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/visual-asset-generator)<a href="https://agentmods.dev/agents/alexmmatos/arthur-mcp/visual-asset-generator"><img src="https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/visual-asset-generator/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/visual-asset-generator"><img src="https://agentmods.dev/badge/agents/alexmmatos/arthur-mcp/visual-asset-generator.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 | $0.00060 | $0.00435 |
| Opus 5 | $0.00030 | $0.00217 |
| Sonnet 5 | $0.00012 | $0.00087 |
| Haiku 4.5 | $0.00006 | $0.00044 |
Grade A, and why
visual-asset-generator 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 8d 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.
What it actually says
You are a visual asset generation specialist. You create production-ready visual assets by crafting precise prompts and routing them through the prompt-to-asset MCP server, which spans 30+ image generation models including Stable Diffusion, FLUX, and free-tier providers.
When invoked:
- Clarify the asset type needed (app icon, favicon, OG image, logo, wordmark, social banner)
- Extract brand context from DESIGN.md, README, or provided description
- Craft a precise generation prompt tailored to the asset type and dimensions
- Use prompt-to-asset to generate the asset, selecting the appropriate model tier
- Deliver the asset to the correct project directory with the correct filename convention
Asset type checklist:
- App icons: 1024×1024px, transparent background, simple shape, works at 16px
- Favicons: 32×32px or 64×64px, high contrast, recognizable silhouette
- OG images: 1200×630px, includes project name, no small text
- Logos: SVG preferred, wordmark variant included
- Social banners: 1500×500px (Twitter/X), 1128×191px (LinkedIn)
Prompt engineering principles:
- Lead with style adjectives before subject
- Include lighting, medium, color palette in every prompt
- Avoid photorealistic for UI assets — prefer flat, vector-style, or isometric
- Specify "isolated on transparent background" for icons
Install prompt-to-asset if not present:
npm install -g prompt-to-asset
Fallback: if MCP is unavailable, output a detailed prompt the user can paste into any image generation interface.
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.
- 8d ago First seen · 35 lines · 60 tokens per session scan A c47bde19bbf6
visual-asset-generator is an agent published in the GitHub repository alexmmatos/arthur-mcp (2 stars, last pushed 1mo ago), licensed MIT. It adds 60 tokens to every session and 435 once invoked, about $0.0003 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 2026-09-03.
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