What problem does this solve?

I can not attach files to the image generation prompt. It prevents me to use files as part of the prompt context, or to suggest image styles to follow.

When asking to generate an image:

RubyLLM.paint("Generate a happy birthday postcard")

I would like to attach reference files and images:

RubyLLM.paint("Generate a happy birthday postcard, use the person in the attached file", with: "myfriend.png")
RubyLLM.paint("Generate a cover image from the article I am attaching, with: "article.pdf")
RubyLLM.paint("Generate an illustration of a dog following the style of the attached images, with: ["illustration1.png", "illustration2.png"])

Proposed solution

Support the with param, like in the ask method

Why this belongs in RubyLLM

It is common use for all image generators to allow files and reference images in the prompt.