- Introduced JetStream persistence, WebSocket and MQTT support with new authentication methods and added several monitoring endpoints (jsz, accountz, tag‑filtered PING, etc.)
- Added extensive JWT and security enhancements such as scoped signing keys, strict signing usage, export thresholds, TLS/ authentication timeout defaults and TLSMap overrides
- Fixed numerous bugs and stability issues including logging, duplicate subscriptions, route parsing, TLS leafnode handling, monitoring inaccuracies, and other reliability problems
Release v2.2.0
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Added Leafnodes support with a configurable dial timeout option for high‑latency links
Upgrade to Go 1.25.12 and bump critical dependencies (klauspost/compress v1.19.2, golang.org/x/crypto v0.55.0).
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;