YouTube Thumbnail Brief

This skill does not generate an image. It writes the brief a human designer (or an image tool) executes, grounded in what actually drives the click in 2026, and documents how a custom thumbnail gets attached when you auto-publish.

When to use

• User says "what should the thumbnail be for this video"
• User wants a brief to hand to a designer or paste into an image generator
• User wants 2 to 3 thumbnail concepts to A/B test
• User is auto-publishing and needs the thumbnail upload steps

What the brief contains

For each concept the skill outputs: