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 skills add ihatesea69/HieuNghi-AI-Skills --skill thumbnail-generatorgit clone --depth 1 https://github.com/ihatesea69/HieuNghi-AI-SkillsWrote 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/skills/ihatesea69/hieunghi-ai-skills/thumbnail-generator)<a href="https://agentmods.dev/skills/ihatesea69/hieunghi-ai-skills/thumbnail-generator"><img src="https://agentmods.dev/badge/skills/ihatesea69/hieunghi-ai-skills/thumbnail-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/skills/ihatesea69/hieunghi-ai-skills/thumbnail-generator"><img src="https://agentmods.dev/badge/skills/ihatesea69/hieunghi-ai-skills/thumbnail-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 | $0.00044 | $0.01108 |
| Opus 5 | $0.00022 | $0.00554 |
| Sonnet 5 | $0.00009 | $0.00222 |
| Haiku 4.5 | $0.00004 | $0.00111 |
Grade A, and why
thumbnail-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 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.
How it starts
The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
🎨 Thumbnail Generator for dev.to Blog
This skill helps generate prompts for AI image generators to create thumbnail/cover images for dev.to blog posts.
📐 Technical Specifications
- Size: 1000x420 pixels (aspect ratio 2.38:1 - optimized for dev.to)
- Style: Hand-drawn infographic on notebook/whiteboard
- Output Format: Text prompt for AI image generators (Midjourney, DALL-E, Stable Diffusion, etc.)
🎯 When to Use
- Creating cover images for new dev.to articles
- Maintaining consistent branding with "Nghi Danh AI Content Creator"
- Need professional hand-drawn style illustrations
📝 Standard Prompt Template
Generate one single image of a physical, hand-drawn infographic on a large white notebook page or whiteboard.
**Topic/Title**: [ARTICLE TITLE]
**Style & Medium (Very Important)**:
- The image must look like a real photograph of an actual notebook page or whiteboard
- All content must appear hand-drawn using colored marker pens (black, blue, red, green) and highlighters (yellow, orange)
- Lines should be slightly imperfect, wobbly, and show natural ink texture on the surface
- No digital or printed appearance
**Text Rules**:
- No digital fonts
- All text, titles, and bullet points must look handwritten or hand-printed with pencil
- Handwriting should be clear, large, and easy to read, but naturally imperfect
**Key Visual Elements**:
[LIST 3-5 ICONS/ILLUSTRATIONS FOR THE TOPIC]
**Layout & Resolution**:
- Image size: 1000x420
- Structure the layout like a well-organized infographic
- Use multiple colors to highlight key sections
- Overall style must feel organic, casual, and realistic, as if drawn by hand
**Final Mandatory Text (Bottom of the Page)**:
Include the following handwritten sentence at the bottom of the image, in the same hand-drawn marker style:
"Follow Nghi Danh AI Content Creator for more helpful content"
🔄 Thumbnail Creation Process
Step 1: Analyze the Article
- Identify the main topic
- List 3-5 important keywords
- Choose 3-5 relevant icons/symbols
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 127 lines · 44 tokens per session scan A 5fb8575a662c
thumbnail-generator is a skill published in the GitHub repository ihatesea69/HieuNghi-AI-Skills (3 stars, last pushed 6mo ago), licensed MIT. It adds 44 tokens to every session and 1,108 once invoked, about $0.0002 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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