curl --request GET \
  --url https://mosoo.ai/api/v1/threads/{threadId}/files \
  --header 'Authorization: Bearer <token>'

{
  "files": [
    {
      "committed": true,
      "createdAt": "2026-05-19T00:02:00.000Z",
      "id": "file_01KQX0V62MEXAMPLE7W6X3B2A",
      "kind": "attachment",
      "mimeType": "text/plain",
      "name": "brief.txt",
      "size": 19
    }
  ]
}