;
+          dy = (dy / dist) * clamped;
+        }
+
+        const normalized = dist > 0 ? Math.min(dist / MAX_DIST, 1) : 0;
+        touchMoveState.right = (dx / MAX_DIST) * normalized;
+        touchMoveState.forward = -(dy / MAX_DIST) * normalized;
+
+        if (knobRef.current) {
+          knobRef.current.style.transform = `translate(calc(-50% + ${dx}px), calc(-50% + ${dy}px))`;
+        }
+        break;
+      }
+    };
+
+    const handleEnd = (e: TouchEvent) => {
+      if (joystickTouchId.current === null) return;
+      for (let i = 0; i < e.changedTouches.length; i++) {
+        if (e.changedTouches[i]!.identifier === joystickTouchId.current) {
+          resetJoystick();
+          break;
+        }
+      }
+    };
+
+    zone.addEventListener("touchstart", handleStart, { passive: true });
+    window.addEventListener("touchmove", handleMove, { passive: true });
+    window.addEventListener("touchend", handleEnd, { passive: true });
+    window.addEventListener("touchcancel", handleEnd, { passive: true });
+
+    return () => {
+      zone.removeEventListener("touchstart", handleStart);
+      window.removeEventListener("touchmove", handleMove);
+      window.removeEventListener("touchend", handleEnd);
+      window.removeEventListener("touchcancel", handleEnd);
+      resetJoystick();
+    };
+  }, [isPlaying, isGameOver, resetJoystick]);
+
+  const handleLookStart = useCallback((e: React.TouchEvent) => {
+    const touch = e.touches[0];
+    if (touch) {
+      lookTouchRef.current = { x: touch.clientX, y: touch.clientY };
+    }
+  }, []);
+
+  const handleLookMove = useCallback((e: React.TouchEvent) => {
+    const touch = e.touches[0];
+    if (!touch || !lookTouchRef.current) return;
+    touchMoveState.lookDeltaX +=
+      (touch.clientX - lookTouchRef.current.x) * 0.004;
+    touchMoveState.lookDeltaY +=
+      (touch.clientY - lookTouchRef.current.y) * 0.004;
+    lookTouchRef.current = { x: touch.clientX, y: touch.clientY };
+  }, []);
+
+  const handleLookEnd = useCallback(() => {
+    lookTouchRef.current = null;
+  }, []);
+
+  const handleJump = useCallback(() => {
+    touchMoveState.jump = true;
+    setTimeout(() => {
+      touchMoveState.jump = false;
+    }, 150);
+  }, []);
+
+  if (!isPlaying || isGameOver) return null;
+
+  return (
+    <>
+      {/* Joystick zone (left half, bottom) */}
+      <div
+        ref={joystickRef}
+        className="fixed left-0 bottom-0 z-20 pointer-events-auto"
+        style={{ width: "45vw", height: "40vh" }}
+      >
+        {/* Joystick base */}
+        <div
+          className="absolute rounded-full border border-white/20 bg-white/5"
+          style={{
+            width: JOYSTICK_SIZE,
+            height: JOYSTICK_SIZE,
+            left: 60 - JOYSTICK_SIZE / 2,
+            bottom: 60 - JOYSTICK_SIZE / 2,
+          }}
+        >
+          {/* Knob */}
+          <div
+            ref={knobRef}
+            className="absolute left-1/2 top-1/2 rounded-full bg-white/25 border border-white/30"
+            style={{
+              width: KNOB_SIZE,
+              height: KNOB_SIZE,
+              transform: "translate(-50%, -50%)",
+            }}
+          />
+        </div>
+      </div>
+
+      {/* Look zone (right half) */}
+      <div
+        className="fixed right-0 top-10 bottom-0 z-20 pointer-events-auto"
+        style={{ width: "55vw" }}
+        onTouchStart={handleLookStart}
+        onTouchMove={handleLookMove}
+        onTouchEnd={handleLookEnd}
+        onTouchCancel={handleLookEnd}
+      />
+
+      {/* Jump button */}
+      <button
+        onTouchStart={handleJump}
+        className="fixed bottom-6 right-6 z-30 w-14 h-14 rounded-full bg-white/15 backdrop-blur-sm border border-white/20 flex items-center justify-center active:bg-white/30 pointer-events-auto"
+      >
+        <ArrowUp size={24} className="text-white/70" />
+      </button>
+    </>
+  );
+}

