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Author SHA1 Message Date
github-actions[bot] edbeb5a637 chore: version packages (#87)
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
2026-02-09 07:09:15 -06:00
Chris Tate d9a4efdbeb changeset (#86) 2026-02-09 07:07:17 -06:00
Chris Tate f435643817 more resilient (#85)
* more resilient

* more resilient
2026-02-09 07:05:16 -06:00
Chris Tate 458f3a728c update docs (#84)
* update docs

* fix og
2026-02-09 02:16:06 -06:00
26 changed files with 294 additions and 87 deletions
+16 -15
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@@ -1,8 +1,8 @@
# json-render
**Predictable. Guardrailed. Fast.**
**The framework for User-Generated Interfaces (UGI).**
Let end users generate dashboards, widgets, apps, and videos from prompts — safely constrained to components you define.
Dynamic, personalized UIs per user without sacrificing reliability. Predefined components and actions for safe, predictable output.
```bash
npm install @json-render/core @json-render/react
@@ -14,11 +14,12 @@ npm install @json-render/core @json-render/remotion
## Why json-render?
When users prompt for UI, you need guarantees. json-render gives AI a **constrained vocabulary** so output is always predictable:
json-render enables **User-Generated Interfaces**: dynamic UIs that end users create through natural language prompts, powered by Generative UI. You define the guardrails, AI generates within them:
- **Guardrailed** — AI can only use components in your catalog
- **Predictable** — JSON output matches your schema, every time
- **Fast** — Stream and render progressively as the model responds
- **Guardrailed** - AI can only use components in your catalog
- **Predictable** - JSON output matches your schema, every time
- **Fast** - Stream and render progressively as the model responds
- **Cross-Platform** - React (web) and React Native (mobile) from the same catalog
## Quick Start
@@ -237,8 +238,8 @@ Any prop value can be data-driven using expressions:
Two expression forms:
- **`{ "$path": "/state/key" }`** -- reads a value from the data model
- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** -- evaluates a condition (same syntax as visibility conditions) and picks a branch
- **`{ "$path": "/state/key" }`** - reads a value from the data model
- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** - evaluates a condition (same syntax as visibility conditions) and picks a branch
### Actions
@@ -265,9 +266,9 @@ pnpm install
pnpm dev
```
- http://localhost:3000 -- Docs & Playground
- http://localhost:3001 -- Example Dashboard
- http://localhost:3002 -- Remotion Video Example
- http://localhost:3000 - Docs & Playground
- http://localhost:3001 - Example Dashboard
- http://localhost:3002 - Remotion Video Example
- React Native example: run `npx expo start` in `examples/react-native`
## How It Works
@@ -283,10 +284,10 @@ flowchart LR
D -.- G([streamed])
```
1. **Define the guardrails** — what components, actions, and data bindings AI can use
2. **Users prompt** — end users describe what they want in natural language
3. **AI generates JSON** — output is always predictable, constrained to your catalog
4. **Render fast** — stream and render progressively as the model responds
1. **Define the guardrails** - what components, actions, and data bindings AI can use
2. **Users generate** - end users describe what they want in natural language
3. **AI generates JSON** - output is always predictable, constrained to your catalog
4. **Render fast** - stream and render progressively as the model responds
## License
@@ -93,7 +93,7 @@ React Native renderer with standard components, providers, and hooks.
## defineRegistry
Create a type-safe component registry. Standard components are built-in -- only register custom components.
Create a type-safe component registry. Standard components are built-in; only register custom components.
```tsx
import { defineRegistry, type Components } from '@json-render/react-native';
+1 -1
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@@ -100,7 +100,7 @@ const fixed = autoFixSpec(spec);
### Improved: State Management
`DataProvider` has been renamed to `StateProvider` with a clearer API. State is now a first-class part of specs -- elements can bind to state via `$path` expressions, and the built-in `setState` action updates state directly.
