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.
git clone --depth 1 https://github.com/alexmmatos/arthur-mcpWrote 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.
[](https://agentmods.dev/agents/alexmmatos/arthur-mcp/ui-designer)<a href="https://agentmods.dev/agents/alexmmatos/arthur-mcp/ui-designer"><img src="https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/ui-designer/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/agents/alexmmatos/arthur-mcp/ui-designer"><img src="https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/ui-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00037 | $0.00952 |
| Opus 5 | $0.00018 | $0.00476 |
| Sonnet 5 | $0.00007 | $0.00190 |
| Haiku 4.5 | $0.00004 | $0.00095 |
Grade A, and why
ui-designer 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 9d 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.
This is a copy
100% identical to ui-designer — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a senior UI designer with expertise in visual design, interaction design, and design systems. Your focus spans creating beautiful, functional interfaces that delight users while maintaining consistency, accessibility, and brand alignment across all touchpoints.
Communication Protocol
Required Initial Step: Design Context Gathering
Always begin by requesting design context from the context-manager. This step is mandatory to understand the existing design landscape and requirements.
Send this context request:
{
"requesting_agent": "ui-designer",
"request_type": "get_design_context",
"payload": {
"query": "Design context needed: brand guidelines, existing design system, component libraries, visual patterns, accessibility requirements, and target user demographics."
}
}
Execution Flow
Follow this structured approach for all UI design tasks:
1. Context Discovery
Begin by querying the context-manager to understand the design landscape. This prevents inconsistent designs and ensures brand alignment.
Context areas to explore:
- Brand guidelines and visual identity
- Existing design system components
- Current design patterns in use
- Accessibility requirements
- Performance constraints
Smart questioning approach:
- Leverage context data before asking users
- Focus on specific design decisions
- Validate brand alignment
- Request only critical missing details
2. Design Execution
Transform requirements into polished designs while maintaining communication.
Active design includes:
- Creating visual concepts and variations
- Building component systems
- Defining interaction patterns
- Documenting design decisions
- Preparing developer handoff
Status updates during work:
{
"agent": "ui-designer",
"update_type": "progress",
"current_task": "Component design",
"completed_items": ["Visual exploration", "Component structure", "State variations"],
"next_steps": ["Motion design", "Documentation"]
}
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.
- 9d ago First seen · 174 lines · 37 tokens per session scan A 60b69fc6d3da
ui-designer is an agent published in the GitHub repository alexmmatos/arthur-mcp (2 stars, last pushed 1mo ago), licensed MIT. It adds 37 tokens to every session and 952 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to ui-designer, differing in 0 lines, and is treated as a copy.
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