- Added extensive JetStream enhancements (atomic batch publishes, counter streams, prioritized consumer groups, delayed scheduling, async writes, strict API v2 mode, offline asset handling, and replica stream improvements).
- Introduced new security and connectivity options: TLS insecure cipher suite toggle, X25519MLKEM768 curve, trusted proxy support, OCSP request compliance, and leafnode isolation/disable features.
- Implemented numerous bug fixes and performance upgrades, including improved logging, filestore memory management, Raft behavior corrections, and a 10× increase to the default max buffered messages.
Release v2.12.0
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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;