{
  "name": "sessions_fork",
  "description": "Fork a session at an optional message id (creates a new session that branches from the original).",
  "input_schema": {
    "type": "object",
    "properties": {
      "sessionId": {
        "type": "string"
      },
      "upToMessageId": {
        "type": "integer"
      }
    },
    "required": [
      "sessionId"
    ]
  },
  "timeout": 30
}