declare function getLastSystemMessage(clientId: string): Promise<string>;
Retrieves the content of the most recent system message from a client's session history.
This function fetches the raw history for a specified client using getRawHistory and finds the last entry where the role is "system".
It is wrapped in beginContext for a clean execution environment and logs the operation if enabled via GLOBAL_CONFIG. The result is the content
of the last system message as a string, or null if no system message exists in the history.
| Parameter | Description |
|---|---|
clientId |
The unique identifier of the client session whose last system message is to be retrieved. |