`DataProvider` has been renamed to `StateProvider` with a clearer API. State is now a first-class part of specs. Elements can bind to state via `$path` expressions, and the built-in `setState` action updates state directly.
### Improved: AI Prompts
+13 -7
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@@ -2,17 +2,19 @@ export const metadata = { title: "Introduction" }
# Introduction
Predictable. Guardrailed. Fast. Let users generate dashboards, widgets, apps, and data visualizations from prompts.
The framework for User-Generated Interfaces (UGI). Dynamic, personalized UIs per user without sacrificing reliability.
## What is json-render?
json-render lets end users generate UI from natural language prompts — safely constrained to components you define. You set the guardrails: what components exist, what props they take, what actions are available. AI generates JSON that matches your schema, and your components render it natively.
json-render is the framework for **User-Generated Interfaces**: dynamic UIs that end users generate through natural language prompts, powered by Generative UI. You define the guardrails: what components exist, what props they take, what actions are available. AI generates JSON that matches your schema, and your components render it natively on web or mobile.
Every interface is unique to the user, but every interface is safe and predictable.
## Why json-render?
### Guardrailed
AI can only use components in your catalog. No arbitrary code generation.
AI can only use components in your catalog. No arbitrary code generation. Predefined components and actions for safe, predictable output.
### Predictable
@@ -22,9 +24,13 @@ JSON output matches your schema, every time. Actions are declared by name, you c
Stream and render progressively as the model responds. No waiting for completion.
### Cross-Platform
Render on web with React and on mobile with React Native from the same catalog and spec format.
## How it works
1. Define the guardrails — what components, actions, and data bindings AI can use
2. Users prompt — end users describe what they want in natural language
3. AI generates JSON — output is always predictable, constrained to your catalog
4. Render fast — stream and render progressively as the model responds
1. Define the guardrails - what components, actions, and data bindings AI can use
2. Users generate - end users describe what they want in natural language
3. AI generates JSON - output is always predictable, constrained to your catalog
4. Render fast - stream and render progressively as the model responds
+17 -14
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@@ -9,12 +9,15 @@ export default function Home() {
<>
{/* Hero */}
<section className="max-w-5xl mx-auto px-6 pt-24 pb-16 text-center">
<h1 className="text-5xl sm:text-6xl md:text-7xl font-bold tracking-tighter mb-6">
<p className="text-xs sm:text-sm font-medium text-muted-foreground tracking-widest uppercase mb-4">
The framework for User-Generated Interfaces
</p>
<h1 className="text-4xl sm:text-6xl md:text-7xl font-bold tracking-tighter mb-6">
AI → json-render → UI
</h1>
<p className="text-lg text-muted-foreground max-w-2xl mx-auto mb-12 leading-relaxed">
Define a component catalog. Users prompt. AI outputs JSON constrained
to your catalog. Your components render it.
Dynamic, personalized UIs per user without sacrificing reliability.
Predefined components and actions for safe, predictable output.
</p>
<Demo />
@@ -65,10 +68,10 @@ export default function Home() {
<div className="text-xs text-muted-foreground font-mono mb-3">
02
</div>
<h3 className="text-lg font-semibold mb-2">Users Prompt</h3>
<h3 className="text-lg font-semibold mb-2">Users Generate</h3>
<p className="text-sm text-muted-foreground leading-relaxed">
End users describe what they want. AI generates JSON constrained
to your catalog.
to your catalog. Every interface is unique to the user.
