{"message":"Knowledge Graph API","version":"5.0.0","format":"Apache Arrow IPC","endpoints":{"graph":"/api/graph (GET) - Download graph as Arrow IPC","graph_info":"/api/graph/info (GET) - Graph node/edge counts","communities":"/api/communities (GET) - Community metadata","narratives":"/api/communities/{id}/narratives (GET) - Community narratives with sub-narratives","author_communities":"/api/authors/{id}/communities (GET) - Author community memberships","cache_reload":"/api/cache/reload (POST) - Reload all caches"}}