*
     * @return true if LLM chat is configured and available, false otherwise
     */
    public boolean available() {
        final String llmType = getLlmType();
        if (Constants.NONE.equals(llmType)) {
            if (logger.isTraceEnabled()) {
                logger.trace("[LLM] LLM not available. llmType=none");
            }
            return false;
        }