</p>
</div>
<div>
@@ -244,6 +247,10 @@ export default function Page() {
<h2 className="text-2xl font-semibold mb-12 text-center">Features</h2>
<div className="grid sm:grid-cols-2 lg:grid-cols-3 gap-8">
{[
{
title: "User-Generated Interfaces",
desc: "Dynamic, personalized UIs per user powered by Generative UI",
},
{
title: "Guardrails",
desc: "AI can only use components you define in the catalog",
@@ -253,20 +260,16 @@ export default function Page() {
desc: "Progressive rendering as JSON streams from the model",
},
{
title: "Code Export",
desc: "Export as standalone React code with no runtime dependencies",
title: "React & React Native",
desc: "Render on web and mobile from the same catalog and spec format",
},
{
title: "Data Binding",
desc: "Two-way binding with JSON Pointer paths",
desc: "Two-way state binding with dynamic prop expressions",
},
{
title: "Actions",
desc: "Named actions handled by your application",
},
{
title: "Visibility",
desc: "Conditional show/hide based on data or auth",
title: "Code Export",
desc: "Export as standalone React code with no runtime dependencies",
},
].map((feature) => (
<div key={feature.title}>
+10 -6
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@@ -22,11 +22,15 @@ export const metadata: Metadata = {
template: "%s | json-render",
},
description:
"Let users generate dashboards, widgets, apps, and data visualizations from prompts — safely constrained to components you define.",
"The framework for User-Generated Interfaces (UGI). Let users generate dashboards, widgets, and apps from prompts — safely constrained to components you define.",
keywords: [
"json-render",
"UGI",
"User-Generated Interfaces",
"AI UI generation",
"generative UI",
"React components",
"React Native",
"guardrails",
"structured output",
"dashboard builder",
@@ -38,23 +42,23 @@ export const metadata: Metadata = {
locale: "en_US",
url: "https://json-render.dev",
siteName: "json-render",
title: "json-render | AI-generated UI with guardrails",
title: "json-render | The framework for User-Generated Interfaces",
description:
"Let users generate dashboards, widgets, apps, and data visualizations from prompts — safely constrained to components you define.",
"The framework for User-Generated Interfaces (UGI). Let users generate dashboards, widgets, and apps from prompts — safely constrained to components you define.",
images: [
{
url: "/og",
width: 1200,
height: 630,
alt: "json-render - AI-generated UI with guardrails",
alt: "json-render - The framework for User-Generated Interfaces",
},
],
},
twitter: {
card: "summary_large_image",
title: "json-render | AI-generated UI with guardrails",
title: "json-render | The framework for User-Generated Interfaces",
description:
"Let users generate dashboards, widgets, apps, and data visualizations from prompts — safely constrained to components you define.",
"The framework for User-Generated Interfaces (UGI). Let users generate dashboards, widgets, and apps from prompts — safely constrained to components you define.",
images: ["/og"],
creator: "@verabornnot",
},
+17 -13
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@@ -66,23 +66,27 @@ export async function renderOgImage(title: string) {
style={{
display: "flex",
flex: 1,
flexDirection: "column",
alignItems: "center",
justifyContent: "center",
}}
>
<span
style={{
fontSize: 72,
fontFamily: "Geist",
fontWeight: 400,
color: "white",
letterSpacing: "-0.02em",
textAlign: "center",
lineHeight: 1.2,
}}
>
{title}
</span>
{title.split("\n").map((line, i) => (
<span
key={i}
style={{
fontSize: 72,
fontFamily: "Geist",
fontWeight: 400,
color: "white",
letterSpacing: "-0.02em",
textAlign: "center",
lineHeight: 1.2,
}}
>
{line}
</span>
))}
</div>
</div>,
{
+1 -1
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@@ -7,7 +7,7 @@
*/
export const PAGE_TITLES: Record<string, string> = {
// Home (no slug)
"": "AI-generated UI with guardrails",
"": "The framework for\nUser-Generated Interfaces",
// Top-level
playground: "Playground",
+25 -8
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@@ -823,7 +823,12 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
const [localValue, setLocalValue] = useState<string>("");
const value = props.statePath ? (boundValue ?? "") : localValue;
const setValue = props.statePath ? setBoundValue! : setLocalValue;
const options = props.options ?? [];
const rawOptions = props.options ?? [];
// Coerce options to strings – AI may produce objects/numbers instead of
// plain strings which would cause duplicate `[object Object]` keys.
