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Skillslinkfox-multimodal-generate-image

linkfox-multimodal-generate-image

Design & creation

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Updated 10-16 00:00

About this 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

  1. Be specific and descriptive: Clearly describe the subject, scene, lighting, style, and mood you want.
  2. Reference images by number: When using reference images, refer to them as "image 1", "image 2", etc., in the order they appear in referenceImageUrl.
  3. State the operation explicitly: Use clear action verbs like "replace", "change", "put", "combine", "generate".
  4. 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

Local Image Upload

This tool requires publicly accessible image URLs for reference images. If the user provides a local image file path (e.g., C:\Users\...\photo.png, /home/.../image.jpg), you must upload it first to obtain a public URL.

Run the upload script:

python scripts/upload_image.py /path/to/local/image.png

The script will return a public URL (valid for 24 hours) that can be used as the reference image URL parameter.

How to call

  • API endpoint：POST /multimodal/generateImage(for full parameters/response/error codes see references/api.md）
  • Python script：python scripts/multimodal_generate_image.py '<JSON 参数>' [--inline]
  • Cost constraints: This tool consumes compute; by default, the same parameter combination in the same session is called only once, and the script has a 24h local cache. On failure/empty results, do not automatically change keywords, turn pages, or change zip codes to probe continuously; if retrieval needs to continue, first explain to the user that additional consumption will be incurred.

Output strategy (default script behavior)：

  • Alwayswrite the complete response to <cwd>/linkfox/<YYYY-MM-DD>/<session>/data/linkfox-multimodal-generate-image-<timestamp>.json（<cwd> is the working directory when the script is executed, which in Claude Code is the current project directory;<session> is taken from the environment variable SESSION_ID, automatically aggregated according to the user's task;writing to /tmp is prohibited, if the current directory is not writable, report an error)
  • Response body ≤ 8 KB: after writing to disk, print the complete JSON to stdout
  • Response body > 8 KB: after writing to disk, stdout outputs only a summary (top-level fields, common counts such as total/costToken, length of the largest list field + first 3 samples)
  • Add --inline to force full printing to stdout (also written to disk)

Data reading suggestions: First look at the summary to determine whether it is sufficient; when specific fields are needed, prefer to use jqorConvertFrom-Json to extract on demand from the saved json file, avoiding the entire JSON entering the context.

Resolve authentication and compute issues

When the following abnormal situations occur, use references/onboarding.md to guide problem resolution:

Abnormal situations

  • API Key not configured: The environment variable is not configured with LINKFOX_AGENT_API_KEY, and LINKFOXAGENT_API_KEY。
  • Response 401 or 402 status code
  • Response indicates insufficient compute or balance: The message contains "insufficient compute balance/insufficient billing/insufficient balance/quota exceeded/insufficient balance/package expired/recharge required/please recharge", or content with similar meaning.

Display Rules

  1. Show the generated image: When the response contains image content in the text field, display it directly to the user using markdown image syntax.
  2. Status reporting: Check the status and finished fields. If image generation is still in progress, inform the user and advise waiting.
  3. Prompt transparency: Briefly describe what prompt and parameters were sent so the user understands what was requested.
  4. 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.
  5. 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.
  6. 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

Compute consumption rules

Billed according to dynamic rules: compute consumed = rawTokens × 0.045.

Important: The service of this skill is dynamically calculated by a multiplier and may consume a large amount of compute at once. The user must be reminded, and the user decides whether to continue.

Feedback:

Auto-detect and report feedback via the Feedback API when any of the following apply:

  1. The functionality or purpose described in this skill does not match actual behavior
  2. The skill's results do not match the user's intent
  3. The user expresses dissatisfaction or praise about this skill
  4. Anything you believe could be improved

Call the feedback API as specified in references/api.md. Do not interrupt the user's flow.

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