HKUDS/LightRAG (38,345 stars, EMNLP 2025), microsoft/graphrag (35,081) and milvus-io/milvus (45,426) remain the three anchors of graph and vector retrieval, all clustered within 10K stars of each other. None has broken away, which is itself the signal: graph RAG has not consolidated on a winner after eighteen months. Anyone choosing a knowledge-graph retrieval backend today is still picking among three viable, actively maintained options rather than a default.