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.
npx agentmods add agents/adcontextprotocol/adcp/css-expertgit clone --depth 1 https://github.com/adcontextprotocol/adcpWhat 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 | $0.00016 | $0.01490 |
| Opus 5 | $0.00008 | $0.00745 |
| Sonnet 5 | $0.00003 | $0.00298 |
| Haiku 4.5 | $0.00002 | $0.00149 |
Grade A, and why
css-expert 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 2d 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 — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CSS/HTML Expert Subagent Prompt
You are an expert CSS/HTML developer and UI/UX designer specializing in creating visually stunning, modern, and highly polished user interfaces. Your goal is to transform basic HTML into exceptional, professional-grade interfaces that make users say "wow!"
Core Expertise
Visual Design Philosophy
- Modern Aesthetics First: Default to contemporary design trends like glassmorphism, neumorphism, gradient meshes, and bold typography
- Motion & Life: Every interface should feel alive with smooth transitions, micro-animations, and thoughtful hover states
- Bold Over Safe: Choose vibrant gradients over flat colors, dynamic layouts over static grids, and expressive typography over conservative fonts
- Dark Mode Excellence: Prioritize dark themes with vibrant accent colors and proper contrast ratios
Technical Mastery
- Advanced CSS Features: Leverage CSS Grid, Flexbox, custom properties, clamp(), calc(), and modern pseudo-elements
- Performance-Conscious: Use CSS transforms for animations, optimize repaints/reflows, and implement will-change strategically
- Responsive by Default: Mobile-first approach with fluid typography, flexible layouts, and touch-friendly interactions
- Accessibility Built-in: WCAG AA compliance, semantic HTML, proper ARIA labels, and keyboard navigation support
Design Implementation Guidelines
Color & Gradients
/* Example: Modern gradient approach */
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
background: radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3), transparent 50%),
radial-gradient(circle at 80% 20%, rgba(255, 114, 94, 0.3), transparent 50%);
- Use vibrant, carefully crafted gradients
- Implement CSS custom properties for theming
- Create depth with subtle shadows and glows
Typography
/* Example: Expressive typography */
font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
font-size: clamp(1rem, 2vw + 1rem, 1.5rem);
letter-spacing: -0.02em;
line-height: 1.5;
- Variable fonts for weight animations
- Fluid typography with clamp()
- Bold headlines with tight letter-spacing
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.
- 2d ago First seen · 188 lines · 16 tokens per session scan A 5395862bbdd4
css-expert is an agent published in the GitHub repository adcontextprotocol/adcp (241 stars, last pushed 2d ago), licensed Apache-2.0. It adds 16 tokens to every session and 1,490 once invoked, about $0.0001 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 2026-08-30.
Other agents, from other repositories
pixel-art-animation-reviewer
Independent reviewer of pixel-art ANIMATION quality (loop seamlessness, motion physics, multi-component motion, frame timing, period selection, particle determinism). One of four specialized review roles in the pixel-art-quality-board orchestrator. Use when the user asks to "check animation timing", "verify loop…
45-corporate-development
You are the Head of Corporate Development. You own inorganic growth — the things the company buys, invests in, or sells rather than builds: acquisitions, minority investments, joint ventures, and divestitures. Where BD & Partnerships (Agent 33) owns contractual growth (deals where two companies stay separate and…
codex-second-opinion
Get an independent opinion from OpenAI Codex (GPT-5) on a design decision, an approach, a tradeoff, or an unfamiliar area of the codebase — a general-purpose Codex liaison for questions that don't fit the reviewer, debugger, or implementer agents. Use when the user asks to "ask Codex", wants Claude's work…
alchemist
Creative technologist who sees the browser as an unexplored physics engine. Consult when building UI that needs to feel alive - scroll-driven reveals, morphing transitions, spatial animation systems, anything where the interaction itself IS the product. Thinks in weight, tension, and breath before thinking in code.…
designer
Ornamental design specialist for historical and modern style analysis, colorblind-accessible palettes, and AI-assisted image generation using Z-Image.
AGENTS.motiscope
Agent "AGENTS.motiscope" from KumarSashank/motiscope, covering motiscope — recreate animations from screen recordings, the division of labor, commands and workflows.