examples/game-engine/eslint.config.js

@@ -0,0 +1,12 @@
+import { nextJsConfig } from "@internal/eslint-config/next-js";
+
+/** @type {import("eslint").Linter.Config[]} */
+export default [
+  ...nextJsConfig,
+  {
+    rules: {
+      "react/prop-types": "off",
+      "react/no-unknown-property": "off",
+    },
+  },
+];

examples/game-engine/lib/ai-game-prompt.ts

@@ -0,0 +1,71 @@
+import type { SceneObject } from "./types";
+
+export function generateGameAIPrompt(
+  userPrompt: string,
+  objects: SceneObject[] = [],
+  previousPrompts: string[] = [],
+): string {
+  const simplifiedObjects = objects.map((obj) => ({
+    id: obj.id,
+    name: obj.name,
+    type: obj.type,
+    position: obj.position,
+    rotation: obj.rotation,
+    scale: obj.scale,
+    material: obj.material,
+    physics: obj.physics,
+    lightType: obj.lightType,
+    intensity: obj.intensity,
+    damage: obj.damage,
+    shapeData: obj.shapeData,
+    meshData: obj.meshData,
+  }));
+
+  return `You are an AI assistant that helps users create and modify 3D scenes.
+The user has given you this instruction: "${userPrompt}".
+
+You have access to these functions:
+- addObject(type): Creates a new object of type "box", "sphere", "cylinder", "cone", "torus", "plane", "light", "capsule", "extrude", "tetrahedron", "octahedron", "dodecahedron", "icosahedron", "knot", "tube", "shape", "mesh"
+- createCustomObject(type, properties): Creates a new object with custom properties. Properties can include:
+  * name: string
+  * position: [x, y, z]
+  * rotation: [x, y, z] (For plane objects, default rotation is [-1.5708, 0, 0])
+  * scale: [x, y, z] (For plane objects, Z scale is always 1)
+  * material: { color, metalness, roughness, emissive, emissiveIntensity }
+  * physics: { mass, isStatic, restitution, friction, colliderType }
+  * damage: { amount, enabled }
+  * lightType: "ambient", "directional", "point", or "spot"
+  * intensity: number
+  * distance: number
+  * decay: number
+  * angle: number
+  * penumbra: number
+  * shapeData: { points: [x,y][], holes?: [x,y][][] }
+  * meshData: { vertices: number[], indices: number[], normals?: number[], uvs?: number[] }
+- updateObjectTransform(id, {position, rotation, scale}): Updates an object's transform
+- updateObjectMaterial(id, {color, metalness, roughness, emissive, emissiveIntensity}): Updates material
+- updateObjectPhysics(id, {mass, isStatic, restitution, friction, colliderType}): Updates physics
+- updateDamage(id, {amount, enabled}): Updates damage properties
+- selectObject(id): Selects an object
+- setTransformMode(mode): Sets transform mode to "select", "translate", "rotate", or "scale"
+
+Current objects in the scene:
+${JSON.stringify(simplifiedObjects, null, 2)}
+
+Previous user instructions:
+${previousPrompts.map((p) => `- "${p}"`).join("\n")}
+
+Respond with a series of JSON objects, one per line (JSONL format). Each JSON object should have a "function" property and "args" property.
+Example:
+{"function": "createCustomObject", "args": ["box", {"name": "Large Red Box", "position": [0, 1, 0], "scale": [2, 2, 2], "material": {"color": "#ff0000"}, "physics": {"mass": 5, "isStatic": false, "restitution": 0.5}}]}
+{"function": "updateObjectTransform", "args": ["object-id", {"position": [0, -1, 0], "scale": [10, 1, 10]}]}
+
+IMPORTANT CONSTRAINTS:
+1. For plane objects, the Z scale must always be 1.
+2. For plane objects, the default rotation is [-1.5708, 0, 0] to make them horizontal.
+3. Only use the functions listed above.
+4. Your response must be valid JSONL format with one JSON object per line. Do not include any explanations.
+5. Do not wrap your response in an array. Each line should be a separate, complete JSON object.
+6. Each JSON object MUST have exactly this format: {"function": "functionName", "args": [arg1, arg2, ...]}
+7. Do not use JavaScript expressions like Math.PI in your JSON. Use the actual numeric values instead.`;
+}