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Copilot-Skills: Instructions file for GitHub Copilot

.github/instructions/radix-ui.instructions.md

Copilot-Skills radix-ui.instructions.md is an instructions file for GitHub Copilot from TheSethRose/Copilot-Skills. It costs 1,699 tokens per session, scanned A, original, MIT.

Automatic coding guidance for Radix UI, a collection of unstyled, reusable interface components for React. It focuses on accessibility, keyboard use, focus handling, semantic HTML, and composable component parts.

In plain words
What is it for?
Use it when building dialogs, menus, selects, checkboxes, and other interfaces with Radix UI or its React packages.
Why use it?
It helps prevent common interface problems for keyboard users and people using screen readers while leaving the visual design under your control.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is TheSethRose/Copilot-Skills's own configuration. It tells GitHub Copilot how to work on Copilot-Skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Copilot-Skills configures →

not rated 3repo 9mo ago A scan 1,699 tokens original MIT
View source ↗ TheSethRose/Copilot-Skills x.com
Reuse

Borrowing it

Nothing to install: this file belongs to TheSethRose/Copilot-Skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/TheSethRose/Copilot-Skills/main/.github/instructions/radix-ui.instructions.md
Clone the repo
git clone --depth 1 https://github.com/TheSethRose/Copilot-Skills

Made for: GitHub Copilot.

Wrote 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.

agentmods badge for Copilot-Skills radix-ui.instructions.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/thesethrose/copilot-skills/radix-ui.svg)](https://agentmods.dev/instructions/thesethrose/copilot-skills/radix-ui)
Your own site
<a href="https://agentmods.dev/instructions/thesethrose/copilot-skills/radix-ui"><img src="https://agentmods.dev/badge/instructions/thesethrose/copilot-skills/radix-ui.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,699 This file is loaded in full into every session.
When invoked 1,699 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.01699 $0.01699
Opus 5 $0.00849 $0.00849
Sonnet 5 $0.00340 $0.00340
Haiku 4.5 $0.00170 $0.00170

Measured 7d ago against content hash 95d101b7ac52, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

Copilot-Skills radix-ui.instructions.md 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 7d 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.

.github/instructions/radix-ui.instructions.md · 231 lines

How it starts

The opening of the file, as written. The whole thing — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Radix UI - Automatic Context Instructions

Related Prompt: /radix-ui
Related Skill: .github/copilot-skills/ui/radix-ui/

Triggers: radix-ui, @radix-ui/react-, Dialog, Select, Menu, Checkbox, primitives, composable components, unstyled components

Context: What This Provides

When working with Radix UI packages (@radix-ui/react-*) or when user queries mention accessibility, component composition, or unstyled components, this context is automatically activated.

Core Principles

Accessibility First

  • WAI-ARIA Compliance - All components follow official ARIA patterns
  • Keyboard Navigation - Full keyboard support is mandatory
  • Focus Management - Explicit focus control with callbacks
  • Screen Reader Testing - Test with assistive technologies
  • Semantic HTML - Use proper semantic elements

Unstyled & Composable

  • No Default Styles - You control the appearance completely
  • Granular Components - Root, Trigger, Content, Overlay, etc. parts
  • asChild Flexibility - Replace root element with custom component
  • Portal Pattern - Use Portal for overlays/modals
  • Type Safety - Full TypeScript support

Developer Experience

  • Consistent APIs - Similar structure across all components
  • Well Documented - Clear examples and patterns available
  • Incremental Adoption - Use components alongside existing code
  • No Breaking Changes - Stable, predictable versioning

Default Behaviors

When user mentions "Radix UI component"

  1. Suggest /radix-ui skill prompt for comprehensive guide
  2. Review component structure (Root, Trigger, Content, etc.)
  3. Check for Portal usage in overlay components
  4. Verify ARIA labels are present
  5. Consider focus management needs

When user mentions "accessibility" or "a11y"

  1. Activate Radix UI accessibility best practices
  2. Suggest /radix-ui skill for pattern examples
  3. Recommend keyboard testing (Tab, Escape, Arrows)
  4. Check ARIA attributes (aria-label, aria-describedby, etc.)
  5. Review screen reader compatibility

Read the full file on GitHub · 231 lines

Changes

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.

  1. 7d ago First seen · 231 lines · 1,699 tokens per session scan A 95d101b7ac52

Subscribe to this mod's changes

Copilot-Skills radix-ui.instructions.md is an instructions file published in the GitHub repository TheSethRose/Copilot-Skills (3 stars, last pushed 9mo ago), licensed MIT. It adds 1,699 tokens to every session, about $0.0085 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 2026-08-31.

Design and UXFrontendReactclaude-skillscopilotgithubskills
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