* This method is currently not called from the streamChatEnhanced() flow,
     * but is provided as an extension point for future DIRECT_ANSWER intent support.
     */
    @Override
    public void generateDirectAnswer(final String userMessage, final List<LlmMessage> history, final LlmStreamCallback callback) {
        final LlmChatRequest request = new LlmChatRequest();

        final String resolvedPrompt =