const options = rawOptions.map((opt) =>
typeof opt === "string" ? opt : String(opt ?? ""),
);
return (
<div className="space-y-2">
@@ -839,8 +844,11 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
<SelectValue placeholder={props.placeholder ?? "Select..."} />
</SelectTrigger>
<SelectContent>
{options.map((opt) => (
<SelectItem key={opt} value={opt}>
{options.map((opt, idx) => (
<SelectItem
key={`${idx}-${opt}`}
value={opt || `option-${idx}`}
>
{opt}
</SelectItem>
))}
@@ -876,7 +884,10 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
},
Radio: ({ props, emit }) => {
const options = props.options ?? [];
const rawOptions = props.options ?? [];
const options = rawOptions.map((opt) =>
typeof opt === "string" ? opt : String(opt ?? ""),
);
const [boundValue, setBoundValue] = props.statePath
? useStateBinding<string>(props.statePath) // eslint-disable-line react-hooks/rules-of-hooks
: [undefined, undefined];
@@ -894,11 +905,17 @@ export const { registry, executeAction } = defineRegistry(playgroundCatalog, {
emit?.("change");
}}
>
{options.map((opt) => (
<div key={opt} className="flex items-center space-x-2">
<RadioGroupItem value={opt} id={`${props.name}-${opt}`} />
{options.map((opt, idx) => (
<div
key={`${idx}-${opt}`}
className="flex items-center space-x-2"
>
<RadioGroupItem
value={opt || `option-${idx}`}
id={`${props.name}-${idx}-${opt}`}
/>
<Label
htmlFor={`${props.name}-${opt}`}
htmlFor={`${props.name}-${idx}-${opt}`}
className="cursor-pointer"
>
{opt}
+6
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@@ -1,5 +1,11 @@
# @json-render/codegen
## 0.5.1
### Patch Changes
- @json-render/core@0.5.1
## 0.5.0
### Minor Changes
+1 -1
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@@ -1,6 +1,6 @@
{
"name": "@json-render/codegen",
"version": "0.5.0",
"version": "0.5.1",
"license": "Apache-2.0",
"description": "Utilities for generating code from json-render UI trees",
"keywords": [
+2
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@@ -1,5 +1,7 @@
# @json-render/core
## 0.5.1
## 0.5.0
### Minor Changes
+1 -1
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@@ -1,6 +1,6 @@
{
"name": "@json-render/core",
"version": "0.5.0",
"version": "0.5.1",
"license": "Apache-2.0",
"description": "JSON becomes real things. Define your catalog, register your components, let AI generate.",
"keywords": [
+7
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@@ -1,5 +1,12 @@
# @json-render/react-native
## 0.5.1
### Patch Changes
- d9a4efd: Prevent rendering errors from crashing the application. Added error boundaries to all renderers so a single bad component silently disappears instead of causing a white-screen-of-death. Fixed Select and Radio components to handle non-string option values from AI output.
- @json-render/core@0.5.1
## 0.5.0
### Minor Changes
+1 -1
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@@ -59,7 +59,7 @@ export const { registry } = defineRegistry(catalog, {
});
```
Standard components (Container, Row, Column, Button, TextInput, etc.) are included by default -- you only need to register custom ones.
Standard components (Container, Row, Column, Button, TextInput, etc.) are included by default. You only need to register custom ones.
### 3. Render Specs
+1 -1
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@@ -1,6 +1,6 @@
{
"name": "@json-render/react-native",
"version": "0.5.0",
"version": "0.5.1",
"license": "Apache-2.0",
"description": "React Native renderer for @json-render/core. JSON becomes React Native components.",
"keywords": [
+51 -3
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@@ -1,5 +1,6 @@
import React, {
type ComponentType,
type ErrorInfo,
type ReactNode,
useCallback,
useMemo,
@@ -81,6 +82,51 @@ export interface RendererProps {
fallback?: ComponentRenderer;
}
// ---------------------------------------------------------------------------
// ElementErrorBoundary – catches rendering errors in individual elements so
// a single bad component never crashes the whole page.
