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 HK-hub/AgentSkills --skill frontend-reactgit clone --depth 1 https://github.com/HK-hub/AgentSkillsWrote 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/hk-hub/agentskills/frontend-react)<a href="https://agentmods.dev/skills/hk-hub/agentskills/frontend-react"><img src="https://agentmods.dev/badge/skills/hk-hub/agentskills/frontend-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.
<a href="https://agentmods.dev/skills/hk-hub/agentskills/frontend-react"><img src="https://agentmods.dev/badge/skills/hk-hub/agentskills/frontend-react.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00054 | $0.01122 |
| Opus 5 | $0.00027 | $0.00561 |
| Sonnet 5 | $0.00011 | $0.00224 |
| Haiku 4.5 | $0.00005 | $0.00112 |
Grade A, and why
frontend-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 8d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- frontend-react — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.
React Development Skill
Comprehensive skill for modern React development, focusing on Next.js, TypeScript, Tailwind CSS, and the wider React ecosystem.
Technology Stack
Core Framework: React + Next.js
React Fundamentals
- Component-Based: Declarative UI building blocks
- Hooks: Functional state and side-effect management (
useState,useEffect,useContext) - Virtual DOM: Efficient reconciliation and rendering
- React Server Components (RSC): Server-side rendering with zero client-side bundle size for static content
Next.js Features (App Router)
- App Router: File-system based routing in
app/directory - Server Actions: Direct server-side mutations from client components
- Streaming SSR: Progressive rendering with Suspense
- Metadata API: SEO and social share optimization
- Route Handlers: API endpoints (GET, POST, etc.) in
route.tsfiles - Middleware: Request interception and processing
UI Framework: Tailwind CSS + shadcn/ui
Tailwind CSS
- Utility-first CSS framework
- Responsive design with prefixes (
md:,lg:) - Custom configuration via
tailwind.config.ts - Dark mode support
shadcn/ui
- Reusable components built with Radix UI and Tailwind CSS
- Accessible and customizable
- "Own your code" philosophy (components copied to your project)
- Key Components: Button, Dialog, Form, Dropdown, Card, Sheet
State Management
- Local State:
useState,useReducer - Global State: React Context, Zustand (for lightweight global state)
- Server State: TanStack Query (React Query) for async data fetching and caching
Project Architecture
Recommended Directory Structure (Next.js App Router)
src/
├── app/
│ ├── layout.tsx # Root layout
│ ├── page.tsx # Home page
│ ├── globals.css # Global styles
│ ├── (auth)/ # Route group (doesn't affect URL path)
│ │ ├── login/
│ │ │ └── page.tsx
│ │ └── register/
│ │ └── page.tsx
│ └── api/ # API routes
├── components/
│ ├── ui/ # shadcn/ui components
│ │ ├── button.tsx
│ │ └── ...
│ ├── Navbar.tsx
│ └── Footer.tsx
├── lib/
│ ├── utils.ts # Utility functions (cn, etc.)
│ └── db.ts # Database connection
└── hooks/ # Custom React hooks
└── use-toast.ts
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.
- 8d ago First seen · 135 lines · 54 tokens per session scan A c98163ef72f5
frontend-react is a skill published in the GitHub repository HK-hub/AgentSkills (6 stars, last pushed 24d ago), licensed MIT. It adds 54 tokens to every session and 1,122 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 2026-09-03.
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