- Support image (JPEG/PNG/GIF/WebP, max 5MB) and document uploads
- Images sent as multimodal content blocks to Claude SDK
- Documents saved to temp dir for Claude's Read tool
- Emerald capsule badges in input for attached files
- Drag-and-drop, paste, and file picker support via PromptInput
- Chat display: image thumbnails with lightbox, file cards
- Lightbox uses Radix Dialog with prev/next navigation
- File metadata embedded in message content as HTML comments
- Compatible with existing slash command badge system
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
