OptionalartifactArtifact Version ID (for artifact references, used to create ConversationDetailArtifact)
Base64 data URL for display
Original File object (null for artifact references)
OptionalfileMJStorage File ID (for artifact references, mutually exclusive with inline data)
Original filename
OptionalheightHeight in pixels (for images)
Local ID for tracking
MIME type
File size in bytes
OptionalsourceSource of the attachment
OptionalthumbnailSmall thumbnail URL for preview
OptionalwidthWidth in pixels (for images)
Represents a pending attachment that hasn't been uploaded yet