muapi-youtube-thumbnail skill

by SamurAIGPT·SamurAIGPT/Generative-Media-Skills·4.3k stars·MIT

Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.

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Install the muapi-youtube-thumbnail skill

A skill is a folder. Copy it into your agent's skills folder and the agent loads it when the task matches its description.

git clone --depth 1 https://github.com/SamurAIGPT/Generative-Media-Skills.git /tmp/Generative-Media-Skills
mkdir -p ~/.claude/skills
cp -r /tmp/Generative-Media-Skills/library/visual/youtube-thumbnail ~/.claude/skills/muapi-youtube-thumbnail

available in every project

In the Claude apps, zip the folder and upload it from the Skills settings. The folder on GitHub

The instructions your agent would load

SKILL.md as published, without the frontmatter. Read it on GitHub

YouTube Thumbnail

Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.

Inputs

Steps

Thumbnails are the #1 factor in YouTube CTR. Generate a single, maximum-impact 16:9 image.

Phase A — Plan the composition

Before generating, briefly reason about the best thumbnail formula for this topic:

Emotion-first: shocked/curious face if relevant + bold text = high CTR
Text overlay: 3–5 words max, high-contrast (white/yellow on dark, or vice-versa)
Contrast & saturation: thumbnails compete in a grid — they must pop

Phase B — Generate the thumbnail

Build the image generation prompt:

Subject: {{subject_description}} if provided, otherwise design an object/scene that dramatizes the topic.
Mood: derives from {{channel_style}}.
Composition: rule-of-thirds, subject on left or right with empty space for text.
Style tags: {{channel_style}}, youtube thumbnail composition, ultra detailed, vibrant, high contrast, 16:9.

Call muapi image generate (model=gpt-image-2-text-to-image, aspect_ratio=16:9).

Phase C — Text overlay guidance

After generation, return:

Suggested overlay text: 3–5 bold words that complement the title {{title}}.
Text placement: where on the canvas to position text (e.g. "bold yellow text, top-right third").
Font recommendation: style suggestion (e.g. "Impact-style all-caps with black outline").

Notes

Never put too much text in the prompt — text rendering in image models is unreliable. Guide the user on adding text in post-production (Canva, Photoshop).
If the user already has a channel image or face photo in the session, use muapi image edit to incorporate it.
Suggest A/B variants only if the user asks.

Trigger Keywords

youtube thumbnail, yt thumbnail, thumbnail, video thumbnail, youtube cover

Notes for the Executing Agent

This recipe is LLM-orchestrated: read each phase, gather any missing inputs from the user, then call muapi CLI commands. Use muapi auth configure first if MUAPIAPIKEY is unset.
For model IDs without a CLI alias yet, fall back to the raw endpoint via curl -X POST https://api.muapi.ai/api/v1/ -H "x-api-key: $MUAPIAPIKEY" -H 'content-type: application/json' -d '{...}' and poll with muapi predict wait .
Substitute {{input_name}} placeholders with the user's actual inputs before issuing each call.

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