flowchart TD A0["Raft Consensus Engine"] A1["WAL and Backend Snapshot Storage"] A2["gRPC Key-Value API and clientv3"] A3["Multi-Module Go Repository"] A4["etcdctl / etcdutl Command-Line Tools"] A5["Security and Trust Boundaries"] A6["Robustness Testing Framework"] A7["Feature Gates and Release Stages"] A8["Cluster Membership and Peer Communication"] A9["Data Integrity and Corruption Detection"] A2 --> A0 A0 --> A1 A4 --> A2 A4 --> A1 A5 --> A8 A5 --> A2 A6 --> A0 A6 --> A9 A7 --> A8 A8 --> A0 A9 --> A1