Borrowing it
Nothing to install: this file belongs to thunder-id/thunderid. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/thunder-id/thunderid/main/.agent/skills/ui-development/SKILL.mdgit clone --depth 1 https://github.com/thunder-id/thunderidWrote 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/thunder-id/thunderid/ui-development)<a href="https://agentmods.dev/skills/thunder-id/thunderid/ui-development"><img src="https://agentmods.dev/badge/skills/thunder-id/thunderid/ui-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/thunder-id/thunderid/ui-development"><img src="https://agentmods.dev/badge/skills/thunder-id/thunderid/ui-development.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 | $0.00070 | $0.06608 |
| Opus 5.5 | $0.00028 | $0.02643 |
| Sonnet 5.5 | $0.00014 | $0.01322 |
| Haiku 4.5 | $0.00007 | $0.00661 |
Grade A, and why
ui-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 4d 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 — 341 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend UI: Oxygen UI, Styling, and Components
ThunderID's UI is built on Oxygen UI (@wso2/oxygen-ui), WSO2's component library on top of Material UI v7, plus
ThunderID's own shared components in @thunderid/components. The goal of this skill is that every screen looks and
behaves the same, and that no feature package grows a private copy of something that already exists.
Read with frontend/AGENTS.md, which covers routing, error display, and i18n fallbacks.
1. Before Writing Any Component, Look It Up
Resolve every UI need in this order and stop at the first hit:
@thunderid/components: ThunderID's shared building blocks (catalog in section 3). Readfrontend/packages/components/src/index.tsfor the current export list. Never trust a copied list, this one included.- Oxygen custom components:
PageContent,PageTitle,ListingTable,AppShell,Header,Sidebar,Form.*,SearchBar,ComplexSelect,StatCard,CodeBlock,NotificationBanner,UserMenu, and others. - Oxygen's re-exported MUI primitives:
Box,Stack,Typography,Button,Dialog*,Alert,Tabs,TextField,Tooltip,CircularProgress, MUI X as namespaces (DataGrid.DataGrid,DatePickers.DatePicker,TreeView.TreeView), and the rest. - Only then a new component. If it is needed by one feature, keep it in that
configure-*package. If a second package needs it, move it into@thunderid/componentsinstead of copying it.
1a. Read the Component's Docs and Guides First
Every Oxygen component has a docs page, and many carry usage guidance: which variant to use when, and an Accessibility block describing how to label and operate it. Read them before using a component you have not used in this codebase, and before changing how an existing one is configured (switching a table variant, adding a toolbar, changing a dialog's actions). Do not guess a prop or variant.
Check the pinned version first. It is the @wso2/oxygen-ui entry in the root pnpm-workspace.yaml catalog, written
<version> below.
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.
- 4d ago First seen · 341 lines · 70 tokens per session scan A 1c8abc7a6ad0
ui-development is a skill published in the GitHub repository thunder-id/thunderid (594 stars, last pushed yesterday), licensed Apache-2.0. It adds 70 tokens to every session and 6,608 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 2026-10-23.
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.
tamagui-v6-config
Tamagui v6 theme system: the light/dark/accent/brand/inverse/level/active theme family, the background-active one-off key, and recipe-tree authoring with createV6Config. Use when choosing a theme for a surface, building a selected/emphasis state, or authoring a custom v6 colors pack.
tamagui-theme-generator
Generate custom Tamagui themes, color palettes, and preview URLs. Use when creating or refining a color scheme, authoring light/dark palettes with brand accents, or previewing generated themes in the browser.
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…
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.