Description

When an SVG file is uploaded and used in a generation, the system throws an error:

UnknownError: Unsupported MIME type: image/svg+xml

Root Cause

In packages/giselle/src/generations/internal/use-generation-executor.ts:570, image/svg+xml is treated as an ImagePart and sent to the LLM provider. However, none of the major LLM providers support SVG format for vision/image input.

Supported Image Formats by Provider

References

• OpenAI - Images and vision
• Anthropic - Vision
• Google - Image understanding

Proposed Solutions

1. Remove SVG from ImagePart handling - Treat SVG as unsupported and log a warning (simplest)
2. Convert SVG to raster format - Server-side conversion to PNG before sending to LLM
3. Treat SVG as text - Since SVG is XML, it could potentially be sent as text content

Current Code

switch (fileParameter.type) {
  case "image/jpeg":
  case "image/png":
  case "image/gif":
  case "image/svg+xml":  // <- This should not be treated as ImagePart
    return {
      type: "image",
      image: blob,
    } as ImagePart;