react

react is a skill for Claude Code, Codex from dhaupin/vant. It costs 6 tokens per session (362 once invoked), scanned A, original, MIT.

A JavaScript library for building web interfaces from reusable components such as forms, lists, and buttons. It also documents common ways to manage component state and test rendered output.

In plain words
What is it for?
Use it to build single-page applications, create reusable interface components, manage local or shared data, and test what users see.
Why use it?
It helps keep user interfaces organized as they grow, instead of putting all page behavior in one large file.

Skill for Claude CodeCodex

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

Good fit Use it to build single-page applications, create reusable interface components, manage local or shared data, and test what users see.

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Install with agentmods
npx agentmods add skills/dhaupin/vant/vant-skill-react
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 dhaupin/vant --skill vant-skill-react
Clone the repo
git clone --depth 1 https://github.com/dhaupin/vant

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 react

README.md
[![agentmods](https://agentmods.dev/badge/skills/dhaupin/vant/vant-skill-react/github.svg)](https://agentmods.dev/skills/dhaupin/vant/vant-skill-react)
Your own site
<a href="https://agentmods.dev/skills/dhaupin/vant/vant-skill-react"><img src="https://agentmods.dev/badge/skills/dhaupin/vant/vant-skill-react/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.

agentmods 80×15 button for react

Your own site · 80×15
<a href="https://agentmods.dev/skills/dhaupin/vant/vant-skill-react"><img src="https://agentmods.dev/badge/skills/dhaupin/vant/vant-skill-react.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 6 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 362 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.
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 $0.00006 $0.00362
Opus 5.5 $0.00002 $0.00145
Sonnet 5.5 $0.00001 $0.00072
Haiku 4.5 $0.00001 $0.00036

Measured 1mo ago against content hash 6e25b8601da8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

react 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.

models/public/vant/skills/vant-skill-react/SKILL.md · 94 lines

What it actually says

React

Frontend component library.


When To Use

  • DOM components
  • SPA framework
  • Component-based UI

What To Do

1. Component Pattern

function MyComponent({ prop }) {
  const [state, setState] = useState(null)

  useEffect(() => {
    // side effects
  }, [])

  return <div>{prop}</div>
}

2. Common Hooks

Hook What
useState Local state
useEffect Side effects
useContext Shared state
useRef DOM reference
useMemo Memorized value
useCallback Memorized function

3. Patterns

// Conditional
{condition && <Component />}

// List
items.map(item => <Item key={item.id} {...item} />)

// Form
<form onSubmit={handleSubmit}>
  <input value={value} onChange={e => setValue(e.target.value)} />
</form>

4. Testing

render(<MyComponent prop="value" />)
expect(screen.getByText('value')).toBeInTheDocument()

Output

## React

| Component | Tested | Status |
|------------|--------|--------|
| [name] | [YES/NO] | [OK] |

### Props Interface
- [list]

Role: React Developer
Input: Components
Output: Working UI

Component-based UI.

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. 1mo ago First seen · 94 lines · 6 tokens per session scan A 6e25b8601da8

Subscribe to this mod's changes

react is a skill published in the GitHub repository dhaupin/vant (11 stars, last pushed yesterday), licensed MIT. It adds 6 tokens to every session and 362 once invoked, about $0.0000 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 2026-08-31.

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