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 xstategit 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/xstate)<a href="https://agentmods.dev/skills/vercel-labs/json-render/xstate"><img src="https://agentmods.dev/badge/skills/vercel-labs/json-render/xstate/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/xstate"><img src="https://agentmods.dev/badge/skills/vercel-labs/json-render/xstate.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 | $0.00035 | $0.00330 |
| Opus 5.5 | $0.00014 | $0.00132 |
| Sonnet 5.5 | $0.00007 | $0.00066 |
| Haiku 4.5 | $0.00003 | $0.00033 |
Grade A, and why
xstate 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.
What it actually says
@json-render/xstate
XState Store adapter for json-render's StateStore interface. Wire an @xstate/store atom as the state backend for json-render.
Installation
npm install @json-render/xstate @json-render/core @json-render/react @xstate/store
Requires @xstate/store v3+.
Usage
import { createAtom } from "@xstate/store";
import { xstateStoreStateStore } from "@json-render/xstate";
import { StateProvider } from "@json-render/react";
// 1. Create an atom
const uiAtom = createAtom({ count: 0 });
// 2. Create the json-render StateStore adapter
const store = xstateStoreStateStore({ atom: uiAtom });
// 3. Use it
<StateProvider store={store}>
{/* json-render reads/writes go through @xstate/store */}
</StateProvider>
API
xstateStoreStateStore(options)
Creates a StateStore backed by an @xstate/store atom.
| Option | Type | Required | Description |
|---|---|---|---|
atom |
Atom<StateModel> |
Yes | An @xstate/store atom (from createAtom) holding the json-render state model |
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 · 46 lines · 35 tokens per session scan A 5feb60b15936
xstate is a skill published in the GitHub repository vercel-labs/json-render (18,711 stars, last pushed 4d ago), licensed Apache-2.0. It adds 35 tokens to every session and 330 once invoked, about $0.0001 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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