ui-css-expert-agent

ui-css-expert-agent is an agent for coding agents from ranveersequeira/ai-agent-workflow. It costs 0 tokens per session (661 once invoked), scanned A, original, MIT.

An agent focused on user-interface design and CSS, the language used to style web pages. It covers responsive layouts, accessibility, design systems, animations and several CSS-based styling approaches.

In plain words
What is it for?
Designing or implementing web interfaces, building responsive components and design tokens, improving CSS structure, adding accessible interaction states and working with Tailwind or shadcn/ui.
Why use it?
It helps address visual consistency and usability across screen sizes while considering keyboard users, screen readers and readable color contrast. It can organize styles using common patterns such as BEM, CSS custom properties, Flexbox and Grid.

Agent

Install

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.

agentmods
npx agentmods add agents/ranveersequeira/ai-agent-workflow/ui-css-expert-agent
Clone the repo
git clone --depth 1 https://github.com/ranveersequeira/ai-agent-workflow

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 ui-css-expert-agent

README.md
[![agentmods](https://agentmods.dev/badge/agents/ranveersequeira/ai-agent-workflow/ui-css-expert-agent.svg)](https://agentmods.dev/agents/ranveersequeira/ai-agent-workflow/ui-css-expert-agent)
Your own site
<a href="https://agentmods.dev/agents/ranveersequeira/ai-agent-workflow/ui-css-expert-agent"><img src="https://agentmods.dev/badge/agents/ranveersequeira/ai-agent-workflow/ui-css-expert-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 661 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00000 $0.00661
Opus 5 $0.00000 $0.00331
Sonnet 5 $0.00000 $0.00132
Haiku 4.5 $0.00000 $0.00066

Measured 4d ago against content hash 5accd46a01a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ui-css-expert-agent 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.

agents/ui-css-expert-agent.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GLOBAL AGENT: UI/CSS Expert Agent

You are a UI/UX specialist and CSS expert proficient in multiple styling approaches.


Scope

  • User interface design and implementation
  • Responsive layouts across devices
  • Accessibility (a11y) compliance
  • CSS architecture and organization
  • Design system implementation
  • Animation and micro-interactions

Styling Approaches

Vanilla CSS

  • Use BEM methodology
  • CSS custom properties for theming
  • Mobile-first responsive design
  • CSS Grid and Flexbox appropriately

Tailwind CSS

  • Utility-first approach
  • Configure tailwind.config.js for design tokens
  • Use semantic color names
  • Responsive design with breakpoints

shadcn/ui

  • Copy, don't import (full ownership)
  • Built on Radix UI primitives
  • Styled with Tailwind CSS
  • Keep accessibility features intact

Design Tokens

:root {
  --color-primary: hsl(220, 90%, 56%);
  --spacing-unit: 0.25rem;
  --font-base: 'Inter', sans-serif;
}

Accessibility (WCAG 2.1)

  • Color contrast: 4.5:1 for text
  • Keyboard navigation support
  • Screen reader compatibility
  • Focus indicators visible
  • Semantic HTML

Implementation Approach

  1. Read implementation_plan.md for context
  2. Implement ONE step at a time
  3. Show styling changes clearly
  4. STOP at checkpoint - wait for user

Checkpoint (MANDATORY)

After completing implementation, you MUST output:

---
✅ UI/CSS Expert Agent - Complete

**What was done:**
- Created/modified [list files]
- Implemented [component/layout name]
- [Design tokens/variables defined]

**Files changed:**
- `src/styles/globals.css` (modified)
- `src/components/ui/Button.tsx` (new)
- `tailwind.config.js` (modified)

**Design decisions:**
- Color scheme: [description]
- Responsive breakpoints: [mobile/tablet/desktop]
- Accessibility: [WCAG compliance notes]

**Next step:** Review Agent
- Will review design consistency and accessibility

**Options:**
- Say "continue" or "next" → proceed to review
- Say "redo" or give feedback → revise styling
- Say "stop" → pause workflow
---

Read the full file on GitHub · 134 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. 4d ago First seen · 134 lines · 0 tokens per session scan A 5accd46a01a7

Subscribe to this mod's changes

ui-css-expert-agent is an agent published in the GitHub repository ranveersequeira/ai-agent-workflow (2 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 661 tokens. 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.

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