Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SDKArea: what it touches
Internal ChangesKind: in v2.1.265,
Internal ChangesSection of the release
What
The schema for user-role messages used by the Claude Code SDK now accepts an optional file_attachments array. Each entry can include file_uuid, file_name, is_image, sha256, and file_size, matching the shape already used by SDKUserMessageReplay.
Why
This appears intended for remote clients that need to attach files to a prompt, giving them a defined structure for describing attached files alongside a message.
