Function getLastUserMessage

Retrieves the content of the most recent user 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 "user" and the mode is "user". 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 user message as a string, or null if no matching user message exists in the history.

const lastMessage = await getLastUserMessage("client-123");
console.log(lastMessage); // Outputs the last user message or null
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