curl -sS --fail-with-body \
  "https://ark.cn-beijing.volces.com/api/v3/dreams/$DREAM_ID" \
  -H "Authorization: Bearer $ARK_API_KEY"

{
  "type": "dream",
  "id": "drm-20260924143000-a1b2c",
  "status": "running",
  "inputs": [
    {
      "type": "memory_store",
      "memory_store_id": "memstore-20260920100000-source"
    },
    {
      "type": "sessions",
      "session_ids": [
        "sesn-20260921100000-a1b2c",
        "sesn-20260922100000-d3e4f"
      ]
    }
  ],
  "outputs": [
    {
      "type": "memory_store",
      "memory_store_id": "memstore-20260924143000-output"
    }
  ],
  "model": {
    "id": "<MODEL_ID>"
  },
  "instructions": "保留稳定偏好和已验证结论；删除重复、过期和包含个人身份的信息；按主题组织结果。",
  "created_at": "2026-09-24T06:30:00Z",
  "ended_at": null,
  "usage": {
    "input_tokens": 12480,
    "output_tokens": 2080,
    "cache_read_input_tokens": 4096,
    "cache_creation_input_tokens": 1024
  },
  "running_time": 128.5,
  "error": null
}