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 TanStack/devtools --skill devtools-app-setupgit clone --depth 1 https://github.com/TanStack/devtoolsWrote 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/tanstack/devtools/devtools-app-setup)<a href="https://agentmods.dev/skills/tanstack/devtools/devtools-app-setup"><img src="https://agentmods.dev/badge/skills/tanstack/devtools/devtools-app-setup/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/tanstack/devtools/devtools-app-setup"><img src="https://agentmods.dev/badge/skills/tanstack/devtools/devtools-app-setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high YARA Match · line 3 YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
- high Prompt Injection · line 242 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
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 | $0.00066 | $0.02410 |
| Opus 5.5 | $0.00026 | $0.00964 |
| Sonnet 5.5 | $0.00013 | $0.00482 |
| Haiku 4.5 | $0.00007 | $0.00241 |
Grade A, and why
devtools-app-setup 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 — 361 lines — stays where its author put it; the contents beside it link to each section on GitHub.
TanStack Devtools App Setup
Setup
React (primary)
Install as dev dependencies:
npm install -D @tanstack/react-devtools @tanstack/devtools-vite
Mount TanStackDevtools at the root of your application:
import { StrictMode } from 'react'
import { createRoot } from 'react-dom/client'
import { TanStackDevtools } from '@tanstack/react-devtools'
import App from './App'
createRoot(document.getElementById('root')!).render(
<StrictMode>
<App />
<TanStackDevtools />
</StrictMode>,
)
Add plugins via the plugins prop. Each plugin needs name (string) and render (JSX element or render function):
import { TanStackDevtools } from '@tanstack/react-devtools'
import { ReactQueryDevtoolsPanel } from '@tanstack/react-query-devtools'
import { TanStackRouterDevtoolsPanel } from '@tanstack/react-router-devtools'
;<TanStackDevtools
plugins={[
{
name: 'TanStack Query',
render: <ReactQueryDevtoolsPanel />,
},
{
name: 'TanStack Router',
render: <TanStackRouterDevtoolsPanel />,
},
]}
/>
Vue
npm install -D @tanstack/vue-devtools
Vue uses component (not render) in plugin definitions. This is the TanStackDevtoolsVuePlugin type:
<script setup lang="ts">
import { TanStackDevtools } from '@tanstack/vue-devtools'
import type { TanStackDevtoolsVuePlugin } from '@tanstack/vue-devtools'
import { VueQueryDevtoolsPanel } from '@tanstack/vue-query-devtools'
const plugins: TanStackDevtoolsVuePlugin[] = [
{ name: 'Vue Query', component: VueQueryDevtoolsPanel },
]
</script>
<template>
<App />
<TanStackDevtools :plugins="plugins" />
</template>
The Vite plugin (@tanstack/devtools-vite) is optional for Vue but recommended for enhanced console logs and go-to-source.
Solid
npm install -D @tanstack/solid-devtools @tanstack/devtools-vite
import { render } from 'solid-js/web'
import { TanStackDevtools } from '@tanstack/solid-devtools'
import { SolidQueryDevtoolsPanel } from '@tanstack/solid-query-devtools'
import App from './App'
render(
() => (
<>
<App />
<TanStackDevtools
plugins={[
{
name: 'TanStack Query',
render: <SolidQueryDevtoolsPanel />,
},
]}
/>
</>
),
document.getElementById('root')!,
)
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 · 361 lines · 66 tokens per session scan A c77ea90be986
devtools-app-setup is a skill published in the GitHub repository TanStack/devtools (506 stars, last pushed today), licensed MIT. It adds 66 tokens to every session and 2,410 once invoked, about $0.0003 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.
Other skills, from other repositories
install-next
Installs and wires @rsc-boundary/next into a Next.js App Router app (dependencies, root layout provider, optional explicit markers). Use when the user wants to add RSC Boundary, integrate @rsc-boundary/next, or set up server/client boundary devtools in Next.js. The unscoped rsc-boundary package on npm is deprecated …
install-start
Installs and wires the npm package @rsc-boundary/start into a TanStack Start app (dependencies, root route provider, optional explicit markers). Use when the user wants to add RSC Boundary to a TanStack Start / TanStack Router app, or set up server/client boundary devtools with TanStack.
zustand-docs
Zustand — small, fast, scalable state management for React. Store creation, hooks, middleware, TypeScript.
vite-browser-core-debug
Core troubleshooting workflow for Vue/React/Svelte Vite apps using vite-browser. Use this for first-pass debugging when the user reports broken UI behavior, wrong component state, router/store confusion, or a vague "page is broken" symptom and the dominant failure mode is not yet known.
react-patterns
Idiomatic React — hooks, composition, and clear state boundaries. Use when writing or reviewing React components.
remotion-conventions
Programmatic video with Remotion — compositions, timing, and rendering. Use when building Remotion videos.