thumbnail-design

Generates and iterates YouTube thumbnail designs with style templates, user photos, and text overlays.

3|Updated Apr 23, 2026
One-click install
npx skills add https://github.com/gilinachum/youtube-storyteller --skill thumbnail-design-gilinachum
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: thumbnail-design
Source: https://github.com/gilinachum/youtube-storyteller/tree/main/agent/knowledge/thumbnail-design
Command: npx skills add https://github.com/gilinachum/youtube-storyteller --skill thumbnail-design-gilinachum

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Creating click-worthy YouTube thumbnails requires design expertise and many manual iterations. This Skill guides an AI agent through a structured concept-to-generation workflow so creators can produce 1280x720 thumbnails optimized for click-through rate without design tools. ## Core Features & Use Cases - Concept-first workflow: Proposes composition, text overlay, color scheme, and mood, then gets user approval before generating to save API calls. - Iterative refinement: Maintains conversation context across generations so feedback like "make the text bigger" or "more dramatic" applies to previous iterations. - Style templates and user photos: Matches existing channel branding, series templates, and uses uploaded personal photos as face/appearance references. - Use Case: A Hebrew-speaking YouTuber asks for a thumbnail for a new video, approves a concept with a close-up expressive face and 3-word high-contrast text overlay, then iterates twice on colors before finalizing. ## Quick Start Ask the agent to design a YouTube thumbnail for your video topic and approve the proposed concept before it generates the image.

Frequently Asked Questions about thumbnail-design

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I create a YouTube thumbnail with AI?▼

Describe your video topic and the emotion to convey. The agent proposes a concept covering the main visual, text overlay, colors, and composition, then generates the thumbnail with the design_thumbnail tool after you approve the concept.

How do I iterate on a generated thumbnail design?▼

Give feedback in natural language, such as asking for bigger text, different colors, or a more dramatic expression. The tool preserves conversation context, so each refinement builds on the previous generation instead of starting over.

Can I use my own photos in a YouTube thumbnail?▼

Yes. Upload personal photos and the generation uses your face and appearance as a reference, matching your typical presentation style. Your likeness can be combined with different backgrounds and effects.

What size and format should a YouTube thumbnail be?▼

YouTube thumbnails should be 1280x720 pixels at a 16:9 ratio. Text should be limited to about five words and remain readable on phone screens, with high-contrast saturated colors to stand out in the feed.

Can the thumbnail match my channel's existing style?▼

Yes. If you upload style templates or reference a previous thumbnail, the agent analyzes its colors, fonts, and layout patterns and matches them. Series videos can reuse the same template with different text and subjects.