BranchChatResponse

{
  "transcript": {
    "chat": {
      "id": "00000000-0000-4000-8000-000000000000",
      "title": "string",
      "private": false,
      "current_model": {
        "provider": "string",
        "requested_model": "string",
        "default_reasoning": "default"
      },
      "branched_from": {
        "chat_id": "00000000-0000-4000-8000-000000000000",
        "through_message_id": "00000000-0000-4000-8000-000000000000"
      },
      "agent_working_folder": "string",
      "agent_mode": "string",
      "agent_fast": false,
      "pinned_at": 0,
      "profile_id": "00000000-0000-4000-8000-000000000000",
      "created_at": 0,
      "updated_at": 0
    },
    "tool_policy": {
      "chat_id": "00000000-0000-4000-8000-000000000000",
      "mode": "manual",
      "workspace_ids": [
        "00000000-0000-4000-8000-000000000000"
      ]
    },
    "tool_activities": [],
    "notices": [
      {
        "id": "00000000-0000-4000-8000-000000000000",
        "attempt_id": "00000000-0000-4000-8000-000000000000",
        "chat_id": "00000000-0000-4000-8000-000000000000",
        "assistant_message_id": "00000000-0000-4000-8000-000000000000",
        "text": "string",
        "text_offset": 0,
        "created_at": 0
      }
    ],
    "messages": [
      {
        "id": "00000000-0000-4000-8000-000000000000",
        "chat_id": "00000000-0000-4000-8000-000000000000",
        "ordinal": 0,
        "role": "user",
        "state": "pending",
        "markdown": "string",
        "origin_message_id": "00000000-0000-4000-8000-000000000000",
        "provider": "string",
        "requested_model": "string",
        "resolved_model": "string",
        "error_class": "configuration",
        "created_at": 0,
        "completed_at": 0
      }
    ],
    "blocks": [
      {
        "id": "00000000-0000-4000-8000-000000000000",
        "message_id": "00000000-0000-4000-8000-000000000000",
        "ordinal": 0,
        "kind": "paragraph",
        "markdown": "string",
        "plain_text": "string"
      }
    ],
    "pinned_documents": [
      {
        "chat_id": "00000000-0000-4000-8000-000000000000",
        "document_id": "00000000-0000-4000-8000-000000000000",
        "display_title": "string",
        "pinned": false,
        "first_used_at": 0,
        "last_used_at": 0
      }
    ],
    "feedback": [],
    "usage": [],
    "sources": [],
    "reasoning_control": {
      "kind": "unsupported"
    },
    "agent_commands": [
      {
        "name": "string",
        "description": "string",
        "display_name": "string",
        "kind": "command",
        "input_hint": "string"
      }
    ],
    "attachments": []
  }
}