Thumbnail Brief Generator
Generate a specific thumbnail brief a designer can execute in 20 min. Concept, layout, expression, contrast, text.
Before & after
Same prompt, same agent — the only difference is the skill.
I can help you create a brief for your designer. You'd want to describe the visual concept you have in mind, the layout, and maybe some reference thumbnails if possible. You should tell them what text, if any, should be on the thumbnail and where it should go. If there's a face involved, describe the expression or emotion you want. You might also want to give them color or contrast preferences to make it stand out. References from successful creators in your niche could be helpful so they understand the style. It would be useful to know your channel's niche and the style you're going for. Do you have any successful thumbnails from your channel or others that you'd like the designer to look at?
THUMBNAIL BRIEF — "THE PRODUCTIVITY HACK" VIDEO CONCEPT (1 sentence) Two-panel comparison: left side messy desk with scattered notes (chaos), right side clean desk with organized digital tool (clarity), split by sharp vertical line. LAYOUT SPEC • Subject placement: Split-screen, left 40% chaos, right 60% clarity • Focal point: Right panel gets bright color (see contrast strategy) • Negative space: Small 10% margin on all sides EXPRESSION (if face shown) Confused/frustrated on left side (furrowed brow, frown), relieved/satisfied on right (slight smile, raised eyebrows) CONTRAST STRATEGY • Left side: Muted grays, browns, desaturated chaos • Right side: High-saturation teal/green for the tool element, cream background • Dividing line: Stark black 4-pixel separator TEXT ON THUMBNAIL Left: "I'm a mess" (white, 24pt, Poppins Bold, bottom-left) Right: "GAME CHANGER" (white, 32pt, Poppins Black, top-right) Both: Simple, 2-3 words max per side REFERENCE THUMBNAILS (what to steal from each) • Ref 1 (Ali Abdaal): Two-panel split structure, high contrast colors • Ref 2 (Thomas Frank): Bold sans-serif type treatment, faces show emotion • Ref 3 (Keep Productive): Muted left, saturated right (your exact vibe) DESIGNER TIMELINE: 20 min from brief to PSD.
About this skill
name: thumbnail-brief description: Generate a specific thumbnail brief a designer can execute in 20 min. Concept, layout, expression, contrast, text. Use when working on thumbnail brief generator.
Thumbnail Brief Generator
Most thumbnail feedback is "make it pop." This skill generates a specific brief: the visual concept, the layout, the facial expression (if a face is used), the contrast strategy, the text (if any) and its placement, and 2-3 references from top-performing channels in your niche. A designer can execute it in 20 min. Use it before you brief a designer or before you sit down in Photoshop yourself.
What you get
- Concept statement in one sentence
- Layout spec (subject placement, focal point, negative space)
- Facial-expression direction (if a face is used)
- Contrast and color strategy
- Text specification (words, font style, placement, size)
- 2-3 reference thumbnails with what to steal from each
Customize your output
- Channel niche: Tech, Business, Lifestyle, Education, Entertainment, Other
- Style: Minimal, Maximalist, Editorial, Meme-adjacent
- Text on thumbnail: None, 1-3 words, 4-7 words
- Face on thumbnail: Required, Optional, No
- Reference count: 2, 3, 5
Example output
"Concept: 'the split-screen test'. Layout: 2 halves, left labeled 'what everyone does', right labeled 'what actually works'. Expression: raised eyebrow, mouth slightly open. Text: 3 words max, bottom-right. References: [3 thumbnails from your niche]. steal the color contrast from #1, the layout from #2."
Best for
YouTubers, video creators without a designer, agencies producing YouTube content, creators who want repeatable packaging.
Note: channel scrape (source doc inaccessible; verify against original iMessage videos)
SKILL.md preview
---
name: thumbnail-brief
description: Use this skill before briefing a designer or opening Photoshop to generate a specific, executable YouTube thumbnail brief instead of vague "make it pop" feedback.
version: 1.0.0
category: YouTube / Packaging
author: AgentVolt
license: proprietary
tags:
- youtube
- packaging
- standard
---
# Thumbnail Brief Generator
Generates a concrete thumbnail brief — concept, layout, expression, contrast strategy, and text placement — a designer can execute in about 20 minutes.
## When to use
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