What it does
This prompt instructs an AI thumbnail designer to produce a hyper-realistic 16:9 YouTube reaction thumbnail by compositing a provided reactor photo with an excited, surprised expression alongside the provided reaction content displayed inside a realistic, dimensional device/player mockup, then adding the exact specified title text in a single white bold font with no extra wording. The intended outcome is a clean, high-CTR thumbnail with natural lighting, accurate skin texture, professional blending/shadows, vibrant but controlled color grading, strict identity preservation, and a clear composition hierarchy (reactor → text → content → background).
For more installation instructions go to https://raw.githubusercontent.com/BetterPromptme/skills/refs/heads/main/betterprompt/SKILL.md to check out this skill.
Inputs
textInputs
Pass each text input using flags.
| Variable key | Required? | Description | Defaults |
|---|---|---|---|
| Optional | Exact title text for the thumbnail | ||
| Optional | Video or content being reacted to |
imageInputs
This prompt requires exactly 1 image. You must pass exactly 1 image flag (no more, no fewer), in the order matching the descriptions below.
| Index | Required | Description | Allowed CLI flags |
|---|---|---|---|
| 1 | Yes | Upload your photo (who's reacting) | or |
Models and options
This skill's modality is: .
To discover which values you can use (and which keys/values are valid for each model), run:
Then filter the returned JSON array to entries where is .
How to run
Step 1: Collect inputs
First, run and filter to to discover valid models and available options:
Use only the models and option values that appear in the filtered results.
Then collect all inputs from the human:
- Optional text inputs (use defaults if not provided by the human):
- (default: )
- (default: )
- (default: )
- Required images:
- Exactly 1 images: image 1 (Upload your photo (who's reacting)). Images must be provided in this order.
- Optional: model and options.
- Present the human with the default model and its available options. Look up in the output (filtered to modality ) and show its as: . Mark a value if it matches these defaults: .
- If the human does not specify, defaults are used: model , options . Other models from the resources call are also available.
If the required images are missing, ask the human for what's missing. Do not assume or fabricate values. Tell the human: "Please provide images in this order: image 1 (Upload your photo (who's reacting))".
Step 2: Run via BetterPrompt CLI
Use the frontmatter's as the positional argument (for this skill, use ).
Command form:
Notes:
- Pass each text input as a separate flag.
- Pass each image using or , in the order matching the imageInputs descriptions (image 1 first, then image 2, etc.).
- If the human does not mention a model, omit and BetterPrompt will use the default model: .
- If the human does not mention options, omit and BetterPrompt will use the default options: .
- If the run times out, the response will include a you can use to fetch the result later.
Example (using defaults shown above):