magicui: Instructions file for Codex

AGENTS.md

magicui AGENTS.md is an instructions file for Codex, OpenCode from magicuidesign/magicui. It costs 3,445 tokens per session, scanned A, original, MIT.

A set of coding instructions for Magic UI projects, covering project conventions, type safety, code quality, and accessibility. Accessibility means making software usable by people with disabilities.

In plain words
What is it for?
Use it when building or editing Magic UI components to inspect existing patterns, handle edge cases, and check HTML accessibility details.
Why use it?
It gives an agent clear rules to follow before changing JavaScript or TypeScript code, reducing inconsistent code and common accessibility problems.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is magicuidesign/magicui's own configuration. It tells Codex and OpenCode how to work on magicui 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 magicui configures →

About the project

Magic UI is an open-source library of animated interface components and effects that developers can copy into their applications. It is intended for design engineers building React and related web interfaces.

magicuidesign/magicui · 22,821 stars · on GitHub · magicui.design

Reuse

Borrowing it

Nothing to install: this file belongs to magicuidesign/magicui. 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/magicuidesign/magicui/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/magicuidesign/magicui

Made for: Codex, OpenCode.

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 magicui AGENTS.md

README.md
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Your own site
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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.

agentmods 80×15 button for magicui AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/magicuidesign/magicui/agents-md"><img src="https://agentmods.dev/badge/instructions/magicuidesign/magicui/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 3,445 This file is loaded in full into every session.
When invoked 3,445 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 $0.03445 $0.03445
Opus 5.5 $0.01378 $0.01378
Sonnet 5.5 $0.00689 $0.00689
Haiku 4.5 $0.00345 $0.00345

Measured 1mo ago against content hash 91b9ea08b2b5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

magicui AGENTS.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 1mo 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.

Origin

Copies of this mod

3 near-identical copies found in the catalogue:

AGENTS.md · 327 lines

How it starts

The opening of the file, as written. The whole thing — 327 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Project Context

Ultracite enforces strict type safety, accessibility standards, and consistent code quality for JavaScript/TypeScript projects using Biome's lightning-fast formatter and linter.

Key Principles

  • Zero configuration required
  • Subsecond performance
  • Maximum type safety
  • AI-friendly code generation

Before Writing Code

  1. Analyze existing patterns in the codebase
  2. Consider edge cases and error scenarios
  3. Follow the rules below strictly
  4. Validate accessibility requirements

Rules

Accessibility (a11y)

  • Don't use accessKey attribute on any HTML element.
  • Don't set aria-hidden="true" on focusable elements.
  • Don't add ARIA roles, states, and properties to elements that don't support them.
  • Don't use distracting elements like <marquee> or <blink>.
  • Only use the scope prop on <th> elements.
  • Don't assign non-interactive ARIA roles to interactive HTML elements.
  • Make sure label elements have text content and are associated with an input.
  • Don't assign interactive ARIA roles to non-interactive HTML elements.
  • Don't assign tabIndex to non-interactive HTML elements.
  • Don't use positive integers for tabIndex property.
  • Don't include "image", "picture", or "photo" in img alt prop.
  • Don't use explicit role property that's the same as the implicit/default role.
  • Make static elements with click handlers use a valid role attribute.
  • Always include a title element for SVG elements.
  • Give all elements requiring alt text meaningful information for screen readers.
  • Make sure anchors have content that's accessible to screen readers.
  • Assign tabIndex to non-interactive HTML elements with aria-activedescendant.
  • Include all required ARIA attributes for elements with ARIA roles.
  • Make sure ARIA properties are valid for the element's supported roles.
  • Always include a type attribute for button elements.
  • Make elements with interactive roles and handlers focusable.
  • Give heading elements content that's accessible to screen readers (not hidden with aria-hidden).
  • Always include a lang attribute on the html element.
  • Always include a title attribute for iframe elements.
  • Accompany onClick with at least one of: onKeyUp, onKeyDown, or onKeyPress.
  • Accompany onMouseOver/onMouseOut with onFocus/onBlur.
  • Include caption tracks for audio and video elements.
  • Use semantic elements instead of role attributes in JSX.
  • Make sure all anchors are valid and navigable.
  • Ensure all ARIA properties (aria-*) are valid.
  • Use valid, non-abstract ARIA roles for elements with ARIA roles.
  • Use valid ARIA state and property values.
  • Use valid values for the autocomplete attribute on input elements.
  • Use correct ISO language/country codes for the lang attribute.

Read the full file on GitHub · 327 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. 1mo ago First seen · 327 lines · 3,445 tokens per session scan A 91b9ea08b2b5

Subscribe to this mod's changes

magicui AGENTS.md is an instructions file published in the GitHub repository magicuidesign/magicui (22,821 stars, last pushed 7d ago), licensed MIT. It adds 3,445 tokens to every session, about $0.0138 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 2026-08-30.

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