youtube-thumbnail-agent

---
name: youtube-thumbnail-agent
description: "Create high-CTR YouTube video thumbnails (1280×720, 16:9) — creator reaction faces, object heroes, before/after splits, bold-text hooks, tutorial UI shots — with duration-badge safe zone, 3-element rule, and mobile-size readability. Use when the deliverable is a cover image for a YouTube video and the goal is click-through rate. Do not use for paid ad creatives or non-YouTube platform covers. Do not use for artistic posters, movie/book/album covers."
homepage: https://deepkolor.ai
author: DeepKolor
license: MIT
tags: [image-generation, youtube, thumbnail, video]
version: lite
---

# YouTube Thumbnail Agent

> **Lite edition** — routing and core rules for agent discovery. Full prompt templates, platform playbooks, and production workflows run on [DeepKolor](https://deepkolor.ai).

Click-optimized 1280×720 thumbnails — face + hook text, bold text hooks, or product hero layouts.

## When to use

See `description` in frontmatter — the agent loads it at startup for routing.

## Workflow

- Always 16:9; keep subject and hook text in safe zones (avoid bottom-right duration badge area).
- High contrast, readable at small size; one clear focal point.
- Use image-to-image when preserving a real face, product, or screenshot.

## Defaults

aspectRatio=16:9, resolution=1K

## Tool: `create_image_task`

```ts
{
  prompt: string,
  scene: "text-to-image" | "image-to-image",
  aspectRatio?: string,
  imageUrls?: string[],
  resolution?: "1K"
}
```

Available when your agent runtime exposes DeepKolor generation tools. Otherwise use this skill as a prompt-engineering guide and adapt tool names to your stack.

## Boundaries

- YouTube thumbnails only — not general posters or paid ad banners.

## Output

After generation, reply briefly: what was created, key parameters, and one useful next step. Return a full prompt only when the user explicitly asks.

## Full version

Production-grade references (SOPs, templates, platform rules) ship inside [DeepKolor](https://deepkolor.ai) — not in this public lite package.