Start an agent chat on a project (and optionally a branch) with an opening message

A valid request URL is required to generate request examples

{
  "ai_model": "<string>",
  "archived": true,
  "branch_id": "<string>",
  "config_id": "<string>",
  "context_usage": {
    "budgetTokens": 123,
    "droppedCount": 123,
    "usedTokens": 123
  },
  "created_at": "2023-11-07T05:31:56Z",
  "created_by": "<string>",
  "error": "<string>",
  "error_details": "<string>",
  "id": "<string>",
  "last_user_message_at": "2023-11-07T05:31:56Z",
  "messages": [
    {}
  ],
  "parent_agent_id": "<string>",
  "plan_headline": "<string>",
  "plan_items": [],
  "project_id": "<string>",
  "root_agent_id": "<string>",
  "shared_with": [],
  "spawn_depth": 123,
  "spawn_tool_call_id": "<string>",
  "status": "<string>",
  "title": "<string>",
  "trigger_info": {},
  "trigger_type": "branch",
  "updated_at": "2023-11-07T05:31:56Z",
  "visibility": "<string>",
  "branches": [],
  "integration_grade": "<string>",
  "integration_response": "<string>"
}