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 ibm-self-serve-assets/building-blocks --skill frontend-developmentgit clone --depth 1 https://github.com/ibm-self-serve-assets/building-blocksWrote 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/ibm-self-serve-assets/building-blocks/frontend-development)<a href="https://agentmods.dev/skills/ibm-self-serve-assets/building-blocks/frontend-development"><img src="https://agentmods.dev/badge/skills/ibm-self-serve-assets/building-blocks/frontend-development/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/ibm-self-serve-assets/building-blocks/frontend-development"><img src="https://agentmods.dev/badge/skills/ibm-self-serve-assets/building-blocks/frontend-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00028 | $0.01056 |
| Opus 5 | $0.00014 | $0.00528 |
| Sonnet 5 | $0.00006 | $0.00211 |
| Haiku 4.5 | $0.00003 | $0.00106 |
Grade A, and why
frontend-development 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 9d 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 — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Development Skill
Use this skill when building or modifying frontend components, implementing UI designs, working with Carbon Design System, ensuring design consistency, or writing user-facing content.
When to Use This Skill
- Creating new React components
- Implementing Carbon Design System components
- Styling components and layouts
- Managing component state and hooks
- Optimizing frontend performance
- Writing accessible UI code
- Creating user-facing content and copy
Core Technologies
- React 18 with hooks
- Carbon Design System v11
- Vite build tool
- CSS/SASS for styling
- Carbon Charts for data visualization
Key Principles
- Component-First Architecture - Build reusable, focused components
- Carbon Design Consistency - Follow IBM Carbon Design System patterns
- Accessibility - Ensure WCAG 2.1 AA compliance
- Performance - Optimize rendering and bundle size
- User-Centered Content - Write clear, concise UI text
Quick Reference
React Component Pattern
import { useState, useEffect } from 'react';
import { Button, TextInput } from '@carbon/react';
export const MyComponent = ({ initialValue }) => {
const [value, setValue] = useState(initialValue);
useEffect(() => {
// Side effects here
}, [value]);
return (
<div>
<TextInput
id="input"
labelText="Label"
value={value}
onChange={(e) => setValue(e.target.value)}
/>
<Button onClick={() => console.log(value)}>
Submit
</Button>
</div>
);
};
Carbon Design System Setup
// Import Carbon styles (in main.jsx or index.css)
import '@carbon/charts-react/styles.css';
// Or use CDN in index.css
@import 'https://unpkg.com/@carbon/[email protected]/css/styles.min.css';
// Import components
import {
Theme,
Button,
TextInput,
PasswordInput, // Separate component in v11
DataTable,
Tabs,
TabList,
Tab
} from '@carbon/react';
Common Patterns
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 164 lines · 28 tokens per session scan A 893e0136d701
frontend-development is a skill published in the GitHub repository ibm-self-serve-assets/building-blocks (24 stars, last pushed today), licensed Apache-2.0. It adds 28 tokens to every session and 1,056 once invoked, about $0.0001 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.
Other skills, from other repositories
chakra-ui-builder
Build responsive, accessible UI components and layouts using Chakra UI v3, install or configure Chakra UI in new and existing projects, and design scalable themes using tokens, semantic tokens, recipes, and slot recipes. Use this skill whenever a user asks to build, create, or generate any UI component, page, form…
antigravity-design-expert
Core UI/UX engineering skill for building highly interactive, spatial, weightless, and glassmorphism-based web interfaces using GSAP and 3D CSS.
frontend-ui-dark-ts
Build dark-themed React applications using Tailwind CSS with custom theming, glassmorphism effects, and Framer Motion animations. Use when creating dashboards, admin panels, or data-rich interfaces with a refined dark aesthetic.
web-artifacts-builder
Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.
liquid-metal-border
Add and tune animated liquid-metal WebGL borders with the React metal-fx package. Use when buttons, icon controls, chips, tabs, cards, or selected surfaces need a metallic active, selected, hover, focus, or premium border; when implementing the MetalFx component from metal.jakubantalik.com; or when troubleshooting its…
21st-ui
Find, install, and generate UI with 21st.dev. Use when the user asks for a UI component (pricing table, hero, navbar, dashboard, form, etc.), wants design inspiration, needs a brand logo as an SVG component, or wants to generate new UI from a prompt.