* @param userMessage the user's message
     * @param documents the documents to summarize
     * @param history the conversation history
     * @param callback the streaming callback
     */
    void generateSummaryResponse(String userMessage, List<Map<String, Object>> documents, List<LlmMessage> history,
            LlmStreamCallback callback);

    /**
     * Generates an FAQ answer using document content (streaming).