muapi-youtube-thumbnail
Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.
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| 1 | |
| 2 | slug muapi-youtube-thumbnail |
| 3 | name muapi-youtube-thumbnail |
| 4 | version "1.0.0" |
| 5 | description Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed. |
| 6 | acceptLicenseTerms true |
| 7 | |
| 8 | |
| 9 | |
| 10 | # YouTube Thumbnail |
| 11 | |
| 12 | **Design a high-CTR YouTube thumbnail — striking imagery, bold text placement, and emotional face/subject if needed.** |
| 13 | |
| 14 | ## Inputs |
| 15 | |
| 16 | | Name | Type | Required | Default | Description | |
| 17 | |:---|:---|:---|:---|:---| |
| 18 | | `title` | text | yes | — | The video title or topic (e.g. "I tried 7 AI tools in 24 hours — here's what happened"). | |
| 19 | | `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"). | |
| 20 | | `subject_description` | text | no | — | Optional description of the person or subject to feature (e.g. "a surprised young man in a hoodie"). | |
| 21 | |
| 22 | |
| 23 | ## Steps |
| 24 | |
| 25 | Thumbnails are the #1 factor in YouTube CTR. Generate a single, maximum-impact 16:9 image. |
| 26 | |
| 27 | ### Phase A — Plan the composition |
| 28 | |
| 29 | Before generating, briefly reason about the best thumbnail formula for this topic: |
| 30 | **Emotion-first**: shocked/curious face if relevant + bold text = high CTR |
| 31 | **Text overlay**: 3–5 words max, high-contrast (white/yellow on dark, or vice-versa) |
| 32 | **Contrast & saturation**: thumbnails compete in a grid — they must pop |
| 33 | |
| 34 | ### Phase B — Generate the thumbnail |
| 35 | |
| 36 | Build the image generation prompt: |
| 37 | Subject: `{{subject_description}}` if provided, otherwise design an object/scene that dramatizes the topic. |
| 38 | Mood: derives from `{{channel_style}}`. |
| 39 | Composition: rule-of-thirds, subject on left or right with empty space for text. |
| 40 | Style tags: `{{channel_style}}, youtube thumbnail composition, ultra detailed, vibrant, high contrast, 16:9`. |
| 41 | Call `muapi image generate` (model=gpt-image-2-text-to-image, aspect_ratio=16:9). |
| 42 | |
| 43 | ### Phase C — Text overlay guidance |
| 44 | |
| 45 | After generation, return: |
| 46 | **Suggested overlay text**: 3–5 bold words that complement the title `{{title}}`. |
| 47 | **Text placement**: where on the canvas to position text (e.g. "bold yellow text, top-right third"). |
| 48 | **Font recommendation**: style suggestion (e.g. "Impact-style all-caps with black outline"). |
| 49 | |
| 50 | ## Notes |
| 51 | 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). |
| 52 | If the user already has a channel image or face photo in the session, use `muapi image edit` to incorporate it. |
| 53 | Suggest A/B variants only if the user asks. |
| 54 | |
| 55 | ## Trigger Keywords |
| 56 | |
| 57 | `youtube thumbnail`, `yt thumbnail`, `thumbnail`, `video thumbnail`, `youtube cover` |
| 58 | |
| 59 | |
| 60 | |
| 61 | |
| 62 | ## Notes for the Executing Agent |
| 63 | |
| 64 | 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 `MUAPI_API_KEY` is unset. |
| 65 | For model IDs without a CLI alias yet, fall back to the raw endpoint via `curl -X POST https://api.muapi.ai/api/v1/<endpoint> -H "x-api-key: $MUAPI_API_KEY" -H 'content-type: application/json' -d '{...}'` and poll with `muapi predict wait <request_id>`. |
| 66 | Substitute `{{input_name}}` placeholders with the user's actual inputs before issuing each call. |
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