Download Session Object - BlobHub

Download an object from the session storage.

POST `/revisions/:id/data/query` (Command: `download_session_object`)

Request Body

Parameter	Type	Required	Description
`engine`	string	Yes	Must be `workflow_blobhub`.
`command`	string	Yes	Must be `download_session_object`.
`session_id`	string	Yes	The ID of the session.
`alias`	string	Yes	Alias of the object to download.

Response

Parameter	Type	Description
`object`	object	The retrieved object’s envelope.

The envelope, not the bare value: revision_id, session_id, alias and updated_at sit alongside the stored value. Everything the notes below say about object.value reads out of that key.

When object.value.type is "thread", the returned envelope contains only attributes and metadata. Items are fetched separately via list_session_thread_items / get_session_thread_item.

When object.value.type is "graph", the returned envelope contains only attributes and metadata. Elements are fetched separately via the six graph commands. See the graph session object for the element schema.

Example

{
  "engine": "workflow_blobhub",
  "command": "download_session_object",
  "session_id": "sess_001",
  "alias": "config"
}

{
  "status": "success",
  "object": {
    "revision_id": "rev_001",
    "session_id": "sess_001",
    "alias": "config",
    "updated_at": "2026-07-12T10:00:00.000000Z",
    "value": { "debug": true }
  }
}