Ecommerce Multimodal Generate Image Agent Skill

AI Image Generation

This skill guides you on how to generate and edit images using the AI image generation service, helping users create high-quality product images, modify existing images, and perform creative visual transformations.

Core Concepts

The AI Image Generation tool produces new images based on a text prompt and optional reference images. It supports a wide range of use cases:

• Text-to-image: Generate a brand-new image purely from a text description.
• Image-to-image: Provide one or more reference images and a prompt to generate a new image that preserves elements from the references.
• Image editing: Modify specific elements, colors, backgrounds, or styles in an existing image.
• Product compositing: Place a product from one image into a scene from another image.
• Model swapping: Replace the model or mannequin in a product photo.

Reference images are strongly recommended when the user wants the output to closely resemble an existing product or scene. Up to 3 reference image URLs can be provided, separated by commas.

Parameter Guide

| Parameter | Required | Description | Default |

|-----------|----------|-------------|---------|

| prompt | Yes | Text description of the desired image. Supports text-to-image, image-to-image, editing, model swapping, and more. Max 1000 characters. | -- |

| referenceImageUrl | No | URL(s) of reference image(s). Separate multiple URLs with commas. Up to 3 images supported. Max 1000 characters. | -- |

| aspectRatio | No | Aspect ratio of the output image. | 1:1 |

Supported Aspect Ratios

| Value | Description |

|-------|-------------|

| 1:1 | Square (default) |

| 3:4 | Portrait |

| 4:3 | Landscape |

| 9:16 | Vertical fullscreen |

| 16:9 | Horizontal fullscreen |

Prompt Writing Tips

• Be specific and descriptive: Clearly describe the subject, scene, lighting, style, and mood you want.
• Reference images by number: When using reference images, refer to them as "image 1," "image 2," etc., in the order they appear in referenceImageUrl.
• State the operation explicitly: Use clear action verbs like "replace," "change," "put," "combine," "generate."
• Keep within 1000 characters: Prompts have a maximum length of 1000 characters.

Prompt Examples by Scenario

Object replacement:

Replace the vase on the table in image 1 with a potted plant

Background color change:

Change the background color of image 1 to pure white

Product compositing:

Place the product from image 2 onto the marble countertop in image 1

Style transfer:

Transform image 1 into the artistic style shown in image 2

Text-to-image (no reference):

A professional product photo of a sleek black wireless headphone on a gradient blue background, studio lighting, 8K quality

Model swapping:

Replace the model in image 1 with a different model while keeping the same clothing and pose

Usage

• API Endpoint: POST /multimodal/generateImage (see references/api.md for full parameters, responses, and error codes)
• Python Script: python scripts/multimodal_generate_image.py '<JSON parameters>'

Output strategy (script default behavior):

• Prints the full JSON response to stdout

Data reading tip: Use jq or ConvertFrom-Json to extract specific fields from the response as needed.

Display Rules

• Show the generated image: When the response contains image content in the text field, display it directly to the user using markdown image syntax.
• Status reporting: Check the status and finished fields. If image generation is still in progress, inform the user and advise waiting.
• Prompt transparency: Briefly describe what prompt and parameters were sent so the user understands what was requested.
• Aspect ratio confirmation: If the user does not specify dimensions, use the default 1:1 ratio but mention it so they can request a different ratio if needed.
• Reference image guidance: If the user wants a result close to an existing image but did not provide a reference URL, proactively suggest they provide one for better fidelity.
• Error handling: When generation fails, explain the issue based on the response status field and suggest adjustments (e.g., simplify the prompt, check reference image URLs, try a different aspect ratio).

Important Limitations

• Reference image limit: A maximum of 3 reference image URLs can be provided per request.
• Prompt length: The prompt must not exceed 1000 characters.
• URL validity: Reference image URLs must be publicly accessible. Private or expired URLs will cause failures.
• Aspect ratio options: Only 1:1, 3:4, 4:3, 9:16, and 16:9 are supported.

User Expression & Scenario Quick Reference

Applicable -- Requests involving image generation or editing:

| User Says | Scenario |

|-----------|----------|

| "Generate an image," "Create a picture" | Text-to-image generation |

| "Edit this photo," "Modify the image" | Image editing |

| "Change the background," "Make it white background" | Background replacement |

| "Put the product on this scene" | Product compositing |

| "Make it look like this style" | Style transfer |

| "Swap the model," "Change the person" | Model swapping |

| "Create a product photo" | Product image generation |

| "Make a vertical/landscape version" | Aspect ratio adjustment |

Not applicable -- Needs beyond image generation:

• Image analysis or recognition (reading text from images, identifying objects)
• Video generation or editing
• Image file format conversion
• Batch processing of hundreds of images
• Image hosting or storage

Authentication

Set NEXSCOPE_API_KEY. Visit https://www.nexscope.ai/help/skills-external-access?co-from=skillNS to manage credits.