30-task plan across 4 gated phases: - Phase A (Foundation): Client, Parser, SubList, Server, Routes, Gateways, Leaf Nodes, Accounts - Phase B (Distributed Substrate): RAFT, Storage, Config/Reload, Monitoring - Phase C (JetStream Depth): Core, Clustering - Phase D (Protocol Surfaces): MQTT, JWT Includes concrete test code, TDD steps, and task dependency tracking.