{
  "id": "session.logged_out",
  "category": "server_lifecycle",
  "summary": "The bot session has logged out.",
  "match_any": [
    {
      "error_code": 400,
      "description_exact": "Logged out"
    }
  ],
  "scope": {
    "method_examples": [],
    "exhaustive": false
  },
  "possible_causes": [
    "The server is completing a bot logout."
  ],
  "diagnostic_limits": "Not every 400 response begins with Bad Request. This signature alone does not explain why logout was initiated.",
  "evidence": [
    {
      "source": "server-10.3",
      "path": "telegram-bot-api/Client.cpp",
      "lines": [
        17553,
        17555
      ],
      "note": "Stores a 400 description with no Bad Request prefix."
    },
    {
      "source": "server-10.3",
      "path": "telegram-bot-api/Client.cpp",
      "lines": [
        17520,
        17525
      ],
      "note": "The direct fail_query path preserves that description."
    }
  ],
  "example": {
    "method": "getMe",
    "response": {
      "ok": false,
      "error_code": 400,
      "description": "Logged out"
    }
  },
  "evidence_level": "source_derived",
  "guidance": {
    "action": "reconcile_bot_session_lifecycle",
    "repeat_request": "after_lifecycle_resolution",
    "preconditions": [
      "Determine whether logout or a server move was intentional before resuming requests."
    ]
  }
}