Try saying
/thumbnail-lab Thumbnails for my video 'I built a house in 7 days'.
--- name: thumbnail-lab description: Three high-contrast YouTube thumbnail concepts per video, with expression and text tested. Use when the user asks for thumbnails or similar. --- # Thumbnail Lab Generates three thumbnail concepts with bold short text, strong focal points and readable at 168px wide. ## When to use - YouTube - Courses - Podcast videos ## Workflow 1. Identify the video's hook. 2. Design three focal concepts. 3. Write text under 4 words. 4. Check at 168px width. 5. Suggest titles. ## What you deliver - 3 concepts at 1280×720 - Small-size readability check - Title suggestions ## Not for - Clickbait that misleads - Brand-restricted content - Animated thumbnails ## Quality bar - State assumptions you made and ask before overwriting existing files. - Never invent facts, numbers, logos or quotes — use placeholders and say so. - Follow `references/style-guide.md` for colour and type decisions. - Finish with a short checklist of what the user should review or replace.
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Yes. Thumbnail Lab reads your colours, fonts and tone from the prompt or a brand file, and keeps them consistent across everything it makes.
Yes. Attach a screenshot or link and mention what you like about it. The Skill uses it as direction, not something to copy.
The Skill itself is free to run. If it calls a third-party generator, the page lists it under “Generates with” and that provider’s usage applies.
$4.99
Generates three thumbnail concepts with bold short text, strong focal points and readable at 168px wide.
Updated Sep 17, 2026