Sovereign – Multi-agent OS with GraphRAG memory and HITL checkpoints
Runtime pause-and-resume checkpoints during execution plus per-agent escalation policies are a rare, practical safety feature — not just a pre-flight approval checkbox. The hybrid memory that scores vector similarity, BM25 keyword relevance, and entity/relation overlap together is a smart middle path between heavyweight graph DBs and plain vector stores. There's real engineering here (Docker compose, 55/55 tests, telemetry endpoints), though I'd like to see benchmarks and how the in-process GraphRAG scales versus external vector/graph services.