{
  "id": "core-08-session-close",
  "title": "session_close ends the session",
  "category": "core",
  "version": "aicc/0.1",
  "description": "After session_close, further tool calls must fail with session_expired.",
  "steps": [
    {
      "send": {
        "type": "session_close",
        "reason": "conformance"
      }
    },
    {
      "expect": {
        "type": "session_close"
      }
    },
    {
      "send": {
        "type": "tool_call",
        "tool": "echo",
        "input": {}
      }
    },
    {
      "expect": {
        "type": "error",
        "error": {
          "code": "session_expired",
          "retryable": false
        }
      }
    }
  ]
}