// ---------------------------------------------------------------------------
interface ElementErrorBoundaryProps {
elementType: string;
children: ReactNode;
}
interface ElementErrorBoundaryState {
hasError: boolean;
}
class ElementErrorBoundary extends React.Component<
ElementErrorBoundaryProps,
ElementErrorBoundaryState
> {
constructor(props: ElementErrorBoundaryProps) {
super(props);
this.state = { hasError: false };
}
static getDerivedStateFromError(): ElementErrorBoundaryState {
return { hasError: true };
}
componentDidCatch(error: Error, info: ErrorInfo) {
console.error(
`[json-render] Rendering error in <${this.props.elementType}>:`,
error,
info.componentStack,
);
}
render() {
if (this.state.hasError) {
// Render nothing – the element silently disappears rather than
// crashing the entire application.
return null;
}
return this.props.children;
}
}
/**
* Element renderer component
*/
@@ -214,9 +260,11 @@ function ElementRenderer({
);
return (
<Component element={resolvedElement} emit={emit} loading={loading}>
{children}
</Component>
<ElementErrorBoundary elementType={resolvedElement.type}>
<Component element={resolvedElement} emit={emit} loading={loading}>
{children}
</Component>
</ElementErrorBoundary>
);
}
+7
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@@ -1,5 +1,12 @@
# @json-render/react
## 0.5.1
### Patch Changes
- d9a4efd: Prevent rendering errors from crashing the application. Added error boundaries to all renderers so a single bad component silently disappears instead of causing a white-screen-of-death. Fixed Select and Radio components to handle non-string option values from AI output.
- @json-render/core@0.5.1
## 0.5.0
### Minor Changes
+1 -1
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@@ -1,6 +1,6 @@
{
"name": "@json-render/react",
"version": "0.5.0",
"version": "0.5.1",
"license": "Apache-2.0",
"description": "React renderer for @json-render/core. JSON becomes React components.",
"keywords": [
+51 -3
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@@ -2,6 +2,7 @@
import React, {
type ComponentType,
type ErrorInfo,
type ReactNode,
useCallback,
useMemo,
@@ -77,6 +78,51 @@ export interface RendererProps {
fallback?: ComponentRenderer;
}
// ---------------------------------------------------------------------------
// ElementErrorBoundary – catches rendering errors in individual elements so
// a single bad component never crashes the whole page.
// ---------------------------------------------------------------------------
interface ElementErrorBoundaryProps {
elementType: string;
children: ReactNode;
}
interface ElementErrorBoundaryState {
hasError: boolean;
}
class ElementErrorBoundary extends React.Component<
ElementErrorBoundaryProps,
ElementErrorBoundaryState
> {
constructor(props: ElementErrorBoundaryProps) {
super(props);
this.state = { hasError: false };
}
static getDerivedStateFromError(): ElementErrorBoundaryState {
return { hasError: true };
}
componentDidCatch(error: Error, info: ErrorInfo) {
console.error(
`[json-render] Rendering error in <${this.props.elementType}>:`,
error,
info.componentStack,
);
}
render() {
if (this.state.hasError) {
// Render nothing – the element silently disappears rather than
// crashing the entire application.
return null;
}
return this.props.children;
}
}
/**
* Element renderer component
*/
@@ -210,9 +256,11 @@ function ElementRenderer({
);
return (
<Component element={resolvedElement} emit={emit} loading={loading}>
{children}
</Component>
<ElementErrorBoundary elementType={resolvedElement.type}>
<Component element={resolvedElement} emit={emit} loading={loading}>
{children}
</Component>
</ElementErrorBoundary>
);
}
+7
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@@ -1,5 +1,12 @@
# @json-render/remotion
## 0.5.1
### Patch Changes
- d9a4efd: Prevent rendering errors from crashing the application. Added error boundaries to all renderers so a single bad component silently disappears instead of causing a white-screen-of-death. Fixed Select and Radio components to handle non-string option values from AI output.
- @json-render/core@0.5.1
## 0.5.0
### Minor Changes
+1 -1
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@@ -1,6 +1,6 @@
{
"name": "@json-render/remotion",
"version": "0.5.0",
"version": "0.5.1",
"license": "Apache-2.0",
"description": "Remotion renderer for @json-render/core. JSON becomes video compositions.",
"keywords": [
+48 -1
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@@ -1,5 +1,6 @@
"use client";
import React, { type ErrorInfo, type ReactNode } from "react";
import { AbsoluteFill, Sequence } from "remotion";
import type { TimelineSpec, ComponentRegistry, Clip } from "./types";
@@ -33,6 +34,50 @@ export const standardComponents: ComponentRegistry = {
VideoClip,
};
// ---------------------------------------------------------------------------
// ClipErrorBoundary – catches rendering errors in individual clips so
// a single bad clip never crashes the entire composition.
// ---------------------------------------------------------------------------
interface ClipErrorBoundaryProps {
clipId: string;
component: string;
children: ReactNode;
}
interface ClipErrorBoundaryState {
hasError: boolean;
}
class ClipErrorBoundary extends React.Component<
ClipErrorBoundaryProps,
ClipErrorBoundaryState
> {
constructor(props: ClipErrorBoundaryProps) {
super(props);
this.state = { hasError: false };
}
static getDerivedStateFromError(): ClipErrorBoundaryState {
return { hasError: true };
}
componentDidCatch(error: Error, info: React.ErrorInfo) {
console.error(
`[json-render/remotion] Rendering error in clip "${this.props.clipId}" (<${this.props.component}>):`,
error,
info.componentStack,
);
}
render() {
if (this.state.hasError) {
return null;
}
return this.props.children;
}
}
interface RendererProps {
/** The timeline spec to render */
spec: TimelineSpec;
@@ -102,7 +147,9 @@ export function Renderer({
from={clip.from}
durationInFrames={clip.durationInFrames}
>
<Component clip={clip} />
<ClipErrorBoundary clipId={clip.id} component={clip.component}>
<Component clip={clip} />
</ClipErrorBoundary>
</Sequence>
);
};
+2 -2
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@@ -81,8 +81,8 @@ const finalSpec = compiler.getResult();
Any prop value can be a dynamic expression resolved at render time:
- **`{ "$path": "/state/key" }`** -- reads a value from the state model
- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** -- evaluates a visibility condition and picks a branch
- **`{ "$path": "/state/key" }`** - reads a value from the state model
- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** - evaluates a visibility condition and picks a branch
`$cond` uses the same syntax as visibility conditions (`eq`, `neq`, `path`, `and`, `or`, `not`). `$then` and `$else` can themselves be expressions (recursive).
+3 -3
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@@ -110,8 +110,8 @@ Use `Pressable` with the built-in `setState` action for interactive UIs like tab
Any prop value can be a data-driven expression resolved at render time:
- **`{ "$path": "/state/key" }`** -- reads from data model
- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** -- conditional value
- **`{ "$path": "/state/key" }`** - reads from data model
- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** - conditional value
```json
{
@@ -123,7 +123,7 @@ Any prop value can be a data-driven expression resolved at render time:
}
```
Components receive already-resolved props -- no changes needed to component implementations.
Components receive already-resolved props. No changes needed to component implementations.
## Built-in Actions
+3 -3
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@@ -93,8 +93,8 @@ The React schema uses an element tree format:
Any prop value can be a data-driven expression resolved by the renderer before components receive props:
- **`{ "$path": "/state/key" }`** -- reads from data model
- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** -- conditional value
- **`{ "$path": "/state/key" }`** - reads from data model
- **`{ "$cond": <condition>, "$then": <value>, "$else": <value> }`** - conditional value
```json
{
@@ -106,7 +106,7 @@ Any prop value can be a data-driven expression resolved by the renderer before c
}
```
Components receive already-resolved props -- no changes needed to component implementations.
Components receive already-resolved props. No changes needed to component implementations.
## Event System