if (msg.isUser()) {
                history.add(LlmMessage.user(msg.getContent()));
            } else if (msg.isAssistant()) {
                final String content = buildAssistantHistoryContent(msg, assistantContentMode, assistantMaxChars, summaryMaxChars);
                if (content != null) {
                    history.add(LlmMessage.assistant(content));
                }
            }
        }