final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String assistantContentMode = fessConfig.getOrDefault("rag.chat.history.assistant.content", "smart_summary");

        final LlmClient client = llmClientManager.getClient();
        final int assistantMaxChars = client != null ? client.getHistoryAssistantMaxChars() : 800;

# Highlight settings for RAG search.
rag.chat.highlight.fragment.size=500
rag.chat.highlight.number.of.fragments=3
# History content mode for assistant messages (full, smart_summary, source_titles, source_titles_and_urls, truncated, none).
rag.chat.history.assistant.content=smart_summary

# Index Export
index.export.path=/var/lib/fess/export
index.export.exclude.fields=cache
index.export.scroll.size=100
index.export.format=html