Does this require external tools?

Yes, it utilizes the inference.sh CLI to generate AI images directly through your terminal workflow using models like Flux or Seedream.

What are the recommended dimensions for thumbnails?

The skill recommends a minimum of 1280x720 px, though 1920x1080 px (16:9 aspect ratio) is preferred for high-quality displays.

Why should I avoid placing text in the bottom-right corner?

YouTube overlays a video duration timestamp in the bottom-right corner, which can obscure any text or critical visual elements placed in that area.

How does this skill help with YouTube CTR?

It applies psychological triggers, high-contrast color schemes, and mobile legibility tests to ensure your thumbnails stand out and encourage clicks in the YouTube feed.

Can I use this for A/B testing?

Absolutely. The skill includes specific prompts and workflows to generate multiple visual variants (e.g., different background colors or facial expressions) for side-by-side performance testing.

YouTube Thumbnail Designer

Name: YouTube Thumbnail Designer
Author: JantonioFC

byJantonioFC

•

マーケティングオートメーション

Generates high-CTR YouTube thumbnails using AI image generation, color psychology, and mobile-optimized design principles.

The YouTube Thumbnail Designer skill automates the creation of high-performing video cover images by integrating Claude Code with the inference.sh CLI. It provides comprehensive guidelines for dimensions, safe zones, and contrast ratios while leveraging face expression psychology and A/B testing strategies to maximize click-through rates. This skill ensures your visuals remain legible at mobile sizes (the 120px test) and follow best practices for text placement, color theory, and focal points to help your content stand out in a crowded feed.

主な機能

012 GitHub stars

02AI-powered image generation via inference.sh integration

03Automated A/B testing workflows for visual variants

04Mobile-first optimization with the 120px legibility test

05High-contrast color strategy and text placement safe zones

06Psychology-backed facial expression and composition rules

ユースケース

01Creating before/after or product comparison visuals for reviews

02Generating high-CTR thumbnails for educational or tech tutorials

03Optimizing video cover images for mobile viewing and search visibility

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jantoniofc/skillsbank youtube-thumbnail-design

For use in Claude.ai and ChatGPT

主な機能

012 GitHub stars

02AI-powered image generation via inference.sh integration

03Automated A/B testing workflows for visual variants

04Mobile-first optimization with the 120px legibility test

05High-contrast color strategy and text placement safe zones

06Psychology-backed facial expression and composition rules

ユースケース

01Creating before/after or product comparison visuals for reviews

02Generating high-CTR thumbnails for educational or tech tutorials

03Optimizing video cover images for mobile viewing and search visibility

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jantoniofc/skillsbank youtube-thumbnail-design

For use in Claude.ai and ChatGPT