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 agentmods add skills/vercel-labs/json-render/react-nativenpx skills add vercel-labs/json-render --skill react-nativegit clone --depth 1 https://github.com/vercel-labs/json-renderWhat 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 | $0.00050 | $0.01567 |
| Opus 5 | $0.00025 | $0.00783 |
| Sonnet 5 | $0.00010 | $0.00313 |
| Haiku 4.5 | $0.00005 | $0.00157 |
Grade A, and why
react-native 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 yesterday.
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 — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.
@json-render/react-native
React Native renderer that converts JSON specs into native mobile component trees with standard components, data binding, visibility, actions, and dynamic props.
Quick Start
import { defineCatalog } from "@json-render/core";
import { schema } from "@json-render/react-native/schema";
import {
standardComponentDefinitions,
standardActionDefinitions,
} from "@json-render/react-native/catalog";
import { defineRegistry, Renderer, type Components } from "@json-render/react-native";
import { z } from "zod";
// Create catalog with standard + custom components
const catalog = defineCatalog(schema, {
components: {
...standardComponentDefinitions,
Icon: {
props: z.object({ name: z.string(), size: z.number().nullable(), color: z.string().nullable() }),
slots: [],
description: "Icon display",
},
},
actions: standardActionDefinitions,
});
// Register only custom components (standard ones are built-in)
const { registry } = defineRegistry(catalog, {
components: {
Icon: ({ props }) => <Ionicons name={props.name} size={props.size ?? 24} />,
} as Components<typeof catalog>,
});
// Render
function App({ spec }) {
return (
<StateProvider initialState={{}}>
<VisibilityProvider>
<ActionProvider handlers={{}}>
<Renderer spec={spec} registry={registry} />
</ActionProvider>
</VisibilityProvider>
</StateProvider>
);
}
Standard Components
Layout
Container- wrapper with padding, background, border radiusRow- horizontal flex layout with gap, alignmentColumn- vertical flex layout with gap, alignmentScrollContainer- scrollable area (vertical or horizontal)SafeArea- safe area insets for notch/home indicatorPressable- touchable wrapper that triggers actions on pressSpacer- fixed or flexible spacingDivider- thin line separator
Content
Heading- heading text (levels 1-6)Paragraph- body textLabel- small label textImage- image display with sizing modesAvatar- circular avatar imageBadge- small status badgeChip- tag/chip for categories
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.
- yesterday First seen · 188 lines · 50 tokens per session scan A d5dfbc6128d2
react-native is a skill published in the GitHub repository vercel-labs/json-render (16,056 stars, last pushed 3d ago), licensed Apache-2.0. It adds 50 tokens to every session and 1,567 once invoked, about $0.0003 per session on Opus 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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