Radix UI

What it does

When your agent uses it

• Creating accessible
• Customisable UI components
• Setting up theming systems
• Working with pre-styled Radix Themes components

Example prompts

• “radix ui”
• “radix themes”
• “radix primitives”
• “/radix-ui”

Requirements

• Node.js

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

1. 1Spread all props onto the underlying DOM element
2. 2Forward refs using React.forwardRef

What it can do on your machine

Read from SKILL.md and the folder at commit 56a3b4a. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • npm

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Radix UI loads about 1.5k tokens when it runs, and up to ~7.6k if it reads all its reference files. Until then it costs about 115 tokens; SKILL.md has 288 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~115

When it runs · the whole SKILL.md, loaded when a task matches

~1.5k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~7.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from aehrc/pathling at commit 56a3b4a, republished under its Apache-2.0 licence (© aehrc). 288 words, ~1,504 tokens.

name

radix-ui

description

Expert guidance for building React UIs with Radix Themes and Radix Primitives. Use when creating accessible, customisable UI components, setting up theming systems, working with pre-styled Radix Themes components, or building custom components on top of unstyled Radix Primitives. Trigger keywords include "radix", "radix ui", "radix themes", "radix primitives", "accessible components", "Dialog", "Dropdown", "Select", "Accordion", "Tabs", "Tooltip".

npm install @radix-ui/themes

import "@radix-ui/themes/styles.css";
import { Theme } from "@radix-ui/themes";

export default function App() {
    return (
        <Theme accentColor="indigo" grayColor="slate" radius="medium">
            <MyApp />
        </Theme>
    );
}

npm install @radix-ui/react-dialog @radix-ui/react-dropdown-menu

npm install radix-ui

<Button variant="solid" size="2" color="indigo" highContrast />

import { Flex, Box, Grid, Container, Section } from "@radix-ui/themes";

<Flex direction="column" gap="3" align="center" justify="between">
  <Box p="4" style={{ background: "var(--gray-3)" }}>
    Content
  </Box>
</Flex>

<Grid columns="3" gap="4" width="auto">
  <Box>1</Box>
  <Box>2</Box>
  <Box>3</Box>
</Grid>

import { Text, Heading, Code, Em, Strong } from "@radix-ui/themes";

<Heading size="6" weight="bold">Title</Heading>
<Text size="2" color="gray">Body text</Text>
<Code variant="soft">const x = 1</Code>

import * as Dialog from "@radix-ui/react-dialog";

<Dialog.Root>
    <Dialog.Trigger>Open</Dialog.Trigger>
    <Dialog.Portal>
        <Dialog.Overlay className="overlay" />
        <Dialog.Content className="content">
            <Dialog.Title>Title</Dialog.Title>
            <Dialog.Description>Description</Dialog.Description>
            <Dialog.Close>Close</Dialog.Close>
        </Dialog.Content>
    </Dialog.Portal>
</Dialog.Root>;

// Uncontrolled - manages its own state
<Dialog.Root>...</Dialog.Root>

// Controlled - you manage the state
<Dialog.Root open={isOpen} onOpenChange={setIsOpen}>...</Dialog.Root>

import * as Tooltip from "@radix-ui/react-tooltip";
import { MyButton } from "./MyButton";

<Tooltip.Trigger asChild>
    <MyButton>Hover me</MyButton>
</Tooltip.Trigger>;

const MyButton = React.forwardRef<HTMLButtonElement, ButtonProps>(
    ({ children, ...props }, ref) => (
        <button ref={ref} {...props}>
            {children}
        </button>
    ),
);

<Dialog.Overlay className="dialog-overlay" />
<Dialog.Content className="dialog-content" />

.accordion-item[data-state="open"] {
    background: var(--accent-3);
}

.accordion-item[data-state="closed"] {
    background: transparent;
}

<Dialog.Overlay className="fixed inset-0 bg-black/50" />
<Dialog.Content className="fixed top-1/2 left-1/2 -translate-x-1/2 -translate-y-1/2 bg-white p-6 rounded-lg" />

// Dialog requires Title for screen readers
<Dialog.Content aria-describedby={undefined}>
    <Dialog.Title>Required for a11y</Dialog.Title>
    {/* If no description, set aria-describedby={undefined} on Content */}
</Dialog.Content>

© aehrc, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in .claude/skills/radix-ui of aehrc/pathling.

• SKILL.md
• references/primitives-patterns.md
• references/themes-components.md

Open the folder on GitHubat commit 56a3b4a