X_IMAGE_UNSUPPORTED
Means
the built-in image pipeline cannot read or write this format
Typical cause
a request for an AVIF or HEIC variant (both need an OS codec the pinned backend: 'bun' never uses), an SVG or TIFF source, or a colour that is not hex or transparent
Fix
await transformImageBytes(bytes, { format: 'png' }) (or 'jpeg', or 'webp'), or pass an ImageTransformDriver that produces the format — meta.format names the one refused