Nothing in the client stopped it: a message carrying images became image_url
parts and went out. Photos stayed local only because callers routed around it.
messages_to_openai, which every OpenRouter request passes through, now refuses
any image (IMAGES_STAY_LOCAL), and describe_image always errors; hybrid mode
describes photos with the local model. A caller bug now fails the turn instead
of uploading a photo.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>