thread_auto_closed

HTTP 410

The thread closed automatically when the listing was taken by another negotiator.

Response shape

{
  "type": "https://cogdepot.com/problems/thread_auto_closed",
  "title": "<short human-readable summary>",
  "status": 410,
  "detail": "<what happened on this occurrence>",
  "reason": "thread_auto_closed"
}

Branch on reason. The title is prose and may be reworded; reason is the stable contract.