json-render is a framework where AI produces user interfaces as structured JSON constrained by a developer-defined component catalogue. It is for building dynamic interfaces from natural-language prompts across web and mobile frameworks.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add vercel-labs/json-render --skill react-three-fibergit clone --depth 1 https://github.com/vercel-labs/json-renderWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/vercel-labs/json-render/react-three-fiber)<a href="https://agentmods.dev/skills/vercel-labs/json-render/react-three-fiber"><img src="https://agentmods.dev/badge/skills/vercel-labs/json-render/react-three-fiber/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/vercel-labs/json-render/react-three-fiber"><img src="https://agentmods.dev/badge/skills/vercel-labs/json-render/react-three-fiber.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00054 | $0.01384 |
| Opus 5.5 | $0.00022 | $0.00554 |
| Sonnet 5.5 | $0.00011 | $0.00277 |
| Haiku 4.5 | $0.00005 | $0.00138 |
Grade A, and why
react-three-fiber scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.
@json-render/react-three-fiber
React Three Fiber renderer for json-render. 19 built-in 3D components.
Two Entry Points
| Entry Point | Exports | Use For |
|---|---|---|
@json-render/react-three-fiber/catalog |
threeComponentDefinitions |
Catalog schemas (no R3F dependency, safe for server) |
@json-render/react-three-fiber |
threeComponents, ThreeRenderer, ThreeCanvas, schemas |
R3F implementations and renderer |
Usage Pattern
Pick the 3D components you need from the standard definitions:
import { defineCatalog } from "@json-render/core";
import { schema } from "@json-render/react/schema";
import { threeComponentDefinitions } from "@json-render/react-three-fiber/catalog";
import { defineRegistry } from "@json-render/react";
import { threeComponents, ThreeCanvas } from "@json-render/react-three-fiber";
// Catalog: pick definitions
const catalog = defineCatalog(schema, {
components: {
Box: threeComponentDefinitions.Box,
Sphere: threeComponentDefinitions.Sphere,
AmbientLight: threeComponentDefinitions.AmbientLight,
DirectionalLight: threeComponentDefinitions.DirectionalLight,
OrbitControls: threeComponentDefinitions.OrbitControls,
},
actions: {},
});
// Registry: pick matching implementations
const { registry } = defineRegistry(catalog, {
components: {
Box: threeComponents.Box,
Sphere: threeComponents.Sphere,
AmbientLight: threeComponents.AmbientLight,
DirectionalLight: threeComponents.DirectionalLight,
OrbitControls: threeComponents.OrbitControls,
},
});
Rendering
ThreeCanvas (convenience wrapper)
<ThreeCanvas
spec={spec}
registry={registry}
shadows
camera={{ position: [5, 5, 5], fov: 50 }}
style={{ width: "100%", height: "100vh" }}
/>
Manual Canvas setup
import { Canvas } from "@react-three/fiber";
import { ThreeRenderer } from "@json-render/react-three-fiber";
<Canvas shadows>
<ThreeRenderer spec={spec} registry={registry}>
{/* Additional R3F elements */}
</ThreeRenderer>
</Canvas>
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 181 lines · 54 tokens per session scan A f1120aeaf7cf
react-three-fiber is a skill published in the GitHub repository vercel-labs/json-render (18,783 stars, last pushed yesterday), licensed Apache-2.0. It adds 54 tokens to every session and 1,384 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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