jotai

jotai is a skill for Claude Code, Codex from vercel-labs/json-render. It costs 36 tokens per session (525 once invoked), scanned A, original, Apache-2.0.

An adapter that lets json-render use Jotai, a JavaScript library for managing shared application state. It connects a Jotai atom—a container for a piece of state—to json-render's state interface.

In plain words
What is it for?
Use it when integrating @json-render/jotai with a React application, storing json-render state in Jotai atoms, or sharing state between rendered components and other Jotai components.
Why use it?
It allows json-render and the rest of an application to read and update the same state through Jotai, including an existing shared Jotai store.

Skill for Claude CodeCodex ✓ vendor

Written for no agent in particular: nothing here depends on one.

Good fit Use it when integrating @json-render/jotai with a React application, storing json-render state in Jotai atoms, or sharing state between rendered components and other Jotai components.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vercel-labs/json-render/jotai
About the project

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.

vercel-labs/json-render · 19,433 stars · on GitHub · json-render.dev

Install

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.

Any agent
npx skills add vercel-labs/json-render --skill jotai
Clone the repo
git clone --depth 1 https://github.com/vercel-labs/json-render

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for jotai

README.md
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Your own site
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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.

agentmods 80×15 button for jotai

Your own site · 80×15
<a href="https://agentmods.dev/skills/vercel-labs/json-render/jotai"><img src="https://agentmods.dev/badge/skills/vercel-labs/json-render/jotai.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 525 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 14 Sept 2026
  • Snyk pass 14 Sept 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00036 $0.00525
Opus 5.5 $0.00014 $0.00210
Sonnet 5.5 $0.00007 $0.00105
Haiku 4.5 $0.00004 $0.00052

Measured 2mo ago against content hash 9b0fd4fd0359, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

jotai 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 2mo 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.

skills/jotai/SKILL.md · 67 lines

What it actually says

@json-render/jotai

Jotai adapter for json-render's StateStore interface. Wire a Jotai atom as the state backend for json-render.

Installation

npm install @json-render/jotai @json-render/core @json-render/react jotai

Usage

import { atom } from "jotai";
import { jotaiStateStore } from "@json-render/jotai";
import { StateProvider } from "@json-render/react";

// 1. Create an atom that holds the json-render state
const uiAtom = atom<Record<string, unknown>>({ count: 0 });

// 2. Create the json-render StateStore adapter
const store = jotaiStateStore({ atom: uiAtom });

// 3. Use it
<StateProvider store={store}>
  {/* json-render reads/writes go through Jotai */}
</StateProvider>

With a Shared Jotai Store

When your app already uses a Jotai <Provider> with a custom store, pass it so both json-render and your components share the same state:

import { atom, createStore } from "jotai";
import { Provider as JotaiProvider } from "jotai/react";
import { jotaiStateStore } from "@json-render/jotai";
import { StateProvider } from "@json-render/react";

const jStore = createStore();
const uiAtom = atom<Record<string, unknown>>({ count: 0 });

const store = jotaiStateStore({ atom: uiAtom, store: jStore });

<JotaiProvider store={jStore}>
  <StateProvider store={store}>
    {/* Both json-render and useAtom() see the same state */}
  </StateProvider>
</JotaiProvider>

API

jotaiStateStore(options)

Creates a StateStore backed by a Jotai atom.

Option Type Required Description
atom WritableAtom<StateModel, [StateModel], void> Yes A writable atom holding the state model
store Jotai Store No The Jotai store instance. Defaults to a new store. Pass your own to share state with <Provider>.
Changes

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.

  1. 2mo ago First seen · 67 lines · 36 tokens per session scan A 9b0fd4fd0359

Subscribe to this mod's changes

jotai is a skill published in the GitHub repository vercel-labs/json-render (19,433 stars, last pushed yesterday), licensed Apache-2.0. It adds 36 tokens to every session and 525 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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