muapi-youtube-thumbnail

# YouTube Thumbnail **Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.** ## Inputs | Name | Type | Required | Default | Description | |:---|:---|:---|:---|:---| | `title` | text | yes | — | The video title or topic (e.g. "I tried 7 AI tools in 24 hours — here's what happened"). | | `channel_style` | text | no | bold, high contrast, bright colors, clean design, YouTube tech aesthetic | Channel brand style (e.g. "dark moody gaming", "bright educational", "minimal corporate"). | | `subject_description` | text | no | — | Optional description of the person or subject to feature (e.g. "a surprised young man in a hoodie"). | ## 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 1. 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: `